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Thanks to all of you, especially Maniac, that helped me with my installation.. I finally got everything in.. Had to order some new pipes from ATI and route things a little differently than they suggested but it's all in there and my car is running great.. Still has some problems.. Not getting the right fuel pressure at boost and it's running a little on the hot side but since it's the winter, my heater doesn't mind the extra temperature.. So far it's only been pushing about 4-5 psi of boost under WOT so I've gotta figure out why that is.. Also fuel pressure only gets up to about 45 psi under boost conditions too.. The instruction manual says 70-75 psi under boost conditions? Anyone else having this problem? The whining is a bit annoying but it's a small price to pay for the extra power.. I'm not going to complain too much. Anyone have any suggestions on how to tune it? I"m thinking I should get another gauge pod and put in a fuel pressure gauge and a air fuel meter.. Thanks again.
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Bruce Chang
ICQ #2992488
89 Firebird Trans Am
305 TPI, ATI Procharger Supercharger, Ported SLP Siamesed Runners, Siamesed Intake and plenum, Edelbrock TES, Hotchkis LCA's and Panhard Rod, GMPP 1.6 Roller rockers, B&M Shift Kit, Spohn Subframe connectors and driveshaft loop, Flowmaster Muffler, Accel Super Coil, Crane Hi-6 Ignition, Energy Suspension motor, tranny and torque arm bushings
Congrats on the install. Get some pics up somewhere, so we can see your handy work.
How much psi are you planning on running when its all said and done, and is this on a stocker 305?
Keep us posted!
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j.wolfe
_ ____ _
91 GTA L98 MSD K&N 195,000
Best time: 14.389@95.49 (VMP) Done with 193,000 miles and no engine work what so ever.
"...Deception..." Brandon Sloan * ...wounds heal and chics dig scars...
Welcome to our small, informal thirdgen ProCharger club!! I think you'll be pleasantly surprised at how hard your car will pull once you get the bugs worked out.
Not getting the right fuel pressure at boost and it's running a little on the hot side....
Do not go to WOT until you are absolutely certain your air/fuel ratio is correct. Air/fuel ratio is a function of fuel pressure. You definitely don't want your new investment turned into scrap of metal. More on this later.
I also noticed an engine temperature increase as soon as I installed my D1SC. That's because the IC blocks basically all the air that was allowed free passage to the radiator. And what air passes through the IC on the way to the radiator is now heated. I saw about a 15 degree increase in temperature. You might have to take any and all measures to keep your car from overheating in the summer. I've done a lot to my car. If you want details, just ask. This is a rather lengthy topic.
So far it's only been pushing about 4-5 psi of boost under WOT so I've gotta figure out why that is....
What diameter pullies and intake modifications do you have? 305 or 350? P1 or D1? At what rpm are you seeing maximum boost?
Also fuel pressure only gets up to about 45 psi under boost conditions too....
What was your pressure at WOT before installing the SC?
The instruction manual says 70-75 psi under boost conditions?
I assume you're using ATI's FMU? Sorry, but I can't help you here as I do not use it. Also, did you install ATI's in-line secondary fuel pump?
Anyone have any suggestions on how to tune it? I"m thinking I should get another gauge pod and put in a fuel pressure gauge and a air fuel meter....
I feel it's mandatory to have a fuel pressure and air/fuel ratio gauges. Begin tuning by knowing that your fuel pressure is not dropping off at WOT. It should increase. Once this has been confirmed, examine O2 sensor voltage (via air/fuel ratio gauge). It should be in the 850-900mV range (slightly higher is okay). I cannot emphasize the importance of these two points. Make absolutely sure you're okay here before tinkering with anything else.
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Willie
Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig) with 50-hp nitrous: 12.043 @ 112.86 mph.
ATI D1SC (10-psig): 12.056 @ 116.62 mph.
All stats are altitude corrected for 3,100 feet using NHRA's Altitude Correction Table.
Alright so a little background on my Firebird. It's a stock engine. I was going to put in an SLP cam but found out that the stock cam has 116 degrees of lobe separation and the SLP has 112 degrees so I'd rather have the 116 and live with the low lifts than put in 112 degrees and have the boost blow through. I hope I made a good choice there.. I had a valve job done as well as ported and polished the heads and intake. The intake is now siamesed and there are SLP siamesed runners and the plenum has been ported and matched to the siamesed runners. I know that the engine temp will increase because the aftercooler is in the way of the rad. I expected this. I also need to ground out the fan relays since the instructions told me to ground the fan relays except the instructions say to ground a green and white wire and my relays don't have those color wires. I'm calling ATI soon for advice. either that or I'll do some tinkering and figure out which wire is the signal and I'll just ground the suspect wire.
