LT77 and SD1 Flywheel

TVRleigh · Post by **TVRleigh** » Mon Dec 10, 2007 5:20 pm

Hi can you lighten the SD1 flywheel.

Thanks
Leigh

Post by **katanaman** » Mon Dec 10, 2007 5:31 pm

Yes would I recommend it no. If a flywheel shatters it will take you feet off.

5000SE · Post by **5000SE** » Mon Dec 10, 2007 10:47 pm

While Katanaman's comment is true about possible consequences, a flywheel that has been sensibly lightened will be no weaker than the original, because the material removed will mostly not contribute to its strength, and by reducing a lot of the outer weight you can actually reduce stresses.

If you’re building a real screamer of an engine, you have to be careful and not just let any grunt with a lathe cut metal from the wheel. If you’re running less than 7000rpm, it’s highly unlikely, even if you go to town on the flywheel, that anything will go wrong.

Rick-Manta · Post by **Rick-Manta** » Tue Dec 11, 2007 1:53 pm

I'd think it'll be a near pointless expense. The difference a lighter flywheel will make to most SD1 applications will be unnoticeable, IMO this sort of work is better suited to high revving screaming engines over engines generating low-mid range torque.

Yikes! Marki's made me feel better about splashing out on a new flywheel over my current one which is full of light cracks, I was going to skim it but the friction surface is already buried far below the outer wheel!!

5000SE · Post by **5000SE** » Tue Dec 11, 2007 2:34 pm

Rick-Manta wrote:I'd think it'll be a near pointless expense. The difference a lighter flywheel will make to most SD1 applications will be unnoticeable, IMO this sort of work is better suited to high revving screaming engines over engines generating low-mid range torque.

A lighter flywheel will still make a noticeable difference to the speed the engine revs up when downshifting - and for much crisper, more purposeful 'blipping' from idle!

TVRleigh · Post by **TVRleigh** » Tue Dec 11, 2007 5:42 pm

Well its going to be semi high reving as will be used on a race car, but will be limited to max 4.0 and max 230 BHP. so will go up to 6-7k but not over.

Anyone know of any company's in the South East / Essex Area, that could do this work.

I have some other work that needs doing so hopfully somwhere that specialises on RV8's

Thanks
Leigh