SPEC clutches and flywheels for 2012-2014 Sonic 1.4L ready to go!
- Thread starter MPFab
- Start date
Scot
Athletic Supporter
It'll be a month or so before I install it. The Michigan weather needs to be more cooperative so I can:
1. Clean out my frickin garage;
2. Ride my motorcycle everyday
3. Spend about a week with the Sonic apart; plan on F&R sway bars, LSD, porting, injectors, WRAF tricks to get the signal into the ECU (as a 2nd O2, not mimicking the front switching sensor), blah blah blah
Of course, this needs to come after I finish my master bath tear out / remodel.
And I'm looking forward to seeing what my durability will be like based on your prior experiences. :sadbanana: or :banana:, we'll see.
$ub$onic
The Sticker Guy
^^ Less than three hours in the driveway.
I still don't know how you did that. It took me 3 on a lift
Thundermedic
New member
How about a long term review of the Spec clutch?
I've had the Stg2 w/ lightweight steel flywheel in the car for around 33,000 miles now, and it's been flawless. Most of that has been with a much larger turbo making much more power than the stock turbo could ever dream of. I've had over 300whp for the last 7mos, and the clutch is handling the power without a single hiccup.
nickalltogether
New member
Out of curiosity, how much lighter is the billet steel flywheel than stock? And how much worse is chatter and gear rattle without the dual mass?
"SPEC has also developed two light weight flywheel options for the 2012-2015 Sonic as well. There is a steel unit that weighs 16lbs (9lbs reduction in rotational mass), and an aluminum unit that comes in at 10lbs (15lbs reduction in rotational mass). Both units have been tested in our Sonic and drive exceptionally well, however both units produce a certain amount of gear rattle from the transmission when idling in neutral with the clutch out. This is a result of eliminating the dual mass flywheel which is designed to dampen transmission gear rattle. It does this at the expense of performance and serviceability."
Neither are really audible until the a/c kicks with clutch out. When that occurs you may experience people looking at your car like something just broke. More so with the aluminum one. Lol!
MythicMayhem
New member
How would you rate the offerings from Spec vs the offerings from Clutch Masters? I'm really on the fence as to which brand I want to purchase, I've heard a lot of good and bad points for both brands, however there aren't many comparison reviews for the Sonic specifically. My concern is that I'll spend money on the Spec kit, and I'll be replacing it in a short amount of time; or worst case scenario it's a dud from the start. :sadbanana:
I have absolutely no personal experience with anything other than the SPEC unit for the Sonic. I have over 30K on mine without one single problem. It's handled the big turbo for over 20K too.