Light weight flywheel and crank pulley?

[Chewie4299]

Originally Posted by wu_dot_com

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.

In other words:

"I've got something to tell you!!!!


.....






......









......







..








......






.....




................"

Sent from my Galaxy Nexus using Tapatalk 2

[Bonburner]

It's fine chewie; pretty much said that yes I've had the setup - leme get permission to say the results.
Better than nothing - its 1 more thing to wait for lol

[wu_dot_com]

Originally Posted by Bonburner

It's fine chewie; pretty much said that yes I've had the setup - leme get permission to say the results.
Better than nothing - its 1 more thing to wait for lol

look, this is not high school, i dont need permission to say anything. however, I want to make sure the manufactures have a firsthand story so if any of us customers have questions with regards to their product, they should be able to have a well thought out answer...

[wu_dot_com]

below are my summary of the pulley installation.

immediately after i installed the pulley, i turn on the car without disconnecting the battery. the car turned on and idle at 1500 RPM steady with check engine light on; the engine was cold. i allowed the engine to sit idle for approx. 2 min, the check engine light does not clear, and the engine idle did not drop. during the 2 min, there were no obvious signs or sound of knocking or misfire.

i then proceed to disconnect the batter and allow it to sit for approx 3 min so flash memory in the ECU would clear. after the 3 min, i reconnect the battery and turn on the car. the car starts at 1500 RPM, then quickly settle at 600 rpm steady w/o check engine light. after, that, i then proceed to take the car for a test drive. during the first throttle cycle, when i let off the throttle, the engine speed drop to almost stalling rate of 500rpm then it quickly self adjust back up to 600 rpm idle speed. all subsequent throttle cycle never dip below 600 rpm. i then take the car for a test drive varying different RPM range all the way to redline. there were no obvious malfunctions.

it seems like disconnecting the batter to allow the ecu to clear should be added to the instruction. this would clear any potential modification conflict with other aftermarket parts.

Day 2,

Post 300 miles:

when the engine bay is hot, the engine idle will fluctuate immediate after throttle let off. for example, if i am driving at constant 5K RPM and let off the throttle and step on the clutch, the engine RPM will quickly drop to slightly below 600, then bounce back to 1200, then settle at 800, before reaching a steady state of 600. also. when the drive train is hot (hot day condition, long drive condition, or harsh acceleration) it seems to generate much more engine vibration at some RPM. for my setup, the heighten vibration RPM range are 600-1000 RPM in natural, 2800-3500 RPM under load. Turning on the AC also produces more vibration at all RPM range and load condition.

over all, i recommend anyone who have installed any flywheel, clutch, or pulley that is lighter than stock weight to unplug from the better so the ECU flush memory is allowed to reset.

[wu_dot_com]

Originally Posted by KronosPerformance

I mean more so the weight of the flywheel alone.

ya i had them bolted together so i can easly transport them.

but the light weight clutch also helps with faster acceleration. though not as much benifit as the flywheel. and the gain is usually minimal.

[Opposed]

So far this review of the pulley sounds very negative... Nothing was said about better throttle response, better performance in any gear ect. Just that it caused a bad idle, and more vibration. I wonder why on the other pulley thread for Perrin's there was not a single mention of anything like this?

[Hawaiian]

Originally Posted by Opposed

So far this review of the pulley sounds very negative... Nothing was said about better throttle response, better performance in any gear ect. Just that it caused a bad idle, and more vibration. I wonder why on the other pulley thread for Perrin's there was not a single mention of anything like this?

Because wu was mainly referring to the flywheel, not the pulley.

[wu_dot_com]

Originally Posted by Opposed

So far this review of the pulley sounds very negative... Nothing was said about better throttle response, better performance in any gear ect. Just that it caused a bad idle, and more vibration. I wonder why on the other pulley thread for Perrin's there was not a single mention of anything like this?

Originally Posted by Hawaiian

Because wu was mainly referring to the flywheel, not the pulley.

actually, my response was referring to both the flywheel and pulley combine.

also my review was focusing on finding faults. Since it was what OP, and other forum members wanted to know.

Meanwhile, my review on the pulley and flywheel positive effects will be subjective. Since i have no way to show the gains in a test. but i will say that my engine response is by far more desirable and superior than stock. about 1/3 of the weight was remove from the clutch assembly and the dead zone between 2500 RPM and 3500RPM was almost none detectable during harsh acceleration.

last night, i have another forum member (stock FRS owner) test drive my car to see the difference between stock and reduce weight flywheel and pulley. he was fairly impress and now may be convince that he wants to add a flywheel down the line along with his pulley mod.

over all, the gain for doing a pulley and flywheel combo is subjective. my post is aim to illustrate the trade off.

[Opposed]

That makes sense. Thanks for clarifying it for me.

[Bonburner]

Originally Posted by wu_dot_com

look, this is not high school, i dont need permission to say anything. however, I want to make sure the manufactures have a firsthand story so if any of us customers have questions with regards to their product, they should be able to have a well thought out answer...

I don't understand why you got so upset regarding my post.
maybe permission was not the best word but it was used to simply provide the fact that there was a reason to wait a bit longer to find the results from your testing.

[paulieblaze]

I did both the crank pulley and lighter wheels at the same time, and I can tell you what a difference. The car pulls hard I fully endorse the crank pulley and getting rid of the heavy ass oem wheels (20lbs) each, my motegi mr 125 17' weight 16 lbs. :happy0180:

[wu_dot_com]

Originally Posted by Bonburner

I don't understand why you got so upset regarding my post.
maybe permission was not the best word but it was used to simply provide the fact that there was a reason to wait a bit longer to find the results from your testing.

its all good mang, i thought you were like people above who just like to trash talk rather than wait for a complete answer.

what they dont realize that is their action is discouraging for the parts developing community.

[wu_dot_com]

Btw I am not noticing a gain in fuel effiency. Do far I've seen a 2 mpg improvement with the combo

[wootwoot]

Anyone else have any experience with a light weight flywheel? Updates on anyone making a light weight flywheel option?