I have a 1996 GSR w/ a 1995 B18C1 OBD-1 Motor in it. The car is equipped with an LS Tranny w/ Quaife LSD. I also have an T3/T4 AR .50 with an HKS wastegate that I am told is no longer made ( also told that it is twice the size of any current wastegate, i dunno ). 3" Thermal w/ no cat, Greddy intercooler, RC 440 cc Injectors, Han Throttlebody, Skunk2 Intake Manifold and the bottom end is decked and sleeved w/ all internals replaced for high boost. I am running the stock valvetrain & computer with the aid of an Apexi S-AFC. I am told my motor will hold 22 psi w/ proper fuel and tuning. I am currently running an half bar. Does anybody think it is safe to run around on an Full Bar with my current setup? I just ordered an AEM Fuel Pressure Regulator and Fuel Rail, Does anybody know the proper fuel pressure at idle and WOT for my setup? Should I upgrade to 550 or 600+ cc Injectors to go to 1 Bar. I have mixed feeling on the LS tranny setup, but the car does stay in VTEC when I shift at the redline. Also the car doesnt like to VTEC unless it is floored, it kinda spitters and hesitates, is that a result of running the factory computer? I do not feel like my car has the power that it should have, does anybody have an estimate of how much power my car is making? Any and all feedback is welcome and appreciated.

Thank You!

Fuel pressure would depend on your AF raito

Damn, all those frekin mods and a stock computer. First of all thier will be some people saying that you should not turbo a B18 (i'm not saying that). Get Either a Jet Upgrade, Or Hondata. Some may even say an Apexi Fuel Computer. I Dont know much about those. At the high RMP end, thier is no way the stock ECU will do the right thing with all those aftermarket parts. definitly get a pro to tune the ECU, maybe buy a Hondata, and get a specialized tuner to fix it. I am personally running 550CC and I dont even have a DOHC. Bigger injectors may be suggested in the near future. Your motor should hold all that boost. I say leave your top end (valvetrain) stock untill it breaks. GET a fuel pressure regulator, if you got $150 laying around get a fuel rail. What do you mean by "half bars, ect".
Watch those drive axels! Lets see some pics. I bet it is a mean ass car, at least the engine.

Oh ya, usually you will only be able to use a small range of Pressure (EX:55-60 psi). that is why they call it Test and Tune. Other wise your car may not even start, I am at about 50 psi with my big aftermarket fuel pump.

P.S. You are probly making some good fucking power. it is nearly imposible to tell just by reading though.

The car should be making good power, I have been around Turbo Buick's all my life and own an 87 GNX w/ globs of torque, I feel my car is nowhere near as fast as it should be. I have the fuel pressure reg and rail on the way. Does anybody think It is safe to run 1 Bar ( 14.7 PSI ) with this setup?

The car is in need of some paint, It looks bone stock ( how I like it ) slammed and all black ready for combat. I will take some digital photos this weekend and post them for you

The car is in need of some paint, It looks bone stock ( how I like it ) slammed and all black ready for combat.

Thats what I like to hear.
14 PSI of Turbo Boost, Hell Ya it will work!!

The car is in need of some paint, It looks bone stock ( how I like it ) slammed and all black ready for combat. I will take some digital photos this weekend and post them for you


I am real sorry to be of subject but what number is your GNX? Are you going to bowling green for the nationals this year?

I have only been to the Ntas once a long time ago. The car # is 352 and she has under 11,000 miles. You work at Cat's proving ground!? no shit, I have an excavaing company, I envy you. Were about the same age too. Me and my family are buick people. I have the GNX, Dad has a Yellow GSX, Mom has a 71 Stg 1 Conv 1 of 9 and a couple more GS's hiding. My best time on the GNX is 12.05 @ 112 w/ D.O.T. Radials @ 18LB.

Dependant on the A/F ratio, definatley.

I have a 1996 GSR w/ a 1995 B18C1 OBD-1 Motor in it. The car is equipped with an LS Tranny w/ Quaife LSD. I also have an T3/T4 AR .50 with an HKS wastegate that I am told is no longer made ( also told that it is twice the size of any current wastegate, i dunno ). 3" Thermal w/ no cat, Greddy intercooler, RC 440 cc Injectors, Han Throttlebody, Skunk2 Intake Manifold and the bottom end is decked and sleeved w/ all internals replaced for high boost. I am running the stock valvetrain & computer with the aid of an Apexi S-AFC. I am told my motor will hold 22 psi w/ proper fuel and tuning. I am currently running an half bar. Does anybody think it is safe to run around on an Full Bar with my current setup? I just ordered an AEM Fuel Pressure Regulator and Fuel Rail, Does anybody know the proper fuel pressure at idle and WOT for my setup? Should I upgrade to 550 or 600+ cc Injectors to go to 1 Bar. I have mixed feeling on the LS tranny setup, but the car does stay in VTEC when I shift at the redline. Also the car doesnt like to VTEC unless it is floored, it kinda spitters and hesitates, is that a result of running the factory computer? I do not feel like my car has the power that it should have, does anybody have an estimate of how much power my car is making? Any and all feedback is welcome and appreciated.

Thank You!

you definately have a good setup going but there are probably some things that should be improved before cranking up the boost... you didn't mention about your fuel pump so I imagine it's your stock one in which case you will need to replace that if you run 1 bar of boost, go with either holley or walbro in tank pumps... the 440cc injectors should be able to handle the 1 bar but definately keep an eye on your A/F ratio at first to make sure you're not running lean... your ecu setup also should probably be changed unfortunately, I'm not sure on the exact percentage but I know the S-AFC can only adjust the fuel load to a certain amount over stock since it is only a piggyback unit, I wanna say no more then 40% over stock but don't hold me to that exact number... I wouldn't recommend sending your stock ecu out to JET, have heard to many disappointing results with it, I would go with either hondata or AEM EMS, but be prepared to spend some cash, stuff is far from cheap, hondata will cost less then the AEM but still not inexpensive... you should also get a wide band O2 sensor to make sure you get the most accurate reading of your A/F ratio for proper tuning... as far as the VTEC acting funny yes that could be caused by the ecu, your car is meant to see boost so your ecu isn't prepared to recieve it, you might also check your vtec solenoid.