Has anyone experimented with this?
I guess the ridge on the back of the flywheel is making it more rigid but has anyone machined it off and/or gone even further? Will it still be man enough for the pressure applied by the clutch and not warp over time with heat build up? My other concern is screwing up the idle if there's not enough mass to even it all out.
I'm building a turbo engine on a PY lump with the much used 268/268 shrick cam, and I plan to use a new, but standard, G40 clutch.
Any advice would be appreciated.
Thanks guys 8)
Ross.
i've had a few done with decent results... can supply lightened and balanced (which is key) for £69 exchange.
Hi Pete, thanks for the offer.
In honesty, I've the means to get this done, I just don't want to go too far and wanted to draw on the experience of others of how much to take off & where, if not just the obvious ridge.
Thanks again,
Ross.
as long as you dont go too near the mounting face you should be ok. they go to about 4kg
Cool cool, that's great thanks Pete! ;D
Sorry to hijack but what exactly are the benefits of a lighter fly? I've heard and considered lots of them, but petr, as a man of great experience, what are your views?
Also, can a standard 1.3 fly be machined to take a g40 clutch and be lightened at the same time? Or would you accept a 1.3 one as exchange?
all mk2/3 flywheels are the same - so yes. The only way they wont take a 200mm g40 clutch is if there is a wear ridge and the machinshop machines the face so thats not an issue.
benefits are...
easier to rev up, better engine braking.
downsides... can lose some torque going up hills etc
Better engine braking? I thought it would be reduced. Hey ho
Right, I assumed they were all the same, so thats cool. For £69, does that include delivery, and whats the lightest you can take to, and whats the lightest you'd advise to go? This would be for a 1.4 turbo if that makes a difference
£10 extra delivery... they take them to just under 4kg, which is light but safe.. the machine shop wont go lighter as it says it might compromise strength.
more engine braking as its the weight of the fly that keeps the crank turning.
Ah, I thought the resistance of the engine produced engine braking. Therefore lightening the fly would reduce the kinetic energy of fly, hence reducing inertia. I'm not sure I understand how engine braking works then
Is 4kg a good weight to have though? Would that give smooth running?
don't go too light, it will affect you top speed and over rev when pulling hard.
i think 4kg is allready a good choice, it's more than 1kg lighter!
well g-ladersiete do them at 4kg and a few others (phil j, maxcrox) etc i think have 4kg ones... so should still run fine.
Cool. thanks for that.