Cam
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
Congrats! What year C4? what System? factory EFI or Carb. Flat or Roller? if EFI. sorry, scrap your idea of a Choppy/lopped cam. without proper components & Mandatory tuning. is like trying to drive a boat up a waterfall.
Team Owner
Joined: Jul 2004
Posts: 28,376
Likes: 3,260
From: Hartford WI
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 112
From: Michigan
Depends on your deff of choppy? Modern EFI can handle more cam, but then your gonna spend a lot of $ on the EFI system.
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Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Max for use with a 350 is 230 / 236 @ .050 with a 112 LSA. Anymore than that can't be tuned. Now, if we think about the low RPM benefit of the TPI manifold it is smarter to cam it to the manifold. 218 / 224 on a 112 makes more sense. I get call after call from people where a kid on the phone from Comp said this Thumper series works great. 236 / 244 on a 107. I laugh and say go buy a carb.
Team Owner
Joined: Jul 2004
Posts: 28,376
Likes: 3,260
From: Hartford WI
At that point, I'd definitely change springs and valve stem seals. A lumpy cam is going to need to be tuned to run right which is a waste of money and time assuming it can be done and run right. They do make sound recordings that you can play over the stereo system that sounds choppy for a lot less. Driving down the street, I doubt that the rice boys will know better.
Team Owner
Joined: Jul 2004
Posts: 28,376
Likes: 3,260
From: Hartford WI
Max for use with a 350 is 230 / 236 @ .050 with a 112 LSA. Anymore than that can't be tuned. Now, if we think about the low RPM benefit of the TPI manifold it is smarter to cam it to the manifold. 218 / 224 on a 112 makes more sense. I get call after call from people where a kid on the phone from Comp said this Thumper series works great. 236 / 244 on a 107. I laugh and say go buy a carb.
Much cheaper than a carb. If you want to splurge, well http://www.soundracer.se/?p=98&p2=505
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
http://www.instantsupercar.com/ and for $1.99, it too can be yours. Much cheaper than a carb.
If you want to splurge, well http://www.soundracer.se/?p=98&p2=505
Much cheaper than a carb. If you want to splurge, well http://www.soundracer.se/?p=98&p2=505
Team Owner
Joined: Jul 2004
Posts: 28,376
Likes: 3,260
From: Hartford WI
Didn't mean anything offensive to you by it. I might have inadvertently cheapened the question about the sound but I didn't mean to cheapen the sound advice from you concerning the sound of the car.
Burning Brakes
Joined: Mar 2003
Posts: 1,174
Likes: 6
From: NW MN
I have a Comp Cams XE-265h-14 that I just took out of my 86.
It's in great shape with about 10K miles on it. It is not too aggressive but does idle with a bit of lope. It did run on the stock chip but a good tune would really get it dialed in. With the stock chip the car ran a best of 13.5 in the 1/4.
It's in great shape with about 10K miles on it. It is not too aggressive but does idle with a bit of lope. It did run on the stock chip but a good tune would really get it dialed in. With the stock chip the car ran a best of 13.5 in the 1/4.
Burning Brakes
Joined: Jan 2000
Posts: 831
Likes: 31
From: Merritt Island Florida
TPIS ZZ9 and GM ZZ4 with new springs 1.6 rockers intake and 1.5 on exhaust will provide some chop and work well on mostly stock motor. Zz4 likes 2 degrees of timing added and idle raised 200 rpms
Team Owner
Joined: Jul 2004
Posts: 28,376
Likes: 3,260
From: Hartford WI
Team Owner
Joined: Sep 2003
Posts: 20,172
Likes: 672
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
OK, rennertristan.
Here's the ticket CompCams XE262H-10 cam, include a set of their 1:6 roller tip rockers, Springs and lifters, plus their timing gear and chain set. Throw in a new set of valve seals while your in there.
Then get a tune from MrWillys. He might even have a copy of the one he burnt for me.
You'll get a nice idle that sounds like it's a Corvette and great mid-hi end performance from an otherwise stock TPI setup.
Here's the ticket CompCams XE262H-10 cam, include a set of their 1:6 roller tip rockers, Springs and lifters, plus their timing gear and chain set. Throw in a new set of valve seals while your in there.
Then get a tune from MrWillys. He might even have a copy of the one he burnt for me.
You'll get a nice idle that sounds like it's a Corvette and great mid-hi end performance from an otherwise stock TPI setup.
Team Owner
Joined: Sep 2003
Posts: 20,172
Likes: 672
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Oh, and I should add that there is NO machining required.
You can even use the stock valve covers with out modification.
Best package, reasonable price.
You can even use the stock valve covers with out modification.
Best package, reasonable price.
Team Owner
Joined: Jul 2004
Posts: 28,376
Likes: 3,260
From: Hartford WI
OK, rennertristan.
Here's the ticket CompCams XE262H-10 cam, include a set of their 1:6 roller tip rockers, Springs and lifters, plus their timing gear and chain set. Throw in a new set of valve seals while your in there.
Then get a tune from MrWillys. He might even have a copy of the one he burnt for me.
You'll get a nice idle that sounds like it's a Corvette and great mid-hi end performance from an otherwise stock TPI setup.
Here's the ticket CompCams XE262H-10 cam, include a set of their 1:6 roller tip rockers, Springs and lifters, plus their timing gear and chain set. Throw in a new set of valve seals while your in there.
Then get a tune from MrWillys. He might even have a copy of the one he burnt for me.
You'll get a nice idle that sounds like it's a Corvette and great mid-hi end performance from an otherwise stock TPI setup.
What exactly does that mean? Stock form, it sounds exactly like a Corvette that was produced.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
A stock L98 cam has a peak HP of right at 4200 to 4400. This cam brings that upwards of 5000 to 5200. This mod also dispelles the rumors that TPI runs out of power at 4500. It's small enough to compliment the lower end power of the longtube design manifold and with the much tighter LSA it hits much harder than the wide LSA of a stock L98 at 115. It can also be used with stock springs.
Last edited by MrWillys; Apr 17, 2016 at 08:37 AM.