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What mods to make?

17K views 15 replies 9 participants last post by  wspohn  
#1 ·
On my first Solstice I had engine, chassis, brake and tire mods done before I took possession. I am getting another Solstice this month and want to space the mods out so I can experience their effects. Forum members, what mod do you recommend I do first? Car is a 2009 NA Auto Coupe. Tires are original. I plan to drive 3000 miles a year, summer only, but rain a possibility. Some driving will be enthusiastic twisties ala KY 227 at NASSAM 2017 and Twisted Sisters ala Kerrville 2017.
 
#10 ·
Both my coupes are listed, 938 in AZ and 819 in OH.
 
#3 ·
well...

I think this is more maintenance than mods

but

- change tires asap !
- change brake fluid
- change power steering fluid
- change antifreeze
- change battery ( probably... )

I'll be watching this as my NA coupe is also stock...
 
#12 ·
Very important, and I was not thinking about these.
 
#4 ·
Bought my GXP Coupe last year. My mod flow was as follows:
1) Find and buy a soft top. I was lucky. A forum member had one for sale. I paid full price. $1200.00 US plus shipping. I would later have it recovered by JPM in black sail cloth.
2) Because yours is an NA I won't go into what I did mechanically but a DDM backbone and probeam are a must.
3) Speaking of a must....backup camera is really a must in these blindspotted Coupes. I replaced the head unit with fully loaded Kenwood ( Apple Car Play etc). The back up camera takes the chest tightening fear out of backing up.
4) Norm's recessed grilles.
5) Safe all OEM parts so Coupe can be returned to stock.

Congrats on getting a Coupe!
 
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#11 ·
Came with a soft top, TG. They seem impossible to find.
A cheap GPS w/ back up camera is going on soon, new head unit in the future, AZ coupe has a NAV radio w/ BUC.
 
#5 ·
First thing is obvious. He is still driving on factory tires. Ditch them ASAP

Otherwise, given that it is an NA and power mods are futile (short of turbo/supercharging), handling mods would come next.
 
#7 · (Edited)
Like others have commented...

1. Tires - The stock tires sucked. Old stock tires suck even more. Get some good shoes on her.

2. Suspension - I did all braces, sway bars, and coil overs. Made a world of difference.

3. Boost it - Who doesn't like more power. Just note you're limited to about 250 at the wheels but that still is a world of difference.

If you don't want to go this route there are minor gains to be had with exhaust, intake, high flow cat and tune but don't expect anything mind blowing. The intake really just improves the sound of the car as does the exhaust but the exhaust will add about 7 hp to the wheels. Intake and exhaust does wake up the mid range punch of the 2.4. The Trifecta Tune also ups the HP by only 15 ponies or so but really improves low and mid range RPM performance.
 
#13 ·
Scheduled for tomorrow:

- flush and change brake fluid to DOT4
- change power steering fluid
- flush and change antifreeze
- change oil to synthetic
- tranny and diff TBD
 
#14 ·
Of my mods, I'd recommend:

1. Great tires and brakes. This will make a HUGE difference, and they probably need to be changed anyway. For pads, talk to Todd @ TCE (forum supporting vendor). If he doesn't have what you want, check out Porterfield. Somewhat expensive, but they're the only race pad I use. (I haven't tried their street stuff, though!)

2. Brace package - just get the whole set from DDM. The price is right, installation was easy, and it's a very dramatic, positive change.

3. Adjustable shocks. The BC coilovers are great, and 95% as good as the stuff that's twice the price. I lowered the car about 1.25" with these. On the street, even the softest shock setting is way better than the stock Bilsteins, and being able to tighten things up for the track is great.

Note that the factory shocks and springs *ARE* coilovers already, which is nice since you don't need a spring compressor to remove and reinstall them. What you get from aftermarket is adjustability, and being able to configure the car for your driving style, be that racing, spirited driving, or wanting to not feel any bumps in the road.

4. Forced Induction. Be careful with this and, if you do go this route, I'd seriously consider a supercharger over a turbo.

5. Cat-back exhaust. You won't get much, if any, of a perf gain out of this on an NA, but a great exhaust just makes the car more fun. I like my Borla, but others have had great success with Solo and Magnaflow.

6. Anything Norm makes.

Good luck!
 
#16 ·
Of my mods, I'd recommend:

1. Great tires and brakes. This will make a HUGE difference, and they probably need to be changed anyway. For pads, talk to Todd @ TCE (forum supporting vendor). If he doesn't have what you want, check out Porterfield. Somewhat expensive, but they're the only race pad I use. (I haven't tried their street stuff, though!)

3. Adjustable shocks. The BC coilovers are great,
I run the Porterfield R4S on my street Z4M and ca report that they are excellent street pads- good braking from cold and zero fade on the street. I run EBC Redstuff on the Solstice - low dust ceramic and also very good.

Ditto on the BC Racing shocks. One of the great bargains out there.
 
#15 ·
All good ideas and maintenance should be done. I'd like to add that tires MUST be at the top of your list before we read about you spinning out on a damp road and smashing up your new coupe. Do it now, those stock tires are deadly.