Jump to content
Winnipeg Sports Car Club
  • Announcements

    • Jim Eh.

      Annual General Meeting   10/30/2017

      The Winnipeg Sports Car Club invites you to attend the 2017 Annual General Meeting and election of Directors and Officers. 
      Thursday, November 23, 2017     Canad Inns “Boardroom”, 826 Regent Avenue @ Plessis (not the casino).   (more...)
      The Boardroom is down the hall by Tavern United (not the Annex room that is off the Aaltos restaurant). 

      6:00pm
      We have the Boardroom beginning at 6:00pm. Come and join us for dinner. Take food from the Aaltos buffet back to the Boardroom where a server will take drinks orders. The club will pay half the cost of your meal.
       
      7:00pm
      The annual general meeting will start at 7:00pm.    

      Please plan on attending to ensure we have a quorum to conduct the annual club business and elect next years executive.

      Thank you,
      WSCC Executive
Sign in to follow this  
white_cross

Light weight fly wheel worth it?

Recommended Posts

Hey guys, My 04 impreza TS wagon (non turbo) is in need of a new clutch soon. At full throttle some days it will slip from the 2-4k or 3-5k rpm range. Also on cooler mornings the car will chatter for the first 2 or so accelerations leaving my drive way and first stop sign. I also tried a while back doing a clutch dump on a gravel road and lets just say all it did was full on clutch slip.

The clutch replacement got me thinking about a light weight fly wheel. Any one have any advise on the topic of light weight fly wheels. I will probably be using my impreza for next years autocross season. I had contemplated buying a different summer car but I don't want another car and I love the wagon, kind of fun and practical at the same time. Plus I can haul parts for my restoration project in the wagon. I would love an 04 wrx wagon but my car is payed for and the WRX costs more. The car is currently in stock class right now. The car is kind of slow in the acceleration department and have read that a fly wheel would improve acceleration and corner exit.

Thanks guys 

Share this post


Link to post
Share on other sites

Year's ago I bought a basket case of a car with a lightweight flywheel. It was absolutely terrible to drive on the street, pulling away from a stop light, low RPM gear changes where a huge pain, very hard to get right consistently. I also had idle/stall issues under certain conditions where the ECU counldn't "catch" the revs when going from 4,000+ back to idle. Going back to a stock flywheel was the best modification I did on that car. I would never recommend anyone to ever consider a lighter flywheel on a car they needed for daily use. As a weekend toy car maybe, as an all out race car, absolutely. Throttle response with like night and day compared to the OEM flywheel, I can see it playing an advantage in SP or above classes where it is allowed, but not worth going from Street to SP for just a flywheel.

My OEM flywheel was 23lbs, aftermarket 9lbs. Your results may vary.

  • Like 1

Share this post


Link to post
Share on other sites

I drove a VQ35DE once with a light weight flywheel. The acceleration difference from stock was amazing. Kind of like summer vs winter tires in winter. Absolute night and day. Like @Magner though, for daily use, kind of a pain. 

Share this post


Link to post
Share on other sites

In the case of your car @Magner I wonder if that was simply because it was just way too light (guess that is obvious though) because that is about a 61% weight reduction. I know for my car they most aggressively lightened flywheel is about 38% lighter - stock 29 lbs and 18 lightened for 11 lbs savings, while others are more like 8-10 lbs lighter than stock. People talk about a little bit of chatter if trying to engage the clutch below/at about 1000 RPM but no other real complaints...I have no personal experience.

@justkickin I am curious how much lighter the flywheel was in the car you drove? I am in a similar position where the stock clutch is quite weak but the stock dual-mass flywheel doesn't do a great job of holding up to increased power when tuning the car. And no one makes an aftermarket dual-mass flywheel for the S4 (or a heavy-weight single mass flywheel).

@white_cross what are the weights like for the stock and aftermarket flywheels you are looking at?

Share this post


Link to post
Share on other sites

I've also heard if you put a street/stock disc on a lightened flywheel the engagement shouldn't be as harsh. 

Most go with a upgraded pressure plate and disc which is pointless unless upping power or if the driver is really abusive to the clutch.  

Remember Devin, non or flywheel will move you to Street prepared.  

I'd just pay the $40 and turn the oe flywheel down vs 300-350 for an aluminum one.  

Share this post


Link to post
Share on other sites

I love mine. I got mine about 10 years ago. It made my car feel a lot lighter. The 5L mustangs have a heavy clutch and was a bit of a pain driving in the city. It definitely improved the city driving. But I had also installed an aluminum driveshaft 15 years ago.

aluminum flywheel 11 lbs. vs oem 21 lbs.

Like the others have said, be careful that it's not too light and ruin the way it drives.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×