Thread: Turbo Weather?
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Old Nov 17, 2003 | 07:15 AM
  #45  
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JKim
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Originally posted by projsr20det
What I was refering to, was that Vr4, was saying he did not have enough load to spool his turbos in gears 1 and 2.
Heres a chart I snagged.
Gear Ratio \RPM at Transmission Output Shaft
with Engine at 3,000 rpm
1st 2.315:1 \1,295
2nd 1.568:1\ 1,913
3rd 1.195:1\ 2,510
4th 1.000:1 \3,000
5th 0.915:1 \3,278
As you can see with the engine at 3k for the lower gears, due to the gear ratios, the engine is working harder (more load). When you are in the higher gears is when more of the engines power is being transfered straight to the wheels, hence when measuring on a dyno it s best to measure when close or near a 1:1 ratio to get a more accurate reading of true engine power.
I kind of get what you mean about distance traveled.., but the higher you go gear-wise, the less stress on your motor at a given rpm.


ic what u were trying to say. at that specfic rpm...i can see how the load was greater. i was kinda speaking in terms of dynamics and the change of load throughout the whole gear. nevertheless..touche.