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Which cam would you go with?

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Old Aug 4, 2006 | 05:59 PM
  #1  
87350IROC's Avatar
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From: Everett, WA
Car: 87' IROC
Engine: L98
Transmission: T56
Which cam would you go with?

My combo:
L98, stock stroke
Trickflow 195s
SLP headers
accel manifold
as&m runners
10:1
700r4 trans
3.27 9 bolt

Currently the motor has a ZZ4 cam. The new combo (above) may like something more. I was thinking maybe LPE 211, 216, 220, or zz9. Any thoughts? How much better do you think it will run compared to the ZZ4 that i already have?

I like the duration of the 216 - 213/219 but it only has .493/.502" lift with 1.6 rockers. I have 1.52 rockers. So i guess my favorite so far is the 211. But it really isn't that much more aggressive than the zz4.

Thoughts?

Thanks
John
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Old Aug 4, 2006 | 10:14 PM
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1989GTATransAm's Avatar
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Check out the Comp Cams XFI218.
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Old Aug 4, 2006 | 10:39 PM
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cam

im going for the same set up but dont no which cam help
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Old Aug 5, 2006 | 12:06 AM
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87350IROC's Avatar
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From: Everett, WA
Car: 87' IROC
Engine: L98
Transmission: T56
Originally Posted by 1989GTATransAm
Check out the Comp Cams XFI218.
Is this it?
COMP Cams Xtreme Fuel Injected Camshafts: CCA-12-466-8 - summitracing.com
I couldn't find anything called XFI218
If that is it that is more lift than my heads can take, and more lift than i want to run.
0.570 int./0.565 exh. lift
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Old Aug 5, 2006 | 01:10 AM
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Car: 1987 Formula (original owner)
Engine: 305 TPI
Transmission: T5
Axle/Gears: 9-bolt/3.45
That's it. It's 268, not 218. I think he typo'd.

And yeah, it seems like it would be a great cam, and it produces some excellent results on the Desktop Dyno(DD). Its durations are just about perfect for the TPI combo's that most of us put together. But the lifts are a bit too high for some.

There's another CompCam that has identical durations, but with much less lift, and it actually produces slightly better results on the DD. It's the XR269HR.

After months of DD testing of this and similar cams with many different TPI combo's similar to yours, the XR269HR with 1.5 rockers consistently produced some of the best results--even over cams with larger durations/lifts. It peaks a little, but not much, higher with 1.6 rockers, but it drops-off a little more quickly, too. Whereas with 1.5 rockers it seems to maintain its peak longer and drop-off less radically. Either way, it should match-up well with your Trick Flows and would be a great choice, IMO. It will prolly be my choice whenever cam-time rolls around.

Granted, DD results are theoretical. But I've tested it by running combos that are backed by real dyno results, and after removing a fwhp-to-rwhp loss factor estimate(because DD's figures are based on fwhp), DD's results are almost dead-on. So as long as you input the right data, DD is pretty accurate--and it's LOTS of fun play with!!!

Last edited by LAFireboyd; Aug 7, 2006 at 12:19 PM.
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Old Aug 5, 2006 | 09:34 AM
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From: Everett, WA
Car: 87' IROC
Engine: L98
Transmission: T56
Originally Posted by LAFireboyd
That's it. It's 268, not 218. I think he typo'd.
Granted, DD results are theoretical, but as long as you input the right data, it tends to be pretty accurate. And it's LOTS of fun play with!!!
Yes I hear that. Unfortunatley i've been away from my main computer for about 9 months now, so i don't have access to DD. So i'm trying to get all my parts nailed down so i can build and run the motor in the two week period i am home.

Thanks for the help, i will check out that other cam.
John
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Old Aug 6, 2006 | 12:54 PM
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1989GTATransAm's Avatar
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Those specs on the XFI cam are with 1.6 rockers. If you run 1.5 or 1.52 rockers you heads will most likely handle the lift. With the dual spring version of the Trickflow heads they will handle up to .600 lift. Sounds like you got one of the single spring versions.
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Old Aug 6, 2006 | 05:13 PM
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87350IROC's Avatar
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From: Everett, WA
Car: 87' IROC
Engine: L98
Transmission: T56
Originally Posted by 1989GTATransAm
Those specs on the XFI cam are with 1.6 rockers. If you run 1.5 or 1.52 rockers you heads will most likely handle the lift. With the dual spring version of the Trickflow heads they will handle up to .600 lift. Sounds like you got one of the single spring versions.
That is correct, single spring, .540" lift max. Why? because i don't want to run anything more aggressive than that anyway. Weird they quote the cam with 1.6 rockers. Even at 1.52 that is more lift than my heads can take.
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Old Aug 7, 2006 | 12:55 AM
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Originally Posted by 87350IROC
That is correct, single spring, .540" lift max. Why? because i don't want to run anything more aggressive than that anyway. Weird they quote the cam with 1.6 rockers. Even at 1.52 that is more lift than my heads can take.
IS THAT RUNING AC IN YOUR CAR IN STOCK BRAKES
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Old Aug 7, 2006 | 08:11 AM
  #10  
87350IROC's Avatar
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From: Everett, WA
Car: 87' IROC
Engine: L98
Transmission: T56
Originally Posted by big_nick_kgm
IS THAT RUNING AC IN YOUR CAR IN STOCK BRAKES
Sorry Nick I do not understand what you are asking. My car does have air conditioning and stock brakes.
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Old Aug 7, 2006 | 03:30 PM
  #11  
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From: Lancaster, CA.
Car: '92 Camaro RS
Engine: 355 TPI
Transmission: Tremec T-56
Axle/Gears: 10 bolt/3.42
I am very happy w/ the ZZ9 cam.
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