Sr20det S14 - Lightweight flywheel, a good option?

Efini-Boy · Post by **Efini-Boy** » Tue Nov 02, 2010 9:25 am

Hi, I'm replacing my Sr20det clutch with a stage 2 clutch, while I'm at it, I can replace the flywheel with a lightweight chromolly flywheel, is this a good option? or better to keep the heavy stock?

What are the positive and negative points in doing this mod?

thekoukimonster · Post by **thekoukimonster** » Tue Nov 02, 2010 10:04 am

Im curently running a Fidanza light weight flywheel,
but in my opinion it is one big waste of money

.

They say a light weight flywheel helps with acceleration, but i cant feel the difference.

You loose a big chunk of Torq low down with the lighter weight, it becomes very tardy,lazy of the line

Next time im changing clutch etc, im putting the std flywheel back

.

any other oppinions

aep886 · Post by **aep886** » Tue Nov 02, 2010 12:09 pm

all i did was skim the flywheel... it cost R170 and it lighten by 3kg

Efini-Boy · Post by **Efini-Boy** » Tue Nov 02, 2010 1:35 pm

cool, then I'll rather stick with the standard

How did it effect you aep886?

Don't you mess up the ballance of the motor when you make the one end lighter?

thekoukimonster · Post by **thekoukimonster** » Tue Nov 02, 2010 2:36 pm

My crank with light flywheel and front pully was all balanced together, during rebuild

.

std turbo. light weight flywheel ok

if

bigger turbo for example t3/t4 and light weight flywheel a big NO NO

aep886 · Post by **aep886** » Wed Nov 03, 2010 9:25 am

Efini-Boy wrote:cool, then I'll rather stick with the standard

How did it effect you aep886?

Don't you mess up the ballance of the motor when you make the one end lighter?

i still have to dyno the car before i tell you anything ok...
coz the car is not running 100% yet

Guy · Post by **Guy** » Wed Nov 03, 2010 9:47 am

thekoukimonster wrote:

if

bigger turbo for example t3/t4 and light weight flywheel a big NO NO

Why?

thekoukimonster · Post by **thekoukimonster** » Wed Nov 03, 2010 10:47 am

The bigger turbo, takes a bit longer to spool up, so lowdown no power, because of no boost yet, and now you add a lighter flywheel, it diminishes the torq even more lowdown !!.

Currently im running a t3/t4 tubonetics ballbearing turbo, making 265rwkw at 1.2 bar boost, so it surely fly, but up to 3500rpm, the torq of a std s14 sr20det, is way supperior, im only making 203nm(at 3500rpm), a std one makes about 200nm already at 2300rpm !!.

And im not using the variable valve timing anymore, 264 degree cams.

But then again, maybe it is my compression 8.2:1