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Old 06-04-2006, 12:52 PM
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Originally Posted by teen_living_a_dream
you don't have pettit

8.5 aluminum - $500

9.5 steel - $310

counterweight sold seperately - $80

counterweight weight is not stated

all info from pettit racing


I did have them on there at one time. but I took them off because I belive the 8.5 is the Racing beat flywheel (add 3.5 pounds for the counter weight) and the 9.5 is the ACT prolite (add 3.5 for the counterweight).

look at the pics on the page, you can see that the flywheels are the same as I said above. good catch though.
Old 06-14-2006, 01:13 AM
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hm... according to the listings... looks like the racing beat and exedy flywheel is the lightest including counter weight... but most people got the act or fidanza, can i ask why? kinda surprised me cuz i always respected racing beat's products but thought of them as "conservative" parts but seems like they have the lightest flywheel out and i can assume it's top notch quality?

looking to buy one in the near future and any advice would be great =D
Old 06-14-2006, 10:21 AM
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as stated on here before, the static weight of course is important, the spinning weight is even more inportant, but the most important is the location of the weight.

if you look at the racing beat flywheel, the weight is very even accross the flywheel. if you look at the ACT flywheel all the weight in the outer edge has been removed. (meaning most of the 13.5 pounds are in the center)

if your having trouble picturing why this would be better, think of 13.5 pound weight on the end of a 12" pole and try to swing it up.... not to bad. now take that same 13/5 pound weight and put it on a 24" pole and try to swing it.... much harder. (leverage) there for the engione does not have to work as hard if the weight is all in the center vs. out side.

the stock flywheel has most of its weight on the outside edge. if you flip the stock flywheel over and take a look at the back side you will see a very heavy ring that goes around the outside rim. take a look at this picture to see the back of my ACT and my stock https://www.rx8club.com/attachment.p...chmentid=77806

does this help?
Old 06-14-2006, 10:42 AM
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Originally Posted by speeddemon32
as stated on here before, the static weight of course is important, the spinning weight is even more inportant, but the most important is the location of the weight.

if you look at the racing beat flywheel, the weight is very even accross the flywheel. if you look at the ACT flywheel all the weight in the outer edge has been removed. (meaning most of the 13.5 pounds are in the center)

if your having trouble picturing why this would be better, think of 13.5 pound weight on the end of a 12" pole and try to swing it up.... not to bad. now take that same 13/5 pound weight and put it on a 24" pole and try to swing it.... much harder. (leverage) there for the engione does not have to work as hard if the weight is all in the center vs. out side.

the stock flywheel has most of its weight on the outside edge. if you flip the stock flywheel over and take a look at the back side you will see a very heavy ring that goes around the outside rim. take a look at this picture to see the back of my ACT and my stock https://www.rx8club.com/attachment.p...chmentid=77806

does this help?
yea that helps a lot. haha thanks a lot man. errr i just noticed there was a similar post earlier in this thread but thanks for explaining it again with a different example.
Old 06-14-2006, 11:10 AM
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Originally Posted by speeddemon32
as stated on here before, the static weight of course is important, the spinning weight is even more inportant, but the most important is the location of the weight.

if you look at the racing beat flywheel, the weight is very even accross the flywheel. if you look at the ACT flywheel all the weight in the outer edge has been removed. (meaning most of the 13.5 pounds are in the center)

if your having trouble picturing why this would be better, think of 13.5 pound weight on the end of a 12" pole and try to swing it up.... not to bad. now take that same 13/5 pound weight and put it on a 24" pole and try to swing it.... much harder. (leverage) there for the engione does not have to work as hard if the weight is all in the center vs. out side.

the stock flywheel has most of its weight on the outside edge. if you flip the stock flywheel over and take a look at the back side you will see a very heavy ring that goes around the outside rim. take a look at this picture to see the back of my ACT and my stock https://www.rx8club.com/attachment.p...chmentid=77806

does this help?
This was a great explanation for how this works. Thank you. From what I understand, the mazdaspeed flywheel is heavier than the ones stated here, but does it also have the weight removed from the outer edge?
Old 06-14-2006, 11:53 AM
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Pic of Mazdaspeed Flywheel

here's a pic to add to the first post. MS Flywheel and counter weight. This was from the Vivid Racing web site.
Attached Thumbnails Flywheel flywheels flywheels.-mazdaspeedflywheel.jpg  
Old 06-14-2006, 11:56 AM
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Found another Flywheel made by Spec

http://www.horsepowerfreaks.com/pric.../part/Aluminum

theres pics and info on the horsepowerfreaks web site.

