TORCHD 02 TA

iTrader: (39)

I am in the market for some 42# injectors. Just curious, is there a difference between Lucas, FORD (SVO), Delphi, Racetronix?

Also if the injectors are flow matched what kind of numbers would i be looking for? You obviosuly want all the injectors to be flowing the same rate. But again what kind of flow numbers are good? and what are bad?

FICINJECTORS

iTrader: (30)

Flow #'s are dependent on the size of the injector. Flow matching makes sure that all 8 flor the same amount of fuel.

There are Several differences between them all, the Lucas, SVO (Bosch) and Delphi are all completely different designs.

42# injectors could be quite overkill from what I'm seeing in your sig. What HP do you have and is it an auto or manual?

TORCHD 02 TA

iTrader: (39)

I know that flowmatched the all the injectors are flowing the same amount of fuel, my question was what kind of numbers would i be looking at? What should 42# injectors flow when flow matched?

My duty cycle with stock injectors was at 98%

Here is my mods w/ RWHP

Before Cam: 331 RWHP / 340 RWTQ

After Cam: 404 RWHP / 375 RWTQ

SAE Corrected: 415 RWHP / 378 RWTQ


2002 Trans Am M6

Engine
TSP Cam: 228/232 .588/.595 110+4 | MTI Lid | K&N w/Removed Air Silencer | WS6 Lower Air Box | Home Made Ram Air | P&P TB | TB Body By-Pass | Bump Stop Mod | 160 T-Stat | ASP Pulley
Exhaust
QTP LTs | Custom 3" O/R Y Pipe | Flowmaster Merge | GMMG C/B
Driveline
Pro 5.0 | Textralia Z Grip

FICINJECTORS

iTrader: (30)

42# injectors will flow 441cc per minute @ 3 bar.

Using SAE corrected HP and compensating 15% loss through the manual I get 483CHP

At that power level you will need a 36lb injector @ 3 bar to support it.

Now the LS1 has a 4bar fuel pressure, so you will need an injector rated at 32lb to get 36lb of flow @ 4 bar.

I have brand new Bosch Design III's in 32lb, flow matched with viton o-rings installed for $320 for the set of 8.

I also have our rebuilt design III Bosch in 32lb, flow matched, viton o-rings installed, and a 3 year no questions warranty for $239 for the set of 8.

TORCHD 02 TA

iTrader: (39)

I am little new to this side of fuel injection. What does 3 bar and 4 bar mean? I know that the LS1 has higher fuel pressure, but i don't know why...

I jsut feel better knowing that i have 42# injectors. B/C i will be doing H/I.. More in, you will need more Fuel to burn

FICINJECTORS

iTrader: (30)

3 bar is 43.5 psi, 4 bar is 58psi

42's will flow 50 @ 4 bar.

If you looking for headroom, I wouldn't recommend much over a 36.

a 36lb injector on a 4 bar rail pressure will support over 520CHP

TORCHD 02 TA

iTrader: (39)

how do you calculate that fromula for 42# injectors?

on a side not, in the spring i am adding 85mm MAF and 85mm Lid

FICINJECTORS

iTrader: (30)

You should still be fine with the 36's

nahasapeemapetalon

iTrader: (9)

Go to the sticky in this section and type in your information.
Most injectors are rated at 43.5psi so type in 58psi which our cars run at. That 3bar and 4bar talk was confusing at first, 1 bar =14.7psi=1atm. I am not used to that being using in fluids but nonetheless, #42lb injectors are actualy about #50 injectors at our fuel pressure. So 36# are prly closer to #42lb/hr of flow at 58psi.