Injector Sizes

[Czop418]

Hey guys im wondering about buying bigger injectors for my Lt1. Im still building it as we speak and was wondering about injectors sizes. Its a stock displacement lt1. The Mods are :

Cartek Ported Stock heads with Stock Size valves.
Gasket Matched Ported Intake Man , With 52mm TB.
Edelbrock Cam Specs:

Duration Advertised 286° Intake/286° Exhaust
Duration @ .050'' 218° Intake/218° Exhaust
Lift @ Valve .525'' Intake/.525'' Exhaust
Lift @ Cam .350'' Intake/.350'' Exhaust
Lobe Separation Angle 112°
Intake Centerline 112°
Intake Timing @ .050" Open 3° BTDC
Close 41° ABDC
Exhaust Timing @ .050" Open 41° BBDC
Close 3° ATDC


Also Im going to running 1.6 ratio roller rockers and the cam is speced on a 1.5 ratio.
Also other Mods include CAI , Headers, Borla Exhaust


So what do you guys think. Bigger Injectors and Any Hint on what sizes ?

[LTb1ow]

30# SVO's are a safe upgrade. Relatively cheap too.

[JL8Jeff]

30lb SVO's might be a little too much and need some decent tuning. I ran a Powerdyne 4.5lb supercharger on my old 93 Z28 with some 24lb SVO's and it ran great with an out of the box SLP chip. The SVO's are rated at less fuel pressure so the 24's work out to more like 28-30 lbs with the LT1 fuel pressure. The 30 lb SVO's work out to like 38-40 lbs with the LT1 fuel pressure. Your combination isn't too radical so the 24's might be right for now. If you go with more upgrades in the future then you could need some more injector. But either way if you make big changes you will need some decent tuning to work with either one of those injectors.

[Czop418]

Yea i was also looking at those injectors i was also wondering what cam i should run i have 2 the edelbrock and this comp cams. The specs are:

Intake Exhaust
Vavle Adjustment HYD HYD
Gross Valve Lift .576 .600
Duration @ .006 Tappet Lift 293 299
Vavle Timing Open Close
@ .050 Int: 7 BTDC 55 ABDC
exh: 58 BBDC 10 ATDC

@114.0 Intake Cneter Line

Intake Exhaust
Duration @ .050 242 248
Lobe Lift .3600 .3750


Whats your guys opinion?

[sweetbmxrider]

big cam, what valve springs do you have? that thing is going to want to rev pretty high too.

i wouldnt go with a cam that big without the heads and intake being ported really well, call up Lloyd Elliott and see what he can do for you. custom grind is always better then off the shelf

[JSPERFORMANCE]

Originally Posted by JerzLT1

i wouldnt go with a cam that big without the heads and intake being ported really well, call up Lloyd Elliott and see what he can do for you. custom grind is always better then off the shelf

Not always..

[Czop418]

Well the heads are ported pretty well. They flow about the same as a le1 head. And The manifold was ported by me so its so-so. And I have crane springs which i can only use for the edelbrock cam , becuase the max lift for the springs is around 570. So i would need new springs probably bee-hive 918's. Also i didnt tell you guys this isnt a DD. Its a sunday cruiser that i can take to meet's and the strip.Also Everything in the top end is brand new.