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83 240 Turbo Clutch?

TerkelTurbo

TerkelTurbo

New member
Joined
Oct 19, 2016
Location
Vermont
Hey TBers,

I thought this would be straight forward but sifting through old TB threads and the interweb at large, I haven't been able to come up with an answer. I'm in need of a new clutch for my '83 244 turbo. Is there a difference between the non-turbo and turbo clutches for these years? And if so, where would I find a turbo clutch?

Volvopartsstore doesn't specify a non-turbo vs turbo clutch for 83 but both IPD and FCP note their clutches are for non-turbo cars. My local volvo guru is convinced there is a difference (and I would agree with his sentiment) but after a couple weeks of going through the usual channels and then even the back channels, he hasn't been able to come up with one. A lead on a turbo clutch would be greatly appreciated. Also, its a flat plate flywheel. That I know...

Thanks!
 
Another affordable alternative is to get the heavier dog dish flywheel. You can use the one on intercooled 240 turbos or from any manual turbo 700 series car up to 89. Then you can buy the clutch kit for a 740 turbo. They are a bit cheaper. Make sure to use the throwout bearing for your throwout arm so it's best to buy the kit for an 85 740 turbo.

The benefit is the stronger clutch kit. Plus the heavier flywheel will spool the turbo a bit faster.
 
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Lankku said:
I've used Saab 900 8 valve Turbo pressure plate in several cars. It holds a lot more torque than a stock Turbo pressure plate and is a bolt-on. And not too expensive.

https://www.rockauto.com/en/moreinfo.php?pk=1382885&cc=1265509&jsn=1634&jsn=1634
Naturally the disc won't fit, throw it in to the bin and buy a stock replacement.
Click to expand...

Good to know. I've used the larger diameter Saab 9-3 2L 16v turbo pressure plate with a 9" disk (stock dog-dish disk will work) on a few different setups. The pressure plate does need to be spaced ~0.5-01mm.
Of note, this PP will only work if the locating dowel pins are exactly between the threaded mounting holes on the flywheel.

https://www.rockauto.com/en/moreinfo.php?pk=1384113&cc=1401994&jsn=869&jsn=869
 
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dl242gt said:
Another affordable alternative is to get the heavier dog dish flywheel. You can use the one on intercooled 240 turbos or from any manual turbo 700 series car up to 89. Then you can buy the clutch kit for a 740 turbo. They are a bit cheaper. Make sure to use the throwout bearing for your throwout arm so it's best to buy the kit for an 85 740 turbo.

The benefit is the stronger clutch kit. Plus the heavier flywheel will spool the turbo a bit faster.
Click to expand...
Good information, although your take on the heavier flywheel's effect on the turbo is incorrect. A heavier flywheel requires more energy to spin up, which means the turbocharger will take longer to reach its optimal boost pressure. This can result in a noticeable delay in power delivery when you accelerate.
 
Blackfin said:
Good information, although your take on the heavier flywheel's effect on the turbo is incorrect. A heavier flywheel requires more energy to spin up, which means the turbocharger will take longer to reach its optimal boost pressure. This can result in a noticeable delay in power delivery when you accelerate.
Click to expand...
Except that is not how it worked in reality in my 84 factory intercooled turbo car. My 82 turbo with an intercooler added flat flywheel car had worse turbo response than my 84. It wasn't worlds better but that added load of pushing the flywheel caused the system to make the turbo respond better. I agree it doesn't work with the logic but it was that way in this car. That was the best most responsive stock 240 turbo I've had.
 
Interesting. I guess logic isn’t always logical. I swapped out a 30lb dual mass FW IN my turbo 964 for a 7 lb aluminum one . The difference was exhilarating. Did you end up doing the dish style flywheel mod on the 82’ ?
 
The added load likely helps the t3 spool sooner, but a Mitsubishi turbo with the smaller hot side spools quicker no matter what, along with a 960, unless it's a euro 4 banger, has more torque, so a lighter flywheel just made it rev better
 
Blackfin said:
Interesting. I guess logic isn’t always logical. I swapped out a 30lb dual mass FW IN my turbo 964 for a 7 lb aluminum one . The difference was exhilarating. Did you end up doing the dish style flywheel mod on the 82’ ?
Click to expand...
No I still have the flat flywheel in that car. To improve the response in the 82 I went to a Sierra Cosworth hot side on the T3 and added a 90+ manifold. It gives me some useful boost about low to mid 2300rpms but full boost is still about 3k like before. For quick spool mitsubishi does the deal.
 
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