Torque Management System - C6
Dyno runs would show evidence of torque management, if such a thing existed. I've never seen one that does. I think TM is "Aside from racing, Yunick's innovations include variable ratio power steering, the extended tip spark plug, reverse flow cooling systems, a high efficiency vapor carburetor, a high efficiency adiabatic engine, various engine testing devices, and a safety wall for racetracks, made of discarded tires, which France had refused to consider. He was granted twelve patents."
http://en.wikipedia.org/wiki/Smokey_Yunick
"A sly mechanical genius whose reputation as one of the premier mechanics in NASCAR hasn't diminished over the years, Henry Smokey Yunick was the "Best Damn Race Car Mechanic" who worked out of the "Best Damn Garage In Town," in Daytona Beach, Fla."
http://www.motorsportshalloffame.com...unick_main.htm
"The legendaric Smokey Yunick is not just a world champ in fusktrim(?) He is also genious. The best prove so far is called the "Hot Vapor". A new engine which will revolutionize the hole automotive industry. Smokey's self constructed 2 cylinder engine gives the double horsepower as a standard 4 cylinder engine of the same size. Further more is uses much less fuel and exhaust much less polution. Hot Vapor is almost too good to be true. But an enthusiastic Bostic is convinsed. It is true! "
"GM, Ford, Chrysler and many foreign car manufactors comes around in "Best damn garage in town". To stress test Smokeys test cars with the new engine. It is the best engineers from the manufators who show up andd they come several times. Smokey is laughin. They come back because they can not get the engine to spike. Some of them does everything to get the engine spiking. No one has succeseeded. "
http://schou.dk/hvce/
but, this wasn't meant to be a discussion about smokey, but rather some information about running too cool.
Re your other post, about Smokey Yunick, he died in 2001. I remember one of his NASCAR "tricks" was to drill a small hole in the top of his headers. His competitors all thought it was another one of his secret tuning tricks that nobody could quite figure out. Later Smokey revealed that the hole was there so he could see the color of the exhaust gasses, determine the temperature, and then adjust the A/F mix accordingly.
A few comments about his thoughts on operating temps:
1. To my knowledge, he never tuned an LSx aluminum block engine. They do not necessarily have the same thermodynamics as an SBC.
2. Just because an engine has a 160 or 180 degree thermostat in it does not mean that it will operate at that temp. Most of these cars will still operate right around 195-200 degrees, depending on the fan settings, ambient temperature, operating conditions, etc. They just won't heat up as quickly.
3. There are dozens of reputable tuners and suppliers who offer the lower temp thermos, and/or recommend that optimal operating temps for the LSx engine is just under 200 degrees. I don't know of anyone who recommends operating temps above 220 degrees. Hundreds of independent dyno tests confirm this. Smokey MAY be right in theory, but in actual practice a lower operating temp seems to be optimal for LSx engines.

Re your other post, about Smokey Yunick, he died in 2001.
1. To my knowledge, he never tuned an LSx aluminum block engine. They do not necessarily have the same thermodynamics as an SBC.
i find it real interesting that he was saying to obtain max. power from the sbc it should run around 200-220 but not too much higher than that.
doesn't the stock fan settings have them coming on around 221 ?
Last edited by Zig; Sep 13, 2006 at 10:28 AM.

for us uneducated types, would you mind elaborating ?


