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402 stroker with ls6 ported heads

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Old Nov 13, 2007 | 07:28 PM
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Default 402 stroker with ls6 ported heads
i was wondering if i could get 500 rwhp with 402 stroker, ls6 ported heads, and a big cam?
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Old Nov 13, 2007 | 07:43 PM
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Originally Posted by trans am 98
i was wondering if i could get 500 rwhp with 402 stroker, ls6 ported heads, and a big cam?
Yep, a Fast 90/90 will make it easier, and of course, QUALITY ported LS6 heads, not simply the cheapest you can find.
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Old Nov 13, 2007 | 08:52 PM
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FWIW, I am doing the same thing. Since I blew up my LS1 engine last August, I have just recently purchased an LS2 402 stroker from TSP. To reduce the cost to get the car back on the road I am going to re-use the top end: PP LS6 ported heads, LS6 intake, and ported factory TB. I think that with the LS6 intake I might make 475 RWHp.

Later, I hope to upgrade the FAST 90 intake, 90mm TB, and MAF. And if I get really crazy go with L92 heads and L76 intake. With this combo, I hope to make 500 RWHp.
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Old Nov 13, 2007 | 10:28 PM
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I think people underestimate LS6 heads a lot. Properly ported LS6 heads will outperform many aftermarket castings.
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Old Nov 14, 2007 | 10:27 PM
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Doc99 you should have no trouble making 475, I did 473/465 on a stingy dyno on a hot day, with a 9" rear, 19 lb Dennys Nitrous DS and Heavy as hell MT DR's. This also was with a LS6 intake and 1 3/4 headers.
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Old Nov 14, 2007 | 11:09 PM
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Originally Posted by trans am 98
i was wondering if i could get 500 rwhp with 402 stroker, ls6 ported heads, and a big cam?
I has been done with stock size LS6 valves on a much smaller LS engine than a 402. However, it was not a street engine, and it was quite costly. The heads were a work of art and responsible for much of the power. Stock, unported intake by the way and thru race mufflers. The cam was smaller than you'd imagine.

So yes, it can be done. Choose your engine builder VERY carefully.
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Old Nov 14, 2007 | 11:20 PM
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With the right combination it is very easy to do. We consistantly build 540+rwhp 427cid motors that are using our LS6 ported heads. As mentioned above, a properly ported LS6 head will outperform many aftermarket castings.
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Old Nov 15, 2007 | 11:28 AM
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Damn Old SStroker, lookin sharp these days!! Make a trip to the plastic surgeon, or just been takin double doses of geritol?!!?? JK hahaha
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Old Nov 15, 2007 | 01:44 PM
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Originally Posted by edcmat-l1
Damn Old SStroker, lookin sharp these days!! Make a trip to the plastic surgeon, or just been takin double doses of geritol?!!?? JK hahaha
Thanks! Make that 'Geritol' Pappy Van Winkle 20 yr. old bourbon.

Burt Reynolds and I are often mistaken for brothers......NOT!

Here's the explanation, FWIW.

https://ls1tech.com/forums/showpost....1&postcount=31
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Old Nov 15, 2007 | 02:53 PM
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Funny stuff. I knew who it was, and kinda figured the relation. I'm familiar with your boy.
Sorry for the hi-jack, OP!!
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Old Nov 15, 2007 | 03:31 PM
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I have ported LS6 heads and dyno over 500rwhp with a TH400 on a 29in slick.
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Old Nov 15, 2007 | 04:17 PM
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I made 515rwhp with a TSP 402 short block, TEA Stg 2 LS6 heads, Texas Giant cam and 90/90 Fast.
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Old Nov 15, 2007 | 06:39 PM
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with a good cam youll easy make more than that
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Old Nov 16, 2007 | 08:13 PM
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thanks for all the info guy's appreciate it
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Old Nov 16, 2007 | 08:34 PM
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i know someone that had a 408 with ported ls6 heads ls6 intake 78mmtb 1 7/8" lt's 6 speed witha good tune he made 502rwhp
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Old Nov 16, 2007 | 08:36 PM
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Originally Posted by Beaflag VonRathburg
I think people underestimate LS6 heads a lot. Properly ported LS6 heads will outperform many aftermarket castings.
FINALLY!!!!! Someone with common sense.
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