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Flywheels for a hipo N/A NB MX5
Posted: Thu Mar 13, 2008 11:35 am
by hamish71
Had a quick search. Nothing under flywheels, and \"fly wheel\" generated a thousand threads on bling wheels.
Am building a n/a street engine, which I expect will be close to 110rwkw. Car is a daily driver and weekend hill climber. My gearbox is good, the clutch is out of an SE and have no problems with it, so I am keeping it, but I do want to lighten the flywheel.
Things I have learnt/heard over this forum and other sources include:
1. Apparently a lot of racers just use the stock 1.6 flywheel on the 1.8 and it works really well in terms of livening the package.
2. The two piece Fidanza sets have mixed reviews, some reporting they \"come apart\".
So, if anyone has some recommendations in terms of weight, brands, and where to get them from etc, I would like to hear it.
Posted: Thu Mar 13, 2008 11:53 am
by wun911
How light are you planing to go?
Posted: Thu Mar 13, 2008 12:02 pm
by hamish71
Dont know....after recommendations for weight vs purpose of daily driver.
And then once weight is decided, pick a quality flywheel.
Posted: Thu Mar 13, 2008 12:17 pm
by CT
ACT Prolite or ACT Streetlite - there is no better available. Get them from
http://www.good-win-racing.com/
Posted: Thu Mar 13, 2008 2:34 pm
by hamish71
Thanks CT...Any opinion as to the 9 v 13 lb weights? (v 19lbs stock)
I thnk that is a 53% and 32% reduction respectively....
Posted: Thu Mar 13, 2008 2:54 pm
by green_comet
I would go the 9lb flywheel, over the 13lb. Everyone I have read about installing a heavier lightweight flywheel, have said they should have gone lighter.
Have a read up Miata.net there are heaps of threads about flywheels. Alot of the yanks think the whole streetable thing is rubbish, and that even if you go very light (5lb) it can still easily be used as a daily driver.
Im looking at going for a 8lb Fidanza in future, I have heard heaps of good things about them. I too have heard of a couple failures, but thats not going to deter me.
Posted: Thu Mar 13, 2008 3:03 pm
by wun911
Is it the ligher you get the more noizy it becomes?
Is the noize related to the material used ie are aloy flywheels more noizy than steel ones?
Has anyone saved the cash and lightend thier stock OEM flywheel??
Posted: Thu Mar 13, 2008 3:24 pm
by green_comet
Posted: Thu Mar 13, 2008 3:54 pm
by hamish71
Everytime Im about to give up on the \"big forum\" they actually contibute something useful.
Looks like light is good (9lb).
Goodwins are about $500 landed,
FMs are about $400landed,
But have found one for $375 locally.
Thanks for the help.
Posted: Thu Mar 13, 2008 3:59 pm
by wun911
Er thanks green comment...
I dont think I will lighten the OEM, I want the weight reduced where it counts. I want mine made of chrome-moly (quiet). I want one around 10 pounds.
GB?
Re:
Posted: Thu Mar 13, 2008 5:04 pm
by mr_rotary
green_comet wrote:Im looking at going for a 8lb Fidanza in future, I have heard heaps of good things about them. I too have heard of a couple failures, but thats not going to deter me.
I am also looking at the 8lb Fidanza in the very near future for my NA6
Posted: Thu Mar 13, 2008 9:33 pm
by orx626
Posted: Thu Mar 13, 2008 10:15 pm
by hamish71
Problem with the mx5plus option is, that it requires a 1600 clutch.
Posted: Thu Mar 13, 2008 11:25 pm
by zoomzoom
Any of the racing guys using a 1600 flywheel would be using a 1600 clutch too. There is from memory a 10mm difference in diameter, which means less inertia, and if you get a decent clutch you won't have a problem holding the power.
Tim
Posted: Fri Mar 14, 2008 11:39 am
by hamish71
So I have been told. Have been doing a bit of reading into it.
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