As far as I understand I have a P600. Max boost comes at about 4500 RPMs. Fuel pressure also increases as boost increases but not to 70-75 psi like the instruction manual says. If you're not using ATI's FMU, what are you using? I did install their fuel pump as well.
As far as I'm concerned, right now with 5 psi I'm loving it already. I want it to run the 7 psi that I've been told it's supposed to do, maybe 9 psi in the far future.. I'll take a roll of film of the install and hopefully get the pics up somewhere so ya'll can see my hack job.. Thanks for the quick replies and I look forward to meeting the informal procharger club when thirdgen puts together a nationwide gathering. Take care, all.
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Bruce Chang
ICQ #2992488
89 Firebird Trans Am
305 TPI, ATI Procharger Supercharger, Ported SLP Siamesed Runners, Siamesed Intake and plenum, Edelbrock TES, Hotchkis LCA's and Panhard Rod, GMPP 1.6 Roller rockers, B&M Shift Kit, Spohn Subframe connectors and driveshaft loop, Flowmaster Muffler, Accel Super Coil, Crane Hi-6 Ignition, Energy Suspension motor, tranny and torque arm bushings
I would assume you are using the ATI FMU, make sure that you have the vacuum/boost line hooked into the plenum, then make sure that the bleed screw on the FMU is fully closed (turn clockwise), this should give you a maximum rich condition. as soon as you start seeing boost your fuel pressure should start to rise along with it.
There are many other ways to add fuel to the engine besides installing the FMU, you can install a different ECM that has the means of sensing boost and allows the injectors to provide more fuel or you can install a Carroll Superfueler system (like Willie has), which has 3 injectors that mount between the throttle body and the plenum and are controlled by there own ECM.
As far as the amount of boost, the boost number is a measure of restriction pressure of the intake system, the less restriction that you have, the lower your boost will be for the same blower unit, the system that you have was designed to run on a STOCK engine with alot of restriction, but you have ported and polished and unrestricted your intake, so now you will not see the 9#'s of boost that the kit was advertised to produce. OR it could be something as simple as the belt slipping, look for signs of black belt dust on the face of the blower unit.
And as Willie suggested, you should have some means of monitoring your 02 sensor voltages and fuel pressure, the last thing you want is to go lean and have a melt down!
Greetings everyone I'm not sure if I'm too late committing on this thread. Can anyone please explain what are the biggest hurdles when it comes to installing the procharger kit? I am running the D1SC kit, with a bunch of upgrades. I am definitely willing to list everything if anyone is interested. I'm just trying to pick someone's brain who has more experience then myself in this department.
looking forward for any and all help thank you.
Greetings everyone I'm not sure if I'm too late committing on this thread. Can anyone please explain what are the biggest hurdles when it comes to installing the procharger kit? I am running the D1SC kit, with a bunch of upgrades. I am definitely willing to list everything if anyone is interested. I'm just trying to pick someone's brain who has more experience then myself in this department.
looking forward for any and all help thank you.
Welcome to TGO, your about 20 years to late
You would probably get more eyes on your question if you started a new thread.
I've got a PS1, been through a lot. How can I help?
I'm looking for some pointers on how to best support the application. What size fuel pump did you go with and do you have the Holley HP ecu? Also I have the Holley digital dash as well. What finite components did you do to make the system work. The only upgrade from this these pix is the tpis stealth ram intake. Everything else is as is.
Last edited by 87Darknight; Oct 13, 2023 at 09:46 PM.
I'm looking for some pointers on how to best support the application. What size fuel pump did you go with and do you have the Holley HP ecu? Also I have the Holley digital dash as well. What finite components did you do to make the system work.
If you're looking for fuel system upgrades I'd recommend you pickup a whole fuel system to support everything you want and more in the future. You can easily fit dual in tank pumps either 255 or 340 lph, -8/-6 PTFE lines and fittings, bigger injectors. Oh and make sure to install a fuel pressure sensor you definitely want one!!
Since you're running Holley EFI you can stage your second pump to come on at a given pressure or TPS position or both, No need for a Hobbs switch. You've got an HP ECU so you can go with either low or high impedance injectors depending on your power goals.
Your factory gauges won't work anymore but no biggie since you've got a digital dash. You can even do a fuel level on the digital dash so that can pretty much be your gauge cluster
