VIPRETR

i spoke with one of the tuners here and he said that when tuning, it is more important to turn off the torque managment systems than anything else. it is more important than changing timing and fuel curves..


is he right?
why? or why not?
should i let him tune my car ?





fill me in here. i know little about this topic. tuning is somewhat french to me..

davidfarmer

Appearantly, the Torque Management is more aggressive in the C6 than the C5. In daily driving, I really don't notice it, but the PCM limits power to protect the drivetrain, especially during shifts.

If you are doing mods to increase the power, you need to remove/adjust the Torque Management, or the power will not be usable.

I can't speak to the quality of individual tuners.

VIPRETR

does the trans type make a difference?
i have a m6

niphilli2

Trans type does not really matter, it is invasive on autos, MN6s, and M12s. I dont know if I would turn it off completely though. Is it somethingthat can be scaled?

BTW: I agree with the tuner completely, the torque management is the signle biggest contributing factor to the fact that the C6 is not much faster than the C5.

VIPRETR

davidfarmer

yes, it can be scaled with LS2edit. You have rpm limits from 500-3000 rpm (engine torque), then have absolute limits for the transmission and axles. All can be raise a little, or raise a lot (therefor effective removing it completely)

I disagree with TM being the primary reason the C6 and C5 have compairable performance.
The reason the C5 is just as fast as the C6 is that they are basically the same car. The C6 has a slightly larger engine (5%), but smaller camshaft when compared to the C5 Z06. The trans, diff, brakes are the same. The C6 actually as a worse weight distribution, since they moved the rear wheels backward 1.2". This puts more weight on the already overloaded fronts, and takes weight away from the rear tires, where grip is needed.

MikeyTX

Me too

Brett Hunter

I wouldn't turn it all off completely. As David stated you can adjust the TQ by rpm and gear and still get the same effect without the loss of your safety systems. Below are some 1/4 mile runs that I made with 3 different settings of TC and AH. My previous best with all systems off before the tune and tweak of TQ settings was 12.99. These were done on a very traction limited track as noted by the 60' times. The previous best was also done on the same track. Also notice that the time with all systems on nearly matches my previous best with all off.

With all of the tuned cars busting differentials I am a little afraid of turning every thing off.

1st run: All systems on
60' 2.389
0-60 mph 4.976
330' 5.920
1/8 mile 8.712 @ 91.15
1000' 11.057
1/4 mile 13.026 @ 114.83


2nd run TC off:
60' 2.154
0-60 mph 4.314
330' 5.519
1/8 mile 8.253
1000' 10.568
1/4 mile 12.515 @ 116.13


3rd run TC and AH off:
60' 2.149
0-60 mph 4.221
330' 5.481
1/8 mile 8.190 @ 93.52
1000' 10.483
1/4 mile 12.412 @ 117.19

stabori

They put it in so that the rear doesn't blow. This has always been the weak link because these are not drag cars, even though we use them like a solid steel rear, they are not.

bunk22

Great times! Any mods?

Fore58

You mentioned a very good point about the smaller camshaft. It appears that when someone installs a bigger cam in the C6 it just wakes up tremendously. I thought maybe it could be the headers holding it back a little to compete with C5 Z06 engine performance. When you do the exact same mods to both cars, it seems like the C5 Z06 is always at least 10 hp more.

eugenee326

Can retuning for torque management be set different for 'D'rive and 'S'port modes on the A6? I love the normal driving and shifting in 'D' (except for the 'gear hunting' issue that I, and others, are experiencing - which supposedly has a fix). However, I would also love to feel significantly stiffer shifting in 'S'.

Brett Hunter

Thanks, yes I do. Tune, Halltech Stinger and Dynatech Supermaxx headers. I still use the stock mufflers.


I don't believe anyone can tune the 06 yet.

JeffB185

Can someone explain the LS2 Edit to me? I just bought a C6. I have some automotive background in that I spent 15 years drag racing with my dad. He collected corvettes when I was young (10 at one time was the most). He passed away a few years ago and I have just started getting back into Corvettes. When he passed he left me a great 67 that I am going to get back on the road (damn brakes from sitting) and my sister a perfect 1960. All my experiance is pre computer cars so I am a little in the dark. I love my C6 and I am looking to pep it up a little. Sorry for rambling on and please accept my "Thank You" in advance.

davidfarmer

LS2edit and HPTuners (as well as others) are programs that let you directly modify the fuel and spark tables, as well as other parameters (in autos, shift points, rev limits, torque management, gear changes, tire size correction etc). Basically, you need a wide-band O2 sensor (most Dyno's have them) and you can adjust your wide-open table (PE Table). However, with logging software, you can dial in all of your tables for not only more power, but better throttle response, etc.

Depending on your goal, it can be very time consuming.

Mr.Big

L.P.E. can...
Jeremy

Brett Hunter

That's good news! I wonder what other updates are available for LS2 Edit?

shopdog

Uh, actually, they moved the front wheels forwards. The C5 had a weight distribution of 51.5% front, 48.5% rear. The C6 has a weight distribution of 51% front, 49% rear. In other words, the C6 puts more weight on the rear than the C5.

davidfarmer

The did NOT move the front wheels forward. The did shorten the front of the frame, but the front wheels are in the same location relative to the rest of the car. The changed rear subframes and upper control arms, which stretched the wheelbase 1.25".

If the C6 has more weight in the rear, it is due to trim, not chassis.

VIPRETR

can bigger cams be installed w/o heads ?