Sonic Peformance Parts from Chevrolet
- Thread starter Amoral
- Start date
sx sonic
New member
And Trifecta is fine with tuning ya up to ~200 ft lbs of torque before a clutch is necessary for more power. At which point it costs about $1k to get a clutch that has way more holding power than necessary, and if you get a stage 1 or 2 clutch is still very streetable.
The exhaust and tune doesn't sound bad for 14 and up Sonic owners looking to keep their warranty but It's going to cost $1,500-2,000 for the 12 & 13 owners to get up to speed. That's outrageous for 10hp and 15tq.
Then there's the question of how good is the new clutch, how much more tq can it hold. I've no doubt It's better but we're talking about a "revised" stock clutch on a commuter car and can't be much of an improvement; surely not as tough as a Stage 1 aftermarket clutch.
The exhaust and tune doesn't sound bad for 14 and up Sonic owners looking to keep their warranty but It's going to cost $1,500-2,000 for the 12 & 13 owners to get up to speed. That's outrageous for 10hp and 15tq.
Then there's the question of how good is the new clutch, how much more tq can it hold. I've no doubt It's better but we're talking about a "revised" stock clutch on a commuter car and can't be much of an improvement; surely not as tough as a Stage 1 aftermarket clutch.
SilverScion
New member
You are correct with everything you've said, but from my experience with tuning other cars, this is cheap. On most non-turbo cars you won't get more than 10-15% HP gains without significant upgrades to either raise compression or add boost. The factory boosted cars I've dealt with have the same limitations. Get more than 20% over stock and the clutch becomes an issue, that number is of course relative. I'm no expert and I've only looked at and worked on cars I'm interested in.
My goal is not the GM performance tune, it's getting all of the factory supported mods onto the car, and then an aftermarket tune to make the most of them. A clutch is going to cost what it will cost, yes I'm apprehensive about what kind of power the '14s will handle, but that's only going to remain an unknown for so long. Should it prove to not be worth it, I don't have to buy it.
I'm not going for full race, I drive close to 600 miles a week, drive ability is a big concern. I don't want the car to be too loud, and a rave clutch in bumper to bumper stop and go traffic will quickly make me feel like I've wasted a lot of money on a heavy clutch. I want as much performance as I can get while keeping the car practical for my needs.
-Sean
Typoed on my iPhone.
I'll try to put the GM performance parts tune on my Sonic after work today.
Might not be as simple as the RS change was (simple manual RS vin entry). It says something about an authorization code. Ive never seen a locked calibration on our programming system, but Ill let you know after I try in a few hours
Might not be as simple as the RS change was (simple manual RS vin entry). It says something about an authorization code. Ive never seen a locked calibration on our programming system, but Ill let you know after I try in a few hours
ripper806
New member
ZZP has a Big brake kit for the Sonic's priced at $400
ZZPerformance - 12" Front Brake Kit #ZZ-12BRKSNC
laborsmith
New member
Good correction. I had forgotten about the ZZP option. I admit I was remembering how much the big brake kit cost when I put one on the '03 Cavalier.
Laborsmith
Laborsmith
laborsmith
New member
No surprise here. I suspect the same would hold true for the intake.
As a side note, one does not need a calibration for a high flow cat-back exhaust but one does need a calibration for a high flow intake to avoid throwing a CEL. I can not recall if the GMPP exhaust is more than a cat-back.
Laborsmith
sonic24740
Zippy
i guess i am just lost.. where are you all finding prices for these..
SilverScion
New member
TheLorax
New member
Well it looks like they are just rs struts/shocks with slightly less travel. I really wish someone would come out with some decent aftermarket struts/shocks.
$ub$onic
The Sticker Guy
Correct me if I'm wrong but it looks like there basic upgrade is rs struts that just sit a tap lower
sx sonic
New member
That's the way I'm reading it. RS front struts with stiffer springs that are another 10mm lower (20mm lower than an LS/LT/LTZ). It does say "redesigned rear shock", so it may have revised dampening, or it's only to adjust the internals for the right length.
It also says the jounce bumpers are different which may be advantageous for autocrossers
It's a good deal for non RS owners looking for stiffer springs and dampeners without spending the coin for aftermarket coilovers
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