Flywheels for a hipo N/A NB MX5

hamish71 · Postby **hamish71** » Thu Mar 13, 2008 11:35 am

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.

wun911 · Postby **wun911** » Thu Mar 13, 2008 11:53 am

How light are you planing to go?

hamish71 · Postby **hamish71** » Thu Mar 13, 2008 12:02 pm

Dont know....after recommendations for weight vs purpose of daily driver.
And then once weight is decided, pick a quality flywheel.

CT · Postby CT » Thu Mar 13, 2008 12:17 pm

ACT Prolite or ACT Streetlite - there is no better available. Get them from http://www.good-win-racing.com/

hamish71 · Postby **hamish71** » Thu Mar 13, 2008 2:34 pm

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....

green_comet · Postby **green_comet** » Thu Mar 13, 2008 2:54 pm

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.

wun911 · Postby **wun911** » Thu Mar 13, 2008 3:03 pm

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??

green_comet · Postby **green_comet** » Thu Mar 13, 2008 3:24 pm

The answer to all your questions and more

---->http://forum.miata.net/vb/search.php?<----

Here are a few threads I found in seconds using this amazing tool. :mrgreen:

http://forum.miata.net/vb/showthread.php?t=261887&highlight=flywheel+noise
http://forum.miata.net/vb/showthread.php?t=267576&highlight=flywheel+noise
http://forum.miata.net/vb/showthread.php?t=264040&highlight=flywheel+noise
http://forum.miata.net/vb/showthread.php?t=268063&highlight=flywheel+noise

hamish71 · Postby **hamish71** » Thu Mar 13, 2008 3:54 pm

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.

wun911 · Postby **wun911** » Thu Mar 13, 2008 3:59 pm

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?

mr_rotary · Postby **mr_rotary** » Thu Mar 13, 2008 5:04 pm

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

Postby **orx626** » Thu Mar 13, 2008 9:33 pm

Here's MX-5 Plus' option....http://www.mx5plus.com.au/part_display.php?part=59&cat=1

Cheers,
Danny

hamish71 · Postby **hamish71** » Thu Mar 13, 2008 10:15 pm

Problem with the mx5plus option is, that it requires a 1600 clutch.

zoomzoom · Postby **zoomzoom** » Thu Mar 13, 2008 11:25 pm

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