Suspension tweaking and LSD
flak monkey - 10/12/07 at 08:01 AM
I need to get the suspension on my car tweaked up as it has a tendency to lift the inside wheel when hammering around corners, not much, but enough to
make it spin up. I know this is partially to do with me having an open diff, but I think it could be made better without resorting to the hassle of
changing it (for a start I dont want to have to fit disk brakes at the rear).
Currently i have 350lb springs up front and 175lb at the back. The car weighs about 625kg without a driver and is 55:45 weight distribution with a
driver. If anything the car has a tendency to understeer slightly when pushed hard which indicates too stiff at the front or too soft at the back
IIRC. The reason for the 350lb up front is becuase I have a boat anchor for an engine and the supplied 275llb springs werent man enough 
.
Suggestions for improvements from those in the know please
Plus has anyone fitted a 7" LSD with drum brakes at the rear? If so, how?
Cheers,
David
AdamR - 10/12/07 at 10:14 AM
Sounds like you know what the problem is - your front springs are too stiff.
I have a slightly heavier boat anchor than yours and I was advised (by MNR amongst others) that 275lb springs up front would be fine. I haven't
driven it yet, but based on the highly scientific method of bouncing the rolling chassis up and down in my garage, I think it'll be ok.
nitram38 - 10/12/07 at 10:16 AM
An anti-roll bar is a good fix, if you can fit one.
TGR-ECOSSE - 10/12/07 at 01:33 PM
If possible try and get your car set up on corner weights by someone who knows these cars. We got the stock car set up by an expert and its saves a
lot of guess work. As for the diff and driveshafts i did read on here somewhere that somebody did have hybrid driveshafts ie push in on the hub side
and bolt on at the diff side or could have been the other way round. Just wish i could find the post as other people have asked as well.
Ronnie
Ps Another option to your handling problem is to drive slower round corners
mcerd1 - 10/12/07 at 01:34 PM
quote:
Originally posted by flak monkeyPlus has anyone fitted a 7" LSD with drum brakes at the rear? If so, how?
Its done all the time with quaife ATB's - but I don't think there is a ford LSD that suits the push-in type shafts (someone please tell me
if I'm wrong)
the stub axle bits that the drivshafts fit onto/ into are equal lenghts on open diffs but not on ford LSD's
Is there any special reson that you don't want the rear disc setup ?
flak monkey - 10/12/07 at 01:43 PM
quote:
Originally posted by mcerd1
quote:
Originally posted by flak monkeyPlus has anyone fitted a 7" LSD with drum brakes at the rear? If so, how?
Is there any special reson that you don't want the rear disc setup ?
Because the brake balance is just right now without any need for bias valves and twin master cylinders 
mcerd1 - 10/12/07 at 03:30 PM
I know that iiyama has push-in shafts and rear discs on his rush (with modified disc brake hub carriers)
basically the opposite of what you want 
I don't know what diff he's got though
I suppose you could get driveshafts made with push-in one end and bolt-on the other (but an ATB would probably be cheaper)