1989 Iroc with 350 tpi and Paxton issues
#1
1989 Iroc with 350 tpi and Paxton issues
I just purchased a 1989 Iroc from the Family of the now deceased owner. I know little about the history of the engine or the tuning.
The engine appears to be a reman block from aarons automotive in MO , there is a tag on the side of the block with a serial number.
The heads are edelbrocks , the intake has non oem runners , car has headers and exhaust , car has a cam , holley throttle body , paxton sn 2000 blower , red injectors and a billet rail with adj regulator.
The problem is the car runs extremely rich once warm and the idle rises from the blower pushing the throttle blades open? Car came with a new grantelli adj mass air and a shop bill of sale saying it needs installed along with two vacuum canisters for the brakes?
Something is not right because the engine does not pull vacuum at idle , its right at 0 hg or even pos pressure?
I am going to take pics and come back with more information.
Whats the deal with this supercharger system doing this?
The engine appears to be a reman block from aarons automotive in MO , there is a tag on the side of the block with a serial number.
The heads are edelbrocks , the intake has non oem runners , car has headers and exhaust , car has a cam , holley throttle body , paxton sn 2000 blower , red injectors and a billet rail with adj regulator.
The problem is the car runs extremely rich once warm and the idle rises from the blower pushing the throttle blades open? Car came with a new grantelli adj mass air and a shop bill of sale saying it needs installed along with two vacuum canisters for the brakes?
Something is not right because the engine does not pull vacuum at idle , its right at 0 hg or even pos pressure?
I am going to take pics and come back with more information.
Whats the deal with this supercharger system doing this?
#3
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Car: 88 gta
Engine: 350 tpi
Transmission: 700r4
Re: 1989 Iroc with 350 tpi and Paxton issues
How did you fix it? I am in the proses of installing a sn2k.
#4
Re: 1989 Iroc with 350 tpi and Paxton issues
Well for now as a crutch I installed the adjustable mass air that came with the car , was in the backseat new in a box, and that helped it from running so rich and picked up power but it still needs tuned. I am guessing PROM and wideband.
What is the normal thing to do , is it worth sticking with mass air?
What is the normal thing to do , is it worth sticking with mass air?
#5
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Car: 88 gta
Engine: 350 tpi
Transmission: 700r4
Re: 1989 Iroc with 350 tpi and Paxton issues
What most ppl do is switch to MAP, and learn to tune. Steep learning curve there. I think I will be doing the same as you. Ajustable maf, and a fmu. Did you run a second pump and the meth injection?
#6
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Car: 88 gta
Engine: 350 tpi
Transmission: 700r4
Re: 1989 Iroc with 350 tpi and Paxton issues
Also get a af reader, even if it is a cheap one that will conect to your NB-O2.
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1989, 350, 350tpi, aarons, auto, automotive, camaro, engine, irocz, paxton, sbc, supercharge, supercharger, superchargers, tpi