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-   -   426 Hemi Replacement Block? (https://classracer.com/classforum/showthread.php?t=35720)

nolongerracing 09-03-2011 11:58 AM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by Steve Stasko (Post 279231)
I was told by NHRA Tech today that I have to run an original block in Super Stock, that there is no replacement. My question is though, aren't the AH guys running new Mopar blocks?

I am (was?) building a '66 Coronet for SS/EA, and the blocks were the same as the '68 blocks, so why can't I run a new block?
I believe you have been miss informed. I don't think there is a superstock hemi out there that runs a 45 year old block. Any block that Mopar sells that they consider a replacement block is legal for superstock....P5155072...P5153942....and the P5153943. The 943 block allows the engine builder to put the lifter bore any where he wants to!

nolongerracing 09-03-2011 12:01 PM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by BlueOval Ralph (Post 279420)
From what I have heard is that World Products makes the Hemis replacement blocks for Mopar and they have cast some Hemi short deck blocks (383 deck hight) that the Hemi Shoot out cars are using. Anybody heard about this???
This is true....no rule that says you have to have "stock" deck height in superstock.

Phillip marvetz 09-03-2011 12:19 PM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by nolongerracing (Post 280053)
I believe you have been miss informed. I don't think there is a superstock hemi out there that runs a 45 year old block. Any block that Mopar sells that they consider a replacement block is legal for superstock....P5155072...P5153942....and the P5153943. The 943 block allows the engine builder to put the lifter bore any where he wants to!
O.K.So what about in stock?

nolongerracing 09-03-2011 12:38 PM
Re: 426 Hemi Replacement Block?
 
Stock can use the first 2 part number blocks...must also maintain a close to stock deck height. The max stroke, max rod length and min compression height of the piston keeps you from using a short deck block.

Steve Stasko 09-03-2011 11:23 PM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by nolongerracing (Post 280053)
I believe you have been miss informed. I don't think there is a superstock hemi out there that runs a 45 year old block. Any block that Mopar sells that they consider a replacement block is legal for superstock....P5155072...P5153942....and the P5153943. The 943 block allows the engine builder to put the lifter bore any where he wants to!
That is what I thought and exactly what I said to the gentleman on the phone. (I called Glendora.) When I stated about the lifter bores and etc., I was told no such thing happens. The gentleman on the phone said that there were no accepted replacements for the Hemi and I had to run an original block.

Bob Pagano 09-04-2011 08:44 AM
Re: 426 Hemi Replacement Block?
 
Steve call Dave Ley and see what he says, no way all the old hemi cars are using old blocks, you cant even find a decent one. Even the fords have a aftermarket block for stock. And people wonder why there is so much bull that goes on with nhra, no one can give the same answer twice.

Bob Mulry 09-04-2011 08:19 PM
Re: 426 Hemi Replacement Block?
 
FYI,

Maybe that replacement block is included in NHRA's Secret Rule Book that is only available to a chosen few.....

If you let the cat out of the bag about the Secret Rule Book you automatically go on Double Secret Probation for the rest of you NHRA racing career....

Please don't forget about the Secret Handshake that is used by the chosen few.

Wink, wick, nod, nod.

Bob

X-TECH MAN 09-04-2011 08:39 PM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by Bob Pagano (Post 280230)
Steve call Dave Ley and see what he says, no way all the old hemi cars are using old blocks, you cant even find a decent one. Even the fords have a aftermarket block for stock. And people wonder why there is so much bull that goes on with nhra, no one can give the same answer twice.
Travis Miller can help also if you cant reach Dave.

Phillip marvetz 09-04-2011 09:50 PM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by nolongerracing (Post 280053)
I believe you have been miss informed. I don't think there is a superstock hemi out there that runs a 45 year old block. Any block that Mopar sells that they consider a replacement block is legal for superstock....P5155072...P5153942....and the P5153943. The 943 block allows the engine builder to put the lifter bore any where he wants to!
2468330-m?

nolongerracing 09-04-2011 10:04 PM
Re: 426 Hemi Replacement Block?
 
Quote:
Originally Posted by Phillip marvetz (Post 280425)
2468330-m?
That block is legal....non siamese bores...part # P5007668AB.


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