SPEC flywheels are CNC manufactured at an unheard-of .001 tolerance, in an industry where the standard is .010.

This precision manufacturing process ensures perfect balance and a perfectly flat bedding surface for the clutch disc, both of which also contribute to the ultimate in safety for competitive environments. All SPEC flywheels carry SFI certification.

Mazda RX8 Flywheels - SPEC Aluminum has an average rating of 8.00 with 1 review.
Attached Thumbnails Flywheel flywheels flywheels.-spec-flywheel.jpg  

Last edited by kwescott; 06-14-2006 at 12:00 PM.
Old 06-14-2006, 11:57 AM
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RPS Flywheel (175.00) plus counter weight (125.00)

http://www.horsepowerfreaks.com/pric...eels/Flywheels

If it's time to rebuild that RPS Flywheel it's Ez. Ship your Flywheel to RPS. They service the flywheel, rebalance it's shipped back.

Customer pays shipping both ways.

Flywheels - RPS Flywheel Inserts has no reviews. Click review me to review this product.

Last edited by kwescott; 06-14-2006 at 12:01 PM.
Old 06-14-2006, 11:58 AM
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Unorthodox

http://www.horsepowerfreaks.com/pric...eels/Flywheels

Mazda RX8 Flywheels - Unorthodox Ultra L - Aluminum Flywheels

Unorthodox Flywheels Ultra L - Aluminum Flywheels
Photo may differ for each model
Unorthodox Ultra L - Aluminum Flywheels Flywheels - Larger Picture
Unorthodox Racing's Ultra Light aluminum flywheels have some key advantages over stock and other aftermarket units. Machining tolerances are extremely important when making a flywheel. Parallelism on Unorthodox Racing's units is kept to within .001, the most accurate in the industry. Dowel pins are hardened steel units and all hardware is grade 8 (grade 10.9 metric equivalent), the highest grade of fastener available today. Torque plates are also included in applications where required and flywheels are checked for zero-balance before shipping.

Unorthodox Racing's friction insert (heat shield) is a specially treated alloy steel with a surface that is much stronger than the stock flywheel. All inserts are CNC-machined instead of being quickly ground like most aftermarket units, and are replaceable on all the models they make if ever damaged.

All ring gears are heated before they are placed on the flywheel and then cooled to shrink them in place. In addition they are bolted to ensure the ring gear will never slip or come off the flywheel under any circumstances.

Unorthodox Racing's flywheel weights are chosen very carefully. They are the perfect balance of strength and lightweight. Because of their lightweight, energy normally used to turn the heavy stock steel flywheel is now used to turn your drive wheels! In addition, the reduced mass allows the engine to rev faster and get you into your power band more quickly. For turbo cars this is an even greater advantage, allowing the turbo to kick in faster since the engine is revving more quickly! Unorthodox Racing's flywheels are the perfect choice for street use, drag racing, autocross, and road race events. Horsepower gains for aluminum flywheels can average from 10 to 30 horsepower over stock levels at the drive wheels.

Ultra Light aluminum flywheels are available for most applications, foreign and domestic. Flywheel weights are listed in the application tables on this website. If you are looking for a specific flywheel application and it is not listed please contact us.

Mazda RX8 Flywheels - Unorthodox Ultra L - Aluminum Flywheels has an average rating of 9.18 with 11 reviews.
Attached Thumbnails Flywheel flywheels flywheels.-flywheels_ultra_l_-_aluminum_flywheels_lrg.jpg  
Old 06-14-2006, 12:24 PM
  #85  
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Originally Posted by kwescott
Found another Flywheel made by Spec

http://www.horsepowerfreaks.com/pric.../part/Aluminum

theres pics and info on the horsepowerfreaks web site.

SPEC flywheels are CNC manufactured at an unheard-of .001 tolerance, in an industry where the standard is .010.

This precision manufacturing process ensures perfect balance and a perfectly flat bedding surface for the clutch disc, both of which also contribute to the ultimate in safety for competitive environments. All SPEC flywheels carry SFI certification.

Mazda RX8 Flywheels - SPEC Aluminum has an average rating of 8.00 with 1 review.

Info has been added. did not use the genaric picture though. I would like to keep it to pictures of real product.
thanks for the find.
Old 06-14-2006, 12:25 PM
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Originally Posted by kwescott
RPS Flywheel (175.00) plus counter weight (125.00)

http://www.horsepowerfreaks.com/pric...eels/Flywheels

If it's time to rebuild that RPS Flywheel it's Ez. Ship your Flywheel to RPS. They service the flywheel, rebalance it's shipped back.

Customer pays shipping both ways.

