Lightweight flywheel group buy? CHEAP!
12-17-2003, 02:52 PM
#16
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Thread Starter
Are you going to share with the class Marc?
We are all ALWAYS open to suggestions and information that may help us in our Life Process/Hobby. If a racecar uses something that lasts multiple races, without apparent failure, then it will work on the street and DE/AX.
We are all ALWAYS open to suggestions and information that may help us in our Life Process/Hobby. If a racecar uses something that lasts multiple races, without apparent failure, then it will work on the street and DE/AX.
12-17-2003, 04:45 PM
#17
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he could tell you but then he would have to .......... Marc T has invested much of his life for the last several years getting where he is today , spent $$$$$ on product development , $$$$$ renting dyno time , literally lives in the work shop (no commute saves time and $$$ ) . What knowledge he has gained has truely been at a great personal sacrifice . How can you expect him to just give it away ? ........he considers himself a professional and we all know "pros" charge .
12-17-2003, 10:57 PM
#19
Rennlist Member
Thanks Cobey,
We simply use either a stock twin disc setup.....same as we have been selling for a very long time...or a modified setup by clutchmasters.
So again, good luck with the al flwheel
Marc
We simply use either a stock twin disc setup.....same as we have been selling for a very long time...or a modified setup by clutchmasters.
So again, good luck with the al flwheel
Marc
12-31-2003, 10:45 AM
#23
Advanced
Brendan,
I retrofitted the earlier twin disc on tomy 89 GT about 2yrs ago and offer the following thoughts:
- before you start obsessing over a flywheel that is already on the lean
side as pointed out already consider that by going to the earlier double
disk assembly you will already be removing approx. 10lbs.
- Remember the rotating mass is not just flywheel but whats attached to it;pressure plate, intermediate disk
- Reviewing my notes from the install, the balance of this rotating mass
assembly was 26lb for a total of 36lb.
- that 10lb represents 27.7% of the current assembly (10/36).
Shaving a couple more (2-3lbs) off just the flywheel is what I would definitely call steeply diminishing returns.
I am quite please with the street driveability improvement the twin disk made for my GT. Simply stated it just feels "lighter" and quicker to accelerate.
Hope this helps.............. Angel
I retrofitted the earlier twin disc on tomy 89 GT about 2yrs ago and offer the following thoughts:
- before you start obsessing over a flywheel that is already on the lean
side as pointed out already consider that by going to the earlier double
disk assembly you will already be removing approx. 10lbs.
- Remember the rotating mass is not just flywheel but whats attached to it;pressure plate, intermediate disk
- Reviewing my notes from the install, the balance of this rotating mass
assembly was 26lb for a total of 36lb.
- that 10lb represents 27.7% of the current assembly (10/36).
Shaving a couple more (2-3lbs) off just the flywheel is what I would definitely call steeply diminishing returns.
I am quite please with the street driveability improvement the twin disk made for my GT. Simply stated it just feels "lighter" and quicker to accelerate.
Hope this helps.............. Angel
01-05-2004, 08:01 AM
#25
Advanced
John,
Been a while, eh? Lots been happening. Overwhelming at times, but finally getting a chance to get more organized. Also, now moving into my own place with a proper garage/workshop so i figured it was time to start reconnecting again. Looking forward to the new year!
Been a while, eh? Lots been happening. Overwhelming at times, but finally getting a chance to get more organized. Also, now moving into my own place with a proper garage/workshop so i figured it was time to start reconnecting again. Looking forward to the new year!
01-05-2004, 02:36 PM
#26
The Fidanza wheel is very high quality. The friction material that is attached with aerospace quality stainless rivets grabs a stock friction plate MUCH better than Porsche's. Their wheels are also balanced better than Porches oem. There are absolutely zero long term track usage issues with Fidanzas in an honest 400 rwhp car.
Porsche was not building racecar 928 bottom ends for their street cars, so the ridiculously heavy 928 and 944 series cranks ensure that Motronics can more than keep up with it.
So the only real question here is whether or not it is practical to save a few pounds over an oem twin disk (probably not), not whether or not Fidanza is up to snuff.
Porsche was not building racecar 928 bottom ends for their street cars, so the ridiculously heavy 928 and 944 series cranks ensure that Motronics can more than keep up with it.
