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daily driven trex or similar cam...

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Old 01-22-2006, 06:01 PM
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Question daily driven trex or similar cam...

ok looking into another ls1 car. im thinking the trex cam for my daily driver. my only concern is finding the right spring so that i dont have to tighten them up every so many miles. so what springs are you running and what else should i replace? ive seen people change oil pumps, timing chains? could i get away with just the cam swap and valvetrain? thanks for the advice.

basically what i want is a nice strong daily driven cam+bolt car with a shot of nitrous in the future.
Old 01-22-2006, 06:29 PM
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Unless you are prepared to run badass valve springs and do comprehensive driveability tuning, you will not enjoy the T-Rex in a daily driver. This is an extreme cam and requires a lot of attention to detail. It's not a drop in deal. Tuning is critical with this cam. Comp 921s are some of the best springs to run. Next would be the PP/PRC/Manley duals. You'll need to shim them to within .050" of coil bind for maximum life. Again, attention to details.
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Old 01-22-2006, 08:25 PM
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Originally Posted by Patrick G
Unless you are prepared to run badass valve springs and do comprehensive driveability tuning, you will not enjoy the T-Rex in a daily driver. This is an extreme cam and requires a lot of attention to detail. It's not a drop in deal. Tuning is critical with this cam. Comp 921s are some of the best springs to run. Next would be the PP/PRC/Manley duals. You'll need to shim them to within .050" of coil bind for maximum life. Again, attention to details.
thanks patrick thats the information i need to not get this cam. i believe i will use the hpe "s" cam. i just really want a strong cam only plus bolt on car for now then the nitrous later.
Old 01-22-2006, 08:29 PM
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If you dont mind changing/checking the springs often, a big cam really isnt that bad for daily driving.

my g5x4 (110lsa)on a great tune was actually more driveable than my 224 cam on a 112 with a mediocre tune.
Old 01-22-2006, 08:35 PM
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Originally Posted by xttc2000
my g5x4 (110lsa)on a great tune was actually more driveable than my 224 cam on a 112 with a mediocre tune.
Thats insane.

Checkout the TSP MS3 and the S Cam...both great cams.
Old 01-22-2006, 09:48 PM
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leaving the ls1 community and going back ford oh well the ford is paid for.
What's up with this?
Old 01-22-2006, 10:04 PM
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Originally Posted by Bird-Of-Prey
What's up with this?
that was a long time ago man. never updated the sig. ive got the rustang now. its too slow,its automatic and i miss the t-tops. i want a 6spd car next.
Old 01-23-2006, 03:47 AM
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You will want to replace the LS1 timing chain, when you pull it out, you will see why

The LS2 timing chain is plenty strong and only 30 bux, plus it works with stock sprockets

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I think it's crazy to to a cam swap w/out a ported pump myself. Thats like buying a bently and putting hubcaps on it.
Old 01-23-2006, 04:08 AM
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Originally Posted by TheBlurLS1
You will want to replace the LS1 timing chain, when you pull it out, you will see why

The LS2 timing chain is plenty strong and only 30 bux, plus it works with stock sprockets

SDPC ----->

I think it's crazy to to a cam swap w/out a ported pump myself. Thats like buying a bently and putting hubcaps on it.
Yeah he pretty much has the right idea here.
Old 01-23-2006, 08:29 AM
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Originally Posted by stevensLS1
ok looking into another ls1 car. im thinking the trex cam for my daily driver. my only concern is finding the right spring so that i dont have to tighten them up every so many miles. so what springs are you running and what else should i replace? ive seen people change oil pumps, timing chains? could i get away with just the cam swap and valvetrain? thanks for the advice.

basically what i want is a nice strong daily driven cam+bolt car with a shot of nitrous in the future.
what's this all about? Are you under the mistaken impression that we have solid lifters in our cars and need to check lash every so often, or do the aggressive lobes/lifts of the Trex actually back the rocker arm nut out over time?
Old 01-23-2006, 09:56 AM
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Originally Posted by Zeus
what's this all about? Are you under the mistaken impression that we have solid lifters in our cars and need to check lash every so often, or do the aggressive lobes/lifts of the Trex actually back the rocker arm nut out over time?
I think he's referring to the springs wearing out and having to shim them to get back his lost seat pressure.

If you can say your cam backed out the rocker arm bolts, you've got one badass cam
Old 01-23-2006, 10:05 AM
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Originally Posted by TheBlurLS1
I think he's referring to the springs wearing out and having to shim them to get back his lost seat pressure.

If you can say your cam backed out the rocker arm bolts, you've got one badass cam
no kidding, I could barely get the rocker arm bolt backed out with a big wrench. I just couldn't see how else the springs could loosen due to a cam unless the spring started tunneling through the head.
Old 01-23-2006, 10:39 AM
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Originally Posted by Zeus
what's this all about? Are you under the mistaken impression that we have solid lifters in our cars and need to check lash every so often, or do the aggressive lobes/lifts of the Trex actually back the rocker arm nut out over time?
ive just heard that you have to adjust the springs due to the big lift on these cams. i just want a cam that i can throw in and not worry about the springs until they need to be replaced.
Old 01-23-2006, 02:35 PM
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Originally Posted by stevensLS1
i just want a cam that i can throw in and not worry about the springs until they need to be replaced.
you might have a hard time with doing so on the T-Rex. But who knows. People carry those cams of that caliber into 2X,XXX miles on the same springs.




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