Castle combe yesterday
Turbo Mini Forums

took the mini round combe yesterday for its first real track outing, great fun but encountered a few things that need sorting.. arch was rubbing quite a bit and made a nice groove in the tyre! and the oil temp went up to 120 deg c, so an oil cooler is needed.

oh and its way too scary putting your foot down, even on the straights its all over the place! was so much of a handfull were considering selling up and getting a new track project, non mini.

heres the vids, one is taken with a small camera taped to the front.

Edited by Monkeh on 12th Sep, 2010.

Tyre rubbing and oil cooler are teething problems and easy to sort.

As for it weaving about that is down to setup, toe out at the back can make them bloody horrible, as can not enough caster at the front.

also look at the corner weights,

I may try a rear ARB to help with the weaving

What camera are you using taped to the front - nice clear pictures

looks like a very quick mini mate!

what spec is it if you dont mind me asking?

cheers
josh

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

as Tom said , rear toe in, a little bit of front caster, for steering control.
On mine a little bit of toe in at the front helped a lot the control on power, without I oftently needed to lift the throttle pedal to be back on control. This didn't affect that much if any the cornering capacity

Looks to me like its the front that needs stability, start there first.

If you do put an oil cooler on ,unles its just for track use id put a stat in aswell as it might not get warm enough on the road.

Good vid though.

Rick

Edited by cossierick on 13th Sep, 2010.

thanks for the advice.

at the 5:00 min mark you can see the car was very twitchy around that slight bend and the back end stepped out a tad. i dont get why its so bad, the geometry and corner weights have just been set up.

Front tow - parallel
camber - 1 degree
castor - 5 degrees
Rear tow - 1mm tow in
camber - half degree
rear ARB fitted too.

could the ATB diff be making matters worse? i thought it felt good on the corners but was a nightmare on boost

Edited by Monkeh on 13th Sep, 2010.

What off-set wheels do you have?

The ARB will have some bearing on the pulling. As you'll have such a surge of torque, some midrange boost control might help.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

mid range boost control - isn't that you right foot?

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

im running early type 10" mambas, not sure what offset they are. ive got a pair of cooper s reverse rims which are slightly less offset, might be worth trying them on the front?

carl, i was under the impression that tow out on the front would reduce stabillity?

just had a look at the DON going around castle combe, doesnt seem to do what mine does. what diff is in it?

Edited by Monkeh on 13th Sep, 2010.

I don't have a rear arb, but since I 'm using the quaife diff, I had to reduce my toe out a bit,then increased castor to 5° then tried a bit of toe in, did lessen damps on the rear in the same time .
it defo increased my steering control thru bend and on boost a lot less snaky.

Yep its wants to be toe in for more stability front and rear, toe out on the front will make it turn in better but less stable in a straight line.

rick

Toe in at the rear sounds strange if you want to go fast around a track. What you're experiencing is down to the front end.

Fit a plate LSD.

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM