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Generation III Internal Engine 1997-2006 LS1 | LS6
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PRC STG1 LS6 heads + MS4

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Old Sep 16, 2008 | 07:33 PM
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Default PRC STG1 LS6 heads + MS4
Anyone running this combo? How do you like it?
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Old Sep 16, 2008 | 08:24 PM
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what casting number do they start with? What heads do you have on your car now?
When i went to do my H/C/I I looked all a bunch of different head choices and then spoke to a local machine shop that has built a ton of really fast cars. Ended up having them do a full race port(their term) and a three angle valve job. I can not be happier with the result. Running MS4, 90/90 and ARH put down 428 to the wheels.
Just something to think about. You can get your heads ported out and still have some great flow numbers and power and probably come out with some money left over.
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Old Sep 17, 2008 | 08:19 AM
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im goin with the prc stage 1's, but with an ms3. its currently getting rebuilt. and i cant wait for the #'s. im sure you will see 400+ with basic bolt ons.
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Old Sep 17, 2008 | 08:39 AM
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I have a set of milled 2.5 tsp ls6 heads and a MS4 going on today so I might be able to get u some dyno # for that tonight. I'm hoping for at least 430rwhp on a mustang dyno.
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Old Sep 17, 2008 | 07:41 PM
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I like that combo, everything except the heads & cam.
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Old Sep 17, 2008 | 07:58 PM
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IMO, it appears that you are just a basher of PRC.
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Old Sep 18, 2008 | 10:55 AM
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Give us a call & we can provide you with engine dyno sheets from this combo. Here's a link to GM high tech article on that exact combo!

http://www.gmhightechperformance.com...ech/index.html
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994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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Old Sep 18, 2008 | 11:00 AM
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I have a similar setup to that. My heads are the stage 2.5's. The car made 485rwhp/421rwtq, before removing all accessories and going to TD's. The car runs strong. No complaints.
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Old Sep 18, 2008 | 11:53 AM
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valve reliefs with the 2.5 LS6 heads?
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Old Sep 18, 2008 | 08:36 PM
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Yes TSP cut the pistons.
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Old Sep 19, 2008 | 10:24 AM
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was on the dyno yesterday but it ran out of fuel so im geting a new fuel pump today then back on the dyno ...its been a can of worms but sould be worth it
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