Ivan383

hey guys, I am still very indecisive regarding my cam selection for my 383 TPI(not built yet). My camaro has a '88 corvette L-98 with the factory aluminum heads, 700r4 tranny(B&M), 9-bolt(3:27)rear, probably going with a 2500 stall converter, headers(no cats), 3"flowmaster exhaust. The stroker kit I purchased comes with a eagle cast crank, eagle rods, kieth brown pistons, clevite rings, mogul bearings. I will be retaining the factory intake tpi set-up for now. The cam in question is the compcam cs-290hr-12(hyd roller) duration @.050lift 230/244, lift.510/.540, 112*lobe separation. Is this good for a street/strip application+daily summer driving? Please let me know of any other cams that might be better. Thanks!!


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'87 black Iroc,t-tops, with '88 vette 383 stroked TPI, headers with 3"flowmaster exhaust, aluminum driveshaft, 700R4 tranny with shift kit, 9-bolt borg warner posi-disc diff(3:27), k&n, eibach springs, removed all emmission controls, aftermarket chip, '95 Z28 seats, etc.

Glen

Well, even though you have a 383 I think the duration of your cam is a bit long. 220/230 with a minimum of 0.5 inch lift should be o.k. But...........your intake setup is going to have to go. You'll be choking your 383 to death with a stock TPI setup. Find out what the max lift is for your heads and be sure to have the correct valve springs if the the heads will handle it. Talk to the Comp Cam tech line and ask their advice. They are pleasant people to deal with and should be able to suggest a cam. You really need a superram, miniram, or ported manifold and aftermarket runners minimum for your 'big' small block. If you choose the cam you mentioned your rpm range is higher than the rest of the engine parts you own. If on the other hand you intend to go with larger diameter headers, higher flowing intake etc. reasonably soon, get the longer duration cam and build a higher rpm powerband mill. Then it will require a higher stall, different rear axle ratio etc. Isn't engine design fun. I went too conservative on my cam for fear of failing emissions here in Arizona. Instead of 206/210 I should have at least went with a zz3 cam with 208/221. Now it is a major chore to tear it down and it is my daily driver.

Sorry for the long post.

F-BIRD'88

That cam is too big for your application.
One of the smaller "TPI computer compatable" cams
would be a better choice.
You can get a free recomendation from Comp Cams
over the web. Tell them what you got, not what you're
getting, and they'll set you up with the right cam.
www.compcams.com

Cosmik Debris

Yeah, I agree with these guys, the 383 can take a big cam but the long TPI runners are going to limit the flow where that cam is really starting to move.