Will be running f/blade engine, got no idea what ratio to run, can anyone point me in the right direction.
I assume you mean for your diff?
I've got a 3.62, but no idea how it goes yet
I don't know the fireblade well my self but people on here do. They'll want to know which size or year of engine plus what tyre size
you're going to use.
I'd guess that a 3.38 would be ideal but a 3.62 would do. Are you mainly using it on the track or the road?
I am starting of with a 893 1995 engine on to a chain diff, running 16/65/195s. Trying to build as light as possible.
Sierra 3.62 is perfect. Most replace the sprocket with a flange and attach a modified Sierra propshaft. How you are going to do it with a chain drive I am not sure.
With 205/60/13 you'll be happiest with a 3:36, or at least I was. Mainly used on a track, but nonetheless, it was awesomely good on the road.
Tried the 3.2 Freeloader with the engine, but way too much for the torque curve to handle.
Building rear bike engine car, engine front facing with chain diff similar to a atom
893 blade, 13" wheels and 3.62 diff for me.
It will pull 12,500 rpm in top, 13,000 going down a hill so perfect for power although a bit noisy at 70mph.
I recon its touching around 125mph flat out.
Regards Mark
quote:
Originally posted by madteg
I am starting of with a 893 1995 engine on to a chain diff, running 16/65/195s. Trying to build as light as possible.
Thanks all.
quote:
Originally posted by mark chandler
893 blade, 13" wheels and 3.62 diff for me.
It will pull 12,500 rpm in top, 13,000 going down a hill so perfect for power although a bit noisy at 70mph.
I recon its touching around 125mph flat out.
Regards Mark
Chris, Thanks for the excel spreadsheet, but how should I use it?
I've got an 893 Fireblade with 195/50R15 and was at Brands and spent the whole of the straight on the rev limiter (11750) with a max speed of
107.
What diff do you think I have? I've checked the number against the sticky on the transmission forum but can't match the number (mine looks
like 83BG 4033BA)
Thanks for your help
Id say you've got at least a 3.9 in there, if not a 4.1.
With the spreadsheet, you can if you want type in alternate diff ratios into the "Data" tab, and you can also edit the tyre sizes in that
tab and it will calculate it all properly. Once youve done that, go to the Speed Chart tab, select the engine, tyres and diff ratio and it will give
your top speeds in each gear on the chart (hover over the chart for the actual figures).
Chris
Thanks, I will have a look. Do you have any data how the 0-60 changes with different diffs?
Nope but its not a lot. A low diff will mean you'll need 3rd gear at least to hit 60 so the little you gain in acceleration you lose between
gears.
I had a 3.5 and a 3.9 in my blade BEC, and side by side against my mate's Megablade there was naff all in it with either diff. The 3.9
feels faster because the revs are rising faster and you're changing gear more often, but actually it makes little difference.