Construction Zone
Don\
Welcome! Log In Register

Advanced

Toe settings for FWD rally?

Posted by SeanP 
derek
Derek Bottles
Professional Moderator
Location: Lopez Island/ Seattle WA
Join Date: 12/20/2005
Age: Possibly Wise
Posts: 853

Rally Car:
Past: 323, RX2, GTI. Next up M3 ?



Re: Toe settings for FWD rally?
August 30, 2011 06:25PM
Only slow drivers (or fast drivers driving slow) need toe out to get FWD cars to turn in.

The faster you drive FWD the better it handles. Nat T Stow and I discussed this at length once after a day where he and I had an epic battle for fastest 2wd driver.

As we kept upping the speed we found the cars got easier to drive when we tried harder, we pushed very hard as we were so close.



Edited 1 time(s). Last edit at 08/30/2011 11:04PM by derek.
Please Login or Register to post a reply
Cosworth
Paulinho Ferreira
Super Moderator
Location: Charlotte, NC
Join Date: 03/15/2007
Age: Midlife Crisis
Posts: 721

Rally Car:
Honda Civic



Re: Toe settings for FWD rally?
September 06, 2011 04:03PM
This info is from the Citroen Racing C2R2Max setup book.

Good Gravel: Toe 0mm front / 5mm IN total rear Camber 1°40' front / 1°30' rear
Bad Gravel: Toe 0mm front / 5mm IN total rear Camber 1°40' front / 1°30' rear
Tarmac Smooth: Toe 0mm front / 5mm IN total rear - Camber 2°50' front / 1°50' rear
Please Login or Register to post a reply
Aaron Luptak
Aaron Luptak
Professional Moderator
Location: SLC
Join Date: 02/15/2008
Age: Midlife Crisis
Posts: 776

Rally Car:
Civic...



Re: Toe settings for FWD rally?
September 06, 2011 04:23PM
Quote
Cosworth
This info is from the Citroen Racing C2R2Max setup book.

I'll bet they know even less than those cavemen at Ford...
Please Login or Register to post a reply
john vanlandingham
John Vanlandingham
Professional Moderator
Location: Ford Asylum, Sleezattle, WA
Join Date: 12/20/2005
Age: Fossilized
Posts: 14,152

Rally Car:
Saab 96 V4



Re: Toe settings for FWD rally?
September 06, 2011 07:49PM
Quote
Aaron Luptak
Quote
Cosworth
This info is from the Citroen Racing C2R2Max setup book.

I'll bet they know even less than those cavemen at Ford...

Savages all!



John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.
Please Login or Register to post a reply
Cosworth
Paulinho Ferreira
Super Moderator
Location: Charlotte, NC
Join Date: 03/15/2007
Age: Midlife Crisis
Posts: 721

Rally Car:
Honda Civic



Re: Toe settings for FWD rally?
September 07, 2011 07:33AM
Quote
Aaron Luptak
I'll bet they know even less than those cavemen at Ford...
This is just to confirm that monkey see monkey do, doesnt really always work. So copying what the old Ford papers say might work for some cars but it might be totally wrong for others. Chassis change and tires even more. On these same setup sheets, in one of the setups had different settings for the Michelin and Pirelli tires.

I was actually surprised at how much toe in the C2's require. But I'm sure they found out that to be the fastest and most stable setup.
Please Login or Register to post a reply
wildert
Brian Klausen
Senior Moderator
Location: Denmark
Join Date: 03/21/2006
Age: Midlife Crisis
Posts: 388

Rally Car:
VW Golf GTi 16V


Re: Toe settings for FWD rally?
September 07, 2011 07:58AM
Quote
Cosworth
Quote
Aaron Luptak
I'll bet they know even less than those cavemen at Ford...
This is just to confirm that monkey see monkey do, doesnt really always work. So copying what the old Ford papers say might work for some cars but it might be totally wrong for others. Chassis change and tires even more. On these same setup sheets, in one of the setups had different settings for the Michelin and Pirelli tires.

I was actually surprised at how much toe in the C2's require. But I'm sure they found out that to be the fastest and most stable setup.

A C2 is about 2 inches long - so adding stability must be top priority smiling smiley.

