M6 60ft help
08-15-2009, 07:33 PM
#21
I bought a digital angle finder today and spent the afternoon taking measurements.
Pinion angle is:
-1.0* Using the driveshaft angle to measure it
-2.4* Using the driveline angle to measure it
Then I measure the lower control arm angles....
DS = 4.7*
PS = 3.7*
This had me scratching my head.
Then I measured from the top of the tires to the bottom of the wheel arch.
DS = 3 5/8"
PS = 3"
So I pullled the drivers side spring - and then put it back in thinking it wasn't seated fully. Measured again - same results.
I then pulled the springs and swapped sides. Measured again - same results.
For grins I measured from the sway bar mounts to the floor (note - car is on 8" blocks all the way around).
DS 18"
PS 18"
This should confirm the floor is fairly level - I also measure from the floor to the beams in the ceiling that are level. The floor was less then 1/8" off on either side of the car.
I raised the passenger side until the gap in the wheel arch was the same as drivers side. The angles on the lower control arms were even @ 5.5* uphill to the car.
So either my body spring pockets are tweaked or my rearend is tweeked.
Now I need to find a way to lower the drivers side a half inch or raise the passenger side a half inch. I don't know if I can get away with the heater hose mod or not. I might need to chop the DS spring to get the ride height leveled. Maybe an air bag would be a simple fix.....
This would explain why the drivers side tire unloads or why the car goes right when it leaves.
Pinion angle is:
-1.0* Using the driveshaft angle to measure it
-2.4* Using the driveline angle to measure it
Then I measure the lower control arm angles....
DS = 4.7*
PS = 3.7*
This had me scratching my head.
Then I measured from the top of the tires to the bottom of the wheel arch.
DS = 3 5/8"
PS = 3"
So I pullled the drivers side spring - and then put it back in thinking it wasn't seated fully. Measured again - same results.
I then pulled the springs and swapped sides. Measured again - same results.
For grins I measured from the sway bar mounts to the floor (note - car is on 8" blocks all the way around).
DS 18"
PS 18"
This should confirm the floor is fairly level - I also measure from the floor to the beams in the ceiling that are level. The floor was less then 1/8" off on either side of the car.
I raised the passenger side until the gap in the wheel arch was the same as drivers side. The angles on the lower control arms were even @ 5.5* uphill to the car.
So either my body spring pockets are tweaked or my rearend is tweeked.
Now I need to find a way to lower the drivers side a half inch or raise the passenger side a half inch. I don't know if I can get away with the heater hose mod or not. I might need to chop the DS spring to get the ride height leveled. Maybe an air bag would be a simple fix.....
This would explain why the drivers side tire unloads or why the car goes right when it leaves.
08-15-2009, 08:27 PM
#22
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I bought a digital angle finder today and spent the afternoon taking measurements.
Pinion angle is:
-1.0* Using the driveshaft angle to measure it
-2.4* Using the driveline angle to measure it
Then I measure the lower control arm angles....
DS = 4.7*
PS = 3.7*
This had me scratching my head.
Then I measured from the top of the tires to the bottom of the wheel arch.
DS = 3 5/8"
PS = 3"
So I pullled the drivers side spring - and then put it back in thinking it wasn't seated fully. Measured again - same results.
I then pulled the springs and swapped sides. Measured again - same results.
For grins I measured from the sway bar mounts to the floor (note - car is on 8" blocks all the way around).
DS 18"
PS 18"
This should confirm the floor is fairly level - I also measure from the floor to the beams in the ceiling that are level. The floor was less then 1/8" off on either side of the car.
I raised the passenger side until the gap in the wheel arch was the same as drivers side. The angles on the lower control arms were even @ 5.5* uphill to the car.
So either my body spring pockets are tweaked or my rearend is tweeked.
Now I need to find a way to lower the drivers side a half inch or raise the passenger side a half inch. I don't know if I can get away with the heater hose mod or not. I might need to chop the DS spring to get the ride height leveled. Maybe an air bag would be a simple fix.....
This would explain why the drivers side tire unloads or why the car goes right when it leaves.
