please help me avoid a costly mistake!so far i have 2 telling me to go with 30lb and 2 with 24 lb so i'll let you guys decide for me,heres my setup l98 stock bottom and cam afr heads,1.6 rockers and ported plenum and base,paxton sc putting out 6 psi boost and slp 1-3/4 exaust.i.m currently running no fmu and cant seem to get the mv over 775 at full throttle.so what do ya think i should do before this thing gernades!
thanks

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1990 Trans Am,350 TPI(L98),WS6suspension ,bridgestone RE71's /245/45/zr16
paxton supercharger, alston sfc's,msd 6AL-BTM,
8.5 superconductor wires SLP 1-3/4 headers,duel cats,3"slp exaust, lakewood LCA's,T.B.Bypass
160 degree stat,alum driveshaft,fiberglass wing, secret mods

"if you cant win fair CHEAT"

[This message has been edited by blowen90ta (edited July 30, 2000).]

 

Going with 30lb injectors will make you run incredibly rich down low, but if you have a high stall speed, and low rear end gears then thats not too much of a problem, cuz you will only use your low RPMs in dayily driving. But, I don't think that the 24s would lean it out up high, unless you are going over 6500RPM, go with the 24s.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission

Current Mods: Edelbrock TES Headers, Hooker Cat-Back System, Performance Resource Chip, 160* Thermostat, Accel 8.8mm Ignition Wires, K&N high flow air filters, gutted air box, gutted MAF sensor, Throttle Body Coolant By-Pass, Homemade Ram-Air, Falken ZIEX Z-Rated Tires.

1/4 mile times without chip:
Best ET: 15.7 @ 89MPH
Best Corrected ET: 14.5 @ 96MPH

 

since you are supercharged, i'd personally recomend the 30lb injectors.

 

i

I'm going to use 30 lb for my car (when i get it back from the tranny shop)

 

30lb are definitely the better choice for your setup. However, you will be very very rich down low. The only way to fix this is with a custom PROM that is made by somebody specifically for your car. Changing your Fuel pressure will not solve the problem of being too rich down low because once you get it leaned out enough to run OK at idle then you will be lean at WOT.

Where do you live? I burn chips and I could make one specifically for your car. E-Mail me instead of replying to this post.

tim

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TRAXION's 1990 IROC-Z
Best Time = 12.587 @ 107.97mph (1.710 60ftr) on the long runner setup.
All Natural. No Force. No Drugs. Stock Bottom End.
Gunning for NA 11's with the MiniRam II and Hooker LT Headers.

 

not a tpi espert by any means, but for what i know i'd go with the 30's. i know of several people with similar set ups running 30's.

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ICON Motorsports

 

guess it looks like 30lb injecters and a custom chip is in the works.

anyone else?

 

Okay experts,
I just put a deposit on a fully ported Miniram with 58mm throttle body and balanced 30 lb injectors.

I have in my garage, on the engine stand, a 4-bolt main 383 block with 5.565" con rods, cast crank, and forged pistons. I also have a set of roller retrofit lifters for the engine, but have not yet picked out the EFI computer, cam, or cylinder heads.

How would I best utilize the miniram with said shortblock? This will back up a 700R4, be normally aspirated, and will rev to 6250 RPM. Would AFR 190's be the best choice? How about cam? .540 inches of lift, 230 degrees duration @ .050" ??

Should I go FP performance, so that I can individualy trim each injector's pulse width?

What do you think?


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Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines,
5-point racing harness, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Speed-sensitive steering conversion, underdrive pulleys, Crane Hi-6 & more. 1.05g skidpad verified.

 

If you have the means... I would do it.
That FP setup is awesome.