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Flywheel Help
Topic Started: Jul 9 2008, 09:13 AM (389 Views)
TOYOTA.MAN
Stage 3
Hi all does anyone now the weight of the standard flywheel on my 97 5speed bzg. and does anyone have a standard flywheel bolt that they dont want, so i can try and find stronger or better quailty bolt set.

Thanks for any help :)
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AceSniper
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ARP make a 4age flywheel bolt set.

weight is just under 5.9kg from memory?
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devo
Stage 6
i got a toda flywheel fitted and my standard one was over 10kg is the bzr standard flywheels lighter than the bzgs
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DreadAngel
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Han Lue
Ummm... where did you pull 10kg from?!

5.9kg is about right... If 10kg, you probably can't rev it lol...

BZ-G maybe 6.4kg or something? C56 vs C160...
Edited by DreadAngel, Jul 9 2008, 04:25 PM.
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devo
Stage 6
my apologies its 6.9kg approx thats shit when i first got my levin didnt no a great deal on them and was told the flywheel was about 10kg so dived on the toda 4.4kg one so only two kilos weight dif ah every little helps
Edited by devo, Jul 9 2008, 04:33 PM.
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kyleseo
Stage 5

Just shy of 7kg, thought so ;)
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chiksluvit
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[OO\_____/OO]
it's pretty ugly to drive with toda lightweight flywheel... awesome in winter, but...
when you come across a steep uphill (stress) while car's fully loaded with ugly fat chicks (weight) so u want to keep the tinted windows shut since its embarrassing, but have to switch on the aircon caus it's summer (heat and more stress)... oh nightmare!

btw, that was based on true story, not gonna tell u whether its mine or not (but u probably guessed it)
Edited by chiksluvit, Jul 9 2008, 05:35 PM.
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devo
Stage 6
i love it but u do hav to be a bit more tought on the accelerator takin of at lghts etc nice bite i think it gives but as u stated above :whistle: if u had certain people in the car going up a hill ur jus going to roll back down ha
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chiksluvit
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[OO\_____/OO]
dont get me wrong, i love the lightweight flywheel on track and when driving alone especially in winter

just not very pleasant under certain circumstances
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devo
Stage 6
true but im managin to cope wit it in everyday drivin some people might hate it could understand why persons preference really :D
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BZ-G
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aka Hyper Rev 4...
i've never had any issues with a lightweight flywheel, even going up hill or load... mine just bites really well, maybe because i changed the clutch disc and clutch cover too at the same time??

the only time i stall my car was when i release the clutch pedal far too quickly...
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AceSniper
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mine is just a tad over 4 and if wanted could get another 800g-1kg off it. never had issues with the flywheel. also my clutch cover is a lot lighter than stock items, have two options from a stop start.... go slower than a normal car, or go normal were it just takes off an wheel spins hehe

blacktop fly 5.9kg
silvertop 6.9kg
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chiksluvit
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[OO\_____/OO]
ya i dont have stalling problem though, i had toda flywheel/clutch combo before but i had problems with clutch release (wouldnt come out of gear), when we took it out, found one of the springs on the clutch disc had play, so i had to ditch the toda pressure plate/disc in the end and use the toda flywheel with a new exedy clutch and disc....

the new exedy clutch/disc assy i have is a lot lighter than the toda heavyduty, so thats why it makes it a even harder drive.. it doesnt stall, but under high load you'll need to hit the accelerator harder when driving around, as low rpm acceleration/ response gets sluggish..

i didnt have that problem when i had the toda clutch, though i didnt have it for long, i think the extra weight from the toda pressure plate has compensated the extra weight of the flywheel, so the weight of the overall clutch assembly didnt go down that much compared to stock flywheel with stock clutch assy...

i'd recommend getting heavy duty clutch if you're going lightweight flywheel
Edited by chiksluvit, Jul 10 2008, 04:13 AM.
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BZ-G
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aka Hyper Rev 4...
maybe the exedy clutch and disc is not balanced with the toda flywheel causing this problem since when you buy the toda clutch set they balanced them which means replacing the parts could affect it???
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chiksluvit
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[OO\_____/OO]
the toda clutch is balanced by putting weights on the pressure plate, so nothing was done to the flywheel really in terms of balancing by toda... by putting in a different pressure plate won't throw the balance off by that much. in terms of balancing, all pressure plates are balanced against itself from the factory anyway, except the toda clutch was balanced against the flywheel it came with.

if the balance of the clutch assy was really off to cause anything, it would be more apparent on high rpm than low rpm, the first thing would've been high rpm vibration and even throwing the flywheel out of gearbox...

