RPM @Max Torque?

[Hot Air]

What is rpm for max torque?
Conrad

 

[TurboDave]

Depends entirely on the build/engine/etc. etc. etc. There's no specific answer.

 

[TurboTnZ06]

With a small cam, enough boost and low rpm means high cylinder pressures which then equals lots of torque, say 3000 rpm or so. Hard to measure since dynoing too low of an RPM will kick down into 2nd gear instead of staying in 3rd.

 

[Hot Air]

Please check out details in my signature for engine specs.
Conrad

 

[HighPSI]

I doubt you will get your engine to operate at peak torque.
When I put a Buick engine on an engine dyno, the torque was much lower than the convertor stall speed

 

[TurboBob]

On cars like these, max torque will happen at the lowest RPM where you can achieve full boost.

Bob

 

[bison]

Depending on the cam it will usually be lower than the flash stall speed. As Cal mentioned the engine will drive into the converter and go beyond that rpm fairly quickly and not load the engine enough to operate at that that rpm. Id rather be 1000 rpm higher at 92% mass efficiency vs 1000 less and at 96% mass efficiency any day. Also the cylinder temp and detonation tendency will be higher if operating at peak torque over time.

 

[gnjones231]

My pretty much stock 87 has a peak torque at 4000 rpm.

 

[bison]

My pretty much stock 87 has a peak torque at 4000 rpm.

It should peak lower than that