att. Willie and others that have used NOS with a blower
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From: Stillwater OK
Car: 88 IROC
Transmission: pg
Axle/Gears: 9" w/3.89
att. Willie and others that have used NOS with a blower
Ok I'm wanting to put a small shot of NOS on top of my blower. I'm running 24# SVO injectors, a FMU, and stock pump plus a inline. I need to know if my fuel system is capable to handle a 50-100 shot of NOS. If so what kit do I need to get. Wet or Dry? I have never used NOS before and want to be really carfully if and when I do. Thanks for any help.
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88 IROC 350 tpi, SLP cam, SLP headers 1 3/4, SLP siamised runners, Accel 58mm tb, Comp 1.6 RTR, Flowmaster 3" catback but not cat, TH350 with B & M Holeshot 3000 stall, 3.27 9 bolt posi disk rear, Vortech S-trim Supercharger, K & N and 24# SVO injectors
91 RS t-top's, tbi 305, 15.7 in 1/4,
x911 Kenwood cd player 2 12" Solo-barics L7's,RS 5.2 pack in kick panels, impulse 6x9's, a ZX460 and more to come soon.
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88 IROC 350 tpi, SLP cam, SLP headers 1 3/4, SLP siamised runners, Accel 58mm tb, Comp 1.6 RTR, Flowmaster 3" catback but not cat, TH350 with B & M Holeshot 3000 stall, 3.27 9 bolt posi disk rear, Vortech S-trim Supercharger, K & N and 24# SVO injectors
91 RS t-top's, tbi 305, 15.7 in 1/4,
x911 Kenwood cd player 2 12" Solo-barics L7's,RS 5.2 pack in kick panels, impulse 6x9's, a ZX460 and more to come soon.
Joined: Jul 1999
Posts: 2,926
Likes: 5
From: Tucson, Arizona USA
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Terry,
Your fuel system should be capable of sustaining a 50-shot of nitrous. My setup is similar with a Buick GN in-tank and a Vortech T-Rex external pump. I have never attempted running larger nitrous jets with the blower, so I do not know if fuel pressure would be sustained at that level.
This may be outdated info, but I don't think anyone makes a dry kit for third gens.
My only concern with your setup is your FMU. With greatly increased fuel pressure under boost, you may be introducing more fuel via the nitrous fuel line than needed. The nitrous jet sizes are determined at a certain pressure (typically 40 psig). You are running substantially higher than this pressure when under boost, so it makes sense to me that you'd be running extremely rich. You could solve this problem by decreasing the fuel jet size and retaining the nitrous jet size. However, you would run extremely lean when not in boost. I don't know of a solution to this, other than to remove the FMU and go with a supplemental fuel supply system, such as Carroll's SuperFueler. I myself have never run an FMU so this is not a concern on my car.
I just ordered my D1SC kit and planning NOT to use the FMU, even though I do not plan using nitrous when it's installed. I will be pushing more boost to make up the "difference". First, I will gather data via my Auto Xray to see what kind of O2 readings I get under boost. With my old Paxton, I did not need to increase fuel pressure under boost, so it will be interesting to see what happens with the ATI. If and only if my O2 voltage is too low, I will be using the Superfueler system.
Hope this helps.
------------------
Willie
Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
12.57 @ 111 mph.
12.04 @ 114 mph (50-hp nitrous).
http://members.optushome.com/au/downunder1/rides/willie/willie.html
1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.
[This message has been edited by Willie (edited December 14, 2000).]
Your fuel system should be capable of sustaining a 50-shot of nitrous. My setup is similar with a Buick GN in-tank and a Vortech T-Rex external pump. I have never attempted running larger nitrous jets with the blower, so I do not know if fuel pressure would be sustained at that level.
This may be outdated info, but I don't think anyone makes a dry kit for third gens.
My only concern with your setup is your FMU. With greatly increased fuel pressure under boost, you may be introducing more fuel via the nitrous fuel line than needed. The nitrous jet sizes are determined at a certain pressure (typically 40 psig). You are running substantially higher than this pressure when under boost, so it makes sense to me that you'd be running extremely rich. You could solve this problem by decreasing the fuel jet size and retaining the nitrous jet size. However, you would run extremely lean when not in boost. I don't know of a solution to this, other than to remove the FMU and go with a supplemental fuel supply system, such as Carroll's SuperFueler. I myself have never run an FMU so this is not a concern on my car.
I just ordered my D1SC kit and planning NOT to use the FMU, even though I do not plan using nitrous when it's installed. I will be pushing more boost to make up the "difference". First, I will gather data via my Auto Xray to see what kind of O2 readings I get under boost. With my old Paxton, I did not need to increase fuel pressure under boost, so it will be interesting to see what happens with the ATI. If and only if my O2 voltage is too low, I will be using the Superfueler system.
Hope this helps.
------------------
Willie
Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
12.57 @ 111 mph.
12.04 @ 114 mph (50-hp nitrous).
http://members.optushome.com/au/downunder1/rides/willie/willie.html
1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.
[This message has been edited by Willie (edited December 14, 2000).]
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