I am curious about what is the different ACT street.flywheel vs the stock one.
do you guys have any ideas, i know the ACT lighter, but how the drivability for the ACT.

 

Most obvious is weight.

I find with the lighter flywheel that you need to keep revs up a bit when start and stop driving.
It's great for when you need to keep the revs up on the Hwy though,and shifting quickly as the engine maintains speed.

 

Can't speak directly on the ACT Streetlite FW which looks to be @ 12.5 lbs. But for reference, over the winter I switched to an SR Motorsports LWFW at 13.6 lbs. with counterweight. That's about a 7 lb. reduction from the stock flywheel (integrated counterweight). Upside: Car revs a bit faster. And with less inertia the rpm drops less between shifts. Still completely streetable/drivable. Downside: It also messed a little bit with my idle, as it raised it ~ 200 rpm and it loped just a little at lights this spring when it was cool. That has since disappeared. All in all, I'm happy. Not dramatic, but practically speaking it's like a small power adder and wished I'd switched years ago.

Understand I'm not suggesting you get an SR Motorsports over the ACT Streetlight. I just prefer the replaceable friction surface and this one became available to me locally with a CW, so I didn't have to mess with shipping. ACT makes decent stuff. I'm running their ACT SS clutch/PP package.

You WILL need an automatic transmission counterweight off of an FD. Be careful, there are subtle but important differences among years. If the Streetlite is 12.5 lbs. PLUS the counterweight, your affects may not be as noticeable as mine. If it's 12.5 WITH the counterweight the difference might be more so.

Stock FW w/integrated counterweight:


SRM LWFW with counterweight:

 

thanks man

 

i used to have a racing beat flywheel, it drives me crazy, too light. hah

 

Happen to re-read my own post and must have had a 'senior moment'. Wanted to correct it. Please forgive the old guy...

 

i have the street lite fly wheel but never really had a chance to try the stock one because the clutch was burning out when i bought the car.. I've had no complaints yet, no noise or nothing and seems to look like a good quality piece

 

I've got an ACT Prolite flywheel, which is even lighter than the Streetlite. So far, I've not encountered any issues with the engine dropping revs too quickly. But to put it in perspective, this is on a 20B. Pretty sure that the third rotor compensates for the lighter flywheel a bit

On a 13B, your engine will rev up faster as it takes less energy to get up to speed due to the lighter weight of the flywheel. But at the same time, it will drop revs faster too, as there is less energy stored in the flywheel. Mazdatrix goes into greater detail here: Flywheel and Clutch Explanations

As for the rear counterweight, all 89-95 ones are identical as seen here: Identifying Rear Counterweights

It can be obtained from Mazdatrix for ~$150, ACT offers them too, but the best deal will almost always be here in the classifieds.