Tire pressure on cambered wheels

[Cobrafan05]

I think we've gotten off track, what I was looking for was someone who had a rear wheel drive car pushing a modest amount of bhp, and find out what they ran on theirs. I'm looking "across the pond" trying to avoid the usual "back in '93 I had a..." stories and the "you need to take the IRS off and put on a live axle" lines I've heard recently. Not that they are unappreciated... But I wasn't looking for nonsense charts and formulas, I can find those quite fine from where I'm sitting.lol where I live most of what I encounter is people who either don't know what a camber plate is, or those who own ricers whose wheels sit sideways for some reason. These last couple days were entertaining though to say the least. I did appreciate the honest answers received. Now if we can wrap this up, I'd like to hear from a couple more of the forum trolls, that was about the best part.

[SlimJim16v]

Comes on looking for free advice - yes
Gets his own specs wrong - yes
Posts in the wrong sub-forum - yes
Moans about the advice he does get - yes
Complains about Trolling - yes

Hmmm!

[Toltec]

I'm no expert on suspension and what I know is more related to lighter cars so bearing that in mind...

You might be better looking at your toe settings to get better turn in and softening the front anti roll bar (sway bar?) should give you more front end grip. I take it you are trying to get a heavy car around some tight corners and are getting understeer on turn in? Do you trail any brake past turn?

[HustleRussell]

0.2 and 0.7 degrees neg is pretty much stock geometry. Run stock pressures. Adjust a few PSI up or down by trial and error and depending on tyre wear.

[Cobrafan05]

Toltec said:

I'm no expert on suspension and what I know is more related to lighter cars so bearing that in mind...

You might be better looking at your toe settings to get better turn in and softening the front anti roll bar (sway bar?) should give you more front end grip. I take it you are trying to get a heavy car around some tight corners and are getting understeer on turn in? Do you trail any brake past turn?

I'm usually trying to get the braking out if the way before the turn so I can swing the back out, need more stability on the front so the back doesn't jerk it out on the apex of it's swing

[Cobrafan05]

SlimJim16v said:

Comes on looking for free advice - yes
Gets his own specs wrong - yes
Posts in the wrong sub-forum - yes
Moans about the advice he does get - yes
Complains about Trolling - yes

Hmmm!

I don't think that's all,I feel I've missed one along the way.it can't be where I lose my temper and go on a rage and such,I always save that for last. Quick I need someone to tell me how much better their car is than mine so we can get into an argument! Bring it lol

[AW111]

Cobrafan05 said:

I don't think that's all,I feel I've missed one along the way.it can't be where I lose my temper and go on a rage and such,I always save that for last. Quick I need someone to tell me how much better their car is than mine so we can get into an argument! Bring it lol

You do know that a Golf xyz* is faster, handles better, looks nicer, is more practical, and much more prestigeous than your tarted up pony car.....

Did that do the trick?

• No car of mine. The last VW I had was air cooled, rear engined, and caught fire spectacularly while driving down the highway!

[Cobrafan05]

Awesome, this is what I was looking for

[Toltec]

Cobrafan05 said:

I'm usually trying to get the braking out if the way before the turn so I can swing the back out, need more stability on the front so the back doesn't jerk it out on the apex of it's swing

How are you swinging the back out on the way into the corner?

In a car that needs it I'll use some braking through the turn in to promote oversteer. You can transition to the gas at the apex then allow the car to straighten up at it drifts out to the exit line.

[Cobrafan05]

All I have to do to break traction is goose the throttle, no brakeing needed, with no straight areas of road for the most part, it's immediate transition from turn to turn. The goal is for the tires to stay spinning the whole time and just sling the back around the other direction. I'm probably not getting over about 40kph, straight up and down the mountain, lots of switch backs where your looking over your shoulder to see the road ahead

[Red Devil]

Cobrafan05 said:

TooMany2cvs said:

He's a Leftpondian. I think the plate on the barge says South Carolina. Which, having been there, would explain quite a lot.

Close, North Carolina, we usually head up to the Blue Ridge parkway in the Boone area. Search Lynn Ridge viaduct. Beautiful scenery, steep drops, no guardrails. It's as back woods as you can get. Good roads once the snow melts. If you don't go home feeling shaky, you haven't had fun.

robinessex said:

Cobrafan05 said:

I like to go on our weekend mountain runs that are full of switch backs and poorly banked turns, I'm looking for it to dig in a little more.[url]

Do I read it that you intend some 'enthusiatic' driving on the public highway ?.

I doubt it on the Blue Ridge Parkway. AIUI, the max speed is a paltry 45mph: less in some places.
Did a search for Lynn Ridge viaduct and it came up as Linn Cove - http://www.blueridgeparkway.org/v.php?pg=873
A drive across it - https://www.youtube.com/watch?v=WsnNcMNnyoQ

[kambites]

Cobrafan05 said:

What would be an upper range of camber before I start to lose cornering performance?

