Light weight flywheel and crank pulley? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

wootwoot · 07-31-2012, 01:38 AM

I think a few people around here are running a light weight pulley and flywheel. Can anyone chime in and tell us how it is going? Any CL's or idle problems?

wu_dot_com · 07-31-2012, 03:02 AM

Yes and no. I'll have to discuss the detail with Perrin prior to releasing the information.

wootwoot · 07-31-2012, 04:10 PM

Interesting... Anyone else?

xcelir8brz · 07-31-2012, 04:24 PM

No issues here!

JPxM0Dz · 07-31-2012, 04:33 PM

Quote:

Originally Posted by xcelir8brz

No issues here!

Your running both ?

Sent from my GT-I9300 using Tapatalk 2

KronosPerformance · 07-31-2012, 04:38 PM

Both lightweight flywheel and pulley do and affect 2 different things

As long as the diameter is the same on the pullies are the same as factory and not smaller, there are no adverse affects. Its just less rotating mass which helps your pulley system move easier.

Lightweight flywheels can however have adverse affects depending on how low in weight you go. This will affect driveability whether its how much power it takes to get moving, how quick revs drop out of your powerband in between shifting, easier to stall and things of that nature. Its one of those things that the less weight isn't always for the better.
Too light will drastically change your driving style, increased chattering and make it easier to stall.

Cliff Notes: You can run both no problem...lightweight flywheels can have more negative affects if you go too low.

Calum · 07-31-2012, 04:59 PM

Quote:

Originally Posted by wu_dot_com

Yes and no. I'll have to discuss the detail with Perrin prior to releasing the information.

Wow, that was the most useless post I've read in a while. Why don't we have an un-thanks button?

wootwoot · 07-31-2012, 06:28 PM

Quote:

Originally Posted by xcelir8brz

No issues here!

Can you tell us which flywheel and which pulley you are running?

KronosPerformance- Do you think it is just a matter of time before someone puts in the research to find the optimal weight for the FRS? It seems most fly wheels I come across are 12lbs. I wonder how that would do?

xjohnx · 07-31-2012, 06:36 PM

Quote:

Originally Posted by wu_dot_com

Yes and no. I'll have to discuss the detail with Perrin prior to releasing the information.

Pretty sure that if privacy was a concern, you've already posted too much.

wu_dot_com · 07-31-2012, 07:22 PM

Quote:

Originally Posted by xjohnx

Pretty sure that if privacy was a concern, you've already posted too much.

no privacy is not a concern, but i rather discuss my findings with both the flywheel manufacture and perrin before releasing those information prematurely.

there were some interesting findings, and i am looking to see if there were any problem with prolong usage.

plus, i just installed them last night, i think its a common courtesy to let both perrin and the flywheel manufacture know the integration results of their product first.

ill post my experience tomorrow after a 200 mile drive test.

Silverdub · 07-31-2012, 08:29 PM

so gtfo and drive!!!!!!!!!

KronosPerformance · 07-31-2012, 10:02 PM

Quote:

Originally Posted by wootwoot

Can you tell us which flywheel and which pulley you are running?

KronosPerformance- Do you think it is just a matter of time before someone puts in the research to find the optimal weight for the FRS? It seems most fly wheels I come across are 12lbs. I wonder how that would do?

Sorry for the delay. There really isn't a "optimal" weight. Its whatever the driver thinks is best for them. Some want the absolute lowest because they prefer that driving style and want the instant RPM jump in power, some just drive to the local grocery store. Some people may not care at all and can adapt to the difference. It really just depends on the driving style and what you're looking to do with your car.

Also depends on what the weight of your factory flywheel is as well. That I'm not sure off hand what the weight is on these cars.

wu_dot_com · 08-01-2012, 01:45 AM

Quote:

Originally Posted by KronosPerformance

Sorry for the delay. There really isn't a "optimal" weight. Its whatever the driver thinks is best for them. Some want the absolute lowest because they prefer that driving style and want the instant RPM jump in power, some just drive to the local grocery store. Some people may not care at all and can adapt to the difference. It really just depends on the driving style and what you're looking to do with your car.

Also depends on what the weight of your factory flywheel is as well. That I'm not sure off hand what the weight is on these cars.

Well the stock flywheel, clutch and pressure plate assembly weights about 37lbs

KronosPerformance · 08-01-2012, 07:24 AM

Quote:

Originally Posted by wu_dot_com

Well the stock flywheel, clutch and pressure plate assembly weights about 37lbs

I mean more so the weight of the flywheel alone.

07-31-2012, 01:38 AM	#1
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 461 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Light weight flywheel and crank pulley? I think a few people around here are running a light weight pulley and flywheel. Can anyone chime in and tell us how it is going? Any CL's or idle problems?

07-31-2012, 08:29 PM	#11
Silverdub Boostin' Join Date: Jun 2012 Drives: FRS-T Location: Montreal Posts: 1,042 Thanks: 337 Thanked 489 Times in 241 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	so gtfo and drive!!!!!!!!! __________________ My custom turbo build up thread!

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07-31-2012, 03:02 AM	#2
wu_dot_com Senior Member Join Date: Dec 2011 Drives: accord Location: ca Posts: 454 Thanks: 297 Thanked 178 Times in 86 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Yes and no. I'll have to discuss the detail with Perrin prior to releasing the information.

07-31-2012, 04:10 PM	#3
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 461 Times in 264 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Interesting... Anyone else?

07-31-2012, 04:24 PM	#4
xcelir8brz Senior Member Join Date: May 2012 Drives: 2013 BRZ Limited Location: Earth Posts: 1,029 Thanks: 45 Thanked 235 Times in 157 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	No issues here!

07-31-2012, 04:38 PM	#6
KronosPerformance Senior Member Join Date: May 2012 Drives: 2009 Subaru STi Location: Princeton, NJ Posts: 390 Thanks: 0 Thanked 31 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Both lightweight flywheel and pulley do and affect 2 different things As long as the diameter is the same on the pullies are the same as factory and not smaller, there are no adverse affects. Its just less rotating mass which helps your pulley system move easier. Lightweight flywheels can however have adverse affects depending on how low in weight you go. This will affect driveability whether its how much power it takes to get moving, how quick revs drop out of your powerband in between shifting, easier to stall and things of that nature. Its one of those things that the less weight isn't always for the better. Too light will drastically change your driving style, increased chattering and make it easier to stall. Cliff Notes: You can run both no problem...lightweight flywheels can have more negative affects if you go too low.

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