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CTS-V hp mods

3204 Views 23 Replies 11 Participants Last post by  trukk
I just bought my 2005 used CTS-V, and I am thrilled with the car.
It has a Corsa exhaust, and I'm looking for the next logical steps to upgrade.

I had a Subaru WRX STI, and that car was modified to about 340 hp. It also had TEIN Coilovers. I loved the way that car handled, however, it was like driving a go-cart - super quick and agile, but it just wore me out.
As far as the CTS-V goes, I'm looking for a little more throttle response, and small bumps in hp (I'd love a supercharger, but that will need to be later). I'm also looking for a little less body roll.

I'm looking at the K&N cold air intake, a short throw shifter upgrade, and wheel hop kit. I'm also looking at something for the suspension, maybe coilovers, but I don't see anything readily available.
Does anybody have a feel for what kind of hp gains I might get with the Corsa exhaust, and the K&N cold air intake? Anybody know of a meaningful and reasonable suspension upgrade?

Thanks,
Greg
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If you dont't already have them you should consider the FG2 performance shocks for the CTS-V. You can get them from Lindsay Cadillac. Contact:

Luke Butler

(703) 647-8670
[email protected]
I guess the FG-2 shock package is a Cadillac offered option?
What are the specifics? Are they adjustable for ride height, dampening, etc.?
I was thinking coilovers that are adjustable.
Thanks,
Greg
Also, what exactly does the "competition driving mode" do?

Greg
... It has a Corsa exhaust, and I'm looking for the next logical steps to upgrade. ... I'm looking for a little more throttle response, and small bumps in hp ... I'm also looking for a little less body roll.

I'm looking at the K&N cold air intake, a short throw shifter upgrade, and wheel hop kit. I'm also looking at something for the suspension, maybe coilovers, but I don't see anything readily available.
Does anybody have a feel for what kind of hp gains I might get with the Corsa exhaust, and the K&N cold air intake? Anybody know of a meaningful and reasonable suspension upgrade?

Thanks,
Greg
Get the Hotchkis anti-sway bars for body roll, forget the CAI -- no hp to be gained, get a B&M or UUC shifter (there's a TPIS and a Katech, too), UUC lightened flywheel would give you better throttle response, KARS kit or BMR for wheelhop though you'll still get a little, get a Ground Control kit which includes Eibach springs, and move up to the FG2 shocks if you don't already have them.

HP gain with the Corsa? Maybe 2.

If you want HP gains, get hi-flow cats and headers with a tune ... StealthV does a good tune and with that setup, you're looking at 25-30 HP. Want more? Gotta go with a cam, then maybe heads. Want more? Get a magnacharger. Want more? Get a better rear end first.
Get the Hotchkis anti-sway bars for body roll, forget the CAI -- no hp to be gained, get a B&M or UUC shifter (there's a TPIS and a Katech, too), UUC lightened flywheel would give you better throttle response, KARS kit or BMR for wheelhop though you'll still get a little, get a Ground Control kit which includes Eibach springs, and move up to the FG2 shocks if you don't already have them.

HP gain with the Corsa? Maybe 2.

If you want HP gains, get hi-flow cats and headers with a tune ... StealthV does a good tune and with that setup, you're looking at 25-30 HP. Want more? Gotta go with a cam, then maybe heads. Want more? Get a magnacharger. Want more? Get a better rear end first.
Yeah but I think that Rick only deals with supporting members :thumbsup:

Oh sorry welcome from Southwest Florida!
Competition driving mode disables you traction (wheelspin) control and raises the threshold at which your Stability Control activates. It also makes the "actual" throttle position closer to the "commanded" throttle position, which gives you slightly better throttle response.

There is some great information about your new car at www.cadillacfaq.com. This sire is run by one of our members here, Reed (ctsvett). Lots of good reading there.
Thanks for the input.

What hi-flow cats and headers do you recommend?

