How stiff do you like it?

Post by **Stuart** » Sun Jul 01, 2007 12:28 am

Ta :thumb: ( Welcome back )

323ian · Post by **323ian** » Sun Jul 01, 2007 8:45 pm

I have just up rated the roll bars on my Skyline.
How does it make the car handle much differently then? Does it cause more oversteer/understeer?
Sorry to hi jack thread Stu but could be helpfull for you!?

duncan · Post by **duncan** » Sun Jul 01, 2007 8:54 pm

rear anti roll bar reduces rear grip - > more oversteer/less understeer
front anti roll bar reduces weight transferance across the front axle and will cause understeer

You need to be very careful in changing stuff based on limited knowledge IMO - hence why I havent.

http://www.whiteline.com.au has looooads of info

323ian · Post by **323ian** » Sun Jul 01, 2007 9:07 pm

In my book if its uprated its better!!

I ask as now i have uprated the bars the rear seems even more tail happy.
From what you have said there though Dunc if you replace the front and rear bars they should work with each other and just reduce body roll?

duncan · Post by **duncan** » Sun Jul 01, 2007 9:18 pm

still doesnt always mean grip though Ian otherwise they wouldnt bother with suspension in circuit racers.

slaphead · Post by **slaphead** » Sun Jul 01, 2007 9:23 pm

Just a quickie Stu - what size and profile are the tyres on the the dagenham destroyer - there is method to my madness here.

~Mark

323ian · Post by **323ian** » Sun Jul 01, 2007 9:26 pm

But the way i have seen it is that those race cars are rock solid on the suspension and body roll and they grip like shit.
I mean you dont see race cars with loads of body roll?

Good discussion this.

sdminus · Post by **sdminus** » Sun Jul 01, 2007 9:43 pm

I think you need to understand fully what it is doing. this will be of more help in the long run. You cant just dial some toe and add neg camber and expect it to work in all situations. Tracks are living things and require constant setup alterations to keep the car handling correctly.
could your problem be related to rear grip ie too much making the car push in the turns or creating too much side bite from the front end. this is just an example of my earlier point. If the case is like i have said (which it may not becasue i have not seen the car) maybe you need to look at the COG as well as your tire pressure as well.

the fastest cars are not always the ones with the most grip. it is the one with the best balance the bare minimum of grip that is the fastest
Scott

323ian · Post by **323ian** » Sun Jul 01, 2007 9:49 pm

Whats COG?

I have never been 100% happy with the way my car feels while going round a long corner at quite high speed, it feels like there is a bit too much oversteer trying to happen, Corum at Snetterton is a good example.

I am running parallel toe front and rear. I may toe in the rear a bit in future to stop this happening hopefully.

sdminus · Post by **sdminus** » Sun Jul 01, 2007 9:53 pm

323ian wrote:Whats COG?

I have never been 100% happy with the way my car feels while going round a long corner at quite high speed, it feels like there is a bit too much oversteer trying to happen, Corum at Snetterton is a good example.

I am running parallel toe front and rear. I may toe in the rear a bit in future to stop this happening hopefully.

corum is the fast turn i think ?

if so could you not look at it like this.

rear end is coming out !!!! this can only be a few things one of those too much rear grip causing the rear to grip at push round a touch. If you are exceeding about 5 deg of slip angle i would suggest altering tire pressures front and rear by 2-3 psi at a time. You may need to un balance them.