My stock T5 clutch is 10.5" and uses a 153th flywheel IIRC. I'm thinking of converting it to a 168th flywheel. What size clutch do they use..11" or 12"? Also, how much grip advantage does a larger one really have?

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

as my wife always says bigger really is better. do the math, you gain a lot more surface area going from 10.5 to 12" the preasure plate also is part of the whole system. i'd run the biggest i could in a mc leod clutch

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

Your wife just says that because she's been with me and doesn't care about massaging your ego

 

They use an 11" clutch. And they won't fit in a stock F-body bell housing.

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"So many Mustangs, so little time..."
ICON Motorsports

 

Well I guess that answers that. Out of curiosity..what does the 12" clutch I've seen listed fit?

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

Jester, that's a truck clutch, I used one in a '67 Camaro some years back, a 6cyl to 302 swap. That monster flywheel hurt my throttle response quite a bit, but it did cut down my rpm drop at launch.
It also required a bigger bellhousing, and a bellhousing-mounted starter.
That was 20-odd years ago, and I used it because I had it laying around the garage, and I was looking for all the clamping force I could get! I have to wonder, though, if the mass of that flywheel contributed to breaking the crankshaft in that engine... I replaced it with a 350 and a standard clutch setup, with much-improved throttle response. The 350 actually revved faster than the 302 with the heavy flywheel (with the same intake & cam!)



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Zslug

May the road rise to meet your treads...

'84Z, 5sp, stock 305, Edelbrock intake, GTA wheels

 

Yah, 153 tooth is the biggest flywheel that will fit in a T5 bellhousing. Get a McLeod 11" clutch and be happy.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
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