Aftermarket Cranks

[RJ Sledge]

BS Kyle, I'm a little bit long in the tooth to be trying to figure that out! Besides, I have you to figure it out for me. YOU need to brush up on the BS3 by the way!! Old folks need help.

Happy Thanksgiving!!

RJ

[KRatcliff]

You are going to shame me into helping you, aren't ya. Consider it a sympathy tune.

Happy Thanksgiving to you and yours.

[Rusty2211]

Popcorn fart.... RJ, you crack me up!

I have a pretty good understanding of moment of inertia and I can tell you that 1.5lbs on a 70 lb crank is not going to cause a noticeable increase in acceleration. Heck, if that is true I'm going to have my torque converter polished.

[Larry Hill]

Rusty it will not hurt.

[Larry Hill]

If a 400 "B" block is used in place of a "RB" 383, 413, 426, and 440 blocks the rod will be to short center to center and the compression height of the piston would be short. The rod and piston would be wrong.

Rods have a service life. I think NHRA should resend the use of "custom length" rod in Stock at the end of the 2014 season, for the FE Ford engine. If a racer has a new set of rods of "custom length" they will get two years service life from their investment.

NHRA has a chance to right a wrong that affects all of us that race stock. If you don't believe it affects all just think of this real life scenario.

Indy 2013 Stock. 180 entrants 128 qualifiers, what 52 cars can you out qualify? Lets say you are #129 and everyone is legal. Above you on the qualifying sheet are four FE Fords, all have the approved rod. All four are in bottom half of the field, just a few hundreds of a second in front of you. Part of the reason they are ahead of you is that every time the crank is turned from 2.437" to 2.200" the surface area of the original is approximately 10% bigger than the new finished size of 2.200. So if my math is correct the FE Fords have a 10% reduction in surface area and a big reduction in friction.

People who had a hand in getting the "Custom Length " rod approved by NHRA knew they were cheating the system. The worst thing they did was to cheat me and the other racers!

[Rusty2211]

Larry,
The rods are not custom length?? The center-to-center is the same as factory FE rods? I'll give you the fact the the rod is probably more reliable than the bigger rod end, but that's about it. When there are E/SA Mustangs that can run 10.00 at 3000' at Indy, I think you are barking up the wrong ladder.

Rusty

[Sean Cour]

Originally Posted by Rusty2211

Larry,
The rods are not custom length?? The center-to-center is the same as factory FE rods? I'll give you the fact the the rod is probably more reliable than the bigger rod end, but that's about it. When there are E/SA Mustangs that can run 10.00 at 3000' at Indy, I think you are barking up the wrong ladder.

Rusty

Rusty,

What E/SA Mustang might you be referring to? I only remember one at Indy in E, but it's wasn't the one that can run 10.00's in 3000 ft. of air. Care to elaborate on your scientific findings?

[Rusty2211]

Sorry..it was a 10.25 at 129 in E/SA a couple of years ago in 3000'

[RJ Sledge]

Larry

While you are figuring out all the frictional saving from the 2.200 journal from the 2.438 Ford journal, you also need to take into account that the Ford bearing is only .734 wide as compared to a Chev 2.200 bearing that measure .892 wide. Sounds to me like you not using all the pertinent info in your equation. By my figures it looks like there is 11% less drag with a Ford bearing for a 2.438 journal as compared to the Chev 2.200. Oh, my Crower rods are 6.488 in length and my pistons have the correct C/H number per NHRA.

With that said I think NHRA should take about 10 hp off the FE Crower rod Combo. How bout you???

RJ

Happy Thanksgiving

[SSDiv6]

Originally Posted by Larry Hill

If a 400 "B" block is used in place of a "RB" 383, 413, 426, and 440 blocks the rod will be to short center to center and the compression height of the piston would be short. The rod and piston would be wrong.

Rods have a service life. I think NHRA should resend the use of "custom length" rod in Stock at the end of the 2014 season, for the FE Ford engine. If a racer has a new set of rods of "custom length" they will get two years service life from their investment.

NHRA has a chance to right a wrong that affects all of us that race stock. If you don't believe it affects all just think of this real life scenario.

Indy 2013 Stock. 180 entrants 128 qualifiers, what 52 cars can you out qualify? Lets say you are #129 and everyone is legal. Above you on the qualifying sheet are four FE Fords, all have the approved rod. All four are in bottom half of the field, just a few hundreds of a second in front of you. Part of the reason they are ahead of you is that every time the crank is turned from 2.437" to 2.200" the surface area of the original is approximately 10% bigger than the new finished size of 2.200. So if my math is correct the FE Fords have a 10% reduction in surface area and a big reduction in friction.

People who had a hand in getting the "Custom Length " rod approved by NHRA knew they were cheating the system. The worst thing they did was to cheat me and the other racers!

Larry,
The guys that ran this combination, had pistons with a shorter compression distance to compensate the deck difference. Like said before by others, if they had removed the rod and piston, they would have been caught.

...and by the way, this same discussion was brought up on this forum many times, including this posting...

http://classracer.com/classforum/showthread.php?t=8142