ok so i have an OS giken twin plate with the smaller assembly....for my S4 i need to know what the S4 counter weight weighs and what the S5 one physically wieghts beause there are no markings...i have 2 of those twinplates and both counter wieghts i have seem to be the same...but i need to know so i know witch one to toss into my S4.....what has happend if its the wrong one? i need to know ASAP because my mazdaspeed stuff has finallly given up on me...and i wanted to swapp everything starting tonight.....

thanks!

 

I Think It Has To Do With How Much Your Rotors Weigh. Since The S5 Rotors Are Lighter The Counterweights Should Be Lighter Than The S4. I Would Find Out How Much The Rotors Weigh And Then Go On From There.

 

Here ya go: http://mazdatrix.com/faq/Rcounterweights.htm

 

You cannot tell from weighing them.
I have a confirmed S4 and S5 rear counterweights, and they weigh within 0.02 lbs. of each other - which is the resolution of my scale.

In general, the S5 usually has a lot more "balancing holes" in it...


-Ted

 

ill be taking the car to 7500 on and off in the long run...using this counterweight what am i gunna expect to see....on my S4 with the s5 counterweight....chatter? i can deal with that...unless its harmful anyone have first hand experiance on this?

 

It'll kill the bearings.
You should feel noticable engine vibrations from 2kRPM on up.


-Ted