Aluminum Flywheel

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henry
Posts: 157
Joined: Tue Apr 07, 2009 1:06 pm
Your car is a: Pininfarina 1983

Aluminum Flywheel

Post by henry »

Does anyone have experience with this modification? Good, bad, worth it?

Thank You.

Henry.
htchevyii
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Your car is a: 1982 Spider hers 1972 Spider his
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Re: Aluminum Flywheel

Post by htchevyii »

Many have had good experiences with the lightened stockers from Millers Mule.
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1982 SPIDER 2000, 1964 CHEVYII, 1969 Chevy Nova, 2005 DODGE RAM, 1988 Jeep Comanche
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henry
Posts: 157
Joined: Tue Apr 07, 2009 1:06 pm
Your car is a: Pininfarina 1983

Re: Aluminum Flywheel

Post by henry »

Better lightened the stock one or to buy an Aluminum one?
narfire
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Your car is a: 1980 124 spider
Location: Naramata B.C.

Re: Aluminum Flywheel

Post by narfire »

I had a machinest take about 5+ pounds off my stock then had it balanced ,My cost was about $50 cdn and a 6-pack Corona.
80 FI spider
72 work in progress
2017 Golf R ( APR Stg. 1)
2018 F350 crew long box
mosu

Re: Aluminum Flywheel

Post by mosu »

How does the car feel with the lightened flywheel?

I'm doing the clutch now and the machine shop is willing to help me shed some weight if I want.
azygoustoyou

Re: Aluminum Flywheel

Post by azygoustoyou »

Would an Aluminum one be the better one? How much would the best on be? Also, can someone explain what cdn stands for and what the equivalent would be US?
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manoa matt
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Your car is a: 1978 Fiat 124 Spider 1800
Location: Honolulu, Hawaii

Re: Aluminum Flywheel

Post by manoa matt »

The clutch will feel the same. Less rotating mass to bring up to speed, so acceration is increased, however your revs may also drop quickly between gear shifts. Check out Jason Millers website at Miller's Mule. Search around the site and you will find three cad drawings for lightening the flywheel that you can give to your machine shop. The cost will vary with the amount of material to be taken off and the shop's rate. GC recommends doweling the flywheel to the crankshaft with two 10mm dowels, to reduce the stress put on the bolts when the flywheel is lightened. I think the holes are already in the crank you just need to drill them through the flywheel.
mosu

Re: Aluminum Flywheel

Post by mosu »

Matt, regarding the dowelling holes, are they the two 10 mm holes in the last technical drawing on Jason Miller's site?
narfire
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Location: Naramata B.C.

Re: Aluminum Flywheel

Post by narfire »

azygoustoyou wrote:Would an Aluminum one be the better one? How much would the best on be? Also, can someone explain what cdn stands for and what the equivalent would be US?
cdn= canadian dollar. at the moment around $1.20 cdn is $1.00 usd. so 50 bucks canadian is about 40 bucks US.(I think)

"Google" money exchange rates,they have the rates
80 FI spider
72 work in progress
2017 Golf R ( APR Stg. 1)
2018 F350 crew long box
mdrburchette
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Your car is a: 1972 Fiat 124 Sport
Location: Winston-Salem, NC

Re: Aluminum Flywheel

Post by mdrburchette »

mosu wrote:How does the car feel with the lightened flywheel?

I'm doing the clutch now and the machine shop is willing to help me shed some weight if I want.
The car will seem to accelerate more quickly and be more rev happy. The downside is while cruising, you got to keep your foot in the gas to maintain a constant speed.
1972 124 Spider (Don)
1971 124 Spider (Juan)
1986 Bertone X19 (Blue)
1978 124 Spider Lemons racer
1974 X19 SCCA racer (Paul)
2012 500 Prima Edizione #19 (Mini Rossa)
Ever changing count of parts cars....It's a disease!
mosu

Re: Aluminum Flywheel

Post by mosu »

I have to do that anyways, so no downsides that I can see with some weight savings on the flywheel :)

Thanks for the clarification!
MIGHTY 8
Posts: 307
Joined: Sat Mar 04, 2006 9:55 pm
Your car is a: 1980 Spider
Location: North Chatham NY

Re: Aluminum Flywheel

Post by MIGHTY 8 »

What seems to be the best answer to the question regarding a lightened flywheel vs. an aluminum one? I seem to recall the difference in weight (using M. Mule's website) to be quite substantial between the two. I'm pretty versed on the positives of lightening the flywheel, but is going to an all aluminum just too aggresive an approach?

Who can finally put an answer to the question??? Inquiring minds want to know!

Thank you all
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engineerted
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Your car is a: 1974 124 spider
Location: Farmington Hills, MI

Re: Aluminum Flywheel

Post by engineerted »

Henry,

I will try to add my two cents to this. first of all what are you tring to achieve? Faster acceleration or "Safer" higher engine RPM? As for the first item either solution will work lighten stock or aluminum, but if you want to spin your twin cam past 7500 aluminum or even light weigh steel is the way to go.


Ted
Ted
1978 124 Spider, Complete Restoration
1974 Fiat 124 F Production Race car
MNspiderman

Re: Aluminum Flywheel

Post by MNspiderman »

So if a fella wants race, go aluminum, every pound counts, like everyone said. your car will rev quicker because it don't have to spin that big ass weight hanging on the tail end. If you go aluminum back there, you might as well go aluminum on the front crank pulley. Why do one without the other. you would'nt run two aluminum rims in front to save weight while installing two steel rims in back to gain traction. Although it sounds like a good idea now that i said it. So when you go aluminum flywheel you also should be looking at a light weight clutch, why would you hang a heavy clutch on a lightweight flywheel you need a clutch that weighs only 5 lbs from this site here. http://www.hrpworld.com/index.cfm?tpc=T ... on=product So its like where do you stop? One part aint that great without the other part, for the most part anyway. besides the aluminum flywheel is $500 and the clutch is $800 and the front pulleys will be $400ish and so on and so on. Oh ya, don't forget the lightweight starter, thats worth like 20 lbs. So in a nut shell stick with having the factory flywheel shaved down.
So Cal Mark

Re: Aluminum Flywheel

Post by So Cal Mark »

So its like where do you stop?

Normally you stop when the money runs out :cry:

the stock starter weighs 16lbs, the lightweight unit weighs 8lbs
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