Raptor 2014
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- Joined
- Sep 5, 2013
- Posts
- 189
- Reaction score
- 151
Questions - Have patients Newbee
It seems as though all dyno graphs are being done in 3rd gear - Which really screws the comparative results as to a standard 1.1 - 4th gear ratio used in testing of most vehicles.
Laymen’s terms – Dyno results show quite a bit higher than an actual (1:0 to1:0) ratio. If you dyno in 1st gear, HP & Torque will be even higher because of the gear ratio multiplication factor.
6R80 transmission ratios are to the best of my knowledge -
3rd – 1:52
4th – 1:14
5th - .86
Rear end ratio 4:1
With an OD tire size of 34.4 inches (315-70-17)
@ 6,000RPM the theoretical speed is – 98 MPH in 3rd –
I think the speed limiter from the factory is set at 110MPH for the BFG Tires on our 2014 trucks - (S) series tire.
In 4th (1:14 ratio) @ 110 MPH = Theoretical 5024 RPM
I currently have 2700miles on my Raptor but stile quite a bit of blow by past the rings so I haven’t dynoed yet.
Question – How do you ROUGHLY convert Dyno torque in 3rd gear (1:52) to an actual (1:0) Torque Ratio?
It seems as though all dyno graphs are being done in 3rd gear - Which really screws the comparative results as to a standard 1.1 - 4th gear ratio used in testing of most vehicles.
Laymen’s terms – Dyno results show quite a bit higher than an actual (1:0 to1:0) ratio. If you dyno in 1st gear, HP & Torque will be even higher because of the gear ratio multiplication factor.
6R80 transmission ratios are to the best of my knowledge -
3rd – 1:52
4th – 1:14
5th - .86
Rear end ratio 4:1
With an OD tire size of 34.4 inches (315-70-17)
@ 6,000RPM the theoretical speed is – 98 MPH in 3rd –
I think the speed limiter from the factory is set at 110MPH for the BFG Tires on our 2014 trucks - (S) series tire.
In 4th (1:14 ratio) @ 110 MPH = Theoretical 5024 RPM
I currently have 2700miles on my Raptor but stile quite a bit of blow by past the rings so I haven’t dynoed yet.
Question – How do you ROUGHLY convert Dyno torque in 3rd gear (1:52) to an actual (1:0) Torque Ratio?