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Old Nov 27, 2006 | 04:48 PM
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Default TREX/Head question

i'm thinking about running the T.R. TREX cam in my SS...i'll have the necessary supporting mods when the install time comes, but i plan on leaving the bottom end and heads stock for now...

i was thinking about taking my stock heads to a local racing engine shop and having some port work done while i was putting the cam in. would this be a worthwhile venture, or should i just save up for some aftermarket heads? obviously the more airflow the better, but i want to waste as little time and money as possible.

if it's too cold to ride my R6, i'll be driving this car. i know a TREX isn't exactly the best DD cam choice, but i don't really givashit. i'm trying to get a 11 second car with a stock bottom end...at least until it breaks. i just want to know if i can get away with this using my stock heads and maybe some porting....or if i have to splurge on some LS6's or AFR's or whatever i decide to go with....?

thoughts?
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Old Nov 28, 2006 | 12:18 PM
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so i take it this was either a good question, or a really really stupid one.....

any help/thoughts/ideas? anybody?
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Old Nov 28, 2006 | 12:34 PM
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You don't need a Trex to get 11s. You could use a better DD friendly cam and nitrous.
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Old Nov 28, 2006 | 01:22 PM
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Or a 224/224 cam and a set of ported budget heads.

Ben T.
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Old Nov 28, 2006 | 03:55 PM
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i've never been a fan of nitrous, if i'm gonna use a power adder, it'll be boost. for some reason N20 seems kinda like cheating to me...no offense to those who use it. it DOES make you go fast, but there were a lot of street races i lost by a couple fenders due to the squeeze back in the day....i'd rather have the same horsepower all the time. besides, nitrous is just a quick fix, it'll end up costing way more than a blower in the long run just due to bottle refills. plus i wanna keep my stock bottom end IN this motor, not ON the track...i know a small shot wouldn't be that bad, but i'm just morally against nitrous...sorry i could go on and on why i don't want nitrous... ...but it doesn't matter. N20 has it's place, but that place is not in my particular car.


as for the cam, i flat out just WANT a T-Rex. i think it's about the best sounding cam out there. i know that's a bad reason for cam selection, but i don't care. my car, my money ...if it ends up being too much, i'll put the stocker back in and build a 408 around the T-Rex ...or something...

i just wondered if anyone knew from experience how well it went with stock heads or stock heads with a mild port job....
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Old Nov 28, 2006 | 03:59 PM
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You are only supposed to use stock heads with the TRex. Also, with an M6, 11's are going to be a challange even with a TRex and the supporting mods...they won't come easy just to let you know.
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Old Nov 28, 2006 | 04:02 PM
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yeah i know it won't be easy, but if it was, it wouldn't be that great of an acheivment when/if i did it...
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Old Nov 28, 2006 | 08:41 PM
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Originally Posted by Cyborg
You are only supposed to use stock heads with the TRex. Also, with an M6, 11's are going to be a challange even with a TRex and the supporting mods...they won't come easy just to let you know.

What do you mean only stock heads?
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Old Nov 28, 2006 | 08:49 PM
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Small valve, unmilled heads, or you have to notch the pistons.
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Old Nov 28, 2006 | 08:58 PM
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Oh, gotcha...
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Old Nov 28, 2006 | 10:28 PM
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Originally Posted by Cyborg
You are only supposed to use stock heads with the TRex. Also, with an M6, 11's are going to be a challange even with a TRex and the supporting mods...they won't come easy just to let you know.
I've seen 11's out of MUCH less than a Trex in a M6. You can use a much more streetable cam and achieve that N/A.
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Old Nov 28, 2006 | 11:25 PM
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Originally Posted by mwill15
I've seen 11's out of MUCH less than a Trex in a M6. You can use a much more streetable cam and achieve that N/A.
But who would do such a thing like that??
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Old Nov 29, 2006 | 12:48 AM
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Originally Posted by mwill15
I've seen 11's out of MUCH less than a Trex in a M6. You can use a much more streetable cam and achieve that N/A.
I agree.
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Old Nov 29, 2006 | 02:07 AM
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if the porting is $400 and lower for both the intake and exhaust it`s not a bad idea for a 15-25 hp atleast (not counting the lower rpms wich they call under the curve) increase and better torque and getting an advantage of the +600 lift. of course cnc`d 243 heads what is called budget heads or even aftermarket heads are better it depends how much you have now and when you`ll buy heads and if you`re willing to wait!

remember don`t mill the heads if not flycutting pistons.
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Old Nov 29, 2006 | 07:09 AM
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...don't even clean them up either. As for the porting, I wouldn't agree to it unless you see their flow bench and they've done several sets of LS1 heads previously.

Ben T.
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Old Nov 29, 2006 | 08:55 AM
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Originally Posted by mwill15
I've seen 11's out of MUCH less than a Trex in a M6. You can use a much more streetable cam and achieve that N/A.
I completely agree. I've seen consistent 11.6's out of a 224/224 M6 & ET Streets & excellent driving. I never recommeded the TRex, I was just stating that the cam 2000_SS wants to use, a TRex, is supposed to use stock heads, and IMO 11's are not easy for most cam-only M6's no matter what cam you use.
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Old Nov 29, 2006 | 09:44 AM
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Originally Posted by Cyborg
I completely agree. I've seen consistent 11.6's out of a 224/224 M6 & ET Streets & excellent driving. I never recommeded the TRex, I was just stating that the cam 2000_SS wants to use, a TRex, is supposed to use stock heads, and IMO 11's are not easy for most cam-only M6's no matter what cam you use.
That's only because most M6 cars don't have the luxury of running drag radials/slicks and leaving the line at 5500 RPM with a tough rear end. A good launch is paramount to getting in the 11s.

Ben T.
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Old Nov 29, 2006 | 10:50 AM
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Originally Posted by Studytime
That's only because most M6 cars don't have the luxury of running drag radials/slicks and leaving the line at 5500 RPM with a tough rear end. A good launch is paramount to getting in the 11s.

Ben T.
Not only because. Additionally, the T56 is very hard to shift fast, to find gears, often blows synchros/bends shiftforks/breaks stops etc. etc. when tracked, so a lot of people really need a rebuild & a good shifter like a 5.0 and then a lot of seattime and then slicks (or at least ET streets) with a great launch and good rear w/ 4.11's. A good launch is paramount to getting in the 11s, but so is finding 3rd gear and getting it in gear very quickly...and IMHO that is one of the more challanging aspects of getting into the 11's with a cam only car.
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Old Nov 29, 2006 | 12:14 PM
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thanks guys, i'll let you know how it turns out.....
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