upgrade cam
Thread Starter
Cruising
Joined: Oct 2008
Posts: 11
Likes: 0
From: DeLand Florida
upgrade cam
I am having the TPI engine from my '87 conv. freshened up. Everything will be stock except for the camshaft. How far can I go without screwing with the computer or injectors? Thanks.
Chuck
Chuck
Melting Slicks
Joined: Mar 2008
Posts: 2,141
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From: Santa Maria, CA
When I got my 85 it was stock with the exception of the cam. The previous owner installed a Competition Cam 260 grind (212/218) and roller rockers. It had the original chip. Anything larger will likely reduce your low end power with no upper end gain. I ended up running that cam with a Super Ram intake, AFR heads and TPiS headers. It made good power with lots of low end torque.
Le Mans Master
Joined: Jun 2006
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From: One day you're a Comet...the next day you're dust... Arkansas
Something with specs like the TPiS ZZ9 will boost performance with TPI.
Since you have it apart why not drop in a cam. Even with a MAF car you should get a tune.
Since you have it apart why not drop in a cam. Even with a MAF car you should get a tune.
Race Director
Joined: Jun 1999
Posts: 14,924
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From: Merritt Ils Fl
How perfect on tune do you want to be? BADDUK is correct but your TPI system will accept some substantial mods without a tune being essential. Yes there will be ponies on the table but not as many as you might think.
Safety Car
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From: Glenbeulah Wi
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Team Owner
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From: Athens AL
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Change the valve springs out and put in a ZZ9 or 211 camshaft, then have someone like PCMforless or Ed Wright do your chip. You can do other things later to improve from there.
Chips are really needed when you start messing with the cam. Other intake and exhaust mods don't necessarily require it but the cam will want a custom tune.
Chips are really needed when you start messing with the cam. Other intake and exhaust mods don't necessarily require it but the cam will want a custom tune.
Thread Starter
Cruising
Joined: Oct 2008
Posts: 11
Likes: 0
From: DeLand Florida
Chuck
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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ZZ4 is a GM performance parts piece, can be had anywhere.
ZZ9 is a TPiS cam, only get it from them.
You need to change springs no matter what, and yes you will want a chip for a ZZ9.
ZZ9 is a TPiS cam, only get it from them.
You need to change springs no matter what, and yes you will want a chip for a ZZ9.
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