View Single Post
AZAirCooled AZAirCooled is offline
Registered
 
Join Date: Sep 2007
Location: Somerset, PA
Posts: 288
Garage
Thanks to everyone for the feedback! My 911 keeps getting better! I love the Pelican Parts forums!

Last evening on the way home I changed the air pressure to approximately(gas station stick gauge) 29/34. WOW! The weird "weaving" went away almost completely! I can barely feel the "weave" but it is no longer scary/unsafe. Today I will check/set the tire pressures completely cold with my digital gauge to 29psi front and 34psi rear. Man I feel dumb as this is what I used to keep the 195s at (per the owners manual).

Based on the great feedback from my fellow Pelican enthusiasts, the small remaining effect may be the "tire squirm" differential between the broke in front 195/55/15 Yokohama S Drives and the new rear 205/55/15 Yokohama S Drives. So I think I will just drive it for a while to see if it goes away as the new rear tires break in.

There has been such a great response to my problem post that I would like to ask those following this thread to weigh in on what you feel would be my best my final wheel/tire set up.
As stated, the car now has broke in 195/55/15s Yokohama S Drives on 6x15 Fuchs up front and new Yokohama S Drive 205/55/15s on 7x15 Fake Fuchs on the rear. This gives me a 1976 Carrera 3.0 tribute sans the rear flares, 185s front/215s on the rear, a little weight, and 20hp (coming with SSIs). Plus I thought 195s up front would give a little less oversteer for additional safety on the street. I was hoping with upgrades, updates, and backdates to match or exceed the performance envelope of a Carrera 3.0.

In the garage I have 2 additional 6x15 wheels, 7x15 wheels, and 195/55/15 matching Yoks.
With minimal money/effort I could change to:
1. 205/55/15 Yoks on 7x15 all around.
2. 195/55/15 Yoks on 7x15 all around.
3. 195//55/15 Yoks on 7x15 front and 205/55/15 Yoks on 7x15 rear.

Long term options are:
1. 195/50/16s on 7x16 all around.
2. 195/50/16s on 6x16 front and 205/50/16 on 7x16 rear.
3. 205/50/16 on 7x16s all around.

Specifically, I would like feedback on staggered tire/wheel combos verses the same sizes all around on 911's. It seems that smaller tires up front would provide some understeer on a car that wants to oversteer. This is my first rear engined car. I have always driven hard on occasion and am accustomed to a predictable, controllable, 4 wheel drift at a cars limit of adhesion. I have heard stories of 911s handling great until thier limit of adhesion when the rear would suddenly come around. I would imagine this to be uncool on a mountain road if true.

P.S. The car received a four wheel alignment but not corner balancing. Rear fenders are rolled. Photos are before lowering.

Thanks again,
Bob
__________________
1975 914 1.8

Last edited by AZAirCooled; 05-30-2011 at 02:23 PM..
Old 05-30-2011, 08:13 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #30 (permalink)