Setup setup setup....
06-09-2010, 09:22 AM
#16
BUt how do you know? Have you had your car on a setup station and actually measured these things?
Here is an example of how I know you have a general setup problem.. you say you are running this setup, but you raised the car to 7+mm ride height (but you dont actually know your ride height, you just guessed). Well, did you readjust your downstops to keep your desired droop? I am guessing not, which means you are probably down to 0-1mm of droop front and rear... you can't JUST change the ride height, without changing your downstop settings, or you will ruin your droop settings.
So you already aren't running any sway bars, which is something I would of suggested removing... and it looks like you are running too much rear toe-in. That much rear toe-in will REALLY lock the rear to the ground, making the car difficult to turn. You could free up the rear end by dropping it down to maybe 2.5 or 2mm.
But again... without actually putting the car on a setup station, there is no way to tell what your setup ACTUALLY is.
Here is an example of how I know you have a general setup problem.. you say you are running this setup, but you raised the car to 7+mm ride height (but you dont actually know your ride height, you just guessed). Well, did you readjust your downstops to keep your desired droop? I am guessing not, which means you are probably down to 0-1mm of droop front and rear... you can't JUST change the ride height, without changing your downstop settings, or you will ruin your droop settings.
So you already aren't running any sway bars, which is something I would of suggested removing... and it looks like you are running too much rear toe-in. That much rear toe-in will REALLY lock the rear to the ground, making the car difficult to turn. You could free up the rear end by dropping it down to maybe 2.5 or 2mm.
But again... without actually putting the car on a setup station, there is no way to tell what your setup ACTUALLY is.
06-09-2010, 10:11 AM
#19
Man, I'm not trying to frustrate you, just asking for suggestions. I never got as specific as other on road guys, because I could just drive the car. Box stock setups with minor changes are often my best bet. So I'm looking for suggestions on changes, not a complete setup.
06-09-2010, 10:19 AM
#20
Man, I'm not trying to frustrate you, just asking for suggestions. I never got as specific as other on road guys, because I could just drive the car. Box stock setups with minor changes are often my best bet. So I'm looking for suggestions on changes, not a complete setup.
06-09-2010, 11:45 AM
#21
Man, I'm not trying to frustrate you, just asking for suggestions. I never got as specific as other on road guys, because I could just drive the car. Box stock setups with minor changes are often my best bet. So I'm looking for suggestions on changes, not a complete setup.
06-09-2010, 12:43 PM
#22
06-10-2010, 12:45 PM
#23
FOUND SOMETHING! I'm not sure if it's the main reason, but certainly an influence. I was going through my car, looking for loose screws, wires, etc... as anyone should do after running a new car a few times. I was revving it up on the bench, its smooth(love the Xray smoothness), that is until I turned the front wheels. It sounds TERRIBLE when I turn the front wheels more than about 30 degrees. I'm at my shop and can't post it, but I did take a vid to demonstrate. Initially, I found one of the CVD drive pins started to come out. Put it back and it still does it. I cannot see what's vibrating. It almost seems like the CVDs cannot deflect very far without severe vibration. I'm thinking this could be why my car turns in so poorly.
Theories, suggestions?
Theories, suggestions?
06-10-2010, 12:49 PM
#24
Tech Regular
FOUND SOMETHING! I'm not sure if it's the main reason, but certainly an influence. I was going through my car, looking for loose screws, wires, etc... as anyone should do after running a new car a few times. I was revving it up on the bench, its smooth(love the Xray smoothness), that is until I turned the front wheels. It sounds TERRIBLE when I turn the front wheels more than about 30 degrees. I'm at my shop and can't post it, but I did take a vid to demonstrate. Initially, I found one of the CVD drive pins started to come out. Put it back and it still does it. I cannot see what's vibrating. It almost seems like the CVDs cannot deflect very far without severe vibration. I'm thinking this could be why my car turns in so poorly.
Theories, suggestions?
Theories, suggestions?
If it is really really bad, lower your steering EPA value.
