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The mkiv Supra Owners Club

Light weight flywheels Q's


Neil-NA
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What is considerd a decent weight to go for with light weight flywheels? i had a search but didnt really find much.

 

I have seen various weights in both cromo and alloy but i dont want to get one that is going to be an absoloute pig to drive with. I was looking at one on the Whifbitz site that is apparently 3.9kgs (8.6lbs) but i get the feeling this might be too light.

 

Car is an NA only used on the street and pod a couple of times a year.

 

Thanks.

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There's that much inertia in the rest of the engine that unless you go for a bespoke set up with a tiny multi plate clutch and button flywheel, with associated hassle with a suitable starter and ring gear, anything commercially available should be fine. You may have to use a bit more in the way of revs, but you shouldn't see a huge difference in drivability. I'd be considering the CLUTCH as much or more than flywheel weight, many multi plate ones do not like slippage in road usage.

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sure littlenum told me his made b*gger all difference thats why i didnt buy one

 

Thats the worry with buying one, its quite a bit of cash for something that you might not even notice, saying that its more weight of the car lol.

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I am not saying reducing engine and drive train inertia isn't a GOOD or worthwhile thing, far from it, but that people should assess whether a lower inertia flywheel is suited to their usage. Rest assured, if it made bugger all difference Toyota wouldn't hang a huge chunk of expensive steel off the end of the crank, if a 1/4 of the weight of material would suffice. You may find slow speed progress in a high gear jerky, and smooth take offs require more revs and clutch slippage. I am putting an expansive button clutch on an F3 engine at the moment, I'll try and grab a photo of a really lightweight, but still steel and titanium unit.

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I am not saying reducing engine and drive train inertia isn't a GOOD or worthwhile thing, far from it, but that people should assess whether a lower inertia flywheel is suited to their usage. Rest assured, if it made bugger all difference Toyota wouldn't hang a huge chunk of expensive steel off the end of the crank, if a 1/4 of the weight of material would suffice. You may find slow speed progress in a high gear jerky, and smooth take offs require more revs and clutch slippage. I am putting an expansive button clutch on an F3 engine at the moment, I'll try and grab a photo of a really lightweight, but still steel and titanium unit.

 

That's what worries me, I have to use the car to commute but also like to drive like a tool once in a while, I'm not too botherd about going through clutches every now and then.

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