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Stage 2.5 5.3L PRC heads + MS3 Cam; Fuel Injectors

This is a discussion on Stage 2.5 5.3L PRC heads + MS3 Cam; Fuel Injectors within the External Engine forums, part of the LSx Technical Help Section category; Its tax time, and I'm blowing it on Stage 2.5 5.3L PRC heads and an MS3 cam kit from Texas ...

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    Member first01SS's Avatar
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    Talking Stage 2.5 5.3L PRC heads + MS3 Cam; Fuel Injectors

    Its tax time, and I'm blowing it on Stage 2.5 5.3L PRC heads and an MS3 cam kit from Texas Speed. I've got a stock LS1, and I'm looking to push the maximum amount of HP from a head+cam combo. I'm not sure which fuel injectors (and fuel pump) i need to really need to safely run this daily driver with 100 hp shot of occasional nitrous. Also, i have stock Z28 exhaust manifolds with a single 3" QTP cut out at the Y pipe. Please help a novice out.. I want to buy today. Anticipation is killing me.

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    JUISSED Midnight02's Avatar
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    Is your shot of N2O wet or dry?

    If it's a wet kit, you should be good -- the stock 01 - 02 injectors are typically good to 465 N/A rwhp. If it's a dry kit, a quality 42lb injector should do the trick and I'm a big fan of the Racetronix fuel pump + the hotwire kit. The Racetronix kit is a little pricey compared to a Walbro, however I like having a consistent 64 pounds of pressure at the rail.

    Although I'm a little biased, I absolutely love the Stage 2.5 5.3L heads. The MS3 cam is a proven performer, so it should make for a good combo (as long as there's sufficient PTV clearance). The heads are great down low and the cam screams up top, so you should pull pretty hard throughout the powerband.
    2002 Camaro SS M6, 2.5 PRC 5.3L heads, TFS 228/230 cam, FAST 92, bolt ons + a 10 lb bottle in the back.


    1989 Corvette L98, A4, Full bolt ons, etc.

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    im about to buy the 5.3l heads as well and a 228 cam from texas speed. i was recommended by many of the guys on this site that it is better to put headers and at least an ls6 intake to get the full potential of a cam. i bought a 85mm intake from bbk for $400 and pacesetter long tubes and ory coated for $479. the lt's are on texas-speed on sale, i couldnt find them any cheaper anywhere else.

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    Member first01SS's Avatar
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    I don't want to run the stock injectors at 100%+ all the time. I'd rather get injectors compatible with my stock ECU that will last... i just don't know what to pick. The Racetronix kit is an excellent idea, and that sounds like a winner to me; especially since i have a wet plate kit from HSW.

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