[FONT=Times]Hi 914 Guys
I'm chasing tire pressures due to a recent switch to the Kumho Victor Racers. I'm wondering what sort of tire pressures are being used for Autocross on your 914's. Don't want to know about racing pressures just AutoX. I realise that different shocks, sway bars, torsion bars are going to come into play but I'm looking for "ball park" figures.
I was running cold 35-36 (I think max is 44) on those tires. Now I run cold 28-30 with better results. I think you get better traction with slightly lower pressure.
I've ran as low as 28-26 cold, f to r. Under 30 is a good ball park number. They love negative camber.
-2 at both end if you can swing it.
I run the same tires but I'm way down at 23-26 psi. The surface we run on is slick and of course with a car that weights less than 1,580 pounds, I gotta run then low to make them work.
Paul
I've had the opposite experience. I used to run 30psi cold all around. Now I run closer to 34-35psi and I like it better. Best advise is probably to start somewhere around 30, and then play with them up and down to see what works best for you. Of course, this is for autox where your tires don't have a chance to heat up. On the track, you need to start lower and target a 'hot' pressure.
Demick
'74 2.0
Somebody correct me if I'm wrong, but in AX there's
usually something else to be concerned about
compared to big tracks. Where we are we run a lot
of slaloms, and I think sometimes you can do better
on that kind of course by overinflating a little, to
make the car respond faster, at the expense of a
bit of grip. When you do a bunch of fast maneuvers
I think you want the car to bite quickly.
Also I haven't done a lot of experimenting with the
Kumho pressures, but I run 35 all around, and keep
it there if they heat up (long courses without huge
time between runs).
Mark S.
'70 914-6
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