Suspension??/
09-20-2005, 07:17 PM
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Originally Posted by lohsk
morgan, if you are still sick you can spend money on my ride any time....
Bought myself a flywheel and clutch kit.
09-20-2005, 09:29 PM
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Originally Posted by Emperor
Be careful of flywheel upgrades. Too light and it becomes very un-drivable. The stock 8 flywheel is already 20% lighter than the 7s.
As taken from an article...
' The most notable change to the RX-8's 2-rotor Renesis 13B powerplant is a new lightweight carbon-fiber flywheel. A new exhaust and slightly refined intake system bump horsepower to about 250 bhp at 8500 rpm, but it is the new flywheel that makes the difference here.
Get on the throttle and the engine spins so quickly that you'll find yourself hitting the rev limiter in every gear. In fact, overall throttle response (both on and off throttle) is so improved that it's much simpler to find and stay in the 13B's sweet spot, which is from about 5000 rpm to its 9000-rpm redline. The Mazdaspeed's acceleration times remain relatively the same as the stock version's, the extra power balancing out the extra weight of the exterior bodywork. Zero-to-60-mph is about 6 seconds and it'll run the quarter mile in around 15.'
09-21-2005, 01:34 AM
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Originally Posted by ngkenny
yes yes...too light no good...light enough to get into the power band as quick as possible would be the most ideal case. I've seen cases where civic uses too light a flywheel that it spins too fast without catching the power band properly. Seems like a lot of 8 that changed their flywheel is leaning towards the mazdaspeed flywheel.
As taken from an article...
As taken from an article...
And so I did a lot of reading on those guys who change to ACT fly wheel and most of them love their Prolite, and those who uses Streetlite wanted to change to Prolite as well. and I did also ask the seller. www.rx7store.com and the boss told me to get the prolite. cos theres a Counterweight. so its not as bad as those other cars that just change to a lighter flywheel with out counter weights.
A light flywheel with out counter weight will hav all the problems that u guys state.
Difficult to drive during heavy traffic, unable to acheived top speed and etc.
so I just went ahead and bought the Prolite. keeping my finger cross hopefully its not as bad as what u guys said.
Last edited by morganoh; 09-21-2005 at 09:45 AM.
09-21-2005, 02:11 AM
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Originally Posted by ngkenny
yes yes...too light no good...light enough to get into the power band as quick as possible would be the most ideal case. I've seen cases where civic uses too light a flywheel that it spins too fast without catching the power band properly. Seems like a lot of 8 that changed their flywheel is leaning towards the mazdaspeed flywheel.
As taken from an article...
' The most notable change to the RX-8's 2-rotor Renesis 13B powerplant is a new lightweight carbon-fiber flywheel. A new exhaust and slightly refined intake system bump horsepower to about 250 bhp at 8500 rpm, but it is the new flywheel that makes the difference here.
Get on the throttle and the engine spins so quickly that you'll find yourself hitting the rev limiter in every gear. In fact, overall throttle response (both on and off throttle) is so improved that it's much simpler to find and stay in the 13B's sweet spot, which is from about 5000 rpm to its 9000-rpm redline. The Mazdaspeed's acceleration times remain relatively the same as the stock version's, the extra power balancing out the extra weight of the exterior bodywork. Zero-to-60-mph is about 6 seconds and it'll run the quarter mile in around 15.'
As taken from an article...
' The most notable change to the RX-8's 2-rotor Renesis 13B powerplant is a new lightweight carbon-fiber flywheel. A new exhaust and slightly refined intake system bump horsepower to about 250 bhp at 8500 rpm, but it is the new flywheel that makes the difference here.
Get on the throttle and the engine spins so quickly that you'll find yourself hitting the rev limiter in every gear. In fact, overall throttle response (both on and off throttle) is so improved that it's much simpler to find and stay in the 13B's sweet spot, which is from about 5000 rpm to its 9000-rpm redline. The Mazdaspeed's acceleration times remain relatively the same as the stock version's, the extra power balancing out the extra weight of the exterior bodywork. Zero-to-60-mph is about 6 seconds and it'll run the quarter mile in around 15.'
How can the flywheel be carbon-fibre? Its too fragile. Metals ones already have problems with high rpms.
From what i know, aluminum ones already have a maximum tolerance of 10k plus rpms. Any higher and the flywheel will fracture.
So carbon-fibre being brittle though strong may have problems with sudden acceleration/deceleration and high rpms.
