Alloy flywheel but what next

[MrE36325i 1]

After reading all the info on pros and cons on the fly wheel talking with bloke who had Escort with a light weight flywheel ,I was really looking forward and couldnt wait .

Well heres the kicker ,after the install ,so the dual mass flywheel is gone the clutch gone and in there place ,

A Aluminium Flywheel and rigid M3 clutch and the feel is the same, the motor revs the same so alittle dissapointed

I wish it did a whole lot more Does anyone know how to make the motor spool up faster? could it be restriction in the exhaust ?

your response is important to me cheers

[Phil-540i 166]

Yea, I dunno, I know 5/8ths of not much on a good day (today aint one) but it'll probably spool up a bit easier it ya whack a turbo on it I suppose...........as per your other thread might wanna fix your brakes or do a few leg exercises first......

[MrE36325i 1]

How much lighter is the new flywheel? Do others report a noticeable difference (with the same alu flywheel)?

Its less than half the weight

[Phil-540i 166]

Any motor is always restricted by fuel in, fuel out (exhaust), & reciprocating mass (you've fixed that a fair bit), & max rpms as set on ECU electronically, so yes, if exhaust is still standard, that's where I'd be spending $$ next if it were mine. Even a collapsed baffle in a muffler can strangle them lots...........I'm taking it that 'tune aspect' has already been checked as A1........??

[Ahmedsinc 414]

I went through the same debate when converting mine to manual, in the end I just couldn't justify the extra cost in going to a lighter flywheel when the car will be lucky to hit the track maybe twice in its lifetime. Only real difference I've heard about is with the lower rotational mass the revs do tend to drop a little quicker between gear changes.

Worthwhile if you're uprating to a stronger clutch but otherwise marginal IMO

Edit: Headers, de-cat and perhaps a less restrictive backbox will most likely give the best results for around the 2-ish k mark

Edited November 22, 2013 by Ahmedsinc

[Phil-540i 166]

Above ^^^ re de-cat - great point.........if its blocked it'll be fairly average too........

[MrE36325i 1]

I went through the same debate when converting mine to manual, in the end I just couldn't justify the extra cost in going to a lighter flywheel when the car will be lucky to hit the track maybe twice in its lifetime. Only real difference I've heard about is with the lower rotational mass the revs do tend to drop a little quicker between gear changes.

Worthwhile if you're uprating to a stronger clutch but otherwise marginal IMO

Edit: Headers, de-cat and perhaps a less restrictive backbox will most likely give the best results for around the 2-ish k mark

headers done ,Supersprint backbox , but the cats and pre muflers still remain

but as for the cost the dual mass flywheel had lost its spring and to replace that I got a quote $2000 nzd ,so went shopping off shore and picked up m3 clutch kit with alloy flywheel with new bolts for $800 usd and did it myself + replaced the main engine rear seal while I was in there

[MrE36325i 1]

Okay so a huge reduction.

Despite all of the earnest advice above there's no way that the existing intake/compression/exhaust on a stock 325 would be restrictive enough to annul a 50% reduction in flywheel weight. Something else is in play.

IMHO you should have a noticeable increase in throttle response unless somebody has put potatoes in your exhaust. Are you 100% sure it's been installed correctly and there's no clutch drag?

I thought there also should be an increase ,But with clutch drag thats serious and easy to pick up ,I have a very clear friction point. There is the fact that the old boys rev range needs a chip get my drift

[Ahmedsinc 414]

Oooh, now you're making me jealous!!

Now that I think about it, weren't all the pre '92 NZ new cars delivered without catalytic convertors? Something to do with the leaded petrol phaseout here? Mate of mine has a '94 540i NZ new, build sheet plus a quick look underneath confirms cat deletion & LSD from factory.

Could be worth a visit to a clutch specialist?

[MrE36325i 1]

Oooh, now you're making me jealous!!

Now that I think about it, weren't all the pre '92 NZ new cars delivered without catalytic convertors? Something to do with the leaded petrol phaseout here? Mate of mine has a '94 540i NZ new, build sheet plus a quick look underneath confirms cat deletion & LSD from factory.

Could be worth a visit to a clutch specialist?

The old boy was build up for the european market ,I assume it has cats But i cant find what a catless system looks like any ideas? as per the vin code it usually says catless

Clutches are easy and when I say easy the mechanism is simple like a kit RC , the hardest part to install is the starter motor bolts but thats another story

[thorburn 121]

Out of interest what brand of flywheel is it?

Have you removed the slave cylinder restrictor thingy majig?

When I changed to a UUC flywheel there was a noticeable difference. I also removed the restrictor at the same time. The rpms would raise and drop much faster without load(clutch in).

Before adding all the bolt on bits you might want to give the engine a check over. Compression and a leak down test should at least give you a good start.

[MrE36325i 1]

Out of interest what brand of flywheel is it?

Have you removed the slave cylinder restrictor thingy majig?

When I changed to a UUC flywheel there was a noticeable difference. I also removed the restrictor at the same time. The rpms would raise and drop much faster without load(clutch in).

Before adding all the bolt on bits you might want to give the engine a check over. Compression and a leak down test should at least give you a good start.

Fidanza 13 lbs what is the model of your E36? the beauty of bolt on bits motors are cheap

[Ahmedsinc 414]

The old boy was build up for the european market ,I assume it has cats But i cant find what a catless system looks like any ideas? as per the vin code it usually says catless

Clutches are easy and when I say easy the mechanism is simple like a kit RC , the hardest part to install is the starter motor bolts but thats another story

Fairly distinctive, the pre-cat models here just used a single chamber muffler unit

Where the later ones (like mine - '94 jap import) had these bloody horrible things messing with the flow (especially when they're 20 years old and have 180km of gunge inside)

Unless you got really lucky and had the full supersprint system fitted which IIRC came with the cats deleted. But being a '91, and if it was NZ new it probably never had them to begin with

Please correct me if I've got this all horribly wrong

Edited November 23, 2013 by Ahmedsinc

[MrE36325i 1]

this is the replacement for mine it looks to me the cats are there

mine looks identical

Edited November 23, 2013 by MrE36325i

[thorburn 121]

mine is a 328.
The valve I meant is part 21 here http://www.realoem.com/bmw/showparts.do?model=BG12&mospid=47431&btnr=21_0059&hg=21&fg=10

Which headers are you using?

I'll probably go with one of those flywheels if there is a next time

Edited November 23, 2013 by Thorburn

[MrE36325i 1]

mine is a 328.

The valve I meant is part 21 here http://www.realoem.com/bmw/showparts.do?model=BG12&mospid=47431&btnr=21_0059&hg=21&fg=10

Which headers are you using?

I'll probably go with one of those flywheels if there is a next timeP

Hi This part is not on my car as standard so not there sweet

As for the headers had them custom made ,I have got as a wall hanging, a set of second hand supersprint SS headers, I was told from the seller they would fit a right hand drive, and they would if I didnt need to steer

Edited November 24, 2013 by MrE36325i

[Jonty m50e30 0]

I will take the flywheel off your hands if you have no luck went from a dual mass to a m20 lightened fly on m50 and was an unmistakeable difference, particularly on decel, e36 now has a dual mass and rev response is very very slow in comparison, i would suggest you have some other issue.

[Ahmedsinc 414]

Hi This part is not on my car as standard so not there sweet

As for the headers had them custom made ,I have got as a wall hanging, a set of second hand supersprint SS headers, I was told from the seller they would fit a right hand drive, and they would if I didnt need to steer

Would you be looking to sell the LHD headers?

[MrE36325i 1]

Would you be looking to sell the LHD headers?

They owe me 900 but I could let them go for $500