Mopar 440 racers - time to legalize that shortblock!

[SSDiv6]

Originally Posted by Lynn A McCarty

Sounds like "Cross Breeding" to me! Specifically stated in the rule book for Super Stock and Stock.

Lynn

Illegal for Stock, but in SS you can run any intake as long the carb is located in the OEM position. You also adapt any intakes with spacers. The Smith brothers (Pro Trans), ran a Chevy intake, with adapters, in the SS 383/Cuda for many years.

[RocketBlock]

Originally Posted by SSDiv6

In Stock class, as long as you run the same OEM material and stroke as the engine you claim, using a crank in the same family is acceptable. As an example, using a cast crank within the different years of a Chevy small block, as long the stroke is identical, it is okay. However, using a forged crank in an engine that had a cast crank is not acceptable.

Incorrect. 440 crank is in the RB family, 413-426W-440 engine size, 2.750" journal size as. RB family as defined by Chrysler.
400 block is in the B family. 361-383-400 engine size as allowable in NHRA competition (other variants predate NHRA allowance for competition). B family as defined by Chrysler.

You can swap a cast crank for a forged crank application as long as the part is OEM and part of the same family. Example. You can use a 396 cast crank from a 265 horsepower Impala in your 375 horsepower Camaro engine for a weight savings. You could also use the standard small bolt rods. These are direct fit, same family applications. Truck crank, boat crank, it would not matter.

Again, "no crossbreeding of parts allowed". Also, "lightening of crankshaft other than normal balance job prohibited" Note: Per NHRA in SS you can turn down main and rod journals as much as you like.


Yes, any intake you can come up with allowable in SS as long as same configuration.

[SSDiv6]

Originally Posted by RocketBlock

Incorrect. 440 crank is in the RB family, 413-426W-440 engine size, 2.750" journal size as. RB family as defined by Chrysler.
400 block is in the B family. 361-383-400 engine size as allowable in NHRA competition (other variants predate NHRA allowance for competition). B family as defined by Chrysler.

You can swap a cast crank for a forged crank application as long as the part is OEM and part of the same family. Example. You can use a 396 cast crank from a 265 horsepower Impala in your 375 horsepower Camaro engine for a weight savings. You could also use the standard small bolt rods. These are direct fit, same family applications. Truck crank, boat crank, it would not matter.

Again, "no crossbreeding of parts allowed". Also, "lightening of crankshaft other than normal balance job prohibited" Note: Per NHRA in SS you can turn down main and rod journals as much as you like.


Yes, any intake you can come up with allowable in SS as long as same configuration.

Yes, that is exactly why I meant; I consider the RB a different family from the B engine.

[herbjr]

Rocket post with your real name and I'll continue this discussion.

Herb McCandless Jr

[Jeff Teuton]

I think the 400 is ok in ss, but not stk. I have been wrong before so don't swear on it.

[Lynn A McCarty]

Originally Posted by SSDiv6

Illegal for Stock, but in SS you can run any intake as long the carb is located in the OEM position. You also adapt any intakes with spacers. The Smith brothers (Pro Trans), ran a Chevy intake, with adapters, in the SS 383/Cuda for many years.

We arent talking about the intake, we are talking about the reason why you need the 383 intake. Arent they using a 400 block instead of a 440 block taking about 0.800 inches off the piston height? Isnt that the definition of cross breeding?

Pontiac made a 9.200 deck block that with a 400 we could do a very small crank and a very small piston skirt. We were told that is illegal. Several SBC guys I know say they are going to build a short deck 400 since their rods are like 5.35 inches. Wouldnt that be a killer combo too? Did NHRA allow that?

I dont blame the BBM guys for doing it, it is just that if one group gets it then everyone should. I could only do about 0.200, but a 428 could do about .400, and a 400 could do about 0.750.

Lynn

[RocketBlock]

Originally Posted by herbjr

Rocket post with your real name and I'll continue this discussion.

Herb McCandless Jr

But there is nothing to discuss. No grey area. Tech needs to enforce the rules as they are printed. I'm told that is in the works. If not, just as Lynn McCarty said, open it to everybody.

[Chris Hill]

Hell, a blind man can tell a 440 block from a 400 block.

Rocket, I assume your talking about stock. If the stock rod length is used and main diameter is same, a 400 block as a 440 is proper reading of the rule book to me for SS.

[RocketBlock]

Originally Posted by Chris Hill

Hell, a blind man can tell a 440 block from a 400 block.

Rocket, I assume your talking about stock. If the stock rod length is used and main diameter is same, a 400 block as a 440 is proper reading of the rule book to me for SS.

Did you read the specifications provided to you? Did you read the part about engine families? Did you read the rules violations? Go back over those items and then get back with your interpretation. Thank you.

[herbjr]

Chris we know each other from 20 years ago. Dont give to much info as soon as Rocket tells his real name Ill chime back in. He is in left field. And yes a Ray Charles could tell the difference between the two blocks. Can you Rocket without tools just your eyes.

Herb Jr