John McM

I asked the specialist for a track friendly set up. I will do two road trips soon. Is it too aggressive for long distances? It's a 1990 C4.

alexjc4

2 degrees camber front and rear is pretty aggressive for a road car. You will probably get uneven tyre wear if you are doing thousands of mile a year but it'll work nicely on the track I think. Looks like they've given you as much caster as they could which is good.

On a C4 they seem to like a fraction less or even zero front toe to help the turn in/natural understeer.

John McM

Thanks for the quick reply. I'm running it with Hankook 221 track tyres. It's only 80 miles return to the track so this is not normally an issue. However, I've got 600 mile trip for a track tour in a month or so, then a 2,000+ mile four track trip next March. I think I'll run two sets of wheels.

alexjc4

lol 2,000miles in New Zealand, isn't that as far as you can go and then all the way back again

Depends how soft the Hankooks are but tbh I think you'd be OK even with that mileage. Sounds like you're more likely to wear the tyres out on the track days (in the normal way) than on the road.

John McM

Sure is. The antipodean version of your 'Go cars not show cars'. Auckland to Invercargill, return.

Vandit

Since it's a C4, I would have probably dial-out all that toe-in and set it to zero on all 4 corners. That would be more aggressive and also gentler to your tires.

Take corners faster to help even out the wear across the tire, lol

race911

Hi to an Aucklander from an Oaklander.......

That out of the way, suggest you look up David Taylor @ Motorsport Services Ltd. His buddy Gareth, ex-Renault F1 (if I remember correctly) is also there. Both worked here in the Bay Area for a few years.

No idea if they're working on street cars out of that shop, but David cut his teeth in Australia during the 964 Cup heyday so he's got the experience with these cars. Clued me in to a LOT when I was racing my RS America, as I had minimal/misguided conventional wisdom experience with 964s at the time.

If you do look them up, say hi from me, Behram, and the rest of the gang!

ValveFloat

I have put over 5000 miles on a set of street tires with similar alignment, more negative camber in the front though.
The tires are not wearing evenly by any means, but they are not horrible.
For your 2000 mile trip I would recommend traveling on street tires, if its an option.

koenig_roland

My setup is comparable, but less toe frontside. No problems with bad tyre wear....

John McM

Hi Ken, will do. I've bought items from David on the local eBay but haven't yet met him. He's based at my local track so I'm sure I'll see him one day.

holger_964

The setup is completely fine - mine is comparable. It helps against understeering and makes the car much more agile. With 18 inch wheels, it could be even more camber.

John McM

Thanks to everyone who answered. I'm just starting Track driving and going through my setup. At my level all I can do right now is give expected usage and rely on the technician to get it right. Sounds like he has. That boosts my confidence in the car. It's been a rough few months, as noted in my other thread, lessons learned.

sml

-2 neg camber with street driving will make your rear tyres last about 3-4000 miles for about 180 treadwear tyres.

sml

except -2 is the max for a stock car.

holger_964

Did you try it?

I did. With -2 and 17 inch, the tail of the 964 C4 is very active, i.e. that you can set impulses by a quick steering and provoke a slight oversteering.

This effect vanishes with 18 inch wheels. Therefore, I sometimes wish more negative camber, but it makes no sense on public roads, because the tyres will be worn unevenly.