January 20, 2021, 08:49:12 AM

Author Topic: CAM Question  (Read 390 times)

Offline Venom13132

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CAM Question
« on: January 06, 2021, 08:19:51 AM »
I have my engine out of the car to paint the engine bay.

I cam across a cam for sale locally for $150.  Its a COMP CAMS cam.

Specs listed in the photo:

on the box
400"  233/237  .605/.610  118/5

end of the cam end
076226-17
13777R 13780R
HR 118. 0 5

Not sure if that cam would be a nice upgrade for my stock 2002 LS1.  I figure I would need some springs and retainers that support the lift as well and a tune afterwards. 

Thoughts?
1995 RX-7 - LS1, T56: Feed wide body, Feed CF Side skirts, 57DR 18's, K-Sport coilovers, 99 spec\ tails and spoiler, SpeedHut, Aeromotive, TwinZ Diffuser
2010 Cadillac Escalade: Daily Driver and pulls my 18' car hauler

Offline Exidous

Re: CAM Question
« Reply #1 on: January 06, 2021, 10:30:00 AM »
I'd check which lobe is being used. Comp has a pretty wide range. Some being very aggressive.

That's a pretty beefy cam but tamed by the LSA. Only about .5į of overlap. You'll need springs, pushrods, trunion upgrade and probably lifters. You'll also want to check piston to valve clearance.
94 BB Sleeved gen IV LS7, MS3ProU with TC, RONIN 8.8 and LT's with custom 3.5"single to VAREX muffler.

Offline digitalsolo

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Re: CAM Question
« Reply #2 on: January 06, 2021, 11:24:14 AM »
Yeah thatís a pretty healthy cam.    Iíd probably go smaller, but thatís just my opinion.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
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Offline MPbdy

Re: CAM Question
« Reply #3 on: January 06, 2021, 11:57:24 AM »
That's better for a stealthy stroker cam with cathedral heads.  In a stock LS1 there are better choices. 

https://briantooleyracing.com/btr-camshaft-ls1-ls2-n-a-stage-2-32734132-32734133.html

This is a much better choice.

Offline Venom13132

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Re: CAM Question
« Reply #4 on: January 06, 2021, 11:58:12 AM »
ahh good to know.  My old FD i put a T-Rex V2 cam in that  it is - 242/248 - .608/.612 - 110LSA.  I just got that car running for the current owner.  It's basically a stock (rebuilt LS1) with Springs, lifters, pushrods, retainers, oil pump, timing chain.  Just had it tuned a month ago.  It sounds nasty and runs good!.    Piston clearance only needed to be checked with aftermarket heads according to thunder racing on that cam. 

That cam i found has similar lift but lower duration, and much higher LSA.  The higher LSA should give smoother idle, correct?     

So i would guess this cam would be just a tad milder than the nasty T-Rex cam

1995 RX-7 - LS1, T56: Feed wide body, Feed CF Side skirts, 57DR 18's, K-Sport coilovers, 99 spec\ tails and spoiler, SpeedHut, Aeromotive, TwinZ Diffuser
2010 Cadillac Escalade: Daily Driver and pulls my 18' car hauler

Offline Venom13132

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Re: CAM Question
« Reply #5 on: January 06, 2021, 12:10:48 PM »
That's better for a stealthy stroker cam with cathedral heads.  In a stock LS1 there are better choices. 

https://briantooleyracing.com/btr-camshaft-ls1-ls2-n-a-stage-2-32734132-32734133.html

This is a much better choice.



I also dance with the idea of upgrading from an LS1 to an LS3 opposed to building the LS1.  I don't know which is more cost effective for power.   I don't really have big power goals for the car.  I am just having fun with it.
That cam i listed in the original post is only $150 and i can probably get it for less with cash and its local.  Just thinking of ways to save a few $$ over buying new.   That cam is in basically new condition. 

I should probably just wait till i have a better idea what i want to do for power on this car!
1995 RX-7 - LS1, T56: Feed wide body, Feed CF Side skirts, 57DR 18's, K-Sport coilovers, 99 spec\ tails and spoiler, SpeedHut, Aeromotive, TwinZ Diffuser
2010 Cadillac Escalade: Daily Driver and pulls my 18' car hauler

Offline MPbdy

Re: CAM Question
« Reply #6 on: January 06, 2021, 12:48:26 PM »
Yeah it is nice that it is cheap but the powerband would be all wrong for your ls1.  It'd have shit bottom end torque and probably not drive very well.

The cam you're asking about would be WAY milder than the T-Rex cam being ~25 degrees less overlap it just doesn't have the right valve timing for an ls1 (overlap = idle chop, noise level, raw exhaust smell, bucking etc). 

If you can swing it the ls3 is a way better upgrade than modifying your ls1.  A stock ls3 with headers will make more power and torque than a lot of modified ls1's, and if you modify it you can be anywhere from 450whp up to 550whp+ NA.

Offline Venom13132

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Re: CAM Question
« Reply #7 on: January 06, 2021, 12:51:50 PM »
Yeah it is nice that it is cheap but the powerband would be all wrong for your ls1.  It'd have shit bottom end torque and probably not drive very well.

The cam you're asking about would be WAY milder than the T-Rex cam being ~25 degrees less overlap it just doesn't have the right valve timing for an ls1 (overlap = idle chop, noise level, raw exhaust smell, bucking etc). 

If you can swing it the ls3 is a way better upgrade than modifying your ls1.  A stock ls3 with headers will make more power and torque than a lot of modified ls1's, and if you modify it you can be anywhere from 450whp up to 550whp+ NA.

this is probably what i needed to hear. haha.  Thanks!
1995 RX-7 - LS1, T56: Feed wide body, Feed CF Side skirts, 57DR 18's, K-Sport coilovers, 99 spec\ tails and spoiler, SpeedHut, Aeromotive, TwinZ Diffuser
2010 Cadillac Escalade: Daily Driver and pulls my 18' car hauler

Offline N3BP

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Re: CAM Question
« Reply #8 on: January 07, 2021, 08:34:26 PM »
I run a TSP 233/239, .600/.600, 112LSA and you have to feather the clutch a good bit when cruising at low RPM or idle.  It's still lopy up to about 3K.  I'm sure a proper tune will remove some of that, but you're not gonna like being stuck in low rpm situations with that T56!
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Offline Venom13132

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Re: CAM Question
« Reply #9 on: January 08, 2021, 08:51:52 AM »
well i have my old car with the T-Rex available for me to play with so I can decide if i like that or just go with my long term goal and do an LS3 with some boost.
1995 RX-7 - LS1, T56: Feed wide body, Feed CF Side skirts, 57DR 18's, K-Sport coilovers, 99 spec\ tails and spoiler, SpeedHut, Aeromotive, TwinZ Diffuser
2010 Cadillac Escalade: Daily Driver and pulls my 18' car hauler