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Old 06-02-2006, 07:23 PM   #1
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Question Summit TPI Cam and Lifter Kit - Any Good?

Just wondering what this kit would do for my 350 tpi (internally stock, has LT's and !AC and !smog pump.) Would it be worth the $130 for a SOTP fun factor and/or sound improvement?

The Link

268 int./278 ex, 112 seperation. (I think I got the needed #'s?)

Thanks!
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Old 06-02-2006, 07:46 PM   #2
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Re: Summit TPI Cam and Lifter Kit - Any Good?

That is a flat tappet cam. The 1989 350 IROC would have come with a roller cam. Need some clarification.
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Old 06-03-2006, 10:29 AM   #3
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Re: Summit TPI Cam and Lifter Kit - Any Good?

Summit cams aren't bad cams, alot of them ar ehte tried and true grinds (204/214) , but there are alot of newer cams out there now that will do alot better. Try a comp cam xe grind or the new lunati voodoo series. The lobe profiles of those cams are great. I personally have a XE268H-10 in my monte which is my daily driver. And 89TransAmGTA is right 89 should be a roller motor and xe's and voodoo's are availible as rollers.

-Jim
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Old 06-04-2006, 09:56 AM   #4
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Re: Summit TPI Cam and Lifter Kit - Any Good?

So I need to find a mechanical roller? What's a decent grind (I did use the search function, didn't find anything applical to a stock tpi) for a stock tpi where I won't have to reprogram everything?

Thanks a bunch!
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Old 06-04-2006, 11:17 AM   #5
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Re: Summit TPI Cam and Lifter Kit - Any Good?

just a question about rollar cam motors
is the 89 305 IROC roller as well??
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Old 06-04-2006, 11:32 AM   #6
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Re: Summit TPI Cam and Lifter Kit - Any Good?

Quote:
Originally Posted by Black305RS
just a question about rollar cam motors
is the 89 305 IROC roller as well??
yes, it should be


and these are hydrualic roller, not mechanical
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Old 06-06-2006, 09:16 AM   #7
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Re: Summit TPI Cam and Lifter Kit - Any Good?

I used the Summit TPI Cam in a 305 with SLP Runners. This was in an 86 non roller Block. With a Hypercrap Chip it ran very well, made a noticeable change in power and RPM range. Also changed the exhaust note. It was part of what I used to get a 305 to run 13.9 with a 2.77 rear end.
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Old 06-06-2006, 09:57 PM   #8
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Re: Summit TPI Cam and Lifter Kit - Any Good?

Do a search on the GM Hot Cam. Pretty healthy cam with near stock street manners. Not sure if you'll need some modifications for this though but lots of info available on this swap. About the best there is for a mild/stock engine from what I've read.
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Old 06-06-2006, 10:38 PM   #9
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Re: Summit TPI Cam and Lifter Kit - Any Good?

Tom the LT4 Cam is a very good cam, but will not match a TPI intake well. The Hot cam is designed to run up to around 6400RPM, the stock TPI runs out of breath at 4500rpm, some even say 4200rpm.

BTW, I grew up in Wheelersburg, glad to see someone holding down the F-bodies up there.
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Old 06-06-2006, 10:38 PM
 
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