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Posted by: jmill Apr 9 2013, 07:54 PM

So I have a 2.2 T and 2.4 T engine. I can't come up with the cash for new S spec P&Cs right now. The short term plan was to use the 2.2 case (2.4 case needs more work) and the 2.4 crank, rods, P&Cs and whichever heads looked the best. Am I stuck with the T cams or can I get some more power with different cams?

Posted by: 914Sixer Apr 9 2013, 08:34 PM

I always liked E cams the best. Good low and mid range power for all around driving. If you go back and read the articles from the 70's R&T recommended the 911E over the S.

Posted by: JmuRiz Apr 9 2013, 08:52 PM

Are you using carbs or mfi?
If it's a 2.4T with mfi, I think you can run up to E cams with the T setup.
If carbs, I think you can run whatever cams you want (depending on where you want the powerband) with S P&Cs...might contact someone like Supertec to get opinions on the most aggressive cams for T P&Cs

Posted by: scotty b Apr 9 2013, 09:02 PM

Solex or E cams. S cams are nothing but top end. They don't come alive until around 4 grand. Once they come on the fun starts

Posted by: jmill Apr 9 2013, 09:22 PM

I only have T P&C's. Can they handle the heat and extra power produced by using the Solex or E cams? Will the extra lift on the valve clear the pistons?

Posted by: scotty b Apr 9 2013, 10:15 PM

I THINK you wil be o.k., but you should probably check with Mark henry, McMark or Krusty to be certain

Posted by: Cap'n Krusty Apr 9 2013, 10:16 PM

IME, and I confirmed this with Walt Watson at Competition Engineering, you're gonna have problems using E or Solex cams with T pistons. You don't have enough compression to take advantage of the grind. You may also have issues with piston to valve clearance. I have a nice set of near-new Engle E camshafts that came out of a recently rebuilt 2.2T that NEVER ran right after they were installed. They're for sale, BTW.

Save your wallet, DO YOUR HOMEWORK!

The Cap'n

Posted by: brant Apr 9 2013, 10:52 PM

The problem is going to mostly be the piston clearance.
you can grind valve pockets somewhat... but you may have to stick with the T cams until you buy different pistons.

its one of those things that you won't really 100% know if they can fit until you assemble. (kinda like big tires on a narrow bodied car)

The 2.2 pistons will give you higher compresson, but won't help the clearance a bit.
The 2.4 pistons might give you more wiggle room, but which ones are worn out?

Posted by: Mark Henry Apr 10 2013, 07:16 AM

QUOTE(Cap'n Krusty @ Apr 10 2013, 12:16 AM)

Posted by: Cap'n Krusty Apr 10 2013, 07:39 PM

Better make up your mind pretty fast. There's a guy from the PP site making interested noises .........................................

The Cap'n

Posted by: jmill Apr 12 2013, 08:13 PM

Thanks for the replies guys and the offer Capt'n. I think I'll just stick with the T cams and go with a straight T motor until I get the scratch for the S P&C's.

And yes, I am running Weber carbs.

Posted by: toolguy Apr 12 2013, 09:26 PM

T pistons with an E cam need and additional .040 cut on the valve pockets. Be sure and set the valve springs to E specs shims. . . the cut is minor and not any real lost compression. . Best combo I ever had was E pistons and Solex cams. . I built my last 2.0 six that way. . . It would out pull a factory 210 HP 911S on a long straightaway. .


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Posted by: rick 918-S Apr 12 2013, 09:29 PM

Good choice. I think unless your really ready to go full tilt the 2.2 will make a sweet song behind your head. When your ready to move up I may be in the market for your 2.2.