Hey guys, they kicked my other thread off so im posting this one. think i might have cussed in the other one, not sure. but most of you think i should go with 42# injectors, what do you think about going on up to 60#, there around the same cost and will fuel a lot more power, and the 42s hold up to 550 and im a little over 500 now without heads and cam and bottom end work, so once i get all that i should be well over 550. what do you think?

 

Assuming a this is a FI car? Based on name and no motor work.

To be honest, a Properly match H/C set up will put you far beyond redline when it comes to stock LS1 life expectancy.

If the car was N/A or Nitrous #42's are fine, when your under boost, having that extra injector makes a huge diff.

What have you done with the rest of the fuel system? Also, some details about the car.

Thnx

 

well just bought the car a little under 2 months ago the way it sits, so not sure all the details but i do know that its got the p1sc procharger thats supposed to be running 11psi, ive never had it over 6 though, bbk ssi intake, bbk 80mm throttle body, 400hp slp performance pack that comes with rockers, long tubes, y-pipe, high flow cats, resonator, and programmer and 38lb injectors. but no head work or bottom end work as far as i know, and im pretty sure it doesnt have a cam either, if it does its a very mild cam because you cant really hear it at all. external fuel pump on it but i cant remember what kind, getting ready to put a clutch in it next week so i'll let you know what pumps on it when we get it back on the lift

 

In my opinion you should not trust this kind of a
setup to a handheld programmer, especially one
that was only set up for the bolt-ons and not the
blower. If you want to mess with 11PSI you need
a 2-bar MAP sensor and an OS that can use it.

Your injector decision ought to be based on the
maximum duty cycle - going bigger than you need
to stay below 80% or so, helps nothing and hurts
idle more than likely.

 

ok thanks man, i'll look into those things.

 

I agree with jimmyblue....

 

got some bosch 42s for now, im putting out less than 550 so for now this is all I need. should be getting it tuned next week or the week after, i'll let you know what exact numbers it puts down on the dyno, thanks for the help guys

 

42 is all you will need, thats what I have with ms4 and heads