Paul (Notts)
|
| posted on 13/4/12 at 08:26 AM |
|
|
Chain diff or car diff
Working on the chassis plans at the moment for my Terrapin build. The biggest decision seems to be the cost of a LSD chain diff.
For the same price as the chain diff I recon I could get a BMW lsd diff, shafts ,hubs, discs, brakes.
This would mean extra weight and a longer wheel base. + a small loss of power in the drive system.
My only concern with the chain diff is the shafts. I recon one shaft would end up being very long..
Help…I need to make a decision and stick to it…
Chain diff or prop and car diff.
Paul
I know this has been covered before but I still can make my mind up.......
 
drive system
|
|
|
|
|
minitici
|
| posted on 13/4/12 at 08:33 AM |
|
|
If you look at the bike engined single seaters in any hillclimb paddock you will see that the majority of them have unequal length driveshafts.
Single seaters have such good traction that torque steer tends not to be a problem.
There are a couple of chain drive differentials which allow the sprocket to be fitted outboard of the left side bearing carrier thus moving the
differential central to the chassis.
|
|
|
Paul (Notts)
|
| posted on 13/4/12 at 09:06 AM |
|
|
If I go chain drive do I use ford sierra rear hubs or is their an other option?
Paul
|
|
|
matt_gsxr
|
| posted on 13/4/12 at 09:14 AM |
|
|
According to this book
Fiesta bits work well. Very hands on approach, I'd recommend it.
|
|
|
iank
|
| posted on 13/4/12 at 11:32 AM |
|
|
Have a look here for some useful information.
http://www.westgarage.co.uk/index.html
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
|
|
|
Lightning
|
| posted on 13/4/12 at 11:53 AM |
|
|
or there is these guys. they say they will modify my escort cain diff for RS trubo LSD for £250 . Probably gove it a try
LINK
Steve
|
|
|
russbost
|
| posted on 13/4/12 at 01:15 PM |
|
|
Generally bike engines suffer with far less surge probs if they are the same way round they were in the bike, hence I feel chain diff works better.
You could buy all the BMW bits as you suggest, then just take the LSD out of the casing & modify it for chain drive - we use the standard Toyota
MR 2 diff this way in the Furore & keep standard length driveshafts.
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
MK9R
|
| posted on 13/4/12 at 03:05 PM |
|
|
Less power loss through a chain drive, on a 170hp engine you will see about 7-9hp more at the wheels using a chain compared to a conventional diff
Cheers Austen
RGB car number 9
www.austengreenway.co.uk
www.automatedtechnologygroup.co.uk
www.trackace.co.uk
|
|
|
zilspeed
|
| posted on 13/4/12 at 04:43 PM |
|
|
quote:
Originally posted by minitici
If you look at the bike engined single seaters in any hillclimb paddock you will see that the majority of them have unequal length driveshafts.
Single seaters have such good traction that torque steer tends not to be a problem.
There are a couple of chain drive differentials which allow the sprocket to be fitted outboard of the left side bearing carrier thus moving the
differential central to the chassis.
Douglas
I am informed that a certain Reynard 903 which we are about to see runs a jackshaft and secondary chain.
For equal length driveshaft I presume ?
Also, when Mr Murray's car eventually breaks cover, equal length driveshafts too.
You probably already knew this anyway 
Hope the old bugger stills knows how to pedal.
He's up to his oxsters in filler and body moulds as we speak 
|
|
|