Yes, i have heard of many civic owners changing to very light flywheels and they really have a serious problem with drivability. If its too light, there will not be enough inertia to properly engage gears and it will be too jerky. Moreover when its too light, the response may be too good to drive properly. The engine speed may build up too fast. Light flywheels may be great for track use but can be a pain for daily usage when you rarely exceed 3-4k rpms. Not to mention you tend to lose vehicle speed easily at expressway speeds. Consequently FC may also suffer due to jerky gear changes and lost of vehicle inertia at higher speeds.
Thus too light may not be good. Like i have said, mazda did do their homework properly. Theres are reason why the stock flywheel is only 8.4 kg and not any lighter.
09-21-2005, 02:23 AM
#31
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Like I said, flywheel and clutch will definitely affect driveability. Whether for the better or for the worse depends on how light a flywheel you get and what brand/type of clutch. A flywheel that is too light will make it harder to get moving from a standing start because it lacks the rotating mass to turn the transmission, although the throttle response will be better and make it easier to match RPMs for downshifts with heel and toe. A super single clutch has very good grip, but again makes driving at low speeds such as during parking and heavy traffic a pain. You have to rev up the engine or else the whole car will just jerk and knock, and with petrol prices at a record high, it gets painful on the wallet too. Another couple of points to note about racing clutch is the increased clutch pedal pressure because of harder clutch springs and some of them can get a bit noisy. Anyway, I read somewhere that the stock clutch (it's an Exedy) is good for up to 300HP. So again, Mazda has already given us a decent clutch as stock. Better know what you're getting into so you can make an informed decision when you're considering mods for your car.
09-21-2005, 10:09 AM
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Originally Posted by sqflyer
Like I said, flywheel and clutch will definitely affect driveability. Whether for the better or for the worse depends on how light a flywheel you get and what brand/type of clutch. A flywheel that is too light will make it harder to get moving from a standing start because it lacks the rotating mass to turn the transmission, although the throttle response will be better and make it easier to match RPMs for downshifts with heel and toe..
With this Counter Weights, the flywheel will still have a rotating mass for the inertia required by a heavy flywheel.
Originally Posted by sqflyer
A super single clutch has very good grip, but again makes driving at low speeds such as during parking and heavy traffic a pain. You have to rev up the engine or else the whole car will just jerk and knock, and with petrol prices at a record high, it gets painful on the wallet too. Another couple of points to note about racing clutch is the increased clutch pedal pressure because of harder clutch springs and some of them can get a bit noisy. Anyway, I read somewhere that the stock clutch (it's an Exedy) is good for up to 300HP. So again, Mazda has already given us a decent clutch as stock. Better know what you're getting into so you can make an informed decision when you're considering mods for your car.
The ACT clutches has 3 difference grades.
1) Heavy duty : 20-50% Clamp load increase
2) Xtreme : 50-120% clamp load increase
3) Max Xtreme: 75-150% Clamp Load increase.
The Clutch is not only for better Clamp load but a longer clutch life during hardcore driving on Tracks and even on the streets.
Clutch Life
As the ACT also harden the release bearing contact area to reduce wear. Each pressure plate is designed in the optimum working range for maximum clutch life, clamp load, and release travel.
Good info
09-21-2005, 02:07 PM
#33
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Originally Posted by morganoh
Those cases that light flywheel seriously driveability are those without any CounterWeights.
With this Counter Weights, the flywheel will still have a rotating mass for the inertia required by a heavy flywheel.
With this Counter Weights, the flywheel will still have a rotating mass for the inertia required by a heavy flywheel.
As for the clutch, it's subject to personal feel. Install it and check it out for yourself. I'm just giving a general advice to new members who may think every aftermarket mod must be better than stock. If you're experienced and know exactly what you're getting into, then just get it and enjoy it. Nothing personal.
09-21-2005, 07:38 PM
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Originally Posted by Emperor
How can the flywheel be carbon-fibre? Its too fragile. Metals ones already have problems with high rpms.
From what i know, aluminum ones already have a maximum tolerance of 10k plus rpms. Any higher and the flywheel will fracture.
So carbon-fibre being brittle though strong may have problems with sudden acceleration/deceleration and high rpms.
Yes, i have heard of many civic owners changing to very light flywheels and they really have a serious problem with drivability. If its too light, there will not be enough inertia to properly engage gears and it will be too jerky. Moreover when its too light, the response may be too good to drive properly. The engine speed may build up too fast. Light flywheels may be great for track use but can be a pain for daily usage when you rarely exceed 3-4k rpms. Not to mention you tend to lose vehicle speed easily at expressway speeds. Consequently FC may also suffer due to jerky gear changes and lost of vehicle inertia at higher speeds.
