Saturday, February 22, 2014

Patience or Approval

These things hast thou done, and I kept silence; thou thoughtest that I was altogether such an one as thyself: but I will reprove thee, and set them in order before thine eyes.  Now consider this, ye that forget God, lest I tear you in pieces, and there be none to deliver. Psalm 50: 2-22


These two short verses should serve as a dire warning to those who would mistake Jehovah's patience for approval! 


In context this is addressed to the wicked, who are given a laundry list detailing "these things hast thou done."  It has been said that the wheels of justice turn slowly, and it seems to be human nature to think that our misdeeds which have gone unpunished have been forgotten.  Not so, says the almighty God!  He promises that one day all of our sins will be laid out before our eyes, and at that point there is no one who can deliver you from his wrath.


Consider that ...and if it brings fear to your heart, then perhaps you are ready to hear about the savior who CAN save you from the judgment you deserve.

Friday, February 14, 2014

Shovelheads Again

Unfortunately I was unable to get pictures to load for this post -  sorry - that would have made it much easier to follow and understand the material presented here.


It is not uncommon for me to receive a question in the comments section of my blog posts.  Sometimes it is an easy answer, but other times it requires a little more... and that may lead to a whole new post.  Such is the case here.  I recently  received the following in the comments section  of an older post:


 I'm interested in building a big bore shovel and have toyed with some do it yourself porting...there's some interesting views from the nightrider web site: How to Build a High Performance Shovelhead Engine.  I don't have a flow bench so was contemplating just smoothing out intake harsh edges and general polishing in lieu of redesign? Appreciate your thoughts if you care to comment...




First of all, a thank you to Dave for asking a very good question.  Probably most wrenches who worked in a dealership in the 1980's or before will recognize the sheets copied on the nightrider site.  I don't remember if they handed them out at the factory service school when I attended, or if my set was passed down to me from a previous attendee.  Either way, this info has been out there for a long, long time.  For reader's convenience I scanned my copies and attempted to place them her in the text, but to no avail.  Apparently the man behind the curtain at "Blogger" is too busy conquering the world to keep the picture uploading feature working at the moment. 







The material on shaping the intake ports presented therein (figures 5 and 6 in the link) has probably been the basis for a number of porting jobs.  However, before you drag out your TIG welder, consider this: if executed properly, this modification will indeed increase performance by way of greater flow.  Executed poorly, however the port modifications described can result in a net loss of performance. 






Unfortunately the difference between well executed and poorly executed can be very difficult to ascertain without the aid of a flow bench.  The reason is that the modification to the floor of the port leading to the valve seat (commonly called the short side radius) is one of the areas of a port that has the most potential for gain in airflow, but is also the most sensitive to shape.  The fact is, this area is one of the worst features of a stock Shovel head casting and also the most difficult to "fix."  It cannot be optimized by grinding; the problem is there is already not enough material there.  What is really needed is more material - just like this old performance paper suggests.








Stop!  I already warned you to hold up on dragging out the welder!  If you are going to start welding, you also may want to consider this; you will also need the ability to machine your heads for new valve seats.  Here is the reason.  If you look at Figure 6 in the link, you  will notice a dimension labeled 1.64 DIA. This smaller dimension just under the valve seat is commonly called the "choke" or venturi.  Let's stick with calling it the choke since there is also a similar situation in your carburetor also called a venturi.  And just to keep things on the up and up, I should mention that in porting discussions another choke is often mentioned, that being the place in the port that has the smallest cross sectional area other than the one just below the valve seat.  Of course that leads me to feel the need to point out that there is a 3rd item in the intake tract called a choke, which of course is in the carb and used for starting.  You can completely ignore that one!  So to sum up, there are 3 chokes and 2 venturi, but the only ones we are concerned with for this discussion are in the head.




