performance cam
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Joined: Nov 2014
Posts: 85
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From: HUDSON OHIO
performance cam
my brother has an '89 vette, and wants to know if it is possible to install a performance cam with slightly modified duration {to get the race type lumpy idle sound} without a lot of other mods.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
It is definitely possible. All he needs is "too much" overlap and he'll get "that sound" he's looking for. Comp even has a line of cams developed specifically for "the sound". 
It's their "Thumpr" series, I believe.
It's their "Thumpr" series, I believe.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Be careful how much duration you use or it won't function with the EFI. 230 / 236 and a 112 LSA is about as far as one should go and will require custom tuning. 224 / 230 would even be a better choice. Now, the stock TPI manifold is designed for low end power. Therefore a more appropriate cam choice would be 212 / 218 on a 112 or 218 / 224 on a 112 to work with the stock intake. There's a lot more to digest than just a big rowdy cam.
Completely.
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 195
From: folsom california
[QUOTE Therefore a more appropriate cam choice would be 212 / 218 on a 112 or 218 / 224 on a 112 to work with the stock intake. There's a lot more to digest than just a big rowdy cam.[/QUOTE]
that's pretty close to an LT4 Hot Cam; 0.525 lift with 1.6 rockers; 0.492 lift with 1.5 rockers on a 112 degrees lobe angle
that's pretty close to an LT4 Hot Cam; 0.525 lift with 1.6 rockers; 0.492 lift with 1.5 rockers on a 112 degrees lobe angle
