What do I need to make a trex v2 cam work in my stock ls1?
08-28-2014, 01:38 PM
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What do I need to make a trex v2 cam work in my stock ls1? I know I will need a spring kit. But what size pushrods and shims will I need? What else will a I need for this swap that is recommended?
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08-28-2014, 06:05 PM
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Rod length and Shims Correct pushrod length is determined AFTER cam is installed (may have different base circle than stock) and AFTER length measurement is made. Shim or no shim is again determined by measurement of installed spring height. (different springs may or may not have the same installed height)
08-28-2014, 06:09 PM
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so there is no way to know before hand? I was hoping shane or someone that worked at thunder racing may have known from previous experience or someone with the same setup would know.
08-28-2014, 06:16 PM
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Trex Cam A cam with over .600 lift and over 240 duration would be a poor choice for a mostly stock LS1 with 853 heads. Save your $ for port work or a better set of heads before installing a "beastly" cam. (unless you are going for a nasty idle instead of making power across the band) 
08-28-2014, 07:04 PM
#14
It did it in a gutted car most likely and nowadays people really haven't gone after that record as I'm sure it could be beaten. The trex has super aggressive lobes, kills springs, has no low end, and drives like crap. Even Geoff who designed the cam for tr will tell you all this.
Now with his eps lobes you can get a cam that makes the same or more power and drives a lot better
Now with his eps lobes you can get a cam that makes the same or more power and drives a lot better
08-28-2014, 09:01 PM
#18
I'm saying it should drive a little better yes. However there's much more to how a cam drives than just duration. Your car has 22 degrees overlap and the other has 25 so yes it should but new lobe designs with less jerk and smoother ramp rates will make it drive better with the same overlap and make more power.... Like I said call Geoff and ask him how his new eps lobes compare to the trex HE designed
08-28-2014, 09:07 PM
#19
Want to know how to make it run "well?"
4.30 gears (or 4.56)
Ported heads with 58cc chambers & Cometic .040 gaskets (TFS 215s, PRC 227s, etc, or the TFS 220 or PRC 220s As Cast)
Flycut pistons
1-7/8" headers
3" true duals
FAST 102
underdrive pulley
Full rear suspension
drag radials (28" if 4.56)
4.30 gears (or 4.56)
Ported heads with 58cc chambers & Cometic .040 gaskets (TFS 215s, PRC 227s, etc, or the TFS 220 or PRC 220s As Cast)
Flycut pistons
1-7/8" headers
3" true duals
FAST 102
underdrive pulley
Full rear suspension
drag radials (28" if 4.56)
08-28-2014, 09:28 PM
#20
it holds or held the cam only record on a stock ls1. how is it a horrible cam?
Given your lack of supporting mods, yes it's a fuggin' horrible cam.