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Old 07-11-2003, 05:09 PM   #1
1jimmy__d
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Default need to know within the next hour!

what to set my fuel pressure at with a 75 shot of nitrous using the 5115 kit. i am going to a guys house and want to be sure what the pressure should be at. i am using the bbk FPR along with the mods in my sig. i have 30# injectors with the holley sytemax kit. doeas 40 sound right at idle? please help ASAP if you can. Thanks,

jim
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90 lx hatch, holley systemax II kit, rebuilt 302, BBK 155 lph fuel pump, pro M bullet mass meter wtih BBk cold air intake, 30 # injectors, 70 mm TB, jacobs ignition system, edelbrock water pump, BBk longtube headers with h-pipe, flowmasters, b&m ripper shifter, 3.55 gears, Proform electric fan, subframe connectors/removed smog pump and ac!

75 shot of nitrous!

13.2 at 112 1/4 mile- no traction!
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Old 07-11-2003, 06:02 PM   #2
Rick 91GT
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What does the card say that came with your kit, it should tell you the base fuel pressure should be with a "x" FUEL JET and a "x" N2O JET
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Old 07-11-2003, 06:41 PM   #3
1jimmy__d
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i am not sure, thats why i am asking. i think it was 40. does it matter if the motor isnt stock and have different injectors, heads, etc.? any ideas or am i right at 40 you think?
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90 lx hatch, holley systemax II kit, rebuilt 302, BBK 155 lph fuel pump, pro M bullet mass meter wtih BBk cold air intake, 30 # injectors, 70 mm TB, jacobs ignition system, edelbrock water pump, BBk longtube headers with h-pipe, flowmasters, b&m ripper shifter, 3.55 gears, Proform electric fan, subframe connectors/removed smog pump and ac!

75 shot of nitrous!

13.2 at 112 1/4 mile- no traction!
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Old 07-11-2003, 06:45 PM   #4
Rick 91GT
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Most kits I have seen or delt with have a 40psi or a 50psi setting...

It is important, In the higher HP settings if your too rich or too lean you can pull the crown up on the top of the piston, and ruin the motor.

I would start at 40psi vac off and see how the plugs look you should be fine with 10-12base timing. If you go to the 100 shot go to a range colder plugs. If your Holleys take #65 w/ a .040 gap go to a #64 .040.

Check out page 7 of my site I ran the Holley kit as well, 175 shot, 15 degrees base pulled out 5 degrees right before N2O came on, 1 range colder plug gapped at .035". Read the plugs right after you spray to get a correct reading. I suggest making some small pulls, 330ft, 1/8mile before you spray the entire 1/4 mile.
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Old 07-11-2003, 07:40 PM   #5
1jimmy__d
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thanks rick, im heading ovcer there now. i have colder plugs in there now too! take care,

jim
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90 lx hatch, holley systemax II kit, rebuilt 302, BBK 155 lph fuel pump, pro M bullet mass meter wtih BBk cold air intake, 30 # injectors, 70 mm TB, jacobs ignition system, edelbrock water pump, BBk longtube headers with h-pipe, flowmasters, b&m ripper shifter, 3.55 gears, Proform electric fan, subframe connectors/removed smog pump and ac!

75 shot of nitrous!

13.2 at 112 1/4 mile- no traction!
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Old 07-11-2003, 07:53 PM   #6
Simi Stang
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Default fuel psi.

Jim, you should have checked your other post in the Power Adders forum. I just answered you question in length. You don't want to set your base fuel pressure at 50psi. The nitrous system bumps it up to the required 80psi. Just set it at the stock setting. 38psi. at idle with the vacuum tube connected.
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