This choke dimension (the one just under the valve seat - remember?), or more precisely the relationship of this dimension to the valve head diameter,  has an important relationship to airflow past the valve.  Now the nominal head diameter of a Shovel intake valve is 1.937 (1-15/16) often referred to as 1.94.  The 1.64 dimension means that this modification is calling for the choke to be just less than 85% of the valve size.  While it is easy enough to see where this 85% figure came from, putting my stamp of approval on it is a little harder.  The early SuperFlow  flow bench instruction books show a diagram of the ideal intake port area and shape and show the 85% relationship.  The key word there is ideal.  The only less ideal port shape than the Shovelhead which comes to mind are the tortuous switchbacks in the Knuckle/Pan intake tract.




Be that as it may, if you were to take your ordinary everyday Shovel head and measure the inner diameter of the valve seat insert, you may be surprised (or not) to find a number like 1.820".  Now if you do a little reverse engineering you will find that gives a choke percentage of almost 94% (1.820 divided by 1.937).   Now 94% is a far cry from 85%, but it gets worse (at least form the 85% perspective).  When  you were measuring intake seat insert, did you notice that it  that it really didn't line up with the aluminum of the port very well?  You aren't that observant?  Go back and look.  I'll wait....




Okay, visualizing the direction the mixture must travel, what do you think all of those 90 degree corners will do for your air flow?  What do you mean you left the head out in the shop?




So what you could do is remove the valve seat inserts, weld in all the areas shown in the drawing (and you may as well do something with the equally offensive exhaust port while you are at it) machine for new seats that have both a larger outer diameter and a smaller inner diameter, grind the port to match the diagram and do a valve job.  Piece of cake, right?  Oh... and before you decide to take a shortcut using some sort of porting epoxy, don't even consider leaving it hanging out over the seat insert as shown in the diagram.  It's life expectancy in an air cooled engine on the street will be far less than you like.





But, that is not to say there is no hope for you do-it-yourselfers.  First of all let's go back to that 85% choke figure.  It's probably a decent ratio for an exhaust valve, and maybe even for the situation in the diagram, but are you really going to spend the time and money trying to duplicate it?  Many, if not most cylinder head porters will tell you (if they are willing to tell you anything) that a good rule of thumb is to make the choke 90% of the intake valve diameter.  I have heard some of the very best say that you may sometimes need to go as high as 91% but absolutely no higher.  At least part of the reason is easy enough to visualized.  Air likes to turn in maximum increments of 15 degrees (which explains the angles used on a valve job) but it needs a little length for each of those angles - about .060" is enough.  But on a stock shovel seat insert with its I.D. at 94% of the valve, how much room is left on the inside for a 60 degree once the 45 degree angle is cut (or ground)?  Little to none, that's how much; and forget about adding a 75 degree angle.  Not much help in turning that air!




It is often said that one of the biggest factors in performance is the valve job.  But for the reasons stated above, I say: "Not on a stock Shovel!" On a stock Shovel about all the valve job can do is make a seal.  Sadly there is no material present to put good valve job on to help get that air turned.  Want to change that?  Put in a 2 inch intake valve.




Simple as it is, it improves several things.  First of all, suddenly there is enough meat left in the seat insert to add a couple more angles under the 45 degree seat.  Now your valve job can be a little more conducive to flow that the simple on/off spigot it was before.  Plus, now your choke percentage is a far more reasonable 91%.
 


As to the actual valve job, if you remember the 15 degree airflow rule of thumb, it becomes fairly obvious.  Just make sure that the outer edge of your 45 degree seat coincides with the outer edge of your valve.  That will leave the maximum room below that 45 for your 60 degree, 75 degree, and in the unlikely event that the I.D. of your seat insert is too small, a 90 degree.



Once you have an actual performance valve job in place, Dave's instinct to just smooth out the harsh edges is about right.  The turn that the floor of the port makes just before the valve (called the short side or short turn radius) is always a major offender on Shovel heads.  If the seat insert does not line up with the aluminum of the port in this area, don't be afraid to do a little grinding on said insert as part of putting a radius on this turn.  If you are more ambitious, get yourself a set of inside calipers and work at keeping the cross sectional area constant from the port opening to the short side radius.  And don't forget, if you want both heads to flow the same amount, you will want that cross section constant from front head to rear head also.




