Jimmy

I've just about got all the extra things i need for my cam swap in the spring, but what about fuel injectors. Will the stock 26lb injectors be fine with a cam like FM13 with stock heads? If not, what size do i need, 28lb? Anyone maxing out their injectors with a cam in the 230 range?


Jimmy

2000 Trans am Ws6
Current mods: slp LT, lid, borla cat back, 4.10s, fidanza aluminum flywheel, Spec stage 2 clutch, lots of suspension.

mods waiting to put on: ls6 intake, asp pulley, ls6 ported oil pump, ls2 timing chain, cam, Patriot duals springs or PRC.

Jimmy

Anyone got a suggestion?!?!? I just dont know if i should spend 60 bucks and get the 28lb injectors from texas speed or if i need larger ones than that.

Thanks, Jimmy

SidewayzOZ

iTrader: (11)

You'll be perfectly fine with the stock injectors. I wouldn't upgrade until you get heads and/or poweradder. Cam only you'll be fine with 26'ers.

Bluehawk27

the injectors on my 2002 ls1 maxed out with the F13 cam. I get all the "your stock injectors are good to 450rwhp" BS. But guess what? they werent! In my case they were run to 111% Duty cycle just to get her tuned. Candy at FMS told me that they were begining to hear this more often. Good luck

camrsz

iTrader: (4)

did you upgrade and what did you go with?

Bluehawk27

I bought some 36# injectors from EAD for 170 or something like that. I'm going to install them today.

jub jub

Racetronix is having a special on their Delphi 32# right now. They flow 36.5# at 58 PSI and would be a good choice with room for expansion.

Jimmy

Thanks for all the replies........I guess i am gonna wait until after the dynotune to see if i really need to ungrade. I gotta save all the money i can b/c the little stuff really adds up .

RollinSScamaro

iTrader: (25)

What benefits would you have switching to bigger injectors? Would it just keep the engine from being choked up? Any power gains? I have an F11 in and was debating whether i need new ones or not? any help?

LSUxBlake

iTrader: (3)

You don't need new injectors.

RollinSScamaro

iTrader: (25)

awesome.. thanks for a straight up answer.. always makes it easier! haha

Bluehawk27

How can you say he doesnt need injectors? People were telling me the same thing, and that i would be good to 450rwhp, but they were wrong. Only way to find out is to get dyno tuned and find out what the duty cycle on yours are. Industry standard is to not run over 80%.

2001 Pewter WS6

iTrader: (43)

There has to be something up with either your fuel pump or your injectors. My stock 28# injectors handle my F13 with ported heads. Stock injectors with a cam only should be fine unless there is some other issue with the car.

Bluehawk27

If there is we havent found it. The PSI is fine, and it was tuned. I may have just gotten some shitty injectors from the factory, but if that iswhat happened to me it could happen to someone else also.

NO5.0

iTrader: (1)

Now you guys got me wondering if i need to upgrade my injectors when my h/c combo comes in? 346 w/afr205s& g5x3 and no2. By the way i know they upgraded the injectors in 01 but what size are factory for an 01 ss 28 or 26? Thanks

PREDATOR-Z

28.8 at 4 BAR.

400 rwhp NA does not require injector swap, over that a dyno tune will determine that. 80 to 85% cycle is good after that you're overloading the injectors and run risk of failure.

As for N2O if you shoot wet, then you'll need a fuel pump, dry and you'll need both pump and injectors.

NO5.0

iTrader: (1)

NOZZEL KIT, thanks appreciate the info!

2001 Pewter WS6

iTrader: (43)

Did you buy the car new or used? If new then you may have something up with the injectors, if used maybe someone swapped them out with 26#ers. I will be selling my injectors because I am going to a 408ci. PM me if you are interested. They have low miles on them.

Bluehawk27

I bought the car new. Thanks for the offer, but i have since changed out the injectors.
Thanks!