I was just curious if this cam and head combo would work or am I going to be drowning out my LB9.

Summit TPI cam
Specifications:
* Advertised duration: 268 intake/278 exhaust
* Duration at .050 in. cam lift: 204 intake/214 exhaust
* Gross valve lift: .420 in. intake/.442 exhaust
* Lobe separation: 112 degrees
* This cam kit is designed for Pre-1987 non-roller camshaft TPI engines.

World S/R Torquer heads
Specifications:
* 58cc combustion chamber
* Valve size: 1.940 in. intake, 1.500 in. exhaust
* Rocker arm studs: 3/8 in.
* Valve springs: 1.250 in. single spring, .560 in. max lift

Any imput will be appreciated.

Thanks
Dan

 

I'm going to be using those same heads on my car. I am going with a bigger cam though. I'm going with a CompCam 218/224.

 

The cam and heads are fine. If you look in the tech info section at the LB9 roller cam for the 88 model year, you'll see that it's a bit beefer yet in terms of duration. You could go one step up from there. My LB9 idles real smooth but then the stock cams have a very large LSA.

One thing you might consider, is haveing a 1.6" exhaust valve put into those heads. I think one guy here put 1.94 and 1.6 valves into his 305 heads and it worked great.

 

I realize you are putting this cam in a 305, but I had it in a 355 and it was WEAK! If you're going to go into the engine put more cam in it. Remember:

If Some is good!

More is BETTER!

And too much is JUST ENOUGH!

 

Hey thanks guys for replyin', I'm gettin pretty excited about finishin' this thing.

 

You have and '86 right. IIRC you have to use a flat tappet cam like me. I would look at getting a set of 1.6 roller tip rockers. I am using 1.5 roller tips on mine but that's just because a friend is giving them to me for a really good price.

 

I ran that cam in my 86 IROC's 305 with the stock heads, if you're stepping up the heads I'd go with a slightly larger cam. See if you find something that specs out around 210/220 @.050, around .450/.460ish lift. I don't have a cam in mind, just something around there (or maybe slightly more lift if you can find something that isn't too much bigger on the duration).

Do you have headers and such already?

Edit, check out the CompCams XE256, it looks pretty good to me, 212/218 @.050, lift of .447/.454, try some 1.6s if your budget will allow (and you've already gotten headers)...

 

That 212/218 would be a good choice. If you plan to install a higher stall converter I would go with the 218/224 or 224/230.