Finally, one disclaimer:  You don't get something for nothing. A 2 inch intake valve is heavier than a 1.94.  If your valve springs were marginal before, they are even less likely to provide good valve control with a heavier valve.  That's not too hard or expensive to take care of.  A bigger concern may be valve to valve clearance.  All things being equal, a .060" larger intake valve will be .030" closer to the exhaust valve when they pass each other during overlap.  The hotter the cam you have, the more likely that you will have issues.  If you decide to go with 2 inch intakes, you should check this whether it be via a full blown mock up on the engine or a bench check using the TDC lifts listed for your cam.


Of course that brings up at least one more question.  Is it possible to get a good flowing Shovel intake port without going to a 2 inch intake?  The answer is that you most definitely can.  With the aid of a flow bench many (myself included) have been doing it for many years.  But to do so one needs to make up for that poor seat shape somewhere, and that "somewhere" is most easily found via a flow bench.






Wednesday, January 22, 2014

His Grandmother Was A Monkey

Now for something a little different ...humor.  Well, at least I find it funny.  A fine fellow who goes by the name of Dan Arel has a post on a humanist blog entitled "Why Bill Nye shouldn't debate Ken Ham"  Now, in order to appreciate my unorthodox attempt at humor here, one really must follow the link and read his post.  Then come back here and see how, with just a little editing (including a sprinkling of scripture), I have taken his post which is, how should I say this... less than flattering of Christians, and turned it into something someone on the other side of the debate might enjoy.  Keep in mind that my changes are in bold italic; the rest are Dan's words so I am not entirely sure I can be accused of name calling.  In any case, I offer this in the spirit of good fun and hope no one takes too much offense, though I firmly believe that my version will prove more accurate in the long run; long run being like, you know - eternity.


So, without further fanfare, back at ya Danny Boy:




Why Bill Nye Shouldn't Debate Ken Ham


Creationists should not debate evolutionists. Period. This may sound harsh but let's start by looking at what sparked this statement. TV personality and science advocate Bill Nye (Bill Nye the Science Guy) has accepted an invitation to debate Ken Ham of Answers in Genesis / The Creation Museum on February 4, 2014 at the Creation Museum in Kentucky.


This is a bad idea and here is why.


Debating evolutionists offers their position credibility

When you accept a debate, you are accepting there is something worth debating. Political ideologies are worth debating, religion as it pertains to things like human well-being and flourishing can be worth debating, because these kinds of ideas claim to offer solutions to problems and they are debating the best way to solve such problems. While debates about the existence of God can be fun, they are not really that meaningful, since what can be known about God is plain to all men, because God has shown it to them. For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made(Romans 1:19-20).


Creationism vs. evolution however is not worth debating. Why? Simple, there is nothing to debate. Evolution is a fairy tale, backed by mountains of propaganda, peer-reviewed papers (i.e. reviewed by others "in the faith" of evolution) you could stack to the moon and an incredible consensus of those whose "foolish hearts were darkened "(Romans 1:21). Creationism is a time tested history that is based on the word of God, on faith and logic. It also has a mountain of peer-reviewed papers (i.e. reviewed by others "in the faith" of Christianity) to back up its claims. Creationism has absolutely no scientific consensus, which is meaningless since as Christians we do not judge what is true or false by "consensus" as so many in the "scientific" community do. Creationism is not even considered science due to the fact that, just like evolution, it cannot be tested.


Why would a scientist debate this? Nye would do more for his world view by going on TV and indoctrinating youngsters into putting their faith in evolution and the importance of secular education instead of giving Ken Ham any publicity and a public forum with thousands, if not millions of viewers, to present the truth. Ham is a wise man and Nye just offered him up a forum to defend God’s word. It would have better for Nye to simply repeat his mantra over and over; "evolution is science".