Last edited by Whiterock1; Sep 13, 2006 at 12:07 PM.
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What is not clear is exactly what algorithms are used to measure TQ, and exactly how it is managed. It's also not clear how the programming is different between an M-6, an A4, an A6, and a Z06. The A6 apparently has its own computer, and over 100 different tranny control tables.
If you don't believe it exists, then you don't need to worry about it. I have an A6, I believe it does exist, and so does HPTuners. When their new beta software is wrung out by the many dyno tuners out there, I'm sure that more information will come to light. When the non-beta production version of HPTuners comes out, I plan to buy it and use it for tuning. The very first thing I will do is edit out TM, or at least scale it back some. Until then, I will wait patiently.
And the likes of GM High Tech Performance, Corvette Enthusiast and High Performance Pontiac, magazines that deal specifically with the LSX engines HAVE in fact talked about it.
And someone comparing characteristics of an iron block/heads, non computer controlled, carburated SBC from 1975 to a modern day aluminum EFI motor is clearly the spewings of the uninformed IMO.
I know this from bracket drag racing. I have done literally hundreds of runs in C5's and C6's. I commonly predict my dial in dead on and I am almost always within 1-2 hundreds of a second. I mention this so members realize there are some people commenting on TM and engine coolants temps from a practical standpoint, not theoretical. If my engine temp goes up to 200 or higher I will lose .05 give or take a hundred.
That's fact, the rest of the speculation without experience is just that. Incorrect speculation by someone who probably does not have the practical experience to know any better. Just that simple.
On the speculation that TM does not exist. That too is incorrect. Many new cars use TM. Not just the C6. Do a search on the Internet and you will find tech articles on TM from anything from a Ford Taurus to a Z-06. Call the people at LS2 edit or HP tuner and tell them there is no TM. TM is a common computer control in modern cars, get used to it.
Fan settings, yes you should change them to correspond with the opening of the thermostat. This is how you achieve your set point for your operating temps.
The argument that a lower T-stat does not effect operating temps fly's in the face of logic. If that is the case why not a 250 degree thermostat?
For drag racing a lower thermostat (160), enables you to control your launch temp. How? Your coolant temp will now heat from 160 to your set point slower than it would with the stock Tstat (186-187). This is beneficial for consistency and faster ET's.
Although there is a technique in bracket racing where people try to run as hot as they can for consistency. The theory is you can always heat you engine up but it is difficult to cool it in the staging lanes. I have no problem with this technique by the way. I just prefer to take my chances with a lower T-stat and launching at 180.
If I just had a street car, no racing I would run the stock T-stat by the way.
If my engine temp goes up to 200 or higher I will lose .05 give or take a hundred.
For drag racing a lower thermostat (160), enables you to control your launch temp. How? Your coolant temp will now heat from 160 to your set point slower than it would with the stock Tstat (186-187). This is beneficial for consistency and faster ET's.
Re your other post, about Smokey Yunick, he died in 2001. I remember one of his NASCAR "tricks" was to drill a small hole in the top of his headers. His competitors all thought it was another one of his secret tuning tricks that nobody could quite figure out. Later Smokey revealed that the hole was there so he could see the color of the exhaust gasses, determine the temperature, and then adjust the A/F mix accordingly.
A few comments about his thoughts on operating temps:
1. To my knowledge, he never tuned an LSx aluminum block engine. They do not necessarily have the same thermodynamics as an SBC.
2. Just because an engine has a 160 or 180 degree thermostat in it does not mean that it will operate at that temp. Most of these cars will still operate right around 195-200 degrees, depending on the fan settings, ambient temperature, operating conditions, etc. They just won't heat up as quickly.
3. There are dozens of reputable tuners and suppliers who offer the lower temp thermos, and/or recommend that optimal operating temps for the LSx engine is just under 200 degrees. I don't know of anyone who recommends operating temps above 220 degrees. Hundreds of independent dyno tests confirm this. Smokey MAY be right in theory, but in actual practice a lower operating temp seems to be optimal for LSx engines.
you are right hittman and nascar and 1/4 mile are tottaly different and the in times smokey raced fluids were not the same. no mobil 1 in the weights we use today. the main reason being oil temp you had to thin it out with coolant temps.Zig i do remember smokey i seen that episode of legends of nascar a couple of years ago. but what dopes that have to do with torque management. and the only cool temp afect on our c6s is you have to reach 167 degrees in a certain time fram within so many cycles or limp mode can happen .and other computer problems.
Did not know this, thanks good post Dennis.
Magazines? What like Car and Driver? Please don't tell me you're quoting THEM as gospel now.
And the likes of GM High Tech Performance, Corvette Enthusiast and High Performance Pontiac, magazines that deal specifically with the LSX engines HAVE in fact talked about it.
And someone comparing characteristics of an iron block/heads, non computer controlled, carburated SBC from 1975 to a modern day aluminum EFI motor is clearly the spewings of the uninformed IMO.
But, I guess I just "spew because I'm uniformed." Until I see something objectively supporting the illogic of tm, I say it's
But, I guess I just "spew because I'm uniformed." Until I see something objectively supporting the illogic of tm, I say it's
you are wrong you wont see tm on dyno because you cant accelerate that fast on the dyno
But, I guess I just "spew because I'm uniformed." Until I see something objectively supporting the illogic of tm, I say it's
But torque management generally only rears it's ugly head under hard acceleration WHEN THE CAR HAS TRACTION, not while spinning it's tires and NOT while spinning a metal drum which is also FAR cry from accelerating a 3400+ pound (with driver) car that's dead hooking (aka: getting perfect traction) on the street or track.
Last edited by LS1LT1; Sep 13, 2006 at 05:34 PM.
But torque management generally only rears it's ugly head under hard acceleration WHEN THE CAR HAS TRACTION, not while spinning it's tires and NOT while spinning a metal drum which is also FAR cry from accelerating a 3400+ pound (with driver) car that's dead hooking (aka: getting perfect traction) ont he street or track.














