Haynes Front Suspension Improvements

[AshG]

well speaking to tilly if i can remember correctly he reckons its the roll centre that is too high causing positive and negative camber changes on tight cornering.

[MarkB]

Originally Posted by AshG

well speaking to tilly if i can remember correctly he reckons its the roll centre that is too high causing positive and negative camber changes on tight cornering.

Goes mad positive in mental mode but it does it both ends Ash that's why it's not so noticeable when you are bumbling along.

[Tilly819]

Originally Posted by MarkB

Goes mad positive in mental mode.

AGREED

I seem to recall quite abit of scrub during suspension travel also IIRC

tilly

[MarkB]

Originally Posted by Tilly819

AGREED

I seem to recall quite abit of scrub during suspension travel also IIRC

tilly

Like I said best I wait for the boffin who knows the right words as I have my own words for stuff and will only confuse folk...but yeah you will be running off the rims when you push the car hard.

[mark]

I'm aware that the front geometry is probably not perfect but it also sounds like some under-steer being provoked by your new big power and the extra weight

Teesside autodrome track has some very tight corners and my car did have the front outer wheel screeching as you describe when really pushing on, a few trial and error damper adjustments made the world of difference

I found once i had dialled out the front wheel screech that the lack of an lsd was more of an issue anyway in hairpin type corners

An lsd is next on my "want to do list" and probably a stronger upgraded type 9

I think its incredibly difficult to set these cars up to a certain spec and then be happy with them, there is so many variables from car to car and every corner you drive around, i know you can set the fundamental things within a reasonable margin but nothing beats driving round a track like your hair is on fire then making some adjustments and doing it again

[AshG]

its only 30kg heavier than it was with the pinto it didnt even make a difference to the ride height and the fact that tillys bike engined one does it too shows its not a weight issue.

really need to model it properly to work it all out been tinkering in solid works but it takes me ages to draw things as i don't use it all the time.

also there isnt any harm in redesigning the wishbones and makeing a new upright to see if it can be improved, nothing ventured nothing gained and all that.

[les g]

Ash
please dont post a joke now
or you will end up banned
you know the rules
post jokes and be critical about the roadster and its.....
off to the naughty step for you......
lol
cheers les g
ps . i think your problem has been highlighted on here before

[minicountryman1961]

Originally Posted by AshG

its only 30kg heavier than it was with the pinto it didnt even make a difference to the ride height and the fact that tillys bike engined one does it too shows its not a weight issue.

really need to model it properly to work it all out been tinkering in solid works but it takes me ages to draw things as i don't use it all the time.

also there isnt any harm in redesigning the wishbones and makeing a new upright to see if it can be improved, nothing ventured nothing gained and all that.

Have any here added a front and/or rear sway bar (anti-roll bar)? If so, what has been the effect on handling?

[Tilly819]

hi all

almost ash, i did a bit of anylisis on the suspension on the roadster a few months back i will have to dig out my results when i get home, IIRC it was more to do with roll center movement and this had some effects that i cannot remember without my results, i do seem to remember that the camber curve was not too great and the outher wheel does like to push out to positve camber under heavy load i did remidie this on mine by running a large amount of statc negative camber but found not suprisingly that i was locking up the front wheels under heavy braking.

Il did out my results when i get home and maybe post a CAD drawing if i still have them.

Tilly