Flywheels - RPS Flywheel Inserts has no reviews. Click review me to review this product.

RPS is not on the list for the RX-8. you are showing a link to the inserts for all of there flywheels form what I see they do not make it for our cars.
Old 06-14-2006, 12:26 PM
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Originally Posted by kwescott
Unorthodox

http://www.horsepowerfreaks.com/pric...eels/Flywheels

Mazda RX8 Flywheels - Unorthodox Ultra L - Aluminum Flywheels

Unorthodox Flywheels Ultra L - Aluminum Flywheels
Photo may differ for each model
Unorthodox Ultra L - Aluminum Flywheels Flywheels - Larger Picture
Unorthodox Racing's Ultra Light aluminum flywheels have some key advantages over stock and other aftermarket units. Machining tolerances are extremely important when making a flywheel. Parallelism on Unorthodox Racing's units is kept to within .001, the most accurate in the industry. Dowel pins are hardened steel units and all hardware is grade 8 (grade 10.9 metric equivalent), the highest grade of fastener available today. Torque plates are also included in applications where required and flywheels are checked for zero-balance before shipping.

Unorthodox Racing's friction insert (heat shield) is a specially treated alloy steel with a surface that is much stronger than the stock flywheel. All inserts are CNC-machined instead of being quickly ground like most aftermarket units, and are replaceable on all the models they make if ever damaged.

All ring gears are heated before they are placed on the flywheel and then cooled to shrink them in place. In addition they are bolted to ensure the ring gear will never slip or come off the flywheel under any circumstances.

Unorthodox Racing's flywheel weights are chosen very carefully. They are the perfect balance of strength and lightweight. Because of their lightweight, energy normally used to turn the heavy stock steel flywheel is now used to turn your drive wheels! In addition, the reduced mass allows the engine to rev faster and get you into your power band more quickly. For turbo cars this is an even greater advantage, allowing the turbo to kick in faster since the engine is revving more quickly! Unorthodox Racing's flywheels are the perfect choice for street use, drag racing, autocross, and road race events. Horsepower gains for aluminum flywheels can average from 10 to 30 horsepower over stock levels at the drive wheels.

Ultra Light aluminum flywheels are available for most applications, foreign and domestic. Flywheel weights are listed in the application tables on this website. If you are looking for a specific flywheel application and it is not listed please contact us.

Mazda RX8 Flywheels - Unorthodox Ultra L - Aluminum Flywheels has an average rating of 9.18 with 11 reviews.

thanks, but I already have UR on the front page. I woudl like to get a real picture of it though if we can. (not the genaric pic)
Old 06-14-2006, 12:27 PM
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Originally Posted by RotaryRider36
This was a great explanation for how this works. Thank you. From what I understand, the mazdaspeed flywheel is heavier than the ones stated here, but does it also have the weight removed from the outer edge?
Kwescott posted a pic, so yes the weight has been removed from the outer edge.

and no problem.
Old 06-17-2006, 02:35 AM
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Ms

I was reading through some other forums and found a nice pic of the MS flywheel...what a pretty peice. Nemesis8 has this installed.
Attached Thumbnails Flywheel flywheels flywheels.-ms_flywheel.jpg  
Old 06-17-2006, 10:35 AM
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Okie dokie,

for the last few days I have been installing my fidanza flywheel and it really was a pita.

taking everything off was no biggie, until I got to the flywheel hanging on a 18" breaker bar using all my legs and arms I could not get the thing to budge. So I ended up needing to get a impact wrench to do the job, and about 10 seconds later the nut was off. Then there was another set of problems involving broken bolts when trying to pull the flywheel.

A few findings:

stock flywheel weighs 17 lbs according to my scale.
stock clutch cover & friction disk weigh 17.5 lbs.
fidanza flywheel weighs 10.25 lbs????????????? wtf?
I didn't weight the tranny but it felt like about 130-150lbs, or it might have just been the wierd angle i was holding it at that was making it feel heavier.

no bolt weights included on any of these.

assorted pics:

fidanza flywheel



tranny dropped


clutch cover & friction disk


stock flywheel


counterweight on


impacting counterweight on w/ the new gun


impacting new flywheel on:


Overall impressions:
pulls harder in every gear, really starts to fly at 6+ in 1,2,3,4, and 5th havent driven around with in in 6th yet.

I would define my rx8 as pretty fast now

easier to drive because there isn't as much jerkiness when you don't rev match exactly.

easier to drive because when you blip the throttle to rev match revs raise faster.

it is not harder to drive at all, when I drove down the block the first time I was expecting some trouble, but as for engaugement point and feel of the clutch it actually feels more solid than stock & easier to drive.