So the only real question here is whether or not it is practical to save a few pounds over an oem twin disk (probably not), not whether or not Fidanza is up to snuff.
01-05-2004, 05:47 PM
#27
Rennlist Member
actually, the dual disc set up from the S4 single disc set up, saves over 20lbs or rotating mass! 45lbs vs 25lbs. (i have a jpeg somewhere of both on the scales! (flywheel, clutch pack with discs)
all you will gain by a few lbs of a lighter flywheel, would be quick revs on the engine matching shifts. 3-5lbs will be worth almost nothing as far as hp to the wheels when you really will be testing it, and that is usually in 2nd or 3rd gear. so, unless you are hard core racing, it probably is a dimishing return of weight saving vs cost.
MK
all you will gain by a few lbs of a lighter flywheel, would be quick revs on the engine matching shifts. 3-5lbs will be worth almost nothing as far as hp to the wheels when you really will be testing it, and that is usually in 2nd or 3rd gear. so, unless you are hard core racing, it probably is a dimishing return of weight saving vs cost.
MK
Originally posted by AngelP
Brendan,
I retrofitted the earlier twin disc on tomy 89 GT about 2yrs ago and offer the following thoughts:
- before you start obsessing over a flywheel that is already on the lean
side as pointed out already consider that by going to the earlier double
disk assembly you will already be removing approx. 10lbs.
- Remember the rotating mass is not just flywheel but whats attached to it;pressure plate, intermediate disk
- Reviewing my notes from the install, the balance of this rotating mass
assembly was 26lb for a total of 36lb.
- that 10lb represents 27.7% of the current assembly (10/36).
Shaving a couple more (2-3lbs) off just the flywheel is what I would definitely call steeply diminishing returns.
I am quite please with the street driveability improvement the twin disk made for my GT. Simply stated it just feels "lighter" and quicker to accelerate.
Hope this helps.............. Angel
Brendan,
I retrofitted the earlier twin disc on tomy 89 GT about 2yrs ago and offer the following thoughts:
- before you start obsessing over a flywheel that is already on the lean
side as pointed out already consider that by going to the earlier double
disk assembly you will already be removing approx. 10lbs.
- Remember the rotating mass is not just flywheel but whats attached to it;pressure plate, intermediate disk
- Reviewing my notes from the install, the balance of this rotating mass
assembly was 26lb for a total of 36lb.
- that 10lb represents 27.7% of the current assembly (10/36).
Shaving a couple more (2-3lbs) off just the flywheel is what I would definitely call steeply diminishing returns.
I am quite please with the street driveability improvement the twin disk made for my GT. Simply stated it just feels "lighter" and quicker to accelerate.
Hope this helps.............. Angel
01-05-2004, 08:16 PM
#29
Rennlist Member
The set up is kind of special, but easy to do once you have the right parts.
It consists of a special flywheel made from old 85-86 flywheel and a timing ring gear for the S4 which then is pressed into place and spot welded.
(pressed in from 928intl and your shop can put a couple of small spot welds to make sure it never moves) (hey, good time to advance timing right???? nahhh) then, add the standard later years dual disc clutch set up and you are all set.
may want to consider an early bellhousing to get rid of the heavy starter mounting bracket on later cars. this would also mean you would need the later year clutch slave cylinder .
the only trick is a slight grinding down of the earlier bell housing right where the flywheel and timing gear ring will rub on this new flywheel combo. the grinding is mild and very obvious, and absolutely needed with the earlier bell housing.
Its been awhile, and Ive forgotten any of other details. anyone with more experience chime in here!'
MK
It consists of a special flywheel made from old 85-86 flywheel and a timing ring gear for the S4 which then is pressed into place and spot welded.
(pressed in from 928intl and your shop can put a couple of small spot welds to make sure it never moves) (hey, good time to advance timing right???? nahhh) then, add the standard later years dual disc clutch set up and you are all set.
may want to consider an early bellhousing to get rid of the heavy starter mounting bracket on later cars. this would also mean you would need the later year clutch slave cylinder .
the only trick is a slight grinding down of the earlier bell housing right where the flywheel and timing gear ring will rub on this new flywheel combo. the grinding is mild and very obvious, and absolutely needed with the earlier bell housing.
Its been awhile, and Ive forgotten any of other details. anyone with more experience chime in here!'
MK