Pinion angle is:
-1.0* Using the driveshaft angle to measure it
-2.4* Using the driveline angle to measure it
Then I measure the lower control arm angles....
DS = 4.7*
PS = 3.7*
This had me scratching my head.
Then I measured from the top of the tires to the bottom of the wheel arch.
DS = 3 5/8"
PS = 3"
So I pullled the drivers side spring - and then put it back in thinking it wasn't seated fully. Measured again - same results.
I then pulled the springs and swapped sides. Measured again - same results.
For grins I measured from the sway bar mounts to the floor (note - car is on 8" blocks all the way around).
DS 18"
PS 18"
This should confirm the floor is fairly level - I also measure from the floor to the beams in the ceiling that are level. The floor was less then 1/8" off on either side of the car.
I raised the passenger side until the gap in the wheel arch was the same as drivers side. The angles on the lower control arms were even @ 5.5* uphill to the car.
So either my body spring pockets are tweaked or my rearend is tweeked.
Now I need to find a way to lower the drivers side a half inch or raise the passenger side a half inch. I don't know if I can get away with the heater hose mod or not. I might need to chop the DS spring to get the ride height leveled. Maybe an air bag would be a simple fix.....
This would explain why the drivers side tire unloads or why the car goes right when it leaves.
08-15-2009, 09:21 PM
#24
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Wow well my car was ilittle off like you are talking about and the anti roll bar (drag bar) helped mine with the way you per load the bar the car sat 1/8th apart side to side .
08-15-2009, 10:08 PM
#25
Then I can play with the rest of the suspension.
Anyone have any input on the pinion angles I measured?
I'm thinking that I'll adjust it down one more degree so it'll be -2.0 using the driveshaft method and -3.4 using the driveline method.
08-16-2009, 12:38 PM
#27
Just watched the video,the car rocks over to pass side.(watch the Spoiler).Get the BMR drag bar and front shocks.The BMR fits a little better than the Spohn in the area of the control ***** if you plan on going with double adj rear shocks later on.I have the Spohn and Strange single adj rear shocks ,this also works out OK.
08-16-2009, 12:41 PM
#28
Just watched the video,the car rocks over to pass side.(watch the Spoiler).Get the BMR drag bar and front shocks.The BMR fits a little better than the Spohn in the area of the control ***** if you plan on going with double adj rear shocks later on.I have the Spohn and Strange single adj rear shocks ,this also works out OK.
I was set on the Spohn bar - as I can bolt it in then weld it, and it's cheaper too. I'll have to reconsider.
08-29-2009, 05:44 PM
#30
I need to take the car for a ride and see how it does - and it's going the track on Wednesday, weather permitting.
The new shocks seem to have a lot more extension than the stockers.
Fingers crossed that it'll 60ft better and leave straight.
09-04-2009, 10:33 PM
#31
Traction issues resolved.
I had issues with the 2-step and had to disable it.
I was chasing my tail all night.
At 1st the car spun leave at 5500rpm of the 2 step. The car backfired on every shift.
Then I thought I changed the 2-step to 5300 - droped the tires to 12 psi and got to the line - the 2-step was @ 3300rpm
Car backfired every shift.
Track decided lay down some serious prep.
I disabled the 2-step - left at 5000rpm bogged
Left at 5500 - bogged
Left at 6199 (factory limiter) bogged - 1.72 60'
Packed up and called it a night.
I needed to add some air to the tires - as it was dead hooking.
Overall not a bad night. Time to add more power
I had issues with the 2-step and had to disable it.
I was chasing my tail all night.
At 1st the car spun leave at 5500rpm of the 2 step. The car backfired on every shift.
Then I thought I changed the 2-step to 5300 - droped the tires to 12 psi and got to the line - the 2-step was @ 3300rpm
Car backfired every shift.Track decided lay down some serious prep.
I disabled the 2-step - left at 5000rpm bogged
Left at 5500 - bogged
Left at 6199 (factory limiter) bogged - 1.72 60'
Packed up and called it a night.
I needed to add some air to the tires - as it was dead hooking.
Overall not a bad night. Time to add more power
