Stock RPM

F

Farmer

New Member

Joined

Feb 4, 2016

• Dec 5, 2016

• #1

On a solid good running engine, what would be the highest rpm to push it? Don't want to over rev my 70,000 mile engine.

Thanks

 

WarWagon

Caustic Cacophony

Joined

Mar 10, 2007

• Dec 6, 2016

• #2

Stock draw though setup=4950-5000rpm.
Actually 4800rpm is probably even better given how horrible the air flow is on these engines and the turbo blowing hot air.

 

F

Farmer

New Member

Joined

Feb 4, 2016

• Dec 6, 2016

• #3

WarWagon said:

Stock draw though setup=4950-5000rpm.
Actually 4800rpm is probably even better given how horrible the air flow is on these engines and the turbo blowing hot air.

Click to expand...

Thanks WarWagon. I'm new to this v6 turbo. Why would the hot air make that much difference? It seems like the hot air would help keep the fuel & air atomized and not make much of a difference after combustion. Unless it would make chances of pre-detonation a problem. Is that it?

Thanks for your response.

 

WarWagon

Caustic Cacophony

Joined

Mar 10, 2007

• Dec 7, 2016

• #4

Farmer said:

Thanks WarWagon. I'm new to this v6 turbo. Why would the hot air make that much difference? It seems like the hot air would help keep the fuel & air atomized and not make much of a difference after combustion. Unless it would make chances of pre-detonation a problem. Is that it?

Thanks for your response.

Click to expand...

Your in the right thinking with your last thoughts, the fuel is indeed atomized well after making it through the compressor with the added heat from that. The air looses it's density of oxygen the hotter it gets as well as being more prone to detonation in that state.

 

F

Farmer

New Member

Joined

Feb 4, 2016

• Dec 7, 2016

• #5

WarWagon said:

Your in the right thinking with your last thoughts, the fuel is indeed atomized well after making it through the compressor with the added heat from that. The air looses it's density of oxygen the hotter it gets as well as being more prone to detonation in that state.

Click to expand...

Thanks, I think I see now.
In an older engine with the miles would maybe (no doubt) leave some hot gasses or carbon to pre ignite in the chamber when the valve opens to refuel (lower rpm would mean a little more time to burn out). I see how that could be a problem lol. Is that why some people put a water (or alcohol) spray on the intake?

Thanks again WarWagem

 

WarWagon

Caustic Cacophony

Joined

Mar 10, 2007

• Dec 8, 2016

• #6

That is exactly why the water/methanol injection is used. Significantly reduced intake temps, detonation control as well as extra high octane.