On hills it takes a bit more gas, but its not something that I had to put conscious effort into to do, if you can drive stick you find yourself compensating appropriately just naturally.

I had no cels on first startup and while driving around the neighborhood, but on the interstate at about 7k i looked down and saw CEL flashing, but as soon as my REVs dropped to about 4 it went away.

overall, im pleased, but its a huge project to do if your DIY. And costly.

I'll post vids later.
Old 06-18-2006, 05:13 PM
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statisclag....thanks for the awsome pics. We (speeddemon32, cesaralaniz and myself) just completed our third flywheel install. We have got it down to about 90-100 minutes to remove everything, and another 120 minutes to put everything back together. It really is amazing to see the learning curve on this install. It definately is a full day install for first timers.

We did get help up significantly on the pilot bearing this time, as cesar upgraded to the ACT clutch as well. Damn Mazda and its non-standard sized pilot bearings...went down to purchase a pilot bearing removal tool, but it didn't work, so ended up sitting there, watching cesar chizel away at the existing bearing for three hours....uggghh.

****notice to those who are replacing their clutch at the same time, spend the money and buy the pilot bearing removal tool from Racing Beat.

And yes, you will need an impact.

Looking forward to the videos.
Old 06-18-2006, 05:58 PM
  #92  
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any coments on the ACT clutch / flywheel combo ? Any harder to drive than the Act Prolite/std clutch setup ?

Am wondering if I should order this clutch as I'll want to replace the clutch plate anyway when I do the Prolite install . It wont cost a whole lot more to get the ACT pressure plate + clutch plate vs a std Mazda clutch plate only . Mazda parts are very expensive here in NZ !
Old 06-18-2006, 08:47 PM
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The clutch isn't bad at all. When you firsrt put it on, its pretty stiff. But after a day or so, its just a little harder than stock.
Old 06-18-2006, 08:49 PM
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Originally Posted by Moostafa29
The clutch isn't bad at all. When you firsrt put it on, its pretty stiff. But after a day or so, its just a little harder than stock.
did you do the stage 1 or 2 ??

beers
Old 06-18-2006, 08:57 PM
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Just 1, the heavy duty model.
Old 06-19-2006, 12:41 AM
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Fixed link:

Click here to see Video

Run was made on a slight incline with a steep hill beginning at about 4th gear and up.

Check my sig or my vB garage for my mods

Last edited by staticlag; 06-19-2006 at 10:40 AM.
Old 06-19-2006, 12:47 AM
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Originally Posted by Brettus
any coments on the ACT clutch / flywheel combo ? Any harder to drive than the Act Prolite/std clutch setup ?
I found it easy to drive, but that is because I abuse/feather the clutch anyways. I'm one of those guys that leaves a great odor behind when drag racing...burning clutch. Everyone who has driven my car has asked which clutch I have, because it definately feels different from every other 8 I have driven....nope, just the stock clutch in mine. Found that it was pretty abused when I replaced my flywheel....I should have done the clutch at the same time..oh well.

As for the ACT, the clutch pedal seems to be squishy at the beginning (almost as if it wasn't working), and then as you get really close to the floor, it engages the clutch...more like an on/off switch versus stock. It definately grabs well. It was easy for me to drive from the first take off...but for the other two guys who did the install, they had quite a difficult time adjusting...they stalled several times..
Old 06-19-2006, 01:19 AM
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Originally Posted by kwescott
I found it easy to drive, but that is because I abuse/feather the clutch anyways. I'm one of those guys that leaves a great odor behind when drag racing...burning clutch. Everyone who has driven my car has asked which clutch I have, because it definately feels different from every other 8 I have driven....nope, just the stock clutch in mine. Found that it was pretty abused when I replaced my flywheel....I should have done the clutch at the same time..oh well.

As for the ACT, the clutch pedal seems to be squishy at the beginning (almost as if it wasn't working), and then as you get really close to the floor, it engages the clutch...more like an on/off switch versus stock. It definately grabs well. It was easy for me to drive from the first take off...but for the other two guys who did the install, they had quite a difficult time adjusting...they stalled several times..
http://www.finishlineperformance.com...04-06-1641.pdf

just for fun.

beers
Old 06-19-2006, 07:20 AM
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Originally Posted by staticlag
http://www.youtube.com/watch?v=E4c6yLxoZbo

Run was made on a slight incline with a steep hill beginning at about 4th gear and up.

Check my sig or my vB garage for my mods
Maybe its me, but the sound is off.
Old 06-19-2006, 11:19 PM
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from watching the video.

Well it looks like it flies between 8 and 9.5 Grand in 2nd gear.


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