I run a tad toe in on my Golf Mk 2 as well - it has ended up with toe out on occasion after smacking into odd things - and while it rotates very well, it is also well scary at higher speeds (70ish mph and above). And as Derek says, it rotates just fine with toe in as long as it's DRIVEN.
It didn't previously - but removing the lame front ARB, after fitting the Quaife ATB diff, has proved it to be more than willing to rotate.

Conclusion: you need to go fast to make the car rotate (and to win) - to want to go fast you want stability - to get stability you want toe in. So in the in end: to make the car rotate (and win) you need toe in...

(maybe slightly simplistic, but never the less... I know I'm much faster with toe in than out...)



Brgrds
Brian





Edited 1 time(s). Last edit at 09/07/2011 08:02AM by wildert.
Please Login or Register to post a reply
john vanlandingham
John Vanlandingham
Professional Moderator
Location: Ford Asylum, Sleezattle, WA
Join Date: 12/20/2005
Age: Fossilized
Posts: 14,152

Rally Car:
Saab 96 V4



Re: Toe settings for FWD rally?
September 07, 2011 09:41AM
Quote
wildert
Quote
Cosworth
Quote
Aaron Luptak
I'll bet they know even less than those cavemen at Ford...
This is just to confirm that monkey see monkey do, doesnt really always work. So copying what the old Ford papers say might work for some cars but it might be totally wrong for others. Chassis change and tires even more. On these same setup sheets, in one of the setups had different settings for the Michelin and Pirelli tires.

I was actually surprised at how much toe in the C2's require. But I'm sure they found out that to be the fastest and most stable setup.

A C2 is about 2 inches long - so adding stability must be top priority smiling smiley.

I run a tad toe in on my Golf Mk 2 as well - it has ended up with toe out on occasion after smacking into odd things - and while it rotates very well, it is also well scary at higher speeds (70ish mph and above). And as Derek says, it rotates just fine with toe in as long as it's DRIVEN.
It didn't previously - but removing the lame front ARB, after fitting the Quaife ATB diff, has proved it to be more than willing to rotate.

Conclusion: you need to go fast to make the car rotate (and to win) - to want to go fast you want stability - to get stability you want toe in. So in the in end: to make the car rotate (and win) you need toe in...

(maybe slightly simplistic, but never the less... I know I'm much faster with toe in than out...)

Tack, drengen...



John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.
Please Login or Register to post a reply
A1337STI
Alex Rademacher
Mod Moderator
Location: Reno,nv
Join Date: 09/10/2007
Age: Midlife Crisis
Posts: 686

Rally Car:
93 GC with an 01 RS swap!


Re: Toe settings for FWD rally?
September 07, 2011 12:56PM
I noticed when i first started rallying, i needed help getting the car to rotate. Now i just want it more stable.

I think if you want to develop yourself as a driver, its great to get experience with different setups. drive one rally with your car setup to over steer (hopefully one with out very very high speeds) , and one setup to under steer . both experiences can improve you as a driver. focus on driving what you have, to the best of your ability, rather than tuning the car to fit your style of driving.

I tried seed 9 with a rear sway bar last year. car was very loose, and it was slowing me down. driving through the corners if i hit a bump the car would start to drift, but i couldn't really predict it so i ended up driving tidy and under the limit for sure. i disconnected the rear sway bar at the mid server and the car tightened up a lot, enough to have steady state under steer, the result? i ended up driving a lot more sideways through the corners, because the car became predictable and easier to handle (for me) smiling smiley
Please Login or Register to post a reply
NoCoast
Grant Hughes
Elite Moderator
Location: Whitefish, MT
Join Date: 01/11/2006
Age: Midlife Crisis
Posts: 6,818

Rally Car:
BMW



Re: Toe settings for FWD rally?
September 07, 2011 01:14PM
Quote
A1337STI
I tried seed 9 with a rear sway bar last year. car was very loose, and it was slowing me down. driving through the corners if i hit a bump the car would start to drift, but i couldn't really predict it so i ended up driving tidy and under the limit for sure. i disconnected the rear sway bar at the mid server and the car tightened up a lot, enough to have steady state under steer, the result? i ended up driving a lot more sideways through the corners, because the car became predictable and easier to handle (for me) smiling smiley

Through all four corners?
Please Login or Register to post a reply
A1337STI
Alex Rademacher
Mod Moderator
Location: Reno,nv
Join Date: 09/10/2007
Age: Midlife Crisis
Posts: 686

Rally Car:
93 GC with an 01 RS swap!