Nye is not a biologist

I do not know an incredible amount about Bill Nye other than I loved his show. However, a Google search only turned up that Nye has nothing more than a bachelor’s degree in engineering and three honorary doctorate degrees. [Note: a Bing search on the original author, Dan Arel, turned up even less in the way of education, yet this comes across as reading "clearly Nye does not have enough education to be considered one of we elite.  My apologies if he was not actually peering down his nose as he wrote it]  We fault Christian apologists almost daily for trying to ride their honorary degrees, it would seem only fair we hold Nye to the same standard.


So we have Nye, a very smart man with a degree in engineering, not biology, not anthropology, and he does not practice any form of research science. Nye should be credited greatly for his work in education; but as a qualified candidate to defend evolution, especially against the likes of common men like Ken Ham, he is not.

You must fully understand your opponent

This is mere speculation but I have no reason to believe that Nye has the firm grasp on creationism that would be needed to go up against the likes of someone like Ham.


To win a debate successfully you must understand your opponent's position better than they do, in fact, you should know it well enough that you could debate for them.


Evolutionist have no rules, their dishonesty stops nowhere. Nye will attempt to use popular opinion falsely labeled as science and reason to bring down Ham, but Ham will care little for any pseudo facts or invented evidence and will stick to common sense and will feed on man’s conscience and use terms like "irreducible complexity" to confuse evolutionists. Key phrases like "half a wing" will fly from his lips as he openly ignores so called science's amazing misunderstanding of the impossibility of the evolution of things like the eye, or wings. Ham will be relying on faith, wisdom and biblical teachings to inform the viewers and will attempt to call out anytime science was obviously wrong to tear down its facade of unimpeachable credibility.


This debate is being held at the Creation Museum itself and this will ensure that the brain-dead evolutionist zombies come out in droves to tear down Ham and loudly mock anytime he points out a fallacy of evolutionist doctrine. Meanwhile Nye will likely abstain from shouting out that his grandmother was a monkey.

 

I honestly think it would be sad to see Ham destroy Nye, since Nye’s reward is in this world only. A little known figure outside of his circles, Ham will continue to be ignored by those who love to mislead impressionable youth around the world.

The American people will likely distrust Ham’s motive in offering such a debate and if he goes down, he will take down a lot of faith and history with him. The American people, who are already wary of so called science due to the global warming scam, are still unlikely to disown the idea of evolution since most of them have been brain washed into that faith for most of their lives. Nye on the other hand has little to lose since a loss will be chalked up to his lack of education and will never see the light of day.

Nevertheless, evolutionism
is a worthless and uneducated position to hold in our modern society so kudos to Ken Ham for his willingness to expose it for what it is in the face of so many who, "claiming to be wise, have become fools" (Romans 1:22).

Sunday, January 5, 2014

Harley Hot Shot

Almost 2 months back I posted about an old Hot Rod magazine article featuring a Big Stroker.  As luck would have it, the same magazine from 1960 had a second vehicle featured with a Knuckle motor; this one a Bonneville car.  Yes, I said car as in automobile ...but with a Harley Knuckle motor.


 
 
The car was hand built using a mold taken from an English Cooper racer, two inch tube frame and Ford Anglia front suspension.  Rear axle was none other than a Harley Davidson Servi-Car (trike) unit.  
 

 
A fellow by the name of Bill Burke was the car's owner.  While Harley enthusiasts may not be familiar with that name, he is a Bonneville legend, credited with building the first belly tank racer.
The engine builder may be more familiar to those interested in early motorcycle drag racing, since it was well known racer C.B. Clausen.  He built this Knuck motor to 90 inches, modifying the heads for a pair of Riley carbs and supplied his own cam grind.
 
The car ran 151 MPH at the '59 Bonneville meet, coming up short of the expected 180 due to galled pistons.  I think all of us Knucklehead fanatics out here can empathize with that; myself perhaps more than most!  It would be interesting to find out if that 180 MPH speed was ever attained, and where it is now. 


