5hane

Hello,

wondering if anyone has any experience with the turbosport.net lightweight clutch/ flywheel combinations?

The cars main purpose is to be used for track days, but i will want to drive to and from the track. As well as Nurburgring trips, they weigh 2.5 kg which is very light compared to standard.

They seem to be very good value, and whilst my engine is apart i would like to get the crank/ clutch and front pulley balanced, so seems a good time to invest!





Thanks!

Caddyshack

Every time I have asked Mark Shead about light flywheels he only ever says 2wd standard or early escos 4x4 which leads me to believe you don't need the lighter ones at all. My 2.2 stroker will run 8000rpm max I think and 630bhp, he still says the same flywheel

5hane

Fair enough! cant argue with that!

What clutch will you be using?

Caddyshack

I have the helix high clam setup from Reyland

Adam-M

I think cars with lightweight flywheels drive horrible

cossynut2

I have had no issues with my lightened flywheel/Helix 6 paddle clutch set up.
My 2wd Saff drives/accelerates nicely.
What do you mean by drives horrible?

cossie2

true...had one with twin plate clutch set up,,all the time you need to rev it up...it is good for track but if you use it daily it is not good

Adam-M

Is yours a lightweight one like on the post or a lightened standard flywheel I.e still a heavy bugger but had a kilo or two shaved off?

I think pulling away and gear changes aren’t smooth and need lots or revs and cars seem to bog down easier on launch as less inertia.

cossynut2

Mine is a Reyland one, lightened standard one. If you came for a drive in mine you would see it has no downsides.

Caddyshack

The Reyland ones are 7.7kg and 5kg, the turbosport one (pictured)is 2.3k but they do a heavier one, the standard is around 11kg to 12kg

cossie2

7.7 kg is more than good,right now i have that one,before i had 4.5 kg....bad decision..

cossynut2

I can't remember which one I got from Reyland but it certainly works well with my set-up.

Caddyshack

That's good to know, I think the key is keeping some weight on there and not going silly with it.

markk

iTrader: (2)

While the mass is important, what is more important is the location of the mass.

No one can argue with physics (though they probably will on this site).

F=ma.
If you want to accelerate the mass plays a huge part. The same goes for negative aceleration.
Why do people lighten vehicle weight again?

Caddyshack

So, based on experience what weight would you put on?

Totally on board with adding lightness (currently swapping every bolt I can for titanium)

markk

iTrader: (2)

[QUOTE=Caddyshack;6763787]So, based on experience what weight would you put on?<br /><br />Totally on board with adding lightness (currently swapping every bolt I can for titanium)[\quote]

All depends on application. For me, very little traffic work, but still behaves extremely well on the rally car at less that 3kg plus twin plate clutch. Engine acceleration counts. On a road car, pleasant manners are needed. Maximum aceleration isn't always needed. The MoI can be on the outside of the flywheel and still be lowish weight.Once at higher engine speeds the MoI becomes less important.I'd be going half way or std weight for a car I had to drive. For a car I drive because i want to then its light everytime.

turbotrev

That’s fine with a 240mm standard size clutch but with the twin plate clutches most are a smaller size hence the lighter smaller flywheel

How can lighter be worse?

Cheers Paul

Caddyshack

A car runs a flywheel for a reason and it's not just to mount a clutch on.

turbotrev

I know.

But how is lighter worse?

I had a lightweight ttv flywheel in my car and it was no worse than a standard flywheel

Plus side was it was over half the weight and will put less stress on the crank esp at high revs

Cheers Paul

Caddyshack

Yeah, I think half may be the limit before the drivability becomes a problem. I drove a mates 911 RSR with a very light flywheel and on a hill start it just wanted to stall or fry the clutch....I think that is the problem with going too light. I suspect anything under 5kg might become a pain in traffic

markk

iTrader: (2)

My triple plate with a 2.5kg was no bother. But, i knew how to drive it.
My mum would struggle though. Change it for a heavy flywheel and my mum could drive it.
Thats the difference.

Caddyshack

That probably sums it up.

There is a nice satisfaction from rev matching, sustained changes, a double de clutch and smooth driving but to the average muggle it would be a pain if you HAD to drive that way although if you can it is enjoyable even on an everyday car.

Mark Shead

The flywheel stores the energy through its weight a YB is hopeless with a light weight flywheel unless it is on very short gearing which lowers 1sth gear so you can pull away

Mark

turbotrev

But in reality does the driveability matter that much?
Especially with paddle clutches anyway, they all pull away horrible.

And also for most people these ain’t daily drivers, these cars cover a few thousand miles tops and are normally tuned up hence needing race style clutches... reliability over driveability??

Cheers Paul

turbotrev

I never noticed any difference when changing to a lightweight wheel though?

And why would twin/triple plate clutches come with such lightweight flywheels?

Cheers Paul

Caddyshack

When I drive a car for fun it has to be nice to drive.

As you say they pull away horrible, maybe that's the flywheel weight being the problem?

I don't think your flywheel is as light Trev, as said half standard is probably the limit but I suspect 2-3kg might ruin a road car.

I have a paddle on normal flywheel and that is like a standard car to drive, I just try not to slip it as I think that is not good for them.

Mark Shead

It was not light then lol.

Mark

turbotrev

I meant as in every paddle clutch, they all judder when you pull away and are moving slow in traffic.
Mine was no worse after fitting a really light flywheel.
But we all need this race clutches fitting due to the rise in hp.
It’s nver gonna drive like a nice normal road car.

My old ttv flywheel was 4.6kgs and felt the same as a standard flywheel.

You can’t compare a race paddle clutch to a normal organic road car clutch, of course they are gonna be different when pulling away in first gear.

Cheers Paul

turbotrev

It was Mark, 4.6 kilos, More than half a standard flywheel weigh.
That’s gotta be kinder to the crank and better for pick up being less rotation mass?

I can’t see a downside from my own experience using one for two years

Cheers Paul

markk

iTrader: (2)

makes no difference to the crank. Its a balanced mass.

turbotrev

But a lot less of a rotational mass being my point.

Like for one of the reasons people run alloy cam pulleys

Cheers Paul

markk

iTrader: (2)

lol, alloy cam pulleys, yes people really run them to reduce inertia. Bit of bling maybe, very little other reasons.

Mass only affects the rate of aceleration whether that be positive or negative. If it was out of balance it would affect the crank.

turbotrev

But a light flywheel would reduce inertia also so that can only be a good thing??

Cheers Paul

Adam-M

There no doubt that there’s a performance gain I.e revs faster, totally beleive they can make it easier to bog down ( Subaru’s have flywheels like brake discs and are worst car to launch)

My civic type r has a factory fitted lightweight flywheel and pulling and away and gear changes are a pain to get right and smooth.

If it was a track car then wouldn’t bother me

turbospud1

it certainly makes it rev faster,drives just like markk describes
got that setup,ap 7 1/4 twin plate paddle clutch

cossynut2

I am fitting a concentric hydraulic clutch conversion on my 2wd Saff which has a lightened flywheel and a Helix 6 paddle clutch. Supposed to make quite a difference to the feel of the clutch.

Caddyshack

I have a helix 6 with Reyland high clamp, it is a bit heavier than my 1.9gti but not bad for a 500lbft capable system, I had the centre push then swapped to side push.

turbotrev

Because I’m upping the engine power more this year I too will be going twin plate with a light flywheel and centre push hyd clutch setup.
Don’t think I’ll risk the turbosport one though, I’ll prob go ap

Cheers Paul