Will TRex work with stock LS1 heads with CNC job only?
04-23-2006, 12:29 AM
#1
Will TRex work with stock LS1 heads with CNC job only? I was curious-if I got a set of stock sized LS1 heads and sent them off to TSP or Patriot to be CNC'd would a TRex cam work with them? There would still be stock valves on them, etc. If it will work on a stock head I don't see why it wouldn't work on a stock ported head.
I figure this would be a much cheaper alternative than having to flycut the pistons for an aftermarket head. Let's hear opinions.
I figure this would be a much cheaper alternative than having to flycut the pistons for an aftermarket head. Let's hear opinions.
04-23-2006, 01:38 AM
#6
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ls6 head have a smaller combustion chamber then ls1 heads.....ls6 head =64.4 cc and ls1 =67cc.......this may become an issuae with a cam as large as the trex
04-23-2006, 02:14 AM
#7
it would be well worth it. last time I checked they will flow about 300 cfm at .600 lift if you have them port your stockers.
someone just asked that same question on here not too long ago and gunnar (patriot) said he could get the stockers to almost 300cfm @.600, quite a big improvement over stock.
if your tight for cash it would be a good way to go.
someone just asked that same question on here not too long ago and gunnar (patriot) said he could get the stockers to almost 300cfm @.600, quite a big improvement over stock.
if your tight for cash it would be a good way to go.
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04-23-2006, 02:44 AM
#8
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Originally Posted by Formula_Power
ls6 head have a smaller combustion chamber then ls1 heads.....ls6 head =64.4 cc and ls1 =67cc.......this may become an issuae with a cam as large as the trex
04-23-2006, 09:42 AM
#9
Ya bump on the PRC LS6 CNC head unmilled with stock valves-I would like to know that as well. I think I would rather go that route than sending off my stockers. I think there would be more power going with TSP's heads than a port on stockers. More opinions!
04-23-2006, 10:00 AM
#10
Originally Posted by SUX2BU
You should ask the head porters that.
I personally wouldn't waste my $$$ on something like that.
I personally wouldn't waste my $$$ on something like that.
As far as will they fit? Yes. Since youre not changing the valves from the stock location, they will move and function exactly as stock.
04-23-2006, 11:30 AM
#11
well what is your dilemma?
the more money you spend the more power you will make
the prc's will perform better than the ported stockers, but will cost more.
the afr's will perform better than the prc's, but will cost you more.
if you are worried about p to v than get the prc's if you got the extra money.
the more money you spend the more power you will make
the prc's will perform better than the ported stockers, but will cost more.
the afr's will perform better than the prc's, but will cost you more.
if you are worried about p to v than get the prc's if you got the extra money.
04-23-2006, 11:32 AM
#12
Originally Posted by UltraZLS1
well what is your dilemma?
the more money you spend the more power you will make
the prc's will perform better than the ported stockers, but will cost more.
the afr's will perform better than the prc's, but will cost you more.
if you are worried about p to v than get the prc's if you got the extra money.
the more money you spend the more power you will make
the prc's will perform better than the ported stockers, but will cost more.
the afr's will perform better than the prc's, but will cost you more.
if you are worried about p to v than get the prc's if you got the extra money.
04-23-2006, 01:37 PM
#13
Originally Posted by GuitsBoy
PRC's that have larger valves may not clear, even if theyre not milled.
Has anyone tried a Trex/PRC 243 stock vavle unmilled combo yet?? I'd definetly like to see if it fit and the results....
04-23-2006, 01:59 PM
#14
TECH Senior Member
If a T-Rex fits a LS6 motor (Z06 Vette) without issues, then it will fit unmilled stage 1 TSP/PP/Livernois LS2/LS6/243 castings. (stage 1 = stock valved)
Just remember that Thunder advises to check PTV anyways with T-Rex since not all of them come out exactly the same after grind.
Just remember that Thunder advises to check PTV anyways with T-Rex since not all of them come out exactly the same after grind.
04-23-2006, 03:16 PM
#15
The TSP/PP Stage 1 LS6 heads and a T-Rex would be nice. A small bump in compression and the extra flow would help out big time.
The other option is the Dart 205s or 225s. Improved PtV clearance and even more compression. Untouched, out of the box, both are flowing very well and the price is only slightly more than the Stg 1 LS6 heads.
The other option is the Dart 205s or 225s. Improved PtV clearance and even more compression. Untouched, out of the box, both are flowing very well and the price is only slightly more than the Stg 1 LS6 heads.
04-25-2006, 11:44 AM
#19
Originally Posted by DocEwww
Larger vavles definetly wont clear.
Has anyone tried a Trex/PRC 243 stock vavle unmilled combo yet?? I'd definetly like to see if it fit and the results....
Has anyone tried a Trex/PRC 243 stock vavle unmilled combo yet?? I'd definetly like to see if it fit and the results....
04-25-2006, 11:57 AM
#20
Originally Posted by RM99Z
I'm planning on going with a custom grind, very similar specs to the Trex but on a 114 lsa with 2 degrees of advance ground in the cam to help bring the peak power down a couple hundred rpm's (my car's a 99 - weaker rod bolts, and an auto with a 4400 convertor). This cam with the prc cnc'd ls6 heads w/ stock valves...should be interesting!!
No matter what, the cam will try to peak around 6300 because of the restriction of the intake manifold. It may not fall off for a while after that, but it will peak at 6300, but carry well past 7k rpm.
But in going with a cam like that, you give up quite a bit of area under the curve, because your VEs are set to fight against the peak the intake manifold restricts you to. A well designed cam with proper VEs that actually is set to peak at 6300 will carry power to 7k just as easy but make a ton more power under the curve. But that means either lower duration or a much tighter LSA, which will make it a pain in the *** to drive because of the huge overlap. I'm talking 106 LSA or so.