Monday, December 23, 2013

The Savior's Birth

Here we are at the time of year when the birth of Jesus Christ is commonly celebrated.  One of the most pertinent scriptures regarding that event is found is Matthew 1:21:

And she shall bring forth a son, and thou shalt call his name Jesus: for he shall save his people from their sins.

Amid all the hoopla and misdirected celebration, don't forget that the mere fact of his birth (miraculous as it was) did not accomplish that saving.  A better place to contemplate that aspect is found in the book of the prophet Isaiah.

Behold, my servant shall deal prudently, he shall be exalted and extolled, and be very high.  As many were astonied at thee; his visage was so marred more than any man, and his form more than the sons of men:  So shall he sprinkle many nations; the kings shall shut their mouths at him: for that which had not been told them shall they see; and that which they had not heard shall they consider.
Who hath believed our report? and to whom is the arm of the Lord revealed?  For he shall grow up before him as a tender plant, and as a root out of a dry ground: he hath no form nor comeliness; and when we shall see him, there is no beauty that we should desire him.  He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not.  

Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.  But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.  All we like sheep have gone astray; we have turned every one to his own way; and the Lord hath laid on him the iniquity of us all.  He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.  He was taken from prison and from judgment: and who shall declare his generation? for he was cut off out of the land of the living: for the transgression of my people was he stricken.  And he made his grave with the wicked, and with the rich in his death; because he had done no violence, neither was any deceit in his mouth.  

Yet it pleased the Lord to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the Lord shall prosper in his hand.   He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities.  Therefore will I divide him a portion with the great, and he shall divide the spoil with the strong; because he hath poured out his soul unto death: and he was numbered with the transgressors; and he bare the sin of many, and made intercession for the transgressors.   Isaiah 52:13-53:12

Now, if you just skipped over the scripture above, which is increasingly likely in this age when it seems that people are fleeing the oppressively long Blog in favor of the quicker (and necessarily  shallower) Twitter, then I urge you to reconsider.  Take a few minutes to read and contemplate what Christ endured as the sacrifice for sins.  If you can't take the time, I understand ...just pray that the one who poured out his soul unto death will understand why a little last minute shopping was more important.

Sunday, December 15, 2013

Kaya on Job

Recently my granddaughter Kaya was presented with the task of completing a written essay test for her freshman Theology class at Southwest Christian High School.  The following is what she wrote.  Keep in mind that this was a classroom test, not a homework assignment.  I am very proud of her!

A little over four years ago I published the first  ever "guest post" on my blog.  It was a short piece by one of my daughters called "Our Medicated Society".  As it happens, this "second ever" guest post was written by her daughter.  It would appear that she is following in her mother's footsteps in writing prowess.


Job is a book of The Bible about a man who is righteous in the eyes of God. God wants to prove Job's faith to Satan, so He allows Satan to test Job. Job loses everything he has and all of his children die. His first instinct is to praise God. It takes great faith to be able to worship right after something terrible happens to you, but that's the kind faith Job had. We should have this kind of faith too. We need to be able to stand firm in our faith when everyone and everything is going wrong around us, and that is the theme of my essay.

Standing firm in our faith is one of the most important things about our lives as Christians. If someone around us is doing something wrong we need to be able to hold ourselves accountable, and not fall into the sin ourselves. Satan will try to tempt us, and he knows exactly how to get every one of us to sin. He knows what our weaknesses are. But the difference between God testing Job, or us, and Satan tempting us is that God longs for us to pass His test. Satan desires for us to fail. Standing firm in your faith in every situation means that you don't let Satan tempt you enough that you fall. You don't give in to the sin. The definition of 'standing firm' according to dictionary.com is, "1. stand up or offer resistance to somebody or something, 2. refuse to abandon one's opinion or belief." This is what we need to do. We need to resist Satan and the human urge to sin, and we must refuse to abandon our beliefs no matter who is trying to get us to give up on them.

