Visit The Dirt Forum for More Information

Author Topic:   gm heads
Racer13T
Dirt Full Roller

Total posts: 46
posted August 24, 2003 07:32 PM  
i have gm heads casting # 3947041 was wanting to know if they are high performance or regular heads any help appreciated

BK19
Dirt Freak

Total posts: 477
posted August 24, 2003 07:40 PM  
thanks for the info i got dq'ed now i know why.they want u to run 441 493 and heads like that, again thanks

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 24, 2003 08:38 PM  
do they make that big of a difference if u have stock 396 420 cam?or do u have to use a bigger cam to get the power out of them?i guess i will save them for a sportsman since they have no head rule thanks

Raz_900
Dirt Forum Champ
Total posts: 635
posted August 25, 2003 08:38 AM  
The 041's would raise compression 1 full point (or more) over heads w/76cc chambers. That alone is worth 4%-5% power (torque and HP) across the board.

[This message has been edited by Raz_900 (edited August 25, 2003).]

Racer13T
Dirt Full Roller

Total posts: 46
posted August 25, 2003 01:29 PM  
thanks for the replies this site rocks!! this is all new to me but i am learning unfortunately the hard way sometimes lol

[This message has been edited by Racer13T (edited August 25, 2003).]

Back to the Archives