Hi all,
I have just joined this forum, seeking advice for my new car. It's a bike engined single seater, originally built as a class 8 autograss car but converted latterly to a car for use on tarmac sprints.
It runs an 1100cc blackbird engine (rear engined).
These have been used in the past for such events as tarmac sprints, relatively succesfully, but they always tend to suffer with understeer.
This I would like to cure. I always raced 911s succesfully, so in my head this should be a similar beast to drive.
Well.......this Sunday I had my second event in the car (on the Isle of Wight), and although we did pretty well, it was struggling massively with front end grip.
So far, since getting the car I have changed the pedal box and steering box setup as this was all very crued, which now allows for better throttle use (very difficult becuase it's a bike enge so very revvy).
I have just put 500lb springs on the rear to attempt to cure it 'squating'. The car is approx 350kg with 180bhp rwd. Running Med compound tyres on the rear and soft on the front.
This video is from the event, which shows a very clear view of what's going on with the front end.
https://www.youtube.com/watch?v=s4Y2r5pAUbg
I would like some advice from you guys in the know as to how best cure the understeer. Currently I'm considering ballasting the front end, but not sure if is the correct route to go.
I'm running -3 degree front camber and 1.5 degree tow out
Any help would be much appreciated.
Will