The flow increase due to the different fuel pressure is only about 5%. At 43.5psi, the SVO's flow 25.3 #/HR. The stock LT1 injectors are programmed at 24.9 #/HR..... not any real difference between them.

If you want to keep the duty cycle under 85%, you can't push the stock LT1 injectors over about 355 flywheel HP. Sounds like he should be closer to 32 #/HR (depends how many yadas he actually installed).

 

You are correct, I was thinking of LS1 injectors.

 

An LS1 injector will flow less when you run it at 43.5psi, not more.

 

Yes, but an LS1 injector is 28lbs on an LS1, thus putting the magic number 28 in my head where a 25 should have been...

my mistake, you are correct as always

 

hahaha... i guess it would make sense to go over all of the yaddas..

k&n fipk, 58mm bbk TB, pacesetter LTs, borla catback, U/D pulley (with alt O/D), CSR EWP, 1.6 rrs, stage 1 port pros heads, 230/236 .544 .555 114 cam and madz tune...

im pretty sure i covered everything... what kinda hp/tq do you figure thatll put me at?

and what would be the proper size injectors to get and can you go too big?

Also, should i go with an aftermarket fuel system (racetronix)?

can anyone think of any other reason the fans wouldnt turn on?

 

tutor tap..?

 

k&n fipk, 58mm bbk TB, pacesetter LTs, borla catback, U/D pulley (with alt O/D), CSR EWP, 1.6 rrs, stage 1 port pros heads, 230/236 .544 .555 114 cam and madz tune...

im pretty sure i covered everything... what kinda hp/tq do you figure thatll put me at?

I'll guess 430-450 flywheel HP... but I have no idea what "stage 1 port pros heads" are.

and what would be the proper size injectors to get and can you go too big?]

Multiply your estimated flywheel HP by 0.07 to get the minimum injector size.

0.07 X 450 = ~32#/HR

If you think you are closer to 500 flywheel HP, try:

0.07 X 500 = ~35#/HR

You can not go too large, as long as you don't get ridiculous. Running a 36# or a 42# injector won't hurt at the 450HP level, as long as its tuned for the correct injector size.

Also, should i go with an aftermarket fuel system (racetronix)?

Yes

can anyone think of any other reason the fans wouldnt turn on?

What temperature did madZ28 set the fan on/off temps at? Have you checked the reading of the coolant temp sensor in the water pump housing, using a scanner?

 

here are the specs port pros website gives for the stage 1 head setup:
Stage 1

Stage 1 Port work with flow sheets

1.940 Port Pros stainless steel swirl polished intake valves

1.500 Port Pros stainless steel swirl polished exhaust valves

Port Pros hydraulic valve springs

5-angle valve job-set valve stem heights-set spring installed heights-
bronze guide liners -surface-pressure test-new valve seals

Completely assembled ready to bolt on.

the fan problem has been going on through multiple PCMs, so i dont think its a tuner thing, and i havent scanned that sensor, but i will be tomorrow if all goes according to plan.. i found a burnt wire today that goes in the general area as the fan wiring, so that may be my problem

 

What flows do they claim? Those are basically small, stock valve sizes.... although that's what LE uses in the LE1 package. Most LT1 peak performance heads will go with at least 2.00 I / 1.56 E. Even the stock LT4 heads went with 2.00 I / 1.55 E.

 

idk, they didnt send the promised flow sheets, even after calling and asking for them.. to be honest, i wasnt too surprised with how much material was taken away either, but i figured im not a porter, idk what im talking about.. and it was such a hassle just to get my parts, that i just said whatever, and put it all back together (its my only vehicle)..

to be honest, i just try not to think about it. lol.

so i just jumpered the ports on the DLC, and my pcm doesnt even turn the fans on... i cant find any burnt wires, and all of the fuses and relays are good...

[edit] so the heads do make some difference.. i ran the car with it hooked up to his laptop and all that tuning goodiness (minus wideband) and it was flowing like 35 gps (?) more than his 353 lt1

 

TTT

does anyone know of any "problem spots" where wires might have been burnt/cut?

i dont see any of these wires/looms going near the headers really.. any other ideas?