Hello

I wanted to know if there any difference between a Mazda 323f 1.5 flywheel to a 1.8 one?

I'm trying to figure out if the 1.5 flywheel weight less than the 1.8 ?

The rezone I'm asking is because my mechanic Lost (Miss Place) my 1.5 Flywheel, and in Israel they are only 1.8L Flywheel.

We checked everything about fitting it, like size and so. its fit perfectly there is only the weight issue.

Well what do you think?

well if there is a weight-issue, you could always try peeling off some metal from the flywheel in order to make it lighter. guess an avarage bodyshop or metalworkshop could to that.

otherwise, if it fits, try it and see where it gets you?

[quote="MrKikker"][b]well if there is a weight-issue...[/b][/quote]

thats the problem we do not know if there is a weight difference.???

Lighten it anyway. You'll get a slight performance increase.

the main issue is the difference in diameter. the z5 engine uses a 190mm clutchdisk where the bp uses a 200mm disk or a 224.9mm disk for the ones with the g series gearbox.
This makes a clutchswap near impossible. on the clutchdisk the spline count must be the same to use the same gearbox, which i doubt is the same between the z5 and the 200mm clutch.
To that end you would need to replace the gearbox aswell.
In my opinion the z5 gearbox would not cope well with the 1.8 power output, especially if you want to tune your 1.8 a bit more.

A lightweigt flywheel frees up some power, it doesn't make power.
Do mind that you will lose some low end torq (2 - 5nm).

ph3n1x I think you got it all worng. I have a Z5 with a Z5 gearBox. Not a Bp ONE.

Any way We finished Yesterday feeting the New 1.8 FlyWheel, Did need a different Clutch.

Took it for a test drive:

Good things: there is feeling that the car is more powerfull on low revs. its like its "pushing" with more power.

Bad things: top end speed as become much slower, if before i could take the car to 180 KPH Now its stuck on 160 KPH.

Meh low end is what you're looking for, not sure the difference in the 1.5 and 1.8 but if I remember rightly it's not dramatic.

[quote]ph3n1x I think you got it all worng. I have a Z5 with a Z5 gearBox. Not a Bp ONE.

Any way We finished Yesterday feeting the New 1.8 FlyWheel, Did need a different Clutch.

Took it for a test drive:

Good things: there is feeling that the car is more powerfull on low revs. its like its "pushing" with more power.

Bad things: top end speed as become much slower, if before i could take the car to 180 KPH Now its stuck on 160 KPH.[/quote]

I perhaps wasn't clear enough about this, but your post proves me right.
I merely said that there was a difference in diameter in clutches and thus in flywheels.
That would result in a too small clutchdisk used on a large 1.8 flywheel (fast clutch wearing)
or a large 1.8 clutchdisk on a small 1.5 flywheel... (flywheel wearing, possibly leading to a shredded clutchdisk in the futur)

So to summarise you have use a heavier 1.8 flywheel on the z5 engine and you feel that you have more low end torq, but lack top end power.
The exact opposit of what happens if you install a lighter flywheel.
So you did get more torq for the heavier rotating mass, and because the mass is heavier than before, Your engine is having a really difficult time on spinning on high rpm usage.

your power goes down by the same percentile in weight that you ve added to the rotating mass of your engine.