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Old 04-04-2014, 09:31 AM   #1
volvo 4 life
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Default Best clutch for 79 242 turbo and M47?

I currently have an M45 in my 1979 242 that I converted to lh2.2 and has a 13c. Right now the boost is set to only the stock 7 psi because anything over that causes the stock 8.5 inch N/A clutch to slip. I have a 91 244 parts car that I'm taking the m47 out of to put in mine so I have a 5th gear and was thinking of also using the dog dish flywheel so I could use the bigger clutch. I have plans of eventually going to a T5 transmission so I dont want to spend a ton of money on an overbuilt clutch for the M47 but I need something that will hold up to its limit, so something that's good to about 250 hp. Would a stock 240 turbo intercooler clutch hold up or is there something better?
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Old 04-04-2014, 11:27 AM   #2
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It should be fine for what you're doing now. I have a bigger turbo and am using the Sachs turbo clutch on my M47.
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Old 04-04-2014, 12:26 PM   #3
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Ok if that will hold then it works for me. No sense buying something expensive just to blow the transmission and have to replace it again.
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Old 04-04-2014, 12:37 PM   #4
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Just make sure to have the flywheel surfaced and that you break it in properly before getting too crazy. I glazed mine when it was new, I had to scuff up the pressure plate and flywheel with some wet/dry 400 sandpaper and used ATF instead of water then I scuffed the clutch disk with a d/a and some 150 grit and it hasn't slipped since; I'm boosting 13-15 psi in 4th and 5th. I'm surprised the tranny has held up so far but I've never dyno'd it or had it full of people / stuff at those boost levels.
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Old 04-04-2014, 04:28 PM   #5
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Haha alright sounds good. I honestly don't think I have much to worry about with a 13c, even if I maxed the little thing out it still probably wouldn't make more than 220 hp.
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