JDUBB

Hey Guys,
Tunes pretty close. Here's an attachment of winaldl log. What do you think? Just breaking it in.
383, 54mm TBI with 90LB injectors running at 16PSI, RPM Intake, Etec 170 Heads, Comp Push Rods, 10:1 CR, Comp XFI cca-08-465-8 Roller Cam, Comp Magnum Pro Gold 1:6 Rockers, Eagle Forged Internally Balanced Kit, ATI (SFI Rated) Flexplate, 255lpr fuel pump, Built 700R4 Raptor, 3.73 Rear, full exhaust mid length headers.

xch3no2

I don't think you have 90pph injectors. All of the information on the web indicating 90pph injectors originated with the posting of incorrect information.

All of the information posted by reliable sources who actually flow the injectors indicate the largest injectors made by GM flow about 80pph.

Aftermarket manufactures will lie to sell their goods.

JDUBB

Yeah they are 90 lb. Bought them and TBody from dctrumpet part number 5xxxxxxx. Benched and flow matched.

xch3no2

Go ahead & post those flow numbers... I might try to help you understand.

Those with the greatest knowledge & experience have already determined the capability of those injectors. My own experience parallels theirs.

A little food for thought,
http://www.turbocity.com/default.php?cPath=16_30
http://www.fortunecity.com/rivendell...24/gm_inj.html
I hope RBob doesn't mind, read the bottom of the page.
http://www.dynamicefi.com/TBI_Fueling.php

Odd that your smallblock needs a 54mm TBI when I make over 450hp w/a 50mm, just sayin...

One more question before I decide to bail on your thread, xfi 265 isn't that an Ls cam?

JDUBB

I'll post the numbers if I can find the sheet that was sent with them it's been several months since I bought em. Also the cam is a cca-08-465-8, I type fast and the 265 that's what came to mind so it's actually advertised as 260int/270exh, dur @ .050 210int/ 218exh, lift .560int/.550 exh. Pulls great 1500-5500rpm, I haven't gone over 5500 yet but at 5500 it's still pulling so I think it will fall off around 6000rpms. Has a nice little lope, pulled up by a ***** today and needless to say he didn't have a chance LOL. Sweet combo though could not be happier! Anyway the point of the original post was what do you think about my initial data log.

JDUBB

Flow specs for injectors P/N 5235231: Fluid temp 72F- Test pressure 1 bar- static flow 218, 218- Pulsed Flow cc @ 2500 RPM 119.5, 118- cc/min @ 1 bar 872,872

xch3no2

Ok here is what I'll say, 1 bar pressure is 14.5 psi (14.7 by some?).

872cc/min = 83pph, that is your flow with the injectors static at 14.5 psi. Thats about 78.6pph at 13psi. You follow?

Bottom line, if those injectors flowed 90pph @ 13psi I would not have to use 50+ psi on them to try to feed my 480hp (more?) Rat.

Sorry, I haven't had time to review your log, busy with my own mind-melting study of EFI.