To theloanman219,
not sure I follow the comment regarding supporting members.
I have Kooks 1 3/4 headers and Magnaflow cats I purchased from TByrne Motorsports. Good power increase and phenomenal sound- mean, nasty, badass sound.
... What hi-flow cats and headers do you recommend? ...
I bought them from Kooks. You could also get headers from B&B or Stainless Works. I think B&B has cats available with their headers, not sure about SW. Random Technologies makes hi-flo cats, but not sure what's involved in mating them up to various headers. Some guys go without cats entirely.
To theloanman219,
not sure I follow the comment regarding supporting members.
Supporting members have faster access to PM. Not only that It helps keep our community available for all of the resources that it offers. We have special member pricing to all the vendors for aftermarket parts. You are new the V so you WILL have many questions and there are guys here that know more about this car then the guys who designed it! It's worth the money in MOD savings alone. So join and welcome to the family :thumbsup:
I have Kooks 1 7/8 w/ Magnaflow exhaust. Sounds very nice and throaty. I had hwy droan w/ just the exhaust but, oddly, it went away after adding the headers. A tune by Rick (StealthV) is a must whether N/A or blown! He can get rid of the skip-shift, increase throttle response, keep your coolant temps down under 200 degrees and many other things!
Get the Hotchkis anti-sway bars for body roll, forget the CAI -- no hp to be gained, get a B&M or UUC shifter (there's a TPIS and a Katech, too), UUC lightened flywheel would give you better throttle response, KARS kit or BMR for wheelhop though you'll still get a little, get a Ground Control kit which includes Eibach springs, and move up to the FG2 shocks if you don't already have them.

HP gain with the Corsa? Maybe 2.

If you want HP gains, get hi-flow cats and headers with a tune ... StealthV does a good tune and with that setup, you're looking at 25-30 HP. Want more? Gotta go with a cam, then maybe heads. Want more? Get a magnacharger. Want more? Get a better rear end first.
I bought them from Kooks. You could also get headers from B&B or Stainless Works. I think B&B has cats available with their headers, not sure about SW. Random Technologies makes hi-flo cats, but not sure what's involved in mating them up to various headers. Some guys go without cats entirely.
:yeah: rand49er covered it nicely.


I'm running on 05 with Kooks long tubes and the Corsa exhaust.

As far as sound I can offer two different sources, post headers. (click on the pic)




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^^ Yup. :) ^^

When my car got dyno'd, that was the first time I'd been behind it to hear the exhaust. I had to put my hands over my ears ... and, I ain't lyin'! :thumbsup:
I have Kooks 1 3/4 headers and Magnaflow cats I purchased from TByrne Motorsports. Good power increase and phenomenal sound- mean, nasty, badass sound.
hey how much did those run you, including installation? curious.
Supporting members have faster access to PM. Not only that It helps keep our community available for all of the resources that it offers. We have special member pricing to all the vendors for aftermarket parts. You are new the V so you WILL have many questions and there are guys here that know more about this car then the guys who designed it! It's worth the money in MOD savings alone. So join and welcome to the family :thumbsup:
How do I join?
I take it your car hasn't been tuned yet, yes? Where do you live?
hey how much did those run you, including installation? curious.
Well, the price of stainless has gone up since I did mine, and so the price of headers has gone up as well. I paid approximately $1,200 for the headers and cats, and the installation was only $150 since I work at a shop and paid a tech on the side. A lot of forum members have installed them themselves- there's a great writeup at www.cadillacfaq.com.
I have Kooks 1 3/4 headers and Magnaflow cats I purchased from TByrne Motorsports. Good power increase and phenomenal sound- mean, nasty, badass sound.
Excellent advice.

If I had it to do over again I would do the following order for mods:

1) Upgraded shocks (I wne FG2, $1000 ish)
2) UUC Short Shifter ($400ish)
3) Kooks + Cats ($2000ish. Tune is a must)
4) Cat back (strictly for sound)
5) CAI + Throttlebody + tune ($800ish, could be done for alot less)

I have the following on my horizon unsure the order:

1) Track rims + R compounds (expensive proposition for the V, due to size/bolt patterns. $1500+)
2) Ground Control Kit (front coil over spring, to rear springs)
3) Fast 90 MM intake Manifold + Nick Williams Throttle body & tune ($1200 ish. This is pretty much the last of the boltone for me.)

Down the road:

1) Cam upgrade [cam, springs, pushrods, Ti retainers, underdrive pulley, ls2 or dual roller timing chain, install, tune, prehaps upgraded rockers] ($2500+)
2) Fatty Heads [Heads, gaskets, valve job, Caddy lifters, tune ($2500+)

The list keeps going :D

Have fun, and to quote many "YOU'RE DOOMED" :thumbsup:

-Chris
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