For Job, his friends and his wife all urged him to give up on God. Job 2:9 says, "9 Then his wife said, "Do you still hold fast your integrity? Curse God and die." Job's wife was the first one who tried to get him to abandon his beliefs in God. For us it may not be a wife, since we aren't married yet, but it could be a best friend, a boyfriend, or maybe even another family member. These are some of the people that have the most influence on us, and they are the ones who may cause us to stumble in our hope of 'standing firm'. When it's someone we are close with who is tempting us, it's a lot harder to say no to them. But Job did, and I think this was a moment when his faith really shone through him. He tells his wife that what she said was not okay and she should be ashamed because of how foolish it was. Where this response is found is in Job 2:10. It says,"10 But he said to her, "You speak as one of the foolish women would speak. Shall we receive good from God, and shall we not receive evil?" In all this Job did not sin with his lips." Job said these things because he was NOT going to falter in his faith, not even because that's what his wife wanted. By telling her that, and saying those things, he didn't stumble at all. He stood firm, didn't give in, and did not sin.

This theme reveals much about God's character, His eternal sovereignty, and human suffering. What it shows about God's character is that, he will test us, but since he wants us to pass the test he won't push us past what we can handle. He knows what we can handle because he is omniscient. He knows all. He knows exactly what would cause us to sin, and what our limits are, and he would never cause us to fall into sin because he loves us way too much to see us fall. What it shows of His eternal sovereignty is that, He is bigger than everything Job went through, and he ultimately has the say in what goes and what doesn't. Satan couldn't have done all this to Job without God's permission. What it shows about human suffering is that above it all, God has full control over the situation. If you stay faithful and 'stand firm' throughout the suffering He WILL reward you greatly. Job didn't ever sin by cursing God, he didn't waver in faith when his wife wanted him to or when he was with his friends. He stayed true to who he was in The Lord, and he was rewarded in the end. God restored him and rewarded him with twice as much riches, animals, and wealth as he had had before. He and his wife bore the same amount of children as they had had before. Job was fully renewed. All thanks to God's love, power, and grace in suffering.

In closing, I just want to remind everyone that this is how we should react during time of great need or suffering. We need to stand firm in our faith like Job did, no matter what is going on around us, and no matter who we are with at the moment. If we can't stay strong and true to our faith when we're with a certain friend or we're going through a tough time or situation, then our faith simply is not strong enough. We need it to be as strong as possible because we will be tempted and tested at some point if we haven't been already. God needs to be our strong foundation which will make our faith so much stronger. If you don't have a strong enough foundation on God you need to get to know Him, because standing firm and not giving in for God's glory is even greater than you can imagine.

Thursday, November 28, 2013

A Day of Thanksgiving

A Psalm of praise.

Make a joyful noise unto the LORD, all ye lands.
Serve the LORD with gladness: come before his presence with singing.
Know ye that the LORD he is God: it is he that hath made us, and not we ourselves; we are his people, and the sheep of his pasture.
Enter into his gates with thanksgiving, and into his courts with praise: be thankful unto him, and bless his name.

For the LORD is good; his mercy is everlasting; and his truth endureth to all generations.
(Psalm 100)

We I have much to be thankful for (I will not presume to speak for everyone).  Good health, a beautiful loving wife, a wonderful family who nearly all claim Christ as Lord and Savior (and live like they mean it), and a business that never seems to lack for work.  Add to that a good doctrinally solid church with a equally good doctrinally solid pastor.  Add to that a great place to live in the country.  Add to that food and clothing enough that I never go hungry or cold.  Add to that a dog who is the best dog ever (and possibly the smartest).  And that is only the tip of the iceberg!

Indeed Jehovah, he is God, and I am very thankful to be one of the sheep of his pasture for he is good. And I am so thankful that his mercy is everlasting, because I, more than most, am a debtor to that mercy!