The Dyno Process
- Andy Pickering
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- Posts: 2172
- Joined: Sun Jan 25, 2009 10:15 pm
- Main scooter: GP
- Location: Hull
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The ones I've been present at have been 3rd
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Ricspeed, gone but never forgotten RIP my friend #59
- paulmgreen
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- Joined: Sun Jan 04, 2009 4:34 pm
- Main scooter: Lambretta Group 4 Race 200
- Location: Grantham
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3rd........... Will the next question be why??? 

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I've used a few dyno's and all used 3rd gear except Simon at B-race
TS1 and PX stay in the garage (future barn finds) out on the GTS 300 when I go out on a scooter.
I know I’ll get there and back
I know I’ll get there and back
The 3 main types of runs we perform are :-
AG ( All gear ) this is usually plotted power,Torque & AFR against time
RO ( Roll on ) usually performed from 2000 rpm (ish ) in 3rd and plotted against rpm
FA ( Fast acceleration ) again 3rd gear from 5000 rpm (ish) again vs rpm
All the above should also be plotted against the AFR ( Air Fuel ratio )
The reason we use 3rd as it's an easier gear to use to show peak power over time 1st & 2nd's two quick and 4th too long so 3rd is a happy medium. When we set up the sprint engines for example the final test is always peak power in all gears to help set up gear changes etc . theres lots of other factors involved such as inertia/acceleration/load/gear ratio's/AFR/correction factors etc etc, hope this brief explanation helps.
Pete
AG ( All gear ) this is usually plotted power,Torque & AFR against time
RO ( Roll on ) usually performed from 2000 rpm (ish ) in 3rd and plotted against rpm
FA ( Fast acceleration ) again 3rd gear from 5000 rpm (ish) again vs rpm
All the above should also be plotted against the AFR ( Air Fuel ratio )
The reason we use 3rd as it's an easier gear to use to show peak power over time 1st & 2nd's two quick and 4th too long so 3rd is a happy medium. When we set up the sprint engines for example the final test is always peak power in all gears to help set up gear changes etc . theres lots of other factors involved such as inertia/acceleration/load/gear ratio's/AFR/correction factors etc etc, hope this brief explanation helps.
Pete
If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.