Does timing advance make it more difficult on oil?

[MrWideTires]

Tomorrow I'm gonna advantace the timing in my Spec-V a little.. just 2 degrees (to 17 BTDC) because that's all the computer lets you do.

But it made me wonder if having the timing advanced was easier to harder on oil..??

MY theory is that having you timing retarded should be more difficult because it makes the engine run hot, but at the same time.. with timing advanced you're putting a bit more stress on the engine.. so i dont know.

 

[StevieC]

It's actually the opposite... Retarding the timing makes the engine run a tad cooler and decreases the NOX emssions from the combustion. Advancing the timing creates hotter cylinder temperatures and higher NOX emissions. (In most cases)

 

[MrWideTires]

Originally Posted By: StevieC
It's actually the opposite... Retarding the timing makes the engine run a tad cooler and decreases the NOX emssions from the combustion. Advancing the timing creates hotter cylinder temperatures and higher NOX emissions. (In most cases)



I was tought for years (at my auto service class) that timing advance makes your car run more efficiently.. thus giving you better mileage, a bit more power with better response, and less emissions....

 

[expat]

An over retarded engine will blow 'still burning' gasses out past the exhaust valves, the Head will be hotter. Optimal timing will allow the burning gas to dissipate heat throughout the cyl.
More energy is used within the cyl, = higher efficiency.

 

[BuickGN]

Retarded timing increases exhaust gas temps but it reduces combustion chamber temps.

I would think that more timing would put a little more heat into the oil since it should cause the piston temp to go up. In the real world I doubt you could measure the difference in oil temps.

I've run EGT guages for many years and timing makes a very large difference. I had it set up for a while where I could retard timing for a second to make the turbo spool much, much faster and then advance it back to normal after a second or so.

 

[92saturnsl2]

That 2 degree difference in timing that still lies in the engine's performance potential will not affect oil longevity, or any other engine attribute any significant (if even measurable) amount.

Most manufacturers give a +/- 2 degrees tolerance, plus a safety margin after that.

Retarding timing increases exhaust temps, but lowers cylinder heat and pressure, effectively reducing engine efficiency and worsens emissions.

 

[duaneb9729]

did you do that through the cars computer BuickGN?

 

[Audi Junkie]

Detonation makes the oil run mad hot.

 

[BuickGN]

Originally Posted By: duaneb9729
did you do that through the cars computer BuickGN?


I wish. I wanted to do a MAF vs TPS to control timing but I was told it was impossible. Basically a low MAF reading coupled with a very high TPS reading would be "spool mode".

Instead I did it with a push button that was normally on but when pushed broke a connection. It went into one of the coil pack module wires that pulled timing back to something crazy like 5 degrees. It was only for a second. By keeping it on the headers would glow at idle and the wastegate couldn't control the boost. Even the inconel exhaust valves were probably hurting.

 

[mechtech2]

With today's ignition advance starved cars, that 2 degrees extra is probably worthwhile to achieve.
I'd feel it.
Don't worry about any difference in temperature. Enjoy the better power and gas economy.