Non "trammeling" setups
Thread Starter
Racer
Joined: Aug 2010
Posts: 472
Likes: 9
From: San Diego CA
Non "tramlining" setups
Just installed new C6 z06 shocks all the way around, lowered 3/4", 275-35-18 RT 615k's up front, Nitto 305-35-18 555R2's, rear.
Little less trammeling with the new shocks. I guess the wider rubber up front, the more pronounced trammeling will be.
Are most of you guys dealing with this or going with a narrower tire/wheel up front?
I guess I could go back to 17's up front with some ps2's.
For those who don't have much trammeling at all, please post your setups. I'm curios.
Little less trammeling with the new shocks. I guess the wider rubber up front, the more pronounced trammeling will be.
Are most of you guys dealing with this or going with a narrower tire/wheel up front?
I guess I could go back to 17's up front with some ps2's.
For those who don't have much trammeling at all, please post your setups. I'm curios.
Last edited by SVT_Z06; Aug 23, 2014 at 05:20 PM.
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
It is just the way it is with wide, low profile tires, and stiff suspensions. Did you get an alignment after lowering? Some companies offer a bump steer kit which may help. My C4 does it more than C5, same width front. When I went from 295 rear to 315 on C4, it increased a good bit. Always have to keep a good grip on wheel if on uneven roads.
Melting Slicks
Joined: Nov 2006
Posts: 2,001
Likes: 42
From: Ventura, California
I don't think the width of the tire is as important as the tire compound itself. I run Sumitomo HTZ 315/35/17 up front and my tramlining is basically non-existent. When I first bought the wheels (2nd hand) they had the same size tires but bald/ hard Kumho Victoracers on them and those tramlined BAD. Make sure that the alignment shop toes the front wheels IN a 1/16" not out. A car that has toe out will feel very darty, giving the impression that it is tramlining.
Melting Slicks
Joined: Aug 2004
Posts: 3,003
Likes: 89
From: Indy IN
Toe out and mushy tires will tramline like crazy. Try bit of toe in in the front for the street and if you track the car you can turn some toe out for the track. I go from 1/8 of an inch of toe in on the street to 1/8 of an inch of toe out on the track. The car does tramline a bit in the toe out position, but it's a nonexistent at the street setting.
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
I have 275/30/19 fronts and my car drives fine. It takes a pretty bad street with large waves across the surface beat into it by the traffic before it pulls. The alignment is similar to the Pfadt street setup. About 0.4* camber all around and a little toe in. Equal side to side except for a little extra caster in the right front.
Melting Slicks
Joined: Nov 2006
Posts: 2,001
Likes: 42
From: Ventura, California
How many miles on the car? What kinda shape are your tie rod ends in? I drove my car for a week or so after the alignment shop pointed out that I had a bad rear tie rod. The car was all over the road. Tramlining can feel similar to bumpsteer, and loose tie rod ends can magnify any other variables like thrust from the rear tires, unevenly worn tires, etc. I'm not familiar with the tire brand you're using but certain tires absolutely tramline more than others. If you want to feel tramlining, try a Hoosier R6 or any slick/ autocross tire with a stiff sidewall...
In conclusion, tramlining is absolutely an issue which can be corrected.
In conclusion, tramlining is absolutely an issue which can be corrected.
Thread Starter
Racer
Joined: Aug 2010
Posts: 472
Likes: 9
From: San Diego CA
How many miles on the car? What kinda shape are your tie rod ends in? I drove my car for a week or so after the alignment shop pointed out that I had a bad rear tie rod. The car was all over the road. Tramlining can feel similar to bumpsteer, and loose tie rod ends can magnify any other variables like thrust from the rear tires, unevenly worn tires, etc. I'm not familiar with the tire brand you're using but certain tires absolutely tramline more than others. If you want to feel tramlining, try a Hoosier R6 or any slick/ autocross tire with a stiff sidewall...
In conclusion, tramlining is absolutely an issue which can be corrected.
In conclusion, tramlining is absolutely an issue which can be corrected.
Trammeling is an issue, that's why I created this thread to see what others have done to address it.
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Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
I find the same with air pressure.
I've had 3 alignments done to fix the issue. Finally just told the guy to set it to Z06 specs.
He didn't.....but he did get it a lot better.
I have Z06 springs, Bilstien sports, C6 sway bars and new metal end links.
On any sort of rutted roads it's still a handful. And since Oregon allows studded tires in the winter, there are very few un-rutted highways.
I also have Continental DWS tires. And I think they contribute greatly to the issue. Sadly, costs too much to try a diff tire....
Not being much help I'm afraid, but I feel your pain. It sucks having this nice high powered cruiser that flat wears me out on any sort of long cruise.
Ron
I've had 3 alignments done to fix the issue. Finally just told the guy to set it to Z06 specs.
He didn't.....but he did get it a lot better.
I have Z06 springs, Bilstien sports, C6 sway bars and new metal end links.
On any sort of rutted roads it's still a handful. And since Oregon allows studded tires in the winter, there are very few un-rutted highways.
I also have Continental DWS tires. And I think they contribute greatly to the issue. Sadly, costs too much to try a diff tire....
Not being much help I'm afraid, but I feel your pain. It sucks having this nice high powered cruiser that flat wears me out on any sort of long cruise.
Ron