I put a NOS fuel pump on my car yesterday....It was running fine before with a stock pump and a 7psi pump from O'Reillys....now the car falls on its face when I spray it with a 250 shot(not detonating) It hits hard, then jerks really bad and wont rev much higher after that..WTF?? too much fuel pressure?? I have it set at 42psi now....could the stock pump be holding it back(can't keep up)when I change the jets to a 200 shot or so, it runs better, but isn't very as smooth after 4,000 RPM's or so...

Thanks alot guys,
-Scooba

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'93 Z/28 M6 3.73's_6point cage_orange with yellow pearl_RK sport GFX_SS hood_RK sport hi rise wing_clear corners_billet grille_ported heads/intake_5 angle perf. valve job_97'LT4 383 by SELF RACING_CALLIES stealth crank_OLIVER six inch rods_J.E.forged dished pistons_10:1 compression
OLIVER splayed mains_custom grind cc306_LINE BORED_BALANCED AND BLUEPRINTED_FASTCHIPS custom chip and ED Wright DYNO tune_EGR bypass_home made SFC's_home made short throw_home made LCA's_home made CAI
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Eibach Pro kit_ET Streets_Hooker ceramicoated LT's W/true duals and "H" pipe_Taylor Spriro wires_Autolite 104's_Aeromotive adjustable FPR_30# injectors,58mm TB, 1.6 comp pro magnum RR's
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N.O.S. wet system 300 shot
_ ______________________ _
PAXTON S591 w/12 LB pulley in the works (need to custom fab some brackets)

 

do you have a fuel pressure safty switch? if so the pressure may be dropping and alls you get is a whole lot of fuel and no juice.

 

Yes I do, but I disconnected it and ran the car again and it made no difference...

Thanks for the reply...
-Scooba

 

How did you change the fuel jet(s) to accomodate the increase in fuel pressure (I'm assuming you were running your wet fuel system at 7psi, and substituted the high pressure pump)?

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Fred
94 Formula A3+1: 381/TH400+OD/N2O

Advanced Tech Posting Guidelines
Detailed Mod's List
11.513@115.59 on motor; 11.162@127.67, 1.643 60' on a 125-shot. Going with a 275-shot this year

 

I didn't change them....what should I do?? How many sizes should i drop??

Thanks,
-Scooba

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'93 Z/28 M6 3.73's_6point cage_orange with yellow pearl_RK sport GFX_SS hood_RK sport hi rise wing_clear corners_billet grille_ported heads/intake_5 angle perf. valve job_97'LT4 383 by SELF RACING_CALLIES stealth crank_OLIVER six inch rods_J.E.forged dished pistons_10:1 compression
OLIVER splayed mains_custom grind cc306_LINE BORED_BALANCED AND BLUEPRINTED_FASTCHIPS custom chip and ED Wright DYNO tune_EGR bypass_home made SFC's_home made short throw_home made LCA's_home made CAI
-------------------------
Eibach Pro kit_ET Streets_Hooker ceramicoated LT's W/true duals and "H" pipe_Taylor Spriro wires_Autolite 104's_Aeromotive adjustable FPR_30# injectors,58mm TB, 1.6 comp pro magnum RR's
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
N.O.S. wet system 300 shot
_ ______________________ _
PAXTON S591 w/12 LB pulley in the works (need to custom fab some brackets)

 

changed jets back to a 150 shot yesterday....still same problem, but worse....car basically kills itself when i hit the button. WTF?? what jet size should I run on the fuel side, I really don't want to play the guessing game here. NOS said I could drop my fuel pressure or put another regulator on WTF?? that doesn't make any sense on a fuel injected car..

Later,
-Scooba

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'93 Z/28 M6 3.73's_6point cage_orange with yellow pearl_RK sport GFX_SS hood_RK sport hi rise wing_clear corners_billet grille_ported heads/intake_5 angle perf. valve job_97'LT4 383 by SELF RACING_CALLIES stealth crank_OLIVER six inch rods_J.E.forged dished pistons_10:1 compression
OLIVER splayed mains_custom grind cc306_LINE BORED_BALANCED AND BLUEPRINTED_FASTCHIPS custom chip and ED Wright DYNO tune_EGR bypass_home made SFC's_home made short throw_home made LCA's_home made CAI
-------------------------
Eibach Pro kit_ET Streets_Hooker ceramicoated LT's W/true duals and "H" pipe_Taylor Spriro wires_Autolite 104's_Aeromotive adjustable FPR_30# injectors,58mm TB, 1.6 comp pro magnum RR's
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
N.O.S. wet system 300 shot
_ ______________________ _
PAXTON S591 w/12 LB pulley in the works (need to custom fab some brackets)

 

Check your selonoids to see if both are working properly, check your fogger nozzle and jets, are both selonoids hooked to your fp safety switch or only the nitrous selonoid? Did you hook your vacuum hose back up to your fp regulator? Sounds like its getting to much fuel. If nothing else try removing the new pump to see if it makes any difference.

