11 replies to this topic

[miniman5]

Hello, just wondering about this, the fly wheels is a big counter weight for the engine rite? well, if its lightend wont this throw alot of things out of sink?

[mattvallins]

It can make the idle a bit weird, but it lets the engine rev faster if its lightened. My mates 1700 crossflow engine will make 10 or 11 grand with one, which is just scary to think of.

[miniman5]

10 thousand RPM??? WIKED! :grin:

[mattvallins]

The sound is just wrong from the motor! He did 8.5 to 9k with a poor little 1.1 with a standard flywheel. Driving round town in his Mk2 Escort he never let the rev counter get on the top of the gauge at 7k!

[Guess-Works.com]

A lightened flywheel, will not directly increase your redline, ( rev limit ), but what it does do is decrease the mass of the revolving parts. This means that less power is used to turn the flywheel, and hence more power to drive the wheels, net result, quicker acceleration, but not faster.

Down side, the weight of the flywheel adds inertia to the engine which means it will cruises better ( and idles ), reduce that mass the idle maybe a little more uneaven, you're more likely to stall it, and when cruising your going to use more petrol as there will not be the inertia provided by the flywheel to keep the engine revolving.

Edited by GuessWorks, 13 July 2005 - 10:04 AM.

[Pooky]

Is it worth getting one?

Considering those pros and cons? :erm:

[Jammy]

Personally, if you don't mind increased MPG and a lumpy idle then I'd get one....

I don't actually know whats wrong with a lumpy idle...

[royallingham]

Light flywheel helps acceleration in the lower gears quite considerably - the difference between having passengers in the car - and an empty car ! It makes absolutely no difference to the power output or the top speed or the fuel consumption. It reduces the load on the engine bearings - all in all it's well worth having - you may need to pick the idle speed up very slightly - and have to be just a bit more careful with the clutch when starting off.

[Pooky]

My idle speeds a bit high already! (bout 1000)

May have to consider one then!

[Prawn]

ive got an ultralight billet steel flywheel fitted to my new 1380

and while ive not yet thrashed it, as its still running in, the pick up is totally unlike any other mini ive had before,

when you blip the throttle it just picks up so fast compared to the std mini flywheel, as obviously the flywheel weighs so little

compaing a std pre verto flywheel to my billet one was scary, its just SO much lighter,

dont forget to try and get a lightenet backplate too if your doing it.

i couldnt afford a billet steel backplate, but my standard one has been lightened down to 1.7kg anyway, so its not so bad....

lightened flywheels are AWESOME

i seem to remember john (guessworks) said that his billet flywheel and backplate was the best £200 he ever spent!!!!

i couldnt agree more!

[Madmax]

ive got a lightened flywheel in mine... have yet to drive the car however

[miniman5]

I don't actually know whats wrong with a lumpy idle...

me neither! it sounds awsome! i love the kind of hesitance some mini engines have like it jsut cant be botherd to run rite untill you give it some right foot!