best nitrous for lt1s
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From: Pittsburgh, PA
best nitrous for lt1s okay guys got a built lt1
as follows
230/242 .510 113 ls
Je nitrous pistons
Comp Cams Pro Magnum 1.6 roller rockers w/7/16" studs
Comp Cams 987 Dual Valve Springs
SI Silverline Series Valves,(2.00" intake and 1.97 Exhaust)
Eagle H beem connecting rods
Crane Hardened Push Rods
with stock crank
i kno it will handle more than i wana hit it with
but i really dont wana go over 125 hp shot
which kit is the best wet or dry??????????????????????????????
and it seems like the zex is the simiplest is that true whats ur thoughts guys and what else would i need?
the main thing is it dry or wet thats best
as follows
230/242 .510 113 ls
Je nitrous pistons
Comp Cams Pro Magnum 1.6 roller rockers w/7/16" studs
Comp Cams 987 Dual Valve Springs
SI Silverline Series Valves,(2.00" intake and 1.97 Exhaust)
Eagle H beem connecting rods
Crane Hardened Push Rods
with stock crank
i kno it will handle more than i wana hit it with
but i really dont wana go over 125 hp shot
which kit is the best wet or dry??????????????????????????????
and it seems like the zex is the simiplest is that true whats ur thoughts guys and what else would i need?
the main thing is it dry or wet thats best
Well if you already have injectors and don't feel like buying new ones, wet would be the cheaper route. Better is pretty subjective and people will argue for either side.
Main thing with a wet is you're trying to flow fuel through an intake not designed to flow fuel and "can" cause an issue with an n2o backfire. Since the intake is aluminum this isn't as much of a concern as composite intake vehicles. With an LT1 typically the most common damage from an n2o backfire is blowing off a filter and a damaged MAF. But, with a wet shot you don't need to rely on the injectors to add fuel for the nitrous shot, so smaller injectors can be used in a wet setup than a dry, instead it relies on a fuel line either plumbed to a shark nozzle or plate. A typical LT1 dry kit like the one I had which was an NOS brand kit relied on a vacuum line feeding to the FPR to regulate the amount of fuel added with a jet inline.
IIRC for fuel pressure anywhere from 37-41psi at idle is considered acceptable, while 43~ psi is the ideal number at WOT, this is with a stock or relatively stock car. My 383 with H/C had around these numbers as well though. For a H/C car WITH n2o, you'll want to step up to a 255lph pump or more.
Main thing with a wet is you're trying to flow fuel through an intake not designed to flow fuel and "can" cause an issue with an n2o backfire. Since the intake is aluminum this isn't as much of a concern as composite intake vehicles. With an LT1 typically the most common damage from an n2o backfire is blowing off a filter and a damaged MAF. But, with a wet shot you don't need to rely on the injectors to add fuel for the nitrous shot, so smaller injectors can be used in a wet setup than a dry, instead it relies on a fuel line either plumbed to a shark nozzle or plate. A typical LT1 dry kit like the one I had which was an NOS brand kit relied on a vacuum line feeding to the FPR to regulate the amount of fuel added with a jet inline.
IIRC for fuel pressure anywhere from 37-41psi at idle is considered acceptable, while 43~ psi is the ideal number at WOT, this is with a stock or relatively stock car. My 383 with H/C had around these numbers as well though. For a H/C car WITH n2o, you'll want to step up to a 255lph pump or more.
Fuel pressure seems ok to me as well but like the injectors, it needs to be tested at WOT to make sure the pressure isn't bleeding down.
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Verdad Gallardo As for the tune, plenty of people run untuned dry shots with zero issue, myself being one of them who formerly did. Ran a maxed out powershot solenoid dry shot on a bolt on car with a stock tune outside of the injectors being set to 30#. Know tons of other LS and LT cars who did the same or similar. Regardless though he has a H/C 355, he shouldn't be untuned regardless of whether he wants to hit it with n2o so it's a moot point.
Like I previously mentioned a wet shot has the risk of fuel puddling since the intake was not designed to flow fuel, only air. Also since this is the case, unequal fuel distribution to all cylinders can be an issue. Since a dry shot uses the factory fuel system to add fuel, it will provide a theoretically more equal distribution of fuel.
Last edited by myltwon; Apr 1, 2013 at 07:16 PM.
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Joined: Sep 2010
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I edited my post about the fuel pump.
I just put in a Racetronix 255 with hotwire. Pretty easy if you know how to repin connectors.
Okay heres how it work.
Dry Shot: Sprays only nitrous. It uses your injectors to add the extra fuel needed.
Wet Shot: Has nitrous and fuel noids, sprays the extra fuel with the nitrous.
Also yes a stock tune would work as cars are tuned on the slightly richer side from the factory specially at WOT. WOT for a LT1 is generally around 11.5 which is extremely rich. So its already dumping extra fuel thats not needed, then drop in some 30lbs injectors now you are really dumping extra fuel.
Also heard that Zex box really doesn't do much.
Think about it, the injectors are controlled by the PCM, so in order to control the injectors you need to piggy back or standalone the PCM.
I just put in a Racetronix 255 with hotwire. Pretty easy if you know how to repin connectors.
Okay heres how it work.
Dry Shot: Sprays only nitrous. It uses your injectors to add the extra fuel needed.
Wet Shot: Has nitrous and fuel noids, sprays the extra fuel with the nitrous.
Also yes a stock tune would work as cars are tuned on the slightly richer side from the factory specially at WOT. WOT for a LT1 is generally around 11.5 which is extremely rich. So its already dumping extra fuel thats not needed, then drop in some 30lbs injectors now you are really dumping extra fuel.
Also heard that Zex box really doesn't do much.
Think about it, the injectors are controlled by the PCM, so in order to control the injectors you need to piggy back or standalone the PCM.
Go with a wet kit. Make sure you get a 255 pump, run a colder nonprojected tip plug, and pull some timing. Youll be plenty safe. Youll get bored with a 125 shot and be wantin more. It always happens lol.
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Or just hook up a Reddi Whip can to your intake.
Staging Lane
Joined: Mar 2006
Posts: 94
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Yes forgot about the colder plug. I ran NGK TR6 plugs btw.