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Aug 15, 2014 | 09:03 PM

majestoke

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From: Los Angeles, Ca.

Need help and ideas.

I'm a rookie when it comes to adding horsepower to these engines. This is my second 4th generation z28 camaro, my 1st was a 98 Z28 m6. I didn't have it long enough to really get to do anything to it. I just bought a 2002 z28 with 122,000miles on it with an a4. Its bone stock and I wanted to know what mods I would have to do to reach 425rwhp. Any help will be appreciated

Aug 15, 2014 | 09:25 PM

HCI2000SS

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From: Howell & Fenton MI

Heads cam and bolt ons will get you there

Aug 15, 2014 | 09:29 PM

majestoke

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It has 241 heads now. What size cam could I go with these heads and are the 317 heads an upgrade over the 241?

Aug 15, 2014 | 09:44 PM

ULTIMATEORANGESS

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if nothing else get a quality stall converter. autos are about 1/4 mile more than HP.

with that mileage you might be ready for a trans rebuild though.

Aug 15, 2014 | 09:46 PM

"MAC"

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From: chattanooga Tn

Get a trans cooler and build the 60e nothing smaller than a 3600 stall, ask Martin on the cam choice but id say something bigger than my cam for sure, heads you can get 243 heads for a decent price or better yet get a good head/cam package and up grade the gears to 3:73, or higher. Lastly full bolt ons, headers go with 1 7/8 long tubes.

Aug 15, 2014 | 09:49 PM

majestoke

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What kind of gains did you get with your ported 241 heads? And what do you guys think of the stalls Texas speeds sales?

Aug 15, 2014 | 10:20 PM

"MAC"

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Honestly idk lol its at the shop bc its messed up at the moment. How ever with SLP Lid, pacesetter lt 1 3/4 headers and my ported heads i made 335rwhp and 350rwtrq.
I plan on changing my headers pretty soon to get 1 7/8 or 2" haven't decided yet. But Martin said my cam goes great with my heads so once my car is running correctly i can let you know how much power its making.

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Aug 15, 2014 | 10:38 PM

"MAC"

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From: chattanooga Tn

Texas Speed is good place to order headers or summit definitely shop around to get the best price usually some one will have a sale going on.

Aug 15, 2014 | 10:52 PM

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majestoke

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Someone told me if I go bigger then a ls6 cam I won't be able to keep my car emissions legal. I stay in Los Angeles in they're super tight on emissions out here.

Aug 15, 2014 | 11:05 PM

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"MAC"

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Quote:

Originally Posted by majestoke

Someone told me if I go bigger then a ls6 cam I won't be able to keep my car emissions legal. I stay in Los Angeles in they're super tight on emissions out here.

Thats BS get bigger injectors and get an E85 tune you will pass your emissions no problem