Thus too light may not be good. Like i have said, mazda did do their homework properly. Theres are reason why the stock flywheel is only 8.4 kg and not any lighter.
From what i know, aluminum ones already have a maximum tolerance of 10k plus rpms. Any higher and the flywheel will fracture.
So carbon-fibre being brittle though strong may have problems with sudden acceleration/deceleration and high rpms.
Yes, i have heard of many civic owners changing to very light flywheels and they really have a serious problem with drivability. If its too light, there will not be enough inertia to properly engage gears and it will be too jerky. Moreover when its too light, the response may be too good to drive properly. The engine speed may build up too fast. Light flywheels may be great for track use but can be a pain for daily usage when you rarely exceed 3-4k rpms. Not to mention you tend to lose vehicle speed easily at expressway speeds. Consequently FC may also suffer due to jerky gear changes and lost of vehicle inertia at higher speeds.
Thus too light may not be good. Like i have said, mazda did do their homework properly. Theres are reason why the stock flywheel is only 8.4 kg and not any lighter.
http://www.roadandtrack.com/article....rticle_id=1404
Have a read. mazdaspeed rx8 using carbon fibre f/w leh.
wah..8.4kg...considered light already(didn't know the weight actually..thanks)
09-21-2005, 07:47 PM
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Originally Posted by sqflyer
Ermm.. I've never heard of a flywheel without a counterweight. Don't think there is such a thing. Anyone pls correct me if I'm wrong. Even the stock flywheel has a counterweight built into the rim.
.
.
I did not know about it. cos I though that only our car model has it.
Learn something again
Thanks
09-21-2005, 10:05 PM
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Originally Posted by sqflyer
Ermm.. I've never heard of a flywheel without a counterweight. Don't think there is such a thing. Anyone pls correct me if I'm wrong. Even the stock flywheel has a counterweight built into the rim.
09-21-2005, 10:42 PM
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Originally Posted by ngkenny
apparently....there are carbon fibre flywheels ard...just like carbon fibre clutch. (there are also carbon kevlar clutch in the market as well..)
http://www.roadandtrack.com/article....rticle_id=1404
Have a read. mazdaspeed rx8 using carbon fibre f/w leh.
wah..8.4kg...considered light already(didn't know the weight actually..thanks)
http://www.roadandtrack.com/article....rticle_id=1404
Have a read. mazdaspeed rx8 using carbon fibre f/w leh.
wah..8.4kg...considered light already(didn't know the weight actually..thanks)
Carbon-carbon and carbon-fibre are 2 very different things. Its like charcoal and diamond. carbon-carbon is used in areas where there is need for a very high heat tolerance. Its is also used as brake rotors on certain porsche model. The rotors alone costs about USD$30k
http://en.wikipedia.org/wiki/Reinforced_carbon-carbon
As for mazdaspeeds flywheel, I doubt its carbon-fibre. Look at the picture ,I believe its aluminium. Only lighter at 6.92kg. I doubt even a 3-inch thick carbon-fibre can weigh 6 kg.
http://www.mazdaparts.com/ProductDet...000-1112606399
09-22-2005, 01:06 AM
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Originally Posted by Emperor
As for mazdaspeeds flywheel, I doubt its carbon-fibre. Look at the picture ,I believe its aluminium. Only lighter at 6.92kg. I doubt even a 3-inch thick carbon-fibre can weigh 6 kg.
http://www.mazdaparts.com/ProductDet...000-1112606399
http://www.mazdaparts.com/ProductDet...000-1112606399
09-22-2005, 02:13 AM
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Originally Posted by Emperor
Cro-moly is cheap. at least bicycles made of cro-moly is cheaper than aluminum ones. cro-moly is fairly heavy.
its also a possibility its made of cro-moly. high strength.
its also a possibility its made of cro-moly. high strength.
Really!! Goodness.... what have I been reading....
09-22-2005, 03:00 AM
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Originally Posted by Emperor
Cro-moly is cheap. at least bicycles made of cro-moly is cheaper than aluminum ones. cro-moly is fairly heavy.
its also a possibility its made of cro-moly. high strength.
its also a possibility its made of cro-moly. high strength.
bicycle enthusiast - cromoly is a mixture of aluminium and steel. Stronger than aluminium. Weight wise not much difference as well.
Price wise - Bikes made of Cromoly is definitely not cheaper than aluminium as there are different grades. Its used in many racer bikes where the frame has to be thin and the tubing hardened. sort of like forged.
