CTS V -hp and Mileage vs JAG S type R

[rickp]

JEM, yes the mileage I get is nice considering the performance stand out as my daily driver. I really like the total physical package of the V but the uber HP and the much lower mileage estimates are a concern. Something in between my mileage and the V is my goal.

Per previous suggestions I have looked into wait4me mods which sound almost too good. I asked for less gas (for less power) and they promise you more power for less gas!

Gotta sleep on that.

[jvp]

Originally Posted by rickp

Per previous suggestions I have looked into wait4me mods which sound almost too good. I asked for less gas (for less power) and they promise you more power for less gas!

My suspicion is that the tuners are leaning out the A:F mixture a bit to get you the increased mileage and power. Whether that's safe for the (supercharged!) engine or not remains to be seen...

jas

[CIWS]

Originally Posted by jvp

My suspicion is that the tuners are leaning out the A:F mixture a bit to get you the increased mileage and power. Whether that's safe for the (supercharged!) engine or not remains to be seen...

jas

On the STS-V's factory tune they were set Pig Rich for WOT. The A/Fs would drop off something below 10 and stay there.

[jvp]

Originally Posted by CIWS

On the STS-V's factory tune they were set Pig Rich for WOT. The A/Fs would drop off something below 10 and stay there.

I'm sure. "Pig Rich" as you call it is safe for the engine though, specially when a supercharger is involved.

Just sayin'....

jas

[CIWS]

Originally Posted by jvp

I'm sure. "Pig Rich" as you call it is safe for the engine though, specially when a supercharger is involved.

Just sayin'....

jas

Sure, up to a point where you start fouling plugs. But we kinda recognize Cadillac tunes the cars to be able to go anywhere they're shipped and function without concern for air density, humidity,etc. However I think an owner can safely have the car leaned out a bit without sacrificing engine safety as long as they understand it needs to stay safe and not go for the edge.

[GMX322V S/C]

Originally Posted by jvp

My suspicion is that the tuners are leaning out the A:F mixture a bit to get you the increased mileage and power. Whether that's safe for the (supercharged!) engine or not remains to be seen...

jas

I think it's probably safe--with margins even, but NoX probably goes through the roof.

[rickp]

Are you fellows saying that the claims by tuners of mileage and HP improvement are within the realm of believability "to those in the technical know" without necessarily destroying the engine or the auto transmission?

[MrEr1c]

Originally Posted by CIWS

On the STS-V's factory tune they were set Pig Rich for WOT. The A/Fs would drop off something below 10 and stay there.

to put this into perspective, many people in the cobra mustang world have their supercharged cars tuned to an A/F ratio of 12.5 which is about the max you should go while keeping it relatively safe. All of this is relative to the conditions at where you live though.