turbo

I made 652hp with a silverbullet, stock head, stock cam, 12mm pump, stock lines. What are you going to do with the truck?
 
At the time it had ddp4s, silver bullet, benched 12mm pump, timing was at 18*. 022 dvs. Arp studs. 652 1191
 
Like tmoney says, its in the tune. That turbo is good for some big power. Some common rails have made really big numbers with that silver bullet.
 
if you like big numbers and are gonna want big twin numbers i would go with a 64mm secondary, somethin like a 64/71/13-14, then put an s480 under it later, that would be good for lots or ponies and have better street manors than you have now.
 
If ya want to do twins my braddah, then you should look into a 62 over a S475 for the cheap fun route, can make a good bit of power and spool quick and have good top end. You could go alot smaller than your SB and still make the same power.
 
if i can make bigger with what i got then ill keep it and get the pump benched i just need to find a shop in az to benched
 
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