Thread: Which turbo can I get away with

Originally Posted by Dougal

Mine appears to be 3600rpm. Confirmed through checking gearing and road speeds.
Mine was fully balanced, but it's still fairly noisey and grumbly above 3000rpm. Spends most of it's time between 1500 and 2000rpm.

That's how I got 3400 on the ones I have driven. Found where you hit the governor in 3rd gear and calculated based on actual road speed.

No guarantees your pump hasn't been adjusted at some stage...

I find mine doesn't like to rev above 3000 rpm as well. Mine hasn't been balanced though.

Originally Posted by Bush65

What is your max rpm?

Dunno I'll have to find out

Anyone got a link to a decent calculator, I'm trying to find one

140km/hr, engine governor, 4th 1:1, Tx 0.996:1, final drive 3.54:1 on 35" tyres, rpm is ??

Originally Posted by rovercare

Anyone got a link to a decent calculator, I'm trying to find one

140km/hr, engine governor, 4th 1:1, Tx 0.996:1, final drive 3.54:1 on 35" tyres, rpm is ??

2945 rpm by my calculation, but that seems incorrect.

B92 8NW is correct. Seems like yours is governed at a measly 3000rpm.

To calculate for yourself:
35" x 2.54 / 100 = 0.889m * pi = 2.793 m = circumference of your tyre

140 km/h / 60 =2.333 km/min * 1000 = 2333.3 m/min

2333.3 / 2.793 = 835.5 rpm at the wheel

835.5*3.54*0.996 = 2945 ~ 3000 rpm at the wheels.

See that maths you learnt at school was useful for something


Btw - as a sparky you should know that AC power wouldn't have been possible without Rafael Bombelli defining imaginary number theory in 1572. Which was considered at the time a pointless excercise in pure mathematics - most of his colleagues took tghe **** out of him.... Imaginary numbers are things like SQRT(-1)

Originally Posted by isuzurover

B92 8NW is correct. Seems like yours is governed at a measly 3000rpm.

To calculate for yourself:
35" x 2.54 / 100 = 0.889m * pi = 2.793 m = circumference of your tyre

140 km/h / 60 =2.333 km/min * 1000 = 2333.3 m/min

2333.3 / 2.793 = 835.5 rpm at the wheel

835.5*3.54*0.996 = 2945 ~ 3000 rpm at the wheels.

See that maths you learnt at school was useful for something


Btw - as a sparky you should know that AC power wouldn't have been possible without Rafael Bombelli defining imaginary number theory in 1572. Which was considered at the time a pointless excercise in pure mathematics - most of his colleagues took tghe **** out of him.... Imaginary numbers are things like SQRT(-1)

Maths I learnt at school I learnt more life skills than anything failed year 10 then left

mmmm, must up the governor setting

Originally Posted by isuzurover

Btw - as a sparky you should know that AC power wouldn't have been possible without Rafael Bombelli defining imaginary number theory in 1572. Which was considered at the time a pointless excercise in pure mathematics - most of his colleagues took tghe **** out of him.... Imaginary numbers are things like SQRT(-1)

If he'd called it something other than "imaginary" there may have been less urine extraction.

Originally Posted by isuzurover

B92 8NW is correct. Seems like yours is governed at a measly 3000rpm.

To calculate for yourself:
35" x 2.54 / 100 = 0.889m * pi = 2.793 m = circumference of your tyre

140 km/h / 60 =2.333 km/min * 1000 = 2333.3 m/min

2333.3 / 2.793 = 835.5 rpm at the wheel

835.5*3.54*0.996 = 2945 ~ 3000 rpm at the engine.

See that maths you learnt at school was useful for something


Btw - as a sparky you should know that AC power wouldn't have been possible without Rafael Bombelli defining imaginary number theory in 1572. Which was considered at the time a pointless excercise in pure mathematics - most of his colleagues took tghe **** out of him.... Imaginary numbers are things like SQRT(-1)

minor change for clarity