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Discussion Starter #1
I currently have a 381ci sbc in a mustang actually just got done with drag week. Car ran without any problems actually got 2nd place to a really fast pinto! I now have a gt4788 turbo on it I just want more! Thinking of going with twin 6765 billets or the 76mm billets. With the gt4788 on it it only makes 24 psi on kill and I just would like to be able to push it to 30-35 psi if I need to! The heads are afr 210's cam is .630 .630 252 248 on a 116. I am just worried that if I put 76's on it it will not spool for crap! compression ratio is 8.75-1 bore is 4.020 stroke is 3.75! Thanks for your info!
 

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What numbers you currently running at what lbs?
 

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Discussion Starter #5
The fuel is E85 and the car weight is 3800. It makes 920 to the tire on a mustang dyno at 24 psi. At 20 psi it runs 8.90's at 154 mph.
 
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