shigawaker
Member
With 9 tooth drivers. (01 SRX)
what are the theoretical top speeds at 8500 RPM with different gear ratio`s?
Eg.
stock (1.65) : XXX MPH
2.0: XXX MPH
1.9: XXX MPH
1.8: XXX MPH
1.7: XXX MPH
Or is there a formula i could use to figure that out???
Any help would be greatly appreciated.
what are the theoretical top speeds at 8500 RPM with different gear ratio`s?
Eg.
stock (1.65) : XXX MPH
2.0: XXX MPH
1.9: XXX MPH
1.8: XXX MPH
1.7: XXX MPH
Or is there a formula i could use to figure that out???
Any help would be greatly appreciated.
Last edited:
Pauljones
New member
It's a little weird to phrase the question like you have. The engine rpm combined with the clutch set-up shift the primary out. After this shift out happens the gearing and driver teeth determine the top speed. At 8500 rpm, the clutches shifted all the way out, 8 tooth drivers; the following gearing will result in the following theoretical top speeds:
23/38(1.652) = 115.5mph
23/39(1.696) = 112.6 mph
23/40(1.74) = 109.8 mph
Your 01 SRX came with 9 tooth drivers. So at 8500 rpm and full clutch shift out the theoretical top speed was:
23/38 (1.652) = 130 mph
Changing to 8 tooth drivers results in a significant lower top speed. Changing the gearing to 24/36 (1.50) = 127.3 mph, or 24/35 (1.45
= 130.91 mph will bring the overall close to stock.
23/38(1.652) = 115.5mph
23/39(1.696) = 112.6 mph
23/40(1.74) = 109.8 mph
Your 01 SRX came with 9 tooth drivers. So at 8500 rpm and full clutch shift out the theoretical top speed was:
23/38 (1.652) = 130 mph
Changing to 8 tooth drivers results in a significant lower top speed. Changing the gearing to 24/36 (1.50) = 127.3 mph, or 24/35 (1.45
= 130.91 mph will bring the overall close to stock.
shigawaker
Member
I agree... re-reading my post i didnt quite explain myself well...
I am set up presently for 660Ft snow racing but the track that i have been going to has been rock hard at every race ive been too so far... i was curious if my current set up of 1.9 could be ``Shifted out`` because I seem to be missing a small bit of top end from the 550 - 660 mark.
My engine RPM doesnt climb like it would on grass but im wondering if the ``slippage`` factor would eliminate this symptom unless i actually got to 100 MPH.
And i do have the stock drivers (9 tooth) im not sure why i wrote 8 lol
So i guess my question is: On a hard 660 Ft snow track is a 1.9 Ratio too short??
I am set up presently for 660Ft snow racing but the track that i have been going to has been rock hard at every race ive been too so far... i was curious if my current set up of 1.9 could be ``Shifted out`` because I seem to be missing a small bit of top end from the 550 - 660 mark.
My engine RPM doesnt climb like it would on grass but im wondering if the ``slippage`` factor would eliminate this symptom unless i actually got to 100 MPH.
And i do have the stock drivers (9 tooth) im not sure why i wrote 8 lol
So i guess my question is: On a hard 660 Ft snow track is a 1.9 Ratio too short??
shigawaker
Member
Edited*
For 660ft snow and hardpack 21/40 worked awesome!
stock drivers
stock drivers
Vmax540
VIP Member
Gear Ratio interesting
http://www.racenssr.com/calc.htm
MPH Calculator
Fill in the appropriate information below, Then click when finished.
Engine RPM
Chain Case Gear ratio
Clutch ratio (1.00 w/o Overdrive)
Driver diameter in inches (7.07, 7.75.) The speed in MPH is miles per hour.
The same DRIVER size and RPM will give the following speeds based on the following gear ratio changes.
1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75
http://www.vintagevmax.com/vvforum3/viewtopic.php?f=2&t=1529
http://www.racenssr.com/calc.htm
MPH Calculator
Fill in the appropriate information below, Then click when finished.
Engine RPM
Chain Case Gear ratio
Clutch ratio (1.00 w/o Overdrive)
Driver diameter in inches (7.07, 7.75.) The speed in MPH is miles per hour.
The same DRIVER size and RPM will give the following speeds based on the following gear ratio changes.
1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75
http://www.vintagevmax.com/vvforum3/viewtopic.php?f=2&t=1529
shigawaker
Member
Thanks guys... I think im going to try going 1.8 and see what it does... Gotta love testing 
jabber800
New member
Rpm x top gear / bottom gear x track pitch (2.52) x driver tooth # / 12 / 5280 x 60 = mph
This is speed at one to one shift out on the clutches.
Hope this helps.
This is speed at one to one shift out on the clutches.
Hope this helps.