6 engine question, Cam choice with T engine Options

[jmill]

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?

[914Sixer]

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.

[JmuRiz]

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

[scotty b]

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 (IMG:style_emoticons/default/smile.gif)

[jmill]

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?

[scotty b]

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

[Cap'n Krusty]

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

[brant]

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?

[Mark Henry]

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

(IMG:style_emoticons/default/agree.gif) Best advice (IMG:style_emoticons/default/smile.gif)

Personally I'd take the Cap'n up on the E cams and find the proper pistons.
I'm assuming that you will be running carbs, correct?

[Cap'n Krusty]

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

The Cap'n

[jmill]

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.

[toolguy]

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. .

[rick 918-S]

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.