Lowering, bump steer, no re-aling /????
Thread Starter
Instructor
Joined: Nov 2001
Posts: 152
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From: Maryville Tn
Cruise-In III Veteran
Lowering, bump steer, no re-aling /????
I can't believe all I have read on this subject.. But no one has talked about scales, bump steer gauges. some even running without re-align.. toe settings are a major performance tool not to mention caster camber years of tech is lost if you lower and not reset EVERYTHING ... any one ever check shock travel after lowering??? ashpalt round track racer
Le Mans Master
Joined: Apr 2000
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Re: Lowering, bump steer, no re-aling /???? (huffyred00)
I'd like to know more about how you measure bump steer or a bump steer gauge, who has them, who normally does that kinda work, etc... The alignment guy??
When do we add the bump steer kit, before or after measuring? Do we get an adjustable bump steer kit and tweak it while measuring??
Thx
When do we add the bump steer kit, before or after measuring? Do we get an adjustable bump steer kit and tweak it while measuring??
Thx
Thread Starter
Instructor
Joined: Nov 2001
Posts: 152
Likes: 0
From: Maryville Tn
Cruise-In III Veteran
Re: Lowering, bump steer, no re-aling /???? (MelloYellow)
the way we check bump steer is with the shocks, sway bar, spring <coil over>disconnected. the shims go between the steering arm and the tie rod after you get the first reading. then suspension must be raised and lowered <jack ect> to see the changes in runout on the dial indicator.. You can get bump steer gauges at most racing parts <round track racing> suppliers. you probably have a friend that has a round track car ,if so check with him. the suspension travel in a vette is not as much as a race car but the setting is still important ... do this AFTER you lower the car
Le Mans Master
Joined: Apr 2000
Posts: 7,248
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Re: Lowering, bump steer, no re-aling /???? (huffyred00)
K, so lower, let settle. Pick final ride height.
Is this something the alignment shop could do? Set the bump steer setup before or after an alignment?
Thx again!
Is this something the alignment shop could do? Set the bump steer setup before or after an alignment?
Thx again!
Melting Slicks
Joined: Nov 2000
Posts: 2,332
Likes: 32
From: USA
Re: Lowering, bump steer, no re-aling /???? (huffyred00)
I have yet to hear anyone re-adjust their headlights after lowereing either.
I thought of it but did not do it either. I lowered mine more in the rear than the front so maybe that compensated for it.
Anyone else?
Sorry to get off topic a little.
I thought of it but did not do it either. I lowered mine more in the rear than the front so maybe that compensated for it.
Anyone else?
Sorry to get off topic a little.
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Melting Slicks
Joined: May 2001
Posts: 2,126
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From: Atlanta GA
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Re: Lowering, bump steer, no re-aling /???? (MelloYellow)
PRE LOWERING
full tank, no driver
LF 842 RF 834
LR 754 RR 782
Front 52.1%
Cross 49.4%
Left 49.6%
3212 total
full tank, with driver
LF 900 RF 848
LR 831 RR 822
Front 51.3%
Cross 49.3%
Left 51.4%
3401 total
POST LOWERING
3/4 tank, no driver
LF 827 RF 841
LR 752 RR 745
Front 52.6%
Cross 50.3%
Left 49.8%
3166 total
3/4 tank, with driver
LF 884 RF 857
LR 829 RR 786
Front 51.8%
Cross 50.2%
Left 51.0%
3356 total
Lowered 15mm, but seemed to be more:
At delivery:
LF 27 5/8" RF 27 7/8"
LR 28 3/4" RR 28 5/8"
After lowering
LF 26 7/8" RF 27"
LR 27 7/8" RR 27 7/8"
1/32 toe in rear
0 toe front
-1.25 front camber
-1 rear camber
5.8 caster
full tank, no driver
LF 842 RF 834
LR 754 RR 782
Front 52.1%
Cross 49.4%
Left 49.6%
3212 total
full tank, with driver
LF 900 RF 848
LR 831 RR 822
Front 51.3%
Cross 49.3%
Left 51.4%
3401 total
POST LOWERING
3/4 tank, no driver
LF 827 RF 841
LR 752 RR 745
Front 52.6%
Cross 50.3%
Left 49.8%
3166 total
3/4 tank, with driver
LF 884 RF 857
LR 829 RR 786
Front 51.8%
Cross 50.2%
Left 51.0%
3356 total
Lowered 15mm, but seemed to be more:
At delivery:
LF 27 5/8" RF 27 7/8"
LR 28 3/4" RR 28 5/8"
After lowering
LF 26 7/8" RF 27"
LR 27 7/8" RR 27 7/8"
1/32 toe in rear
0 toe front
-1.25 front camber
-1 rear camber
5.8 caster
Melting Slicks
Joined: May 2001
Posts: 2,126
Likes: 0
From: Atlanta GA
Cruise-In IV Veteran
Cruise-In V Veteran
Cruise-In V AutoX Winner
Re: Lowering, bump steer, no re-aling /???? (MelloYellow)
Just wanted to point out that some of us are checking corner weights and realigning after lowering. :)
I told the alignment shop to lower exactly 15mm, which they painstakingly did. I checked it on the scales both before and after to make sure the lowering was done evenly and didn't give me a bunch of cross. As it turns out, with driver the corner weights improved after lowering, since from the factory it wasn't all that well balanced. Unfortunately, there's no way to get rid of the left side weight bias without lightening up the left side of the car by removing important things like the driver seat, steering wheel, and driver door! :eek:
I told the alignment shop to lower exactly 15mm, which they painstakingly did. I checked it on the scales both before and after to make sure the lowering was done evenly and didn't give me a bunch of cross. As it turns out, with driver the corner weights improved after lowering, since from the factory it wasn't all that well balanced. Unfortunately, there's no way to get rid of the left side weight bias without lightening up the left side of the car by removing important things like the driver seat, steering wheel, and driver door! :eek:
