[graunie]

Hey folks. I was thinking about ways to reduce turbo lag and was wondering what a lightweight flywheel would do? I don't know but they could already have really light flywheels on rex's. Anyway does this effect the performance?

 

[alfredob1]

Recommended Aftermarket parts??????

From what I've read/heard a lighter flywheel would improve throttle response because there would be less rotating mass. I guess it would have some effect on the turbo, but I couldn't say how much.

 

[Marine06]

Also, a better blow-off value and wastegate would significantly reduce the turbo lag.

 

[91TB78]

Also, a better blow-off value and wastegate would significantly reduce the turbo lag.

I've heard over on i-club that the stock BOV and wastegate do a great job and that unless you have HUGE amounts of power aftermarket (for the WRX) is not needed b/c the stock parts do so well.

 

[jbhebert]

The WRX already has a pretty light flywheel. The problem you get with a lighter flywheel is less torque and more driveline lash. Less torque makes the car more unhappy in stop and go traffic. Driveline lash is very common on AWD cars since they are so grippy. The lash can cause hesitation and bucking if the flywheel doesn't have enough mass to act as a damper. A different BOV or turbo controller is the way to go, although I have little problem keeping my car on boost, and it's pretty near stock.

J.B.