Which set up is more aggressive?
 

'Agressive' is purely a relative term. Set-up 1, or 2, or they are so close to being the same, there is no real diff?

Set-up 1

L front R front
Camber -1.4 -1.6
Caster 6.5 6.2

L rear R rear
Toe .07 .08
Camber -1.5 -1.5
-------------------------------------------------------------
Set-up 2

L front R front
Camber -1.4 -1.45
Caster 5.98 5.82

L rear R rear
Toe .10 .08
Camber -1.6 -1.74

"Anyone? Anyone? Anyone?" "Bueller. Bueller. Bueller." ka-bump!

Rick:

FWIW,....

Setup 1 will have a tad more oversteer

Setup 2 will have a tad more understeer.

Both setups look optimized for tracks with predominately left turns.

Your final alignment settings will depend on what tires you use, how use the car, and how much range of adjustment you can get at your ride height.

Hope this helps, Sir.

Yep, I agree with steve. ;)

what rim width and tire size are we dealing with here?

What track and what HP motor? Tires?

Ferris....we need more info

Track is Pacific Raceways but would like to do PIR.
Tire size 205 /55/15
Motor is modified RS Spec 2.7 - 220hp at flywheel

What tires?

I wonder if *anyone* here is good enough to notice and evaluate a blind-folded side by side test...( not *really* blindfolded...you know what I mean). I'd say you'd be hard pressed to know the difference, especially if you don't have solid pivot points ( heim -joints) on your car.

Wil

Wil:

IMHO, VERY few people will be able to discern any difference in handling between those two alignment setups. :)

Tires and tire pressures make a far far bigger difference,.....

Exactly. I am attempting to come up with a setting for him based upon:

Tires & size
Actual use - track/street etc
HP

As Steve said to me a few years back:
"What Is Your Mission?"

Hey Bob, post a pic of your car. I'm sure I've seen it -

I prefer:

-3.0 rear, -2.2 to -2.6 up front.
Slight toe in in the rear, slight toe out in front.

On the basis of RsBob's opening remarks.... he's only asking if there is a difference between these two settings...and he's (seemingly) not asking what OTHER set ups may be "better" ( whatever that means..depends on the "goal").

On that basis..I continue to say they're "equal" for all intents and purposes.

Wil

to follow :
may you tell me a good setup for my upcomming project

72' 2.4S with 2.7RS engine
front 7*15 with 195/65 tires
rear 8*15 with 215/60 tires

both road and track

thanks !
Philippe

Wil -

You are correct. I took it a step futher and gave an un-aksed-for recommendation -

Craig:

That's perfectly OK.... maybe people ( newer people) here may not understand your decisive track bias..... :) :) :)

Wil

Amen.
And until Bob pipes up with the answers to some questions, we won't know his mission. Track... street.....which tires?

There are some basic alignment tenets. Two are...

• Always trade camber for caster.
• More rear toe allows you to get on the throttle sooner. (Limited by the HP, or throttle, you have.)

Therefore, "alignment two" is more aggressive.

But it's only nominally more aggressive. So little, I don't think it's of consequence other than supplying a touch more tire life at the track. Personally, I'd try to get -2 degrees camber, with a bit more in the rear, and keep the rear toe-in at .10. I'd also set the front to at least zero toe, and use toe-out for short track, and auto-x use.

What I am primarily shooting for is probably what a lotl of us want, an agressive set-up for the street (read: the twisties) with some limited track time. Actually a car for each pursuit would be ideal.

Set up 2 had Dunlop Sport D40s

Set up 1 has SO3s

As background - Setup 2 also had Recaro SRDs. Very grippy seats. (All corduroy)

Set up 1 now has early RS Style replicas - Nurburgring from GTS (leather with cord inserts).

This is the situation: With the SRDs, the Dunlops, and setup 2, the car felt much more planted - but I am betting it was the seats really holding me 'in'.

The Nurburgrings, the SO3s (1000 miles), and Set up 1 make me feel much more tenuous in the corners.

It may be a combination of factors, or just the seats.

Any ideas since the suspension set-ups are so close?

And the pic, as requested:


http://forums.pelicanparts.com/uploa...1135317683.jpg http://forums.pelicanparts.com/uploa...1135317721.jpg

Rick, I also have the Nurburgring seats from GTS, but I use Toyo RA-1's on the track. Probably more sticky than the tires you use. I have to chinch my shoulder straps down quite snugly to keep my body for moving around too much while cornering. I feel fairly well planted, but I know that real racing seats will make me more confident in the turns. It looks like you're using 7's front and back. What tire sizes? I run 6's and 7's, with 205/50/15 and 225/45/15 tires. I'll try to remember to look at my alignment specs tonight and post if they're much different than yours.