Re: Toe settings for FWD rally?
September 07, 2011 01:24PM
I think the roads have changed since you drove it last. the stages now have 6, and 8 corners respectively ... :p
Please Login or Register to post a reply
NoCoast
Grant Hughes
Elite Moderator
Location: Whitefish, MT
Join Date: 01/11/2006
Age: Midlife Crisis
Posts: 6,818

Rally Car:
BMW



Re: Toe settings for FWD rally?
September 07, 2011 04:33PM
I never even drove it. I looked at stage maps and withdrew. smiling smiley
Please Login or Register to post a reply
BobOfTheFuture
Rob
Senior Moderator
Location: LI, NY
Join Date: 09/25/2010
Age: Midlife Crisis
Posts: 629

Rally Car:
None, anymore.



Re: Toe settings for FWD rally?
September 08, 2011 02:25AM
Quote
SeanP
I am gettiing some alignment done before the next event. Car is FWD Neon with a welded diff. I am planning on running zero toe in the rear and a bit of toe-out (.25"-.30"winking smiley in the front. My theory is that a little toe-out will reduce understeer.

Anybody see anything wrong with this?

Just as a quick note-

Toe out= quicker turn in, then earlier tendancy to 'break away' and understeer
Toe in= More sluggish turn in, but less tendancy to understeer and more warning before 'break away' understeer.

a nice turn in feeling is not equal to grip up front

This is from my old Autocross notes, for a FWD car (focus SVT) on the pavement at Nassau coliseum that is nasty, sandy, torn up w/ large cracks. As close to offroad as Autocross gets probably. So take it with a grain of salt...



Edited 1 time(s). Last edit at 09/08/2011 02:27AM by BobOfTheFuture.
Please Login or Register to post a reply
wildert
Brian Klausen
Senior Moderator
Location: Denmark
Join Date: 03/21/2006
Age: Midlife Crisis
Posts: 388

Rally Car:
VW Golf GTi 16V


Re: Toe settings for FWD rally?
September 08, 2011 02:35AM
Quote
BobOfTheFuture
a nice turn in feeling is not equal to grip up front

Oh how true and what an excellent point!

And then add the "oh-crap-it's-all-over-the-place"-feeling you get with toe out at higher speeds, and you got a recipe for something that wont be all that quick.



Brgrds
Brian

Please Login or Register to post a reply
BobOfTheFuture
Rob
Senior Moderator
Location: LI, NY
Join Date: 09/25/2010
Age: Midlife Crisis
Posts: 629

Rally Car:
None, anymore.



Re: Toe settings for FWD rally?
September 08, 2011 05:55AM
Quote
wildert

And then add the "oh-crap-it's-all-over-the-place"-feeling you get with toe out at higher speeds, and you got a recipe for something that wont be all that quick.

Yeah, on the highway, hitting some crowned pavement... eye popping smiley
Please Login or Register to post a reply
wildert
Brian Klausen
Senior Moderator
Location: Denmark
Join Date: 03/21/2006
Age: Midlife Crisis
Posts: 388

Rally Car:
VW Golf GTi 16V


Re: Toe settings for FWD rally?
September 08, 2011 06:38AM
Quote
BobOfTheFuture
Quote
wildert

And then add the "oh-crap-it's-all-over-the-place"-feeling you get with toe out at higher speeds, and you got a recipe for something that wont be all that quick.

Yeah, on the highway, hitting some crowned pavement... eye popping smiley

You don't even - in my experience - need that. Add a bit of power to the car (I have around 170 hp), semi-slicks (Yokohama A048's) and poly or nylon bushes all around - and you feel just about ANYTHING the car does. In my case it was plain scary going through a high speed corner at may around 60-70 mph, and accelerating - and then just letting go of the throttle. Car just felt like it wanted to point in a COMPLETELY opposite direction.... NOT funny in my experience...



Brgrds
Brian

Please Login or Register to post a reply
Sorry, only registered users may post in this forum.

Click here to login