Aftermarket Cranks

[jmantle]

Larry, I thought your post was right on before it disappeared.

I just read the whole stock section in the new 2013 rulebook about a dozen times, didn't want to miss anything. Found the following,

"Any special equipment export kit
(superchargers, dealer-installed options, etc.) automatically
disqualifies car."

That should take care of the group 19 AMC stuff.

"Lightening of crankshaft other than normal balance job prohibited."

How can turning a 2.437 journal down to 2.200 not be considered lightening the crank?
That's almost 2 lbs.

Jim Mantle U/V/SA 6632

[SSDiv6]

Originally Posted by jmantle

Larry, I thought your post was right on before it disappeared.

I just read the whole stock section in the new 2013 rulebook about a dozen times, didn't want to miss anything. Found the following,

"Any special equipment export kit
(superchargers, dealer-installed options, etc.) automatically
disqualifies car."

That should take care of the group 19 AMC stuff.[/QUOTE]

Before the parts were approved for the AMC, similar parts have been approved for Chevy, Ford and Mopar. Such as a Chevy 327 intake on 283 engines; Boss 351 using a Holley in lieu of the Motorcraft carburetor, 4BBL Hemi Nascar engine and more...

Originally Posted by jmantle

"Lightening of crankshaft other than normal balance job prohibited."

It has been going on for years; you can even buy an OEM light crankshaft from Crower for Chevy engines.

Originally Posted by jmantle

How can turning a 2.437 journal down to 2.200 not be considered lightening the crank?
That's almost 2 lbs.
Jim Mantle U/V/SA 6632

How did you calculate the weight loss when you do not have an idea of the material density removed? The crankshaft journal size change was dictated by the NHRA approved rod, the same as other engine makes such as the Oldsmobile small block and Chevy.

[Dinsdale]

So, let me get this clear in my head. "Stock Eliminator" allows aftermarket blocks, heads, rods, pistons, transmissions, clutches, rear ends, wheels, tires, suspension, shifters, unheard of cam durations. Lately added are valve job modifications roller rockers, now replacement seats and cranks. I find it hard to believe anyone would bitch about rod journal diameter while endorsing all the other "Safety" enhancements they now enjoy in "Stock"

Nothing even close to Stock with this class for a long time so might as well count the days until it's dead and you're a SS car like it or not.

[jmantle]

Originally Posted by SSDiv6

That should take care of the group 19 AMC stuff.

Before the parts were approved for the AMC, similar parts have been approved for Chevy, Ford and Mopar. Such as a Chevy 327 intake on 283 engines; Boss 351 using a Holley in lieu of the Motorcraft carburetor, 4BBL Hemi Nascar engine and more...

It has been going on for years; you can even buy an OEM light crankshaft from Crower for Chevy engines.



How did you calculate the weight loss when you do not have an idea of the material density removed? The crankshaft journal size change was dictated by the NHRA approved rod, the same as other engine makes such as the Oldsmobile small block and Chevy.[/QUOTE]

I fully acknowledge this stuff has been going on for years, just pointing out that some of us don't agree with it, especially in stock.
NHRA could have published separate approved rod lists for stock and SS and kept stock journal sizes in stock, never understood why they didn't.
As far as the weight of the cranks goes, steel weighs .283 lbs per cubic inch, ductile iron a little less depending on the grade.

Jim Mantle U/V/SA 6632

[RJ Sledge]

JimR

Wake up Buddy, the 400 block 440 Combo has been around for quite awhile, can't believe you haven't known about it. The Wizard might not be the smartest guy around, but I don't believe that "ignorant" is the correct definition for him. I would have to put him on a short list of most knowledge engine people, but what the hell do I know its just my opinion.

Larry.......Hello?....where'd you go....Larry? did we lose you?? LOL

2.437?

RJ

Happy Thanksgiving everyone.

[treessavoy]

Originally Posted by R J Sledge

JimR

Wake up Buddy, the 400 block 440 Combo has been around for quite awhile, can't believe you haven't known about it. The Wizard might not be the smartest guy around, but I don't believe that "ignorant" is the correct definition for him. I would have to put him on a short list of most knowledge engine people, but what the hell do I know its just my opinion.

Larry.......Hello?....where'd you go....Larry? did we lose you?? LOL

2.437?

RJ

Happy Thanksgiving everyone.

RJ,

I'm sure he's smarter than me and I didn't mean he's stupid just ignorant of Mopar blocks. You can't make a 400 into a 440 and vice versa. Rods, cranks, pistons and intakes don't interchange. 400 and 383 are closer together and there is interchangeabilty. How would you get a 400 block out the 440 and still use stock pistons and vise versa and you can't make the blocks look the same on the outside?
I know bracket racers have been running the 451 for a long time but all of the Max wedge cars I've looked at had the raised block and as for 6 packs you still can't disguise a 400 for a 440 unless you grind off that giant pad on the front of the block.

JimR

Maybe I'm too honest for this game.

[Michael K]

Originally Posted by CaptCobrajet

I guess no one runs a 400 block in a 440 combo in Stock either, right?

I have heard this claim before. Always wondered how the correct 440 intake manifold could possibly fit the 400?