[MP81]

3" is pretty common for up-sized turbo piping for an I4. The OEM Cobalt SS/TC exhaust, which I run on my Cobalt, is 2.5" all the way back.

Dual 3" exhaust is overkill even on most V8s, unless you're getting into the over-500 HP range.

 

[MP81]

I just re-read this. The stock Cruze diesel rims were 18x7.5 so the Verano rims would be a good option for the dieselers.

Stock CTD wheels are 17x7.

 

[MP81]

I mean, there's always Woodward. There's a 1.4T Cruze that runs around without a hood and with an open downpipe. It's rather hilarious.

 

[MP81]

They wouldn't work on it if it was tuned...but yet they work on a car that is more Verano than Cruze? That's pretty funny.

Also seems odd, the tune shouldn't affect the BCM in the least.

That said - the 2.0T is definitely down to produce that much power. I know the LNFs with the Trifecta tune in the Cobalts made 350HP easy.

 

[MP81]

The dealer I took it to is known for working on all stock swap cars, like a v8 swapped g8 with all factory components. I just didn't want to risk them refusing to do the work if their system flagged a tune in the ecu.

Also, the Verano is de-tuned from the factory so it's not a direct competitor with the regal with the same engine. GM has done similar things in the past, the more expensive one usually has more power even with the same engine.

2011–2013	Buick Regal GS	270 hp (200 kW)[SUP][7][/SUP]	295 ft⋅lb (400 N⋅m) @ 2400 rpm
2013–2016	Buick Verano Turbo[SUP][8][/SUP]	250 hp (190 kW) @ 5300 rpm	260 ft⋅lb (353 N⋅m) @ 2000 rpm

Based on the torque peaks being in a different location, I wonder if a couple other things are changed besides the tune.

But otherwise, it should be basically the exact same engine itself - throttle body to turbo - but anything before or after might be different enough to shift the torque curve.

Either way - it's a 2.0T - it'll make assloads of power. Did you retain the ethanol mix sensor?

 

[MP81]

Odd, because it uses the LHU, which is the flex-fuel version of the LDK. Interesting...

 

[MP81]

Gotcha, so you just need to add the sensor.

I need to look into what is required to do this on my Cobalt. Dealing with E85 blend changes as it transitions into summer blend is a major pain in the ass, as it's extremely sensitive.

 

[MP81]

Doesn't surprise me that people are already out there, haha.

Back when I still lived in Royal Oak, I'd be one of those people.

 

[MP81]

Stage 3 or Stage 3+ (assuming Spec)?

 

[MP81]

Ahh ok - reason I ask is because the Stage 3 is a six-pick, the Stage 3+ is a disc, so it's a LOT easier to drive, with the same power handling.

 

[MP81]

Gotcha. Hopefully it's not too much of a pain in the ass to drive. Puck clutches usually suck.

I remember my buddy had the clutch replaced when he had a built-WRX trans installed on his EJ25-swapped '01 RS years back, and it was always an absolute pain to drive. He had told them he didn't want a puck clutch, and they swore they didn't put a puck clutch is.

Fast forward a few years and we're pulling the engine...guess what we find? Puck clutch.

 

[MP81]

It may very well have a higher limit, yeah. But it's definitely more driveable being a disc-style instead of puck-style.

 

[MP81]

Sounds like a neat idea - reminiscent of the old-school way to do it (or the Challenger Scat Pack/Hellcat/Demon way), but it also sounds like asking for trouble in regards to sealing it to the lens.

 

[MP81]

It may actually be beneficial to cut the hole smaller, then heat it up and form it inwards so you have sealing on two surfaces rather than one - it would also make the sealing butyl less apparent, and would be a cleaner air entry into the lens.

 

[MP81]

That will look cool as **** with the halo around the intake tube. Are you using clear plastic for the tube? The halo refracting through that would look awesome.

 

[MP81]

Nothing worse than crappy halos - problem is there are a lot of them out there...

 

[MP81]

With those trap speeds (and your dyno figures), you should be deep into the 13s, assuming you can hook, which it sounds like is probably an issue.

For reference, my Cobalt has run a best of 14.10 back when I had 195/60R15 all-seasons that didn't even remotely hook. I haven't had successful runs since I've had the ZIIs, but high-13s with an actual launch should be doable - or at least in the past it probably was.

 

[MP81]

I like how that turned out.

 

[MP81]

@Taxman 17.9 was a silver SSR and it looked stock but I wasnt paying attention to how his run went

Apparently not well - even the original one with the 5.3L will run a mid-15. With the LS2, it drops to very low 14s.

 

[MP81]

Meh, I'd have just put a resonator on it and called it a day.

Friend of mine just bought an '09 Cobalt SS pushing probably 350whp or so (on an LTG block), and has the TurboXS RFL exhaust on it. It's loud, but not too obnoxious. Good tone, too. Well, for an Ecotec.