4.4 kilo flywheel too light for every day use?
27 October 2005, 05:15 PM
#1
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4.4 kilo flywheel too light for every day use?
im about to replace my clutch as its slipping/juddering under heavy load 4th/5th gear. ive bought a (exedy) borg and beck kit. i just wanted to ask the above. its going in a 93 import.
all opinions welcome
stew
all opinions welcome
stew
28 October 2005, 12:42 PM
#2
Its not too light unless you want to do drag starts in which case it makes getting it right a very precise skill.
You need your tick over settings up to scratch.
For the first couple of days, expect to stall a few times when setting off due to not using enough revs to counter the lack of inertia. You adjust to what is required.
Personally, I think the gains from lightened flywheels are very over rated and if the 4.4 kg item is costing a load of dosh I am sure the money could be better spent elsewhere.
I have an O/E lightened around 7 kg for sale at £120 delivered.
You need your tick over settings up to scratch.
For the first couple of days, expect to stall a few times when setting off due to not using enough revs to counter the lack of inertia. You adjust to what is required.
Personally, I think the gains from lightened flywheels are very over rated and if the 4.4 kg item is costing a load of dosh I am sure the money could be better spent elsewhere.
I have an O/E lightened around 7 kg for sale at £120 delivered.
28 October 2005, 12:50 PM
#3
I have a 4.2kg wheel and it is fine. Idle quality wasn't affected both on the original ECU and the Apexi PFC. As said, getting used to setting off takes a few days but you soon get used to it and then drag starts won't be a problem. I found the car pulled much more strongly in 1-4th gears and it seemed as if the boost came back in quicker after a gear change.
28 October 2005, 06:01 PM
#6
Most people experience very little or no difference with a lightened OE fly (7-8kgs).
I run an ultra-light fly (ACT 4.2/.4kg) on mine and find it works well. Some people may experience some problems launching well, but I cant say I've had a problem with mine and I drag mine a fair bit. Worthwhile mod imo.
Bob
I run an ultra-light fly (ACT 4.2/.4kg) on mine and find it works well. Some people may experience some problems launching well, but I cant say I've had a problem with mine and I drag mine a fair bit. Worthwhile mod imo.
Bob
28 October 2005, 07:04 PM
#7
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fair play bob. i do about 4 drag events per year (the misses runs her car too so i dont run as often as id like. still) but its mainly fast road. i just thought as my clutch is soon to be changed and it can often take out the fly when it goes i may as well uprate it.
stew
stew
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28 October 2005, 08:09 PM
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Don't forget to substantially lighten the pulley at the other end of the crank if you go that light !! You'll unbalance the dynamics if you take all the weight off one end only.
In my opinion 4.2 is too light but I suspect that l'll get shouted down - call me old fashioned but 7 ish kilos seems a good balance.
Good luck all . David , APi Engines / APi Impreza
www.apiengines.com
In my opinion 4.2 is too light but I suspect that l'll get shouted down - call me old fashioned but 7 ish kilos seems a good balance.
Good luck all . David , APi Engines / APi Impreza
www.apiengines.com
29 October 2005, 06:56 AM
#11
That is what David means. There was quite a thread about a year ago about this subject, and the general consensous was 8Kg is a good compromise.
Bob'5: You must have a special launching sense to drag on such a light wheel! You on slicks or road tyres now?
API do a clutch/wheel package iirc @ 8 KG, and I THINK this eases the need for a lightened pully . I'm sure David will correct me if I'm wrong!
Graham.
Bob'5: You must have a special launching sense to drag on such a light wheel! You on slicks or road tyres now?
API do a clutch/wheel package iirc @ 8 KG, and I THINK this eases the need for a lightened pully . I'm sure David will correct me if I'm wrong!
Graham.
29 October 2005, 11:23 AM
#13
Originally Posted by 911
That is what David means. There was quite a thread about a year ago about this subject, and the general consensous was 8Kg is a good compromise.
Bob'5: You must have a special launching sense to drag on such a light wheel! You on slicks or road tyres now?
API do a clutch/wheel package iirc @ 8 KG, and I THINK this eases the need for a lightened pully . I'm sure David will correct me if I'm wrong!
Graham.
Bob'5: You must have a special launching sense to drag on such a light wheel! You on slicks or road tyres now?
API do a clutch/wheel package iirc @ 8 KG, and I THINK this eases the need for a lightened pully . I'm sure David will correct me if I'm wrong!
Graham.
I find consistant launching no problem with the light fly
Bob
PS. Still on OE pulleys.
29 October 2005, 11:28 AM
#14
Originally Posted by axgt_bwaii
fair play bob. i do about 4 drag events per year (the misses runs her car too so i dont run as often as id like. still) but its mainly fast road. i just thought as my clutch is soon to be changed and it can often take out the fly when it goes i may as well uprate it.
stew
stew
You'll find a ultra-light fly makes a nice difference on the road too.
Bob
31 October 2005, 11:22 AM
#17
\m/ ^_^ \m/
nice to meet you yesterday Stew 
i've also got a lightened flywheel (couldn't say to what extent though) my launches were consistently interesting
i've also got a lightened flywheel (couldn't say to what extent though) my launches were consistently interesting
.
31 October 2005, 05:40 PM
#20
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lol hi.
you will have to tell me when your next running your car. it would be nice to run along someone i know didnt catch your name though?
stew
you will have to tell me when your next running your car. it would be nice to run along someone i know
didnt catch your name though? stew
31 October 2005, 09:21 PM
#21
\m/ ^_^ \m/
Originally Posted by axgt_bwaii
lol hi.
you will have to tell me when your next running your car. it would be nice to run along someone i know didnt catch your name though?
stew
you will have to tell me when your next running your car. it would be nice to run along someone i know
didnt catch your name though? stew
and it's not Bev 
that was my last one of the year i reckon so sometime next year
16 November 2005, 09:08 PM
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just to re-cap.
borg&beck clutch fitted. lightend (7kilo cheers harvey smith) flywheel fitted along with lightend crank pulley. the job took 4 hours.
clutch is very light and sharp. has lots of bite
. the car pulls a little better than before on boost.
also id like to add that its a bloody good job i bought a lightned flywheel as my old one (standard part&clutch) was cracked all over the friction area
borg&beck clutch fitted. lightend (7kilo cheers harvey smith) flywheel fitted along with lightend crank pulley. the job took 4 hours.
clutch is very light and sharp. has lots of bite
. the car pulls a little better than before on boost.also id like to add that its a bloody good job i bought a lightned flywheel as my old one (standard part&clutch) was cracked all over the friction area
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