I would like to know you that have uprated flywheel what is your opinion about the "new performance" of the car!

Regards

 

It is not a value for money mod IMHO. Over £200 for an aftermarket plus fitting unless you are already doing the gearbox or clutch. Apart from cost, the only downside I have found is that drag starts, if you are involved in that, need higher revs and much more precision.Typical weights are down to 4.5 kg.
The O/E flywheel lightened to around 8kg may be a better option for around £100 if you are already changing the clutch. I have not found any downsides to that.
The O/E is around 12kg.

 

I have an 8Kg one, I noticed very little difference in regard to both performance and usability.

 

i got an exedy 4.5kgs flywheel ;-) engine revs far more freely and thats about it (that i have noticed) downside is its really easy to stall it at first untill you get used to it.

Have not tried launching it yet as i have a new ACT organic clutch kit bedding in

tim

 

This mod did not bring me as much pleasure as I was anticipating. Yes the throttle response is quicker and yes the engine does spool up quicker, but saying that it is harder to do fast take offs and gear changes need to be made faster, engine speed is scrubbed of a lot quicker so you need to either change gear like a mad man or change gear about 500rpm later than you normally would in order to keep up engine speed. Also I have ended up in moving my power curve about 1000rpm further up the rev range which is something I had not expected, anticipated or indeed wanted. The car is now more in line with the power delivery of an STi which for a GT driver is not what I wanted. The reason I liked my GT is because it came on boost at around 3000rpm and I could leave almost anything from a standing start, now I need to wind it up to 4000rpm to get the same result. on the upside I have a higher top end speed now but the car needs to be driven at much higher revs to perform like it did before this mod, which round town is not practical

 

This is REALLY interesting stuff .. I had been very tempted to put a lightened flywheel in my uk1998 , but it seems that for practical round town driving (and burning off chav-hatch at the lights, and safely overtaking on the ring road ..) it aint worth it.

Jus ta thought - could re-mapping help bring the boost in earlier ? or is it not relevant.

Thanks - Mark

 

Worthwhile IMO. We had this discussion some time ago and such was the difference in opinion (weighed in favour of ) that I brought a lightweight flywheel (4.5kg) only to sell it without it even making it onto the car. I then thought 'what the hell' and brought another ultralight flywheel (4.2kgs) and had it fitted to my car (along with many other bits).

The negatives that came up on the thread were:

*Makes the car idle badly
*Makes the car too hard to launch
*Doesnt make a difference to performance
*Engine braking etc etc

My experiences:

*Intially makes the car feel lighter and more free revving
*Idle - unchanged
*Performance? Not one for bhp (number) chasers, but makes a positive difference on the road.
*No problem with launching. Yes it takes more skill to stop bogging but I had no probs achieving very consistant 1.7s 60ft at the drag strip.

I will most definatley be sticking with lightweight flywheels


Bob

 

I have spoken to Bob Rawle and he said that the power curve could be brought back down again with a remap.

I am getting mine remapped by him over christmas so we will see what the car is like after that.

Steve

 

Steve: was it mapped with the flywheel?

 

Nope I have not had it mapped yet I currently only have an of the shelf tek2, Bob is going to do a complete remap at christmas.

Steve

 

I had mine mapped. I would be interested to hear the views of mappers,as to whether or not it makes a difference to the map?

Bob

 

I would agree with BOB'S comments, having had a 4kg item.

Although currently using a PAR 7.5Kg item, which i have found to be a good compromise for daily road use.

I would have thought that the only likely difference to a map, would be acceleration enrichment settings, due to the free'er revving ability of an engine with a lighter flywheel - I would of thought that this difference would be very marginal, if any at all.

I stand to be corrected by someone with greater knowledge though