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Old 02-16-2021, 06:52 PM   #1
mj4276
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Question Possible to swap a lighter B21 flywheel into a B230?

Hi all, I believe I read somewhere that early 240s had 20lb flywheels while the later cars with a B230 came with 32lb flywheels.

I know that LH2.4 requires those crank position sensor notches, but does anyone know if it's possible to swap an early 20lb flywheel into a later LH2.2 car? Seems like this would be a pretty cheap and reliable performance upgrade come clutch-change time if it's possible.
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Old 02-16-2021, 07:06 PM   #2
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Yes.
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Old 02-16-2021, 09:43 PM   #3
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https://yoshifab.com/store/235mm-clu...l-package.html
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just like here on tb?
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Old 02-17-2021, 11:05 AM   #4
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I wouldn’t be asking the question if I was ready to dish out big yoshifab bucks. A b21 flywheel could probably be had for 1/10th that price.
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Old 02-17-2021, 11:14 AM   #5
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Sts machining has some with holes for lh2.4
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Old 02-17-2021, 11:56 AM   #6
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https://www.stsmachininginc.com/coll...ck-240-740-940

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Old 02-17-2021, 01:28 PM   #7
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I wouldn’t be asking the question if I was ready to dish out big yoshifab bucks. A b21 flywheel could probably be had for 1/10th that price.
Going rate is $100 shipped or higher.

Might as well dish out the extra cash for nice good race car parts
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Crush it as is and then buy a 240 with rusted through floors and frame, rotted out cooling system, rat pee smell, bad wiring, Chrysler ignition, and 9mm rods. And then +T it.
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Old 02-17-2021, 01:37 PM   #8
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Going rate is $100 shipped or higher.

Might as well dish out the extra cash for nice good race car parts


The wife's new minivan will have to wait.
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Old 02-17-2021, 05:56 PM   #9
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A flat flywheel on an LH2.2 B230F is how the manual cars were till 87. I got the best mileage of any Volvo I've owned with that setup in the 86 244 manual car I used to own.
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Old 02-27-2021, 03:53 PM   #10
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We never had LH2.2 here. From what I can see there is no crank sensor so if that is the case then you can use the older flat flywheel.

Just bear in mind you are going down from a 228mm clutch to a 215mm clutch
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