QUOTE(76-914 @ Oct 29 2010, 08:36 PM)
I need to find a place to do the 4 wheel alignment. I want someone that speaks Porsche not a general auto shop or chain banger. I'm in Temecula but will drive a bit if they're open on Sat's. Thx
Hey Cevan,
Before you go for a 4-wheel alignment, I suggest you KNOW the settings you want.
Stock settings for rear toe-in SUCK since the rear suspension Toes-in by itself as the wheel is loaded in a corner. I bump-steer measured mine and was astounded to find that the loaded wheel toes-in by .200" in 2 inches of upward travel. At the same time the unloaded (inside wheel) toes-out at the same rate (that is it turns toward the inside of the corner as is the loaded wheel.
What this all means is that the rear of the car will stay STUCK and force the car into big understeer. Since the cars were made in the Ralph Nader era, you can understand why Porsche did not want to get caught in law suits because a 914 COULD oversteer.
To do some research, I recommend chasing the issue in the Paddock Forum where I have posted a lot of info, along with others. For a daily driver, I would recommend 1/16" toe-in at the front and 0 to 1/8" TOE OUT in the rear, static settings. Depending on how hard you drive your car, you can go from stock camber settings to -1/2 degree MORE NEGATIVE in the front and -1/2 to -1 degree
MORE NEGATIVE in the rear. The rear camber is a trade-off between improved balance and tires wearing too much on the inside. Thus, you can pick a setting and then watch your tire wear to see what is the best Compromise setting for your usage. Of course, if you can get your hands on a tire pyrometer, you could do some fast running on a twisty road and learn istantly by comparing inside, center and outside temps.
Another thing to know: given the limitations of the Porsche design for the rear suspension, you do NOT want to lower the car much. I tried and and it only messed up the whole camber curve....bad handling resulted. I'm running my track-prepped 914 v8 at 5" - 5-1/2" at the rear belly-pan bumps and 5" in the front.
I hope this is useful info,
Terry