TREX lows #'s. Not Happy....
Thread Starter
On The Tree
Joined: Apr 2006
Posts: 144
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From: Elmhurst,IL
TREX low #'s. Not Happy.... Check out my sig for all my mods to date. I've heard a ton of good things about the Trex cam and now I've got one and I can't seem to get the numbers that everyone else has. Cam only tune was 375rwhp and about 365rwtq. Cam and heads was 402rwhp and about 380rwtq. Short block has new bearings, balanced rotating assembly with diamond forged pistons and it's almost newly done(about 1,000 miles) so i don't think it can be anything crazy in the bottom end. I only have the LS1 intake right now but even then i should see much better numbers. I don't know what else to do. 
Anyone got any ideas on what's going on? too conservative of a tune?
Anyone got any ideas on what's going on? too conservative of a tune?
Last edited by TheCarKid; Feb 23, 2007 at 12:30 PM.
Thread Starter
On The Tree
Joined: Apr 2006
Posts: 144
Likes: 0
From: Elmhurst,IL
Originally Posted by 00BlueTA
What cc heads did you buy and what size intake runner are they. If the intake runners are big or the comp ratio is too low you will produce low numbers.
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I tuned a cam-only LS1 with a T-Rex to 450 rwhp and 405 rwtq (of course, it had HVMC headers, FAST 90, and all the best bolt-ons). Cam-only, you should be higher than you are now. With ported heads, you should be even higher than that. Can you show us the graph? It would be interesting to see where you make peak power and torque and how your tq looks at 3000 rpm. Cam could be in at wrong centerline.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Originally Posted by PunkNPonys
The LS1 intake is costing you about 15-20rwhp so thats one problem. The car is probably starving for air.
Thread Starter
On The Tree
Joined: Apr 2006
Posts: 144
Likes: 0
From: Elmhurst,IL
Originally Posted by Patrick G
I tuned a cam-only LS1 with a T-Rex to 450 rwhp and 405 rwtq (of course, it had HVMC headers, FAST 90, and all the best bolt-ons). Cam-only, you should be higher than you are now. With ported heads, you should be even higher than that. Can you show us the graph? It would be interesting to see where you make peak power and torque and how your tq looks at 3000 rpm. Cam could be in at wrong centerline.
I'll see if I can find the dyno sheet. I cleaned out my garage over the winter but i might have it somewhere.
Thread Starter
On The Tree
Joined: Apr 2006
Posts: 144
Likes: 0
From: Elmhurst,IL
This was my latest dyno run.
2000 Trans Am M6
347-forged diamond pistons w/ -2cc valve reliefs
SLP Lid and smooth bellows
160* Thermostat
TSP Stg 1 LS6 CNC Ported heads
Trex Camshaft from Thunder Racing
LS1 Intake Manifold-stock injectors
Pacesetter LT's, ORY and SLP Loudmouth Catback
Stock 10 bolt w/ 4.10 gear
Last edited by TheCarKid; Feb 24, 2007 at 10:43 AM.
Hey your biggest problem is that fing ls1 intake. Swap it out for a ls6 intake. I bet you see over 30rwhp jump. That big cam likes to move air and the ls1 intake restricts it like CRAZY. Also whats your compression?
Thread Starter
On The Tree
Joined: Apr 2006
Posts: 144
Likes: 0
From: Elmhurst,IL
I'm gonna get a new intake in the near future. Compression ratio should be close to stock if not a lil lower with the -2cc valve reliefs. As far as actual cylinder compression i haven't checked it since before i put new pistons in it.