Discussion
Is it a good idea on a C2 964,my idle is a bit lumpy as it has the hot film kit fitted but the car absolutely flies and is just such good fun to drive.Just had an LSD fitted too.
What I don’t want to do is spoil it if that makes sense, but if it’s another improvement I would go for it.
Cheers
Kevin
What I don’t want to do is spoil it if that makes sense, but if it’s another improvement I would go for it.
Cheers
Kevin
Edited by kevs 172 on Saturday 2nd June 08:14
A lwt flywheel really improves the response of the engine in the lower gears. Downside is more mechanical noise at hot idle and at lower revs when accelerating. Some people like the noise some people dont. Some cars will also suffer stalling but its very hit and miss. Cars fitted with AC seems to make the stalling issue slightly worse.
There is no reason your car should have a lumpy idle but a remap can be done that solves all the issues.
There is no reason your car should have a lumpy idle but a remap can be done that solves all the issues.
Just hold on there a minute ........
Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
Wozy68 said:
Just hold on there a minute ........
Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
Hmmmm maybe at 10k for a crank I may give it a miss!Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
I have heard before that they aren’t a good idea, something to do with harmonics?
Wozy68 said:
Just hold on there a minute ........
Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
Not sure that I would ageee with his sentiment. I’d rather have a light weight flywheel stuck on the end of a crank that had just been buzzed that a heavy one. Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
I have a single mass flywheel on my '95 993. It was installed for a previous owner about 50 000 km ago, along with a Steve Wong chip. No stalling issues, I really like it - no problems in the 20 + tkm I've had it. Responds best to double de-clutched downshifts, also when not using 2 feet across the 3 pedals - downshift to pass etc.
Cheers - David
Cheers - David
Steve Rance said:
Wozy68 said:
Just hold on there a minute ........
Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
Not sure that I would ageee with his sentiment. I’d rather have a light weight flywheel stuck on the end of a crank that had just been buzzed that a heavy one. Ive got sat in my shed a LWF and clutch, all the bolts etc etc ready to install in my 993. Its been sat there for years.
My aircooled nut of a mechanic is not too pleased to install it and pointed out that there is nothing in the engine to damp down the crank of the 993 after a LWF has been installed (I assume the 964 also) but would install it if I wished. (Im not mecanically minded but I'm pretty sure thats what he said)
So I confidantly informed him that lots and lots of 964s and 993 have had this upgrade without any issue.
So then he pointed out to me, he's heard it seems quite a few 964 cranks have been going bang and at over £10K plus VAT for a new one, do I really want to intall one and wait and see if it does or doesnt destroy my engine over the next few years.
I know lots of peoples have had no issues, but all of a sudden, I'm not soooo confident in getting mine changed.
) Personally I’m still tempted 👍
Wozy68 said:
Steve I’m just a woodworker...... mechanically I know nothing. Something about the dmf help damping the crank comes into my head (but I may well have dreamt that bit of the convo )
Personally I’m still tempted ??
The factory fitted them to the 993 and 964 RS, Mk1 996 GT3 Clubsport and 996 GT3 RS, why would they fit something in the knowledge it could cause the premature failure of a key component such as the crankshaft ? Clue, they wouldn't...) Personally I’m still tempted ??
As Steve says, better a lightweight single mass flywheel than an overweight dual mass item. If (and I stress if, 'cause I'm VERY dubious) there's been a spate of 964 cranks failing (when was this ?) I'd hazard a guess it was due to the numerous cars driven around with failing dual mass flywheels causing torsional stresses in the crankshaft, rather than the lightweight item being the issue.
The lightweight flywheel will still have the ability to damp out the resonances/harmonics, that's one of its jobs (to smooth out the firing strokes) whilst providing a mounting point for the clutch.
https://mechanics.stackexchange.com/questions/2456...
Get it fitted !!
After changing the suspension it was the second best mod I had done on my 964C2. It's astonishing how quickly the revs rise to the limit in 1st and 2nd gears compared to a DMF. Also makes heel and toe gear changes much easier and sharper. It's also worth having the RS short shift fitted to make the best use of it and fitting an RS gear lever (only about 100 mm taller than the regular lever but makes all the difference). The latter needs to be done properly as the housing for the shifter needs modifying to take the RS short shift.
Nb. As Ras says above you can get stalling with LWF on a C2 unless the ignition system is in tip top condition. Mine would stall at first but was resolved by rebuilding the distributor. After that it was perfect.
Nb. As Ras says above you can get stalling with LWF on a C2 unless the ignition system is in tip top condition. Mine would stall at first but was resolved by rebuilding the distributor. After that it was perfect.
Slippydiff said:
The factory fitted them to the 993 and 964 RS, Mk1 996 GT3 Clubsport and 996 GT3 RS, why would they fit something in the knowledge it could cause the premature failure of a key component such as the crankshaft ? Clue, they wouldn't...
As Steve says, better a lightweight single mass flywheel than an overweight dual mass item. If (and I stress if, 'cause I'm VERY dubious) there's been a spate of 964 cranks failing (when was this ?) I'd hazard a guess it was due to the numerous cars driven around with failing dual mass flywheels causing torsional stresses in the crankshaft, rather than the lightweight item being the issue.
The lightweight flywheel will still have the ability to damp out the resonances/harmonics, that's one of its jobs (to smooth out the firing strokes) whilst providing a mounting point for the clutch.
https://mechanics.stackexchange.com/questions/2456...
Get it fitted !!
Slippydiff. As my dmf thuds, I’m ordering the rest of the parts to get my lwf fitted next week. I’m off to Italy in the old girl end of July ....... You’ve talked me into it. I’ve only had the lwf on the shed shelf for the last four years. As Steve says, better a lightweight single mass flywheel than an overweight dual mass item. If (and I stress if, 'cause I'm VERY dubious) there's been a spate of 964 cranks failing (when was this ?) I'd hazard a guess it was due to the numerous cars driven around with failing dual mass flywheels causing torsional stresses in the crankshaft, rather than the lightweight item being the issue.
The lightweight flywheel will still have the ability to damp out the resonances/harmonics, that's one of its jobs (to smooth out the firing strokes) whilst providing a mounting point for the clutch.
https://mechanics.stackexchange.com/questions/2456...
Get it fitted !!
Wozy68 said:
Slippydiff. As my dmf thuds, I’m ordering the rest of the parts to get my lwf fitted next week. I’m off to Italy in the old girl end of July ....... You’ve talked me into it. I’ve only had the lwf on the shed shelf for the last four years.
Ah, I can't guarantee a NOS/matured on the shelf flywheel will be as beneficial as a factory fresh one !!! I had a factory LWT flywheel fitted to my old 993 RS, the difference was staggering.
I think there's more chance of stalling/idling issues with the 964 than with the 993, the 964 seems more prone (though maybe that's due to it's advancing years ...)
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