so far i just felt that its harder to drive under load, by load i mean weight of car and things like aircon...
when i drive by my self with/without aircon, or even carrying one passenger without aircon, it's still very livable

so basically what caused it was inertia, lighter flywheel/clutch assy helps to build revs quicker, but also drops revs quicker... heavier flywheel/clutch assy doesnt rev as quick, but revs dont slow down as quick, hence easier to drive...
with aircon, it is extra load on the engine, so when you change gear, revs drop down quicker, when you go uphill, you'll need to use lower gear more frequently than with heavier clutch/flywheel assy

i've also spoken to another dc5 type r owner who has a lightweight flywheel, and its used with stock clutch, he also felt the same as well. with a heavier pressure plate (eg. toda pressure plate or high pressure exedy), there'll be a bit more intertia than lightweight fly+stock clutch assy so it'll be a bit easier to drive

so in terms of inertia affect, this is how its ranked, from the most to the least

uprated clutch+ stock flywheel> stock clutch+ stock flywheel> uprated clutch+ lightweight flywheel> stock clutch+ lightweight flywheel

since the weight is like this
uprated clutch > stock clutch
stock flywheel > light weight flywheel

btw, i've taken the toda clutch/flywheel to exedy factory in eastern creek in sydney, they've had a look at it when diagnosing my clutch problem, they also told me the reason why the toda clutch engages really hard is actually mainly from the lack of cushioning in the clutch disc, with the uprated pressure plate. stock clutch has cushioning in the clutch disc so thats why it doesnt bite as hard.
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BZ-G
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aka Hyper Rev 4...
ah... ok got it... interesting read tho...
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AceSniper
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if you plan todo "everything" it pays to get your clutch/flywheel balanced as a set. Had mine balanced to some stupidly high turbine spec (.002gram @10,000rpm kinda thing) for box of beers :D

the excedy "sports tuff" pressure plate is lighter than the standard replacement.

I use a 4puk spring center, but the puks are mounted to steel plate no marcel its quite easy to drive, installed the same kinda kit into a sr20 an I can hardly drive the thing just keep stalling it grips hard an fast (possible that this is cause they have heavier pressure plate for sr20det)
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chiksluvit
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[OO\_____/OO]
i have compared the standard exedy replacement with the toda item, the toda was a lot heavier though..
not sure about the sports tuff, however the exedy guys told me that the toda clutch is the same as one of their high pressure racing clutch in the japanese catalogue, so i assumed it's different to the sports tuff..

but i must admit, the toda clutch is a set of nice kit, if you could get the toda clutch/flywheel set it would be the most ideal

too bad the springs came loose in my clutch disc, i just assumed that it was transit damage

btw bzg and ace, did you guys have to do any clutch fork reinforcement? and did you use stock release bearing or was there some uprated ones?

when i had the problem of clutch not releasing properly, i thought that the strength of the clutch fork contributed to part of the problem, since even after i changed thit back to stock clutch, i could still feel that the clutch is disengaging a bit slow at times despite my foot is almost through the firewall... although not 100% sure on what it is, the braided clutch line fixed the problem in the end, so it could just be the line
Edited by chiksluvit, Jul 10 2008, 06:02 PM.
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devo
Stage 6
BZ-G
Jul 10 2008, 02:26 AM
i've never had any issues with a lightweight flywheel, even going up hill or load... mine just bites really well, maybe because i changed the clutch disc and clutch cover too at the same time??

the only time i stall my car was when i release the clutch pedal far too quickly...
ye i did the same when i got my flywheel in i got a new clutch at the same time of couture auto aparently its better than the standard levin one but i get a nice bite hav to say
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BZ-G
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aka Hyper Rev 4...
i just used standard release bearings and clutch fork, i didn't really thought about upgrading these as they weren't that heavy and standard stuff should cope alright....
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AceSniper
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standard on both as well,
Fork is quite strong, thickness + bent shoulders Dont think it would ever cause an issue.
Bearing is what came in the Kit... and is made by the same company that make the toyota OEM.

I don't really have issues but do notice it sometimes... I think my clutch hose does expand a bit at times, might get a line made up some time.

Exedy japan clutchs are a whole new story compared to exedy au kits(sports tuff) the only "puk" exedy japan do is a 3 finger looks the same... might be the same as the toda one and the cover is silver(same as TRD and Toda) think the japan cover could be slightly heavier.
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chiksluvit
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[OO\_____/OO]
ic.. guess i wont need to worry about the fork that much then if i do change my clutch again some time down the track
i actually didn't know that there was a sports tuff version for our cars, but it's good news that there is since they're cheaper than the jap kits...
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AceSniper
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way cheaper paid 400nzd though contacts, the cover that came with mine wasn't pink and was in a exedy japan box so im not sure what cover I have.
The one I put on a sr20 is a pink cover I stalled it about 5 times in a row...ugly
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