Unfortunately there's no correct answer - it depends entirely on the car's suspension setup because the way camber changes with suspension compression and the amount suspension compresses under cornering loads varies enormously from car to car.

Personally I'd never run more than about 2-3 degrees on a road car simply because of the effect it has on braking performance. IMO if you want a car to drive nicely, the best thing to do is to tune the front camber to your preferred trade-off between cornering grip, braking grip and steering feel, then adjust the rear to give a neutral cornering balance.

I'm currently running about 1 degree on the front and 2 on the rear, I think. Can't remember the exact numbers.

Edited by kambites on Thursday 11th February 14:19

[TooMany2cvs]

Cobrafan05 said:

All I have to do to break traction is goose the throttle
it's immediate transition from turn to turn. The goal is for the tires to stay spinning the whole time and just sling the back around the other direction. I'm probably not getting over about 40kph

40kph? 25mph?
Sorry, this sheep of hit has so little grip that it's going everywhere at the sorts of speeds people can run at, the sorts of speeds even I can ride a bloody bicycle at?

Jesus, no wonder you want advice on making the damn thing handle.

Did you misunderstand when they were talking about "castor", and rob a shopping trolley?

[Cobrafan05]

Red Devil said:

I doubt it on the Blue Ridge Parkway. AIUI, the max speed is a paltry 45mph: less in some places.
Did a search for Lynn Ridge viaduct and it came up as Linn Cove - http://www.blueridgeparkway.org/v.php?pg=873
A drive across it - https://www.youtube.com/watch?v=WsnNcMNnyoQ

That's the general area, though I don't think we've ever paid much attention to the speed limits.I lived up there for a while, the cops may ride out through the back roads a couple times a year unless someone calls for them. I don't think you understand exactly how isolated the area is.

[J4CKO]

Cobrafan05 said:

If you don't go home feeling shaky, you haven't had fun.

Thats Diabetes for you

[Cobrafan05]

TooMany2cvs said:

40kph? 25mph?
Sorry, this sheep of hit has so little grip that it's going everywhere at the sorts of speeds people can run at, the sorts of speeds even I can ride a bloody bicycle at?

Jesus, no wonder you want advice on making the damn thing handle.

Did you misunderstand when they were talking about "castor", and rob a shopping trolley?

I guess you didn't pick up on the fact that we go drifting. We usually take an extra set of tires to throw on for the trip home. I was looking for possibly some pointers on a different setup than the one I ran before I returned it to oem, but I'm beginning to suspect that some of you have never owned a car much less one that could make 400 hp. What do you drive? A fiat? Lol wait let me guess... A Honda lmfao. I'm starting to feel sorry for ya. I'm starting to run into problems like not being able to add any more hp till I get some 315's in the back. The guy down the road from me has a, I think it's a 2012, super snake that makes 960 at the wheels with about 20 ipb of boost. Now while I'm not trying for all that with my aluminum block,I hope to put down about 550 come summertime. Now let's hear from someone with a real car... I'm waiting

[Cobrafan05]

J4CKO said:

Thats Diabetes for you

If all you eat is Honda's you would have to loosen your belt too (-_-)

Edited by Cobrafan05 on Thursday 11th February 15:30

[TooMany2cvs]

Cobrafan05 said:

I guess you didn't pick up on the fact that we go drifting.

At 25mph? Well, it explains why a total lack of grip might be a good thing.

Cobrafan05 said:

What do you drive? A fiat? Lol wait let me guess... A Honda lmfao.

<chuckle> You're not terribly bright, are you? Still, I s'pose you inherit your intellect from Uncle-Cousin-Daddy Bubba.

Cobrafan05 said:

I'm starting to feel sorry for ya.

Don't worry. I won't be permanently scarred by having to stoop so low.

Cobrafan05 said:

Now while I'm not trying for all that with my aluminum block

Good grief. How unutterably high-tech. I think I may swoon.

Cobrafan05 said:

Now let's hear from someone with a real car... I'm waiting

If it's any help, I do also own something ridiculously thirsty (yet laughably slow) with leaf springs, a live axle and a cast iron block, just so you don't feel too much out of your depth.

[Cobrafan05]

I showed this thread to some guys at work, they thought you all were cute, he said show them my new toy. this thing does wheel stands somehow. Lol

[TooMany2cvs]

Cobrafan05 said:

I showed this thread to some guys at work, they thought you all were cute, he said show them my new toy. this thing does wheel stands somehow. Lol

Over this side of the pond, the equivalent aspirational transport for somebody in your line of work would be...


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