custombluebird

would i gain any horsepower on a prc ls6 2.5 heads and torquerv2 if i change the injectors and if so what size?

time3777

The only way you would gain any horsepower is if your injectors are maxed out 100%.

MikeWS6

It wouldnt hurt. Most guys change the injectors on h / c.

baxsom

iTrader: (6)

injectors require tuning. you cannot just stick different injectors in and not tune. if your car was tuned with the injectors that you have now and they are not maxed out then bigger injectors will not gain you anything. most people use bigger injectors when they go head/cam because to get a proper tune on the stock LS1 injectors the duty cycle goes close to if not over 100%. if your tune doesnt do that, then no need.

christiandoy

iTrader: (1)

what baxsom said, it's all in the tune

badazz81z28

iTrader: (6)

That really doesnt answer the OPs questions. Will that set-up max out 28lb injectors?

christiandoy

iTrader: (1)

It very well could, I would go with 33 lb injectors to be safe or even bigger
The bigger you go the more you can play with the tune

christiandoy

iTrader: (1)

also badazz check your pm about the comp cam 230/230 you were interested in

flintwrench69

iTrader: (11)

Pretty close, I would upgrade them. 36s would work.

badazz81z28

iTrader: (6)

Who sells LS1 injectors that size besides FAST?

Checking PMs now..

flintwrench69

iTrader: (11)

Tons of places. I bought my 42s on ebay but theres fuel injection connection & just about any vendor that sponsors this site.

badazz81z28

iTrader: (6)

Would you PM me the Ebay seller?

custombluebird

the car isnt tuned yet thats why im asking and also what about meth kit would those help out?

baxsom

iTrader: (6)

i bought 30lbers from fuelinjectorconnection.com for an outstanding price and they even paid me for my stock ones.

NC98Z

iTrader: (1)

I have the MS4 and the TSP 243 Stage 2.5s. It was fine with the 28# injectors until I went the Fast 90/90 route. When we put on the Fast 90/90 we went with 42# Ford Green Tops and retuned and got a +27rwhp increase. So I would say your probally good to go until you update to a bigger intake.

custombluebird

if i would change the injectors would i need to change the fuel pump and what size are the stock ones ?

BrntWS6

iTrader: (7)

Most say the fuel pump is good for 450rwhp, but a lot of guys have gone higher with no problems. I've got 442hp on a Mustang dyno and my fuel pressure is fine. For the price difference you might as well get 42lb injectors. I got mine from FIC also, they were around $250. Injector size will be 26lb or 28lb depending of year.

custombluebird

okay sweet and my dads friend just told me has a 36lb and he would sell me them for $50 there brand new. he got them for his camaro but he went bigger. are they worth it?

BrntWS6

iTrader: (7)

That's a good deal....grab em'

custombluebird

okay will do thank you for the help guys