Hey guys has anyone ever messed sround with lightening their flywheel. This is a hi po car application with plenty of gear, 3.91's and 5 speed, so low end torque is not a concern. anyhow i always hear people talk about it. I didn't know if anyone had and Slant 6 experience with flywheel lightening. Hope this question is not too dumb Thanks for the help guys Dan Trump

Reducing any reciprocating weight will help the engine, but there are other considerations as you probably know. The 'street savvy' is, if you're going down to the local 7-11, don't do it. If you're going down the 1/4 mile strip, then (maybe) do it.

We did it when racing and even autocrossing a 4cyl Triumph Spitfire, but I wouldn't do it for a V-8 unless in a racing situation, and then I would buy something like an aluminum flywheel and not take a chance on weakening the steel one.

You know, the more power pulses per 360-degree rotation the lighter your stock flywheel is anyway, you're not having to store energy in a V-8 like you would in a 4 cyl.

I don't have any experience with lightening one on a /6. The greatest noticable benefit is usually that the engine revs a little quicker, which can of course lead to lower et's.

Dan,

I'm not sure I would lighten a stock iron Slant 'wheel and I haven't heard of anyone doing it. Some models were heavier than others (early truck units are heavy, I think). My stocker weighs 20lbs, and I plan on getting an aluminum one from Mcleod (about $300-350 and hopefully 12lbs or less) and a light diaphragm clutch plate in the next year or two.

Cheers,

Lou

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Home of Slant6-powered fun machines since 1988

How di the aluminium flywheel go?
Did you get one and if so from wmom please?

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John Daley
Nostalgia Dragster

Wilcap in California made a bunch for us a couple of years ago. They should have the patterns now.

Lou

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Home of Slant6-powered fun machines since 1988

You might be able to have the opposite side "surfaced" to bring down the thickness and weight of the ring to the crank side...there's not too much there on the car fly wheels, but the truck ones have about a 3/4-1" thick
ring on that side that adds signifigant weight to it. Next time I'm messing about I'll pull both versions out so the board members can see the 'difference'.

Just thinking,

-D.idiot

Not too often you ask a guy a question on a thread thats 7 years old and you get your answer the next day

Or just drill some holes that don't go all the way thru from the back side......

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Left is a late truck flywheel, right is a car flywheel.



From the side you can see the thickness of the "ring" compared to the non-existent one on the car flywheel



Truck wheel close up.



Car flywheel close up.

Both are for 9 1/4" and 10" Borg and Beck clutches, these are both for the 1968+ crankshaft...

Sorry I don't have a scale handy to tell you the difference in weight, when I get some spare time the info should follow.


-D.Idiot