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Old Jan 10, 2006 | 01:13 PM
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Default C5 Fuel Pump Limit

What is the general HP limit of the C5 Z06 stock fuel pump?

i.e. can it supply 450-500rwhp on the stock pump?
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Old Jan 10, 2006 | 01:47 PM
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I wouldn't try it. It can do it with a boost-a-bump. Also you might need an injector change at that point also. Depending on the 26lbs won't handle that very well, and the 28lbs aren't much better
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Old Jan 10, 2006 | 02:28 PM
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Originally Posted by ls1itldo
I wouldn't try it. It can do it with a boost-a-bump. Also you might need an injector change at that point also. Depending on the 26lbs won't handle that very well, and the 28lbs aren't much better
I know, probably go with some 42#ers, I am just wondering generally how much hp the stock pump can flow
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Old Jan 10, 2006 | 03:29 PM
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I ran a stock pump with 450+ rwhp for a year and it held fine. Although the 28.8# injectors were maxed out. It was starting to make noise so I upgraded to the LPE pump and bigger injectors. The install is fairly easy to swap the pumps. I've always heard that 450-500 is about max for them.
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Old Jan 10, 2006 | 04:07 PM
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the stock pump will work fine, you'll just need the injectors, I run 42lb lucas and the stock pump is holding good pressure all the way through the gears, and I'm boosted too so I'm pumping alot of fuel in under boost..
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Old Jan 10, 2006 | 04:23 PM
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Originally Posted by Assassin
the stock pump will work fine, you'll just need the injectors, I run 42lb lucas and the stock pump is holding good pressure all the way through the gears, and I'm boosted too so I'm pumping alot of fuel in under boost..
Really I am trying to determine this because I am thinking of doing a small dry shot on my Z06 (I have always preferred wet, but I am only going 100shot max and I believe the MAF can handle a 100 shot before maxing). I have no big mod plans for the z06, but I am trying to determine if I can get away with stock pump on a 100 shot.

So what hp levels have you seen? Replacing/tuning new injectors is not a big deal at all...but I dont even think I will need new inj for a 75/100 shot. I will check the duty cycle on the dyno when I install the kit.
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Old Jan 10, 2006 | 09:47 PM
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is the n2o the only mod?.. make sure to put some tr6's in and take out a couple deg. of timing, also if your dyno tuning do it on a mustang dyno...
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Old Jan 11, 2006 | 09:06 AM
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A nitrous vendor (Sponsor) on corvetteforum confirmed that the stock pump can support up to 550rwhp

I bet these would be perfect: http://www.lethalperformance.com/pag...19b9f8d84ecaa7
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Old Jan 11, 2006 | 02:55 PM
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f-that, you can get 42lb injectors for less $...
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Old Jan 11, 2006 | 03:18 PM
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Originally Posted by Assassin
f-that, you can get 42lb injectors for less $...
true, but these are GM, and I think 'look' the same as the factory ones...ill have to check.

see I want to make it so I have to remove as little as possible when taking the car in for any probs (warranty)
The injectors are simple, but I dont want to give the car ANY sign of being mod'd.
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