first350

iTrader: (24)

I had been hoping to install this myself, but work has been too busy, and AutoX has started. Here's some pics of the parts:

UR 6-Paddle Ceramic Clutch Kits - Sprung Hub (Ultra G)
-comes with everything needed for the install!


12lb Aluminum UR Flywheel:





Dyno results:

Feb 2nd @12 noon: Dyno after AAM Flash, before Flywheel/clutch install:
Pull #1: Max HP – 247.7 Max TQ: 232.2
Pull #2: Max HP – 253.0 Max TQ: 236.3
*since the first pull on the dynos are generally considered to be low, I’m only using the 2nd pull to compare.








Feb 2nd @ 5pm: Dyno after AAM Flash and UR flywheel/clutch install
Pull #1: Max HP – 257.9 Max TQ: 244.7
Pull #2: Max HP – 262.2 Max TQ: 249.6



Flywheel/Clutch Gain:
+ 9.2 HP
+ 13.3 TQ

These are very good gains IMO. The power gains are throughout the powerband, it's not just the peak HP/TQ, which means it's much more usable!


Here’s the vids from the last 2 dynos.

Dyno#1


Dyno #2



Driving home tonight, the clutch is harder to depress, but not too hard. It feels like the OEM clutch, but with 50% to 80% more force required...but similar engaging feel - so it's not abrupt. I'm glad I didn't go with a non-spring hub clutch b/c I'd probably make a fool of myself everytime I stall the car


If you want a list of my mods, check out my cardomain site, page 2.


-Peter


*I just posted a full thread in the tuning section b/c I got an AAM flash just before installing the UR flywheel/clutch...so there's more info over there on the flash.

plumpzz

iTrader: (10)

nice! After i get some springs/dampeners, I want to do this same combo. Maybe use the JWT flywheel instead of the UR one though. Big gains.

first350

iTrader: (24)

after driving on this combo over the weekend, I'm still getting use to the clutch...it chatters a bit if I try to slowly slip the clutch, but if I'm trying to take off hard, it's actually much easier to get a good launch.

I can hear the clutch/flywheel at idle when I'm n neutral and the clutch is engaged, but when I disengage the clutch, the sound goes away. Below 2K rpms, there's a bit a rattle/noise from the flywheel/clutch, but as soon as I get above 2K rpms, it goes away.

In all, I'll have to change some of my driving habits to avoid rattles/noises, but it's still very streetable. Now I'm thinking I should pick up a pair of DR's and hit the drag strip!

-Peter

Spddracer

iTrader: (6)

I wonder why your A/F was so much leaner on the "after" clutch dyno?

first350

iTrader: (24)

yeah, I noticed that too. i was thinking that the "AAM Flash, pre-clutch/flywheel" dyno was done with the car not completley warmed up...I had dropped my car off early that morning b/c I had to goto work, so I didn't get to watch that dyno run.

*from my understanding, adding a flywheel/clutch should not change A/F...

-Peter

97supratt

iTrader: (61)

Another great write-up. One thing I noticed though, upgrading a clutch/flywheel shouldn't add power. It is your air/fuel ratio that added some power.

Those are still good numbers for your mods. What's next on the agenda?

kostat26

iTrader: (41)

nice i have the same setup i like it

eltness350

iTrader: (58)

nice vid! car sounds great! nice to know that u actually do gain a bit more power gettin rid of all that rotating mass with the lightweight flywheel ...

97supratt

iTrader: (61)

Not really gain power, more like getting back power that was robbed.

Damn OEM burglars. lol

first350

iTrader: (24)

the flywheel/clutch upgrade shouldn't affect the AF ratio...I'm thinking that the AF changed a bit b/c the intial dyno (with only AAM flash) might have been done w/ the engine not completely warmed up.

next mod: DONE! There's only a few more things I could do, and still stay legal for AutoX BSP class (i.e. better diff, remove stereo, ...). I've got a few small things in the mail...JIC-Magic racing bucket seat, new set of AutoX tires...

-Peter

97supratt

iTrader: (61)

Great job on the car man, the progress is coming together.