L98 Aluminum headsvs Vortec Cast Iron heads

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Jun 29, 2003 | 04:25 AM

#16

Dirt Reynolds

Registered User

Joined: Jan 2003

Posts: 398

From: Surrey, BC

Quote:

Originally posted by Chuck!
Im putting in a walbro 255 whenever I can get home and I'd like to run about ~19 psi with 80 pph injectors, we'll see how that works

19psi is no problemo for the factory GM TBI injectors. Those things are tough as nails. I've heard of some guys running 'em up as high as 30+ psi. My guess is your right - with the Vortecs and LT1 cam you'll definitely need more fuel. You'll also need a good set of rear tires - those TBI engines can make some torque.

Dave

Jun 29, 2003 | 09:26 AM

#17

Chuck!

Registered User

Joined: Aug 1999

Posts: 2,610

From: Cincinnati, OH

Yea, a dude on thirdgen is running his 65s at 29 psi! Insane. Im pretty exicted to see how the combo comes together when I throw some more fuel at it and get a 2" tbi unit.