09-22-2005, 03:35 AM
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wei wei wei...... SUSPENSIONS leh... how come change to flywheel and clutch..... mai ar ni kua zhang leh......
show u guys some precious pictures of the thread topic. Those who noe and have found this picture familiar, let this continue to be familiar only to u and let me direct u guys back to the correct topic, which is SUSPENSIONS.
show u guys some precious pictures of the thread topic. Those who noe and have found this picture familiar, let this continue to be familiar only to u and let me direct u guys back to the correct topic, which is SUSPENSIONS.
Last edited by coupe07; 09-22-2005 at 03:47 AM.
09-22-2005, 04:38 AM
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Hi, juz changed mine to Tein SS. Tried my frd's D2 and tink it's a tad too hard for my liking. At last it's done n over with, now @@ing on bodykits. btw, anyone knows where can I find the NRF or Mintblue bodykits? If I can help it, I'll try to have a bodykit which isn't on anyone's ride yet. At least all different mah....
09-22-2005, 10:27 AM
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Originally Posted by SingRX8
Hi, juz changed mine to Tein SS. Tried my frd's D2 and tink it's a tad too hard for my liking. At last it's done n over with, now @@ing on bodykits. btw, anyone knows where can I find the NRF or Mintblue bodykits? If I can help it, I'll try to have a bodykit which isn't on anyone's ride yet. At least all different mah....
r magic is coming up. Mintblue, might be coming along as well. Both autoexe kits will be revealed over the weekends......
u wan to be special.. how abt fujita engineering??? RE amemiya?
09-22-2005, 11:54 AM
#45
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Originally Posted by coupe07
wei wei wei...... SUSPENSIONS leh... how come change to flywheel and clutch..... mai ar ni kua zhang leh......
show u guys some precious pictures of the thread topic. Those who noe and have found this picture familiar, let this continue to be familiar only to u and let me direct u guys back to the correct topic, which is SUSPENSIONS.
show u guys some precious pictures of the thread topic. Those who noe and have found this picture familiar, let this continue to be familiar only to u and let me direct u guys back to the correct topic, which is SUSPENSIONS.
.... Aragosta.... mmmmm
09-22-2005, 01:07 PM
#46
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Originally Posted by lohsk
.... Aragosta.... mmmmm
btw, make it knight sports aragosta..... :D :D lifted up with 3 fingers.
09-22-2005, 09:51 PM
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Hey coupe07, so u'r the one with the most posion arrows. Hmmm...must see u this sunday. hahaha...
Eniwae, was actually tinking along the line of NRF. Somehow the front and rear draws me to it. But juz juz seem to find more info on it. U know? Personally prefer a kit which replaces the entire rear bumer as well, cos lower portion of my bumper cracked liao. Reversed into a high kerb w/o noticing. Sigh..
Eniwae, was actually tinking along the line of NRF. Somehow the front and rear draws me to it. But juz juz seem to find more info on it. U know? Personally prefer a kit which replaces the entire rear bumer as well, cos lower portion of my bumper cracked liao. Reversed into a high kerb w/o noticing. Sigh..
09-23-2005, 01:55 AM
#48
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Originally Posted by SingRX8
Hey coupe07, so u'r the one with the most posion arrows. Hmmm...must see u this sunday. hahaha...
Eniwae, was actually tinking along the line of NRF. Somehow the front and rear draws me to it. But juz juz seem to find more info on it. U know? Personally prefer a kit which replaces the entire rear bumer as well, cos lower portion of my bumper cracked liao. Reversed into a high kerb w/o noticing. Sigh..
Eniwae, was actually tinking along the line of NRF. Somehow the front and rear draws me to it. But juz juz seem to find more info on it. U know? Personally prefer a kit which replaces the entire rear bumer as well, cos lower portion of my bumper cracked liao. Reversed into a high kerb w/o noticing. Sigh..
me not gg to dissuade u from NRF, but there are really nicer kits around.... :D
09-23-2005, 02:20 AM
#49
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Originally Posted by coupe07
i'm not ok.... u havent seen the rest yet..... mine is very stock one....
me not gg to dissuade u from NRF, but there are really nicer kits around.... :D
me not gg to dissuade u from NRF, but there are really nicer kits around.... :D
True, nice kits everywhere.!!!!
But yrs... Best wing(this i hear say many time laio),
No.1 stone chips ,
& and a lot more coming :D :D
09-23-2005, 02:32 AM
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Originally Posted by LsBlack
True, nice kits everywhere.!!!!
But yrs... Best wing(this i hear say many time laio),
No.1 stone chips ,
& and a lot more coming :D :D
But yrs... Best wing(this i hear say many time laio),
No.1 stone chips ,
& and a lot more coming :D :D