Double Checking
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Joined: Dec 2006
Posts: 417
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From: Canada
Double Checking decided im going to start a build
goals are high 6's to the ground threw a boosted 383
now i did use the RC Fuel Injection calc. and this is what i got
Desired crank hp 725
number of same sized injectors 8
brake spec. fuel consumption .625 (being tis turbo and to be safe i went in the middle)
max duty cycle .8
fuel sys. PSI @ rails 45 *i did some serching and thats what a stock lt1 came out with so i thought i would just use that*
with this it gave me 66.83 LBS/Hr or 702CC/Min
should of i hiked up the rail PSI? or will the stock PSI work fine for what im going after? after seeing mightyquicks build with an almost totaly stock fuel system i was thinking that my racetronixs pump/hotwire kit with an added boost a pump should be able to do this fine threw the stock F.P.R. please tell me if im way out there.
and 60's should work for me, correct?
goals are high 6's to the ground threw a boosted 383
now i did use the RC Fuel Injection calc. and this is what i got
Desired crank hp 725
number of same sized injectors 8
brake spec. fuel consumption .625 (being tis turbo and to be safe i went in the middle)
max duty cycle .8
fuel sys. PSI @ rails 45 *i did some serching and thats what a stock lt1 came out with so i thought i would just use that*
with this it gave me 66.83 LBS/Hr or 702CC/Min
should of i hiked up the rail PSI? or will the stock PSI work fine for what im going after? after seeing mightyquicks build with an almost totaly stock fuel system i was thinking that my racetronixs pump/hotwire kit with an added boost a pump should be able to do this fine threw the stock F.P.R. please tell me if im way out there.
and 60's should work for me, correct?
The 60's will be a little small for upper 600rwhp levels unless you boost the pressure to a higher base (say 58#) & also boost reference (which the stock LT1 regulator will not do).
Upper 600's for RWHP will equate closer to 800 flywheel.
Before you buy a boost-a-pump, you may want to consider the dual intank setups that I produce to feed your car, the cost works out close to a single kit plus BAP, & it will give you more reserve capacity for future increases.
Feel free to give me a call if you want to discuss this in more detail.
I can be reached at (724)322-8505.
Upper 600's for RWHP will equate closer to 800 flywheel.
Before you buy a boost-a-pump, you may want to consider the dual intank setups that I produce to feed your car, the cost works out close to a single kit plus BAP, & it will give you more reserve capacity for future increases.
Feel free to give me a call if you want to discuss this in more detail.
I can be reached at (724)322-8505.
Thread Starter
TECH Regular
Joined: Dec 2006
Posts: 417
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From: Canada
will do next weekend.
so the racetronixs kit with a nice B.A.P will not work?
would i have to up the stock PSI AND get a boost reg fuel pres. reg.? or would a boost ref unti do it all in one?
so the racetronixs kit with a nice B.A.P will not work?
would i have to up the stock PSI AND get a boost reg fuel pres. reg.? or would a boost ref unti do it all in one?
A BAP may get you by, but it is not the best method to get your required fuel.
I prefer to be safe on fuel systems as lean mixtures kill parts very quickly under boost.
You will likely need to increase pressure as even with boost referencing & 43psi base, you may run out of injector before 650rwhp.
I prefer to be safe on fuel systems as lean mixtures kill parts very quickly under boost.
You will likely need to increase pressure as even with boost referencing & 43psi base, you may run out of injector before 650rwhp.
Thread Starter
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Joined: Dec 2006
Posts: 417
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From: Canada
so what would you recamend?
twin intakes, boost ref. fuel PSI reg., bumping up base fuel PSI and larger then 60# injectors?
wont all this make the car a very large pig out of boost and for just driving around from a-b?
twin intakes, boost ref. fuel PSI reg., bumping up base fuel PSI and larger then 60# injectors?
wont all this make the car a very large pig out of boost and for just driving around from a-b?
I do these all the time...
60's at elevated fuel pressure on a 383 should be no problem for a good tuner.
The Dual pump kit & boost reference will be perfect for a daily driver as you only supply additional fuel on demand.
60's at elevated fuel pressure on a 383 should be no problem for a good tuner.
The Dual pump kit & boost reference will be perfect for a daily driver as you only supply additional fuel on demand.
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TECH Regular
Joined: Dec 2006
Posts: 417
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From: Canada
then thats what i shall do
one other questions, this hobs switch.. is it a manual switch i mount and fire up when im going to running higher boost, or is it a WOT switch that only comes on when im really on it?
one other questions, this hobs switch.. is it a manual switch i mount and fire up when im going to running higher boost, or is it a WOT switch that only comes on when im really on it?
Thread Starter
TECH Regular
Joined: Dec 2006
Posts: 417
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From: Canada
so i need to run a boost/vac line to it, witch its mounted under hood(?) then wires to the second pump? or is most of this suplyed with the fuel pump assembly?
if im reading this correctly, witch i may not be(its been a long week) i send you my current fuel pump assembly/ sending unit to be moded to hack two of the race tronixs pumps, scince i alreayd have one,*has less then 150mi on it* would it be used, or would i get two new ones??
just trying to get an idea of what im going to be re using and what i should try and sell, i know the 42's are going to have to go
if im reading this correctly, witch i may not be(its been a long week) i send you my current fuel pump assembly/ sending unit to be moded to hack two of the race tronixs pumps, scince i alreayd have one,*has less then 150mi on it* would it be used, or would i get two new ones??
just trying to get an idea of what im going to be re using and what i should try and sell, i know the 42's are going to have to go
Lonnie is great to deal with on his custom twin in-tanks for the LT1. I just sent him a brand new GM intank that he will upgrade for the twin in-tank setup. When are you going to post the pics of your setup. I've asked you to post pics at-least 3 times and you still have not done anything. There are alot of LT1 guys that want to see a good photo-shoot of the OFI kit on a LT1 ! Stop being lazy and post the pics 