P.S. WATCH OUT FOR THOSE STOCK LT1'S!!!!


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THATS OK BRYAN, I'M GOING BACK HOME THIS WEEKEND AND I'LL HAVE MY PIT CREW TAKE A LOOK AT IT.......

P.S. MY ET'S ARE COMING BACK WITH ME, SO I'LL BE 2 CARS AHEAD ON THE BACK TIRES BUDDY..

(I TAKE IT YOURE WORKING HARD TODAY?)

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'93 Z/28 M6 3.73's_6point cage_orange with yellow pearl_RK sport GFX_SS hood_RK sport hi rise wing_clear corners_billet grille_ported heads/intake_5 angle perf. valve job_97'LT4 383 by SELF RACING_CALLIES stealth crank_OLIVER six inch rods_J.E.forged dished pistons_10:1 compression
OLIVER splayed mains_custom grind cc306_LINE BORED_BALANCED AND BLUEPRINTED_FASTCHIPS custom chip and ED Wright DYNO tune_EGR bypass_home made SFC's_home made short throw_home made LCA's_home made CAI
-------------------------
Eibach Pro kit_ET Streets_Hooker ceramicoated LT's W/true duals and "H" pipe_Taylor Spriro wires_Autolite 104's_Aeromotive adjustable FPR_30# injectors,58mm TB, 1.6 comp pro magnum RR's
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
N.O.S. wet system 300 shot
_ ______________________ _
PAXTON S591 w/12 LB pulley in the works (need to custom fab some brackets)

 

Was that last remark directed at me! And who is lt1lt1? And who is the "stock lt-1" he keeps refering to. I haven't been on the board in a while. I'm sorry to hear you are having so much trouble. I hope you aren't up their gettin whooped up on.

 

PLEASE BRING YOUR PIT CREW BACK SO THEY CAN RIDE IN MY CAR. I NEED MORE TRACTION!!!! BESIDES I WANT YOU TO BE ABLE TO SEE (A LITTLE LESS TIRE SMOKE IN YOUR FACE). JUST TRYING TO GIVE YA A FAIR RACE!!!

P.S. WATCH OUT FOR THOSE STOCK LT1'S.



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No, I wasn't referring to you Bryan Taylor, I was talking to Bryan Campbell (lt1lt1) He lives in this ****hole town in Wyoming with me....He has a slow 93 T/A with a few bolt ons.

And no I'm not getting whooped up on, I got beat once b/c my N2O solenoid quit working and I sprayed straight fuel and bogged the car down, but I fixed it now.

Also, I need some cheap 10's, mine suck bad....can you hook somthing up?? I'm coming back into town this Saturday, I'll stop by your house.

Later,
-Scooba

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'93 Z/28 M6 3.73's_6point cage_orange with yellow pearl_RK sport GFX_SS hood_RK sport hi rise wing_clear corners_billet grille_ported heads/intake_5 angle perf. valve job_97'LT4 383 by SELF RACING_CALLIES stealth crank_OLIVER six inch rods_J.E.forged dished pistons_10:1 compression
OLIVER splayed mains_custom grind cc306_LINE BORED_BALANCED AND BLUEPRINTED_FASTCHIPS custom chip and ED Wright DYNO tune_EGR bypass_home made SFC's_home made short throw_home made LCA's_home made CAI
-------------------------
Eibach Pro kit_ET Streets_Hooker ceramicoated LT's W/true duals and "H" pipe_Taylor Spriro wires_Autolite 104's_Aeromotive adjustable FPR_30# injectors,58mm TB, 1.6 comp pro magnum RR's
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
N.O.S. wet system 300 shot
_ ______________________ _
PAXTON S591 w/12 LB pulley in the works (need to custom fab some brackets)

 

SLOW!! YOU MUST HAVE GOTTEN BEAT BAD!! I'M SORRY! WITH MY HELP, YOU CAN BE FAST TOO. BEWARE OF SCUBA STEVE IN THE NEAR FUTURE!!!



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