I installed the act streetlite which is supposed to be slighlty heavier for a little more momentum for launching and straight shot applications but im not sure how much sense it makes. The guy at act explained it to me but i almost think hes full of it.

 

What setup do you have? It all depends on the setup because if you get a flywheel thats too light for your setup it wont help you

 

streetlite is 11.9 and the lighter one is 8.9 pounds...as for the real world difference, i woudln't know, i may have a bad input shaft bearing so yeah thats where my prioirities are right now.

 

im running a b16 civic si with excedy stage 2 clutch and h/i/e but i dont se how the setup matters. act made it seem it was more for application

 

my friend has a 9lb flywheel in a b13 se-r, and its too light for daily driving, takes alot more effort to get going from a stop when your in traffic and such, so your 11.9lb one should be perfect since its kinda in the middle being for racing and the street

 

i run a street light and a stage 2 on my mild build ls hatch and it works great for me

 

I have the Prolite (9lb) on my daily driver and I love it. Lighter = better. I'm not sure how ACT explained the weight difference to you, but here it is in a nutshell; Some people have it in their heads that 9lbs is too light, So ACT offers a slightly heavier version (12lbs) to make all the customers happy and boost sales.

 

call tom at camp1320.he can explain it to you best.