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I am presently (as always) trying to get as much performance out of my EBII '93 as possible. I have already done a number of mods but i do have a question. I remember while working on a Nissan 180 we replaced the Flywheel with a lightened one. Made a hell of a lot of difference. I am curious as to wonder if replacing my flywheel will make any significant difference (if any) to overall split times. I am assuming so but wondering if anyone has done it and their comments.
Yes, a lightwer flywheel will give you a bit more power as the engine won't have to spin as much weight. But there are several differences. Part of the purpouse of a flywheel is to keep the engine spinning smoothly (mainly at idle) as it provides some momentum and thus makes it harder to stall and more driveable. So with a lighter flywheel you will notice a rougher idle.
Unlike most mods which increase power and also increase torque to a lesser degree (depending on the type of mod) a lighter flywheel will give you more power but you will actually LOSE torque as a compromise. The motor will have less momentum and you will find that it will tend to struggle a bit more uphills and at low revs.
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I was thinking about doing the same thing to my old girl while I had it apart but instead I didn't.Falcon flywheels are probably too light.I have been told that I should put a heavier one in as it will help it get off the line alot better.The Nissan probably had a real heavy one most 4 cyl seem to to reduce vibration.
Hey Bass Crazy how are you?Are you talking about the 3speed auto? if so they have a flex plate and torque convertor but not a flywheel as such you probably already know that.The torque convertor weighs a far bit and holds about 4 litres of oil where as a flex plate weighs bugga all.I am glad I didn't lighten the flywheel because if I had did it would have made it alot weaker as it was when I tigthened the pressure plate to the flywheel the spring loaded force pulled out the threads in the flywheel so I had to get it helicoiled which should make it stronger. You see the cast iron can be very brittle and what I should have really done was pay extra for an explosion proof stainless steel item.The person who built my clutch said it was not uncommon to go through a couple of flywheels after the pressure plate has pulled the threads out even on helicoiled ones.So far its all ok and fingers crossed.
It cost me around $50 for the 6.I had 3 extra holes drilled in the pressure plate for strength and piece of mind.From EB I think onwards this was standard practise i.e the 6 holes instead of 3.
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