06-10-2010, 01:22 PM
#25
06-10-2010, 01:28 PM
#26
FOUND SOMETHING! I'm not sure if it's the main reason, but certainly an influence. I was going through my car, looking for loose screws, wires, etc... as anyone should do after running a new car a few times. I was revving it up on the bench, its smooth(love the Xray smoothness), that is until I turned the front wheels. It sounds TERRIBLE when I turn the front wheels more than about 30 degrees. I'm at my shop and can't post it, but I did take a vid to demonstrate. Initially, I found one of the CVD drive pins started to come out. Put it back and it still does it. I cannot see what's vibrating. It almost seems like the CVDs cannot deflect very far without severe vibration. I'm thinking this could be why my car turns in so poorly.
Theories, suggestions?
Theories, suggestions?
Pretty much all single joint axles chatter with a spool, some less than others. You can lower your steering throw and then tune in steering with camber links, rear toe, etc.
06-10-2010, 02:04 PM
#27
FOUND SOMETHING! I'm not sure if it's the main reason, but certainly an influence. I was going through my car, looking for loose screws, wires, etc... as anyone should do after running a new car a few times. I was revving it up on the bench, its smooth(love the Xray smoothness), that is until I turned the front wheels. It sounds TERRIBLE when I turn the front wheels more than about 30 degrees. I'm at my shop and can't post it, but I did take a vid to demonstrate. Initially, I found one of the CVD drive pins started to come out. Put it back and it still does it. I cannot see what's vibrating. It almost seems like the CVDs cannot deflect very far without severe vibration. I'm thinking this could be why my car turns in so poorly.
Theories, suggestions?
Theories, suggestions?
Take a front drive shaft out of the car compeltely, hold it in your hands, and see if the axle half of the shaft can freely bend in all directions. If it is free side to side, but binds going up and down (or vicaversa), that is your issue...
WRONG
Last edited by Cpt.America; 06-10-2010 at 03:00 PM.
06-10-2010, 05:49 PM
#28
Did some experimenting and found that 0.6mm difference from front to rear is very close to 1 degree of toe-out and for WGT 0.8mm is the same. The difference is, of course the diameter of the rim.
Now, I suppose you could do the same with the top and bottom of sedan wheels for both toe-in/out and camber as well. The trick is that the car has to be sitting on the ground when making the camber measurements.
Anyway, this could be a way of avoiding the cost of a setup station.
06-10-2010, 07:03 PM
#29
It sounds like you used too much loctite, and it mixed with your black grease on your front drive shafts. When that happens the grease itself turns to glue.... the loctite contaminates the grease... common build issue with new xray kit builders
Take a front drive shaft out of the car compeltely, hold it in your hands, and see if the axle half of the shaft can freely bend in all directions. If it is free side to side, but binds going up and down (or vicaversa), that is your issue...
WRONG
Take a front drive shaft out of the car compeltely, hold it in your hands, and see if the axle half of the shaft can freely bend in all directions. If it is free side to side, but binds going up and down (or vicaversa), that is your issue...
WRONG
Thanks for the help guys, I'll get a chance to mess with it tomorrow. I'm not entirely ready to give up on the spool, but it's gotta change from what it's doing now.
06-10-2010, 08:11 PM
#30
Tech Regular
iTrader: (7)
FOUND SOMETHING! I'm not sure if it's the main reason, but certainly an influence. I was going through my car, looking for loose screws, wires, etc... as anyone should do after running a new car a few times. I was revving it up on the bench, its smooth(love the Xray smoothness), that is until I turned the front wheels. It sounds TERRIBLE when I turn the front wheels more than about 30 degrees. I'm at my shop and can't post it, but I did take a vid to demonstrate. Initially, I found one of the CVD drive pins started to come out. Put it back and it still does it. I cannot see what's vibrating. It almost seems like the CVDs cannot deflect very far without severe vibration. I'm thinking this could be why my car turns in so poorly.
Theories, suggestions?
Theories, suggestions?
My car did some weird things when I changed settings on my speedo.I fought it until I found out it was in my radio .I had to change some radio settings to suit the changes I made in the speedo settings.
