89xr2

Chip, do you know the reasons behind the honda engine running the other way round?

doctor stavros

PAUL S

iTrader: (8)

as Jimbo said you would also need to change the gearing in the transfer box if you did not want more power going to the front diff in the layout I mention, but 50/50 splits are available for the MT75.

I doubt a normal 4x4 front diff would be suitable to power the rear wheels but it would be straight forward to use a bigger diff as you would not have the normal restriction of the RHD rack being in the way, or you could put it to the rear of the engine rather than though the sump if you did use this configeration

cossie604

iTrader: (2)

Its hardly maths is it Dojj...just measure the length required and buy it

dojj

iTrader: (3)

the centre diff put a 1/3 2/3 split due to one bit rotating twice as fast as the other which is then reduced again to ge tthe right ratio to get the props front and rear

easy enough to just weld it up to be a solid bit of kit to give you no slip if it's a case of just powering it up

but that still leaves you with a more fwd 4wd car

dojj

iTrader: (3)

lke jimbo, numbers aren't my strong point (unless he's removed 10% due to transmission losses before anyone starts dissing his figures )

J1mbo

iTrader: (1)

afpmsl

sorry i did mean 75

ECU Monitor Enthusiast

iTrader: (1)

Jimbo,

LOL, we both have problems with the same numbers.... "FREE"

J1mbo

iTrader: (1)

dont get me started

bbspolo

i know the diffs doesnt control how much power goes were but dint know you could get 50/50 splits for the mt75?
good point about positioning the front (now the rear diff) in front of the sump instead of though the sump!
id be tempted 2 use 2 jag diffs like that that rod runs, loads of different ratios avabiale, cheep (just weigh a bit more)
only weak point would be the gbox?

steveboyslim

Why not use a pair of drop gears to reverse the direction as they did on the RS200.

Steve

PS Honda said it help with traction having the engine/prop/diff rotate the other direction.

Twellsie

iTrader: (1)

cant the torque split between front and rear be altered by using differant viscosity fluids, or something along those lines?

GARETH T

i personally would plan another way around your problem!

blacky.

why not just turn the final drive 180 deg then there is no need to reverse the motor???????????????????

Fudgey

iTrader: (4)

simon, speak to quaife.

they built a rear engined race car, using a cossie motor and 4x4 running gear in reverse, hell they even still have the car, so just buy it off them lol

dojj

iTrader: (3)

no mate, it's due to one bit spinning twice the speed (the front) so getting half the torque (1/3rd is half of 2/3rd's )

Chip

iTrader: (3)

So that the torque reaction tips the engine the other way, to aid with traction is the usually accepted story you see thrown about, dont know if its true or not though.

foreigneRS

they do say that, and on race bikes too (not just honda)

Rs1

iTrader: (1)

Think its been said but cant you just turn the diffs upside down?

evo200

iTrader: (1)

I looked into doing this with my RS200 rep. Had it all worked out too, but the killer for the project was the fact that to get two narrow bucket seats in the car meant the engine + box needed to be offset to keep the transmission tunnel in the centre of the chassis. That also meant taht the driving position was too offset for the pedals + steering wheel. Either that or have the g/box in the centre of the car and the Transfer box intruding into the passenger side and have no passenger seat!