I want to build a 383 for my 91Z28 with Vortec heads, SDPC intake, and the LT4 hot cam. Will 30# be too much for the motor. Thanks, Brandon

 

I'd say yes... You only need 30lbs if you're running a blower or nitrous. Try 24lbs.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
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I'm thinking 30# injectors would be good for close to 500Hp, depending on fuel pressure. Probably too big for your application.

 

30lb injectors may be a bit big for it, but it leaves room for adding more. don't expect to run them without a custom chip though. be too rich otherwise. require some tuning too, but they can be made to work.

 

If you expect to drive this thing on the street, you'll be quite disappointed with 30#-ers. 22's would be adequate for a street/strip engine, 24's would only be required for a totally tweaked setup.

Adjustable regulator and chip a must.

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82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 3.08 open, cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, World 305 heads, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.