 6 engine question, Cam choice with T engine |
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| jmill |
 Apr 9 2013, 07:54 PM
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#1
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Green Hornet  Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest  |
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?
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Replies(1 - 12)
| 914Sixer |
Apr 9 2013, 08:34 PM
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#2
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914 Guru Group: Members Posts: 8,912 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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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.
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| JmuRiz |
Apr 9 2013, 08:52 PM
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#3
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914 Guru Group: Members Posts: 5,435 Joined: 30-December 02 From: NoVA Member No.: 50 Region Association: MidAtlantic Region
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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 |
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| scotty b |
Apr 9 2013, 09:02 PM
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#4
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rust free you say ? Group: Members Posts: 16,375 Joined: 7-January 05 From: richmond, Va. Member No.: 3,419 Region Association: None |
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)
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| jmill |
Apr 9 2013, 09:22 PM
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#5
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
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?
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| scotty b |
Apr 9 2013, 10:15 PM
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#6
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rust free you say ? Group: Members Posts: 16,375 Joined: 7-January 05 From: richmond, Va. Member No.: 3,419 Region Association: None |
I THINK you wil be o.k., but you should probably check with Mark henry, McMark or Krusty to be certain
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| Cap'n Krusty |
Apr 9 2013, 10:16 PM
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#7
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
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 |
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| brant |
Apr 9 2013, 10:52 PM
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#8
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914 Wizard Group: Members Posts: 11,641 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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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? |
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| Mark Henry |
Apr 10 2013, 07:16 AM
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#9
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Cap'n Krusty @ Apr 10 2013, 12:16 AM)  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? |
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| Cap'n Krusty |
Apr 10 2013, 07:39 PM
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#10
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Better make up your mind pretty fast. There's a guy from the PP site making interested noises .........................................
The Cap'n |
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| jmill |
Apr 12 2013, 08:13 PM
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#11
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
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. |
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| toolguy |
Apr 12 2013, 09:26 PM
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#12
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Senior Member Group: Members Posts: 1,270 Joined: 2-April 11 From: San Diego / El Cajon Member No.: 12,889 Region Association: Southern California
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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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| rick 918-S |
Apr 12 2013, 09:29 PM
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#13
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Hey nice rack! -Celette Group: Members Posts: 20,506 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region
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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.
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