jamesbond007ltk
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 posted on 30/1/07 at 03:35 PM |
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Weight transfer problem?
Not sure if i have asked this before. Thought i had but cant find the post...
Anyway, problem is that when i brake my front left locks up too early, i.e. way before the right. Thought it may be to do with tyre contact patch due
to wrong camber etc.
Checked this and seems fine.
Measured corner weight a while back and front left was lighter than right. Can't remeber by how much, cant find notes, but think it was quite a
lot.
btw problem also occurs with passenger in car.
Although there is some balance issue accross the front axle i also beleive the front wheels both lock too easily.
I am now beginning to wonder if not enough weight is being tranfered to the front of the car. Could this be due to insufficent front shock travel?
I am lost at the moment so any help will be appreciated. (no map, GPS or SATNAV jokes please!)
Rich
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rayward
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| posted on 30/1/07 at 03:38 PM |
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are both side pads free to move in the calipers?,could either of your discs be warped(meaning the pads get pushed further off the disc, and have to
travel further before they brake)?
Ray
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jamesbond007ltk
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| posted on 30/1/07 at 03:40 PM |
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new pads, new dics, new calipers. Obviously this does mean they are faultless. Although at SVA my front axle showed a 0% imbalance.
The brake test doesn't take into account weight transfer, static weights etc. hence my belief that weight is the cause of my problem.
[Edited on 30/1/07 by jamesbond007ltk]
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jimgiblett
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| posted on 30/1/07 at 03:57 PM |
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You could try and wind up / down a couple of threads shock of the offending corner (i.e. compressing the spring slightly) this should apply more
balance weight to it. If this helps I'd suggest investing in some corner weighting. If not it suggests other problems to address.
- Jim
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JAG
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| posted on 30/1/07 at 04:29 PM |
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Sounds like a weight distribution problem. You need to get your corner weights sorted out.
Only thing to bear in mind is that you'll never get both front wheels locking together consistently. To many variables and most of them out of
your control.
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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britishtrident
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| posted on 30/1/07 at 04:38 PM |
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Wind up up the spring platforms on the left front and right rear very slightly -- try a couple of turns on each -- even this might be too much.
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rav
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| posted on 30/1/07 at 05:13 PM |
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If the front is locking up earlier than you'd expect perhaps you need to distribute more braking force to the rear?
Thats assuming the front tyres are getting full grip when braking, for instance if the car was diving and gainging a lot of negative camber you would
loose grip at the front end, as you will if the corner weights are set up unevenly.
The other possibility of one wheel locking up could be uneven damping left to right - perhaps you could swap the shocks over and see if that makes the
right lock up?
Mark
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rav
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| posted on 30/1/07 at 05:14 PM |
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gainging = gaining!
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Bob C
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| posted on 30/1/07 at 05:58 PM |
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Sounds like corner weights to me. You'll probably need to alter the rear spring seats too as the issue is likely to be one diagonal taking a lot
more weight than the other.
cheers
Bob
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NS Dev
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| posted on 30/1/07 at 06:43 PM |
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what spring rates are you using?
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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jamesbond007ltk
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| posted on 30/1/07 at 06:46 PM |
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I'll have to check them. its a long while ago i got them!
quote:
Originally posted by NS Dev
what spring rates are you using?
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roadrunner
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| posted on 30/1/07 at 07:24 PM |
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Could one of your calipers need bleading, just a thought.
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MikeRJ
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| posted on 30/1/07 at 11:06 PM |
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Air in one caliper will have the same effect on the other caliper, providing it's on the same circuit. More likely to be corner weights, but
they must be a fair bit out I'd have thought.
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jamesbond007ltk
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| posted on 30/1/07 at 11:13 PM |
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Thanks guys. But it cant be air. As i said before SVA test showed 0% imbalance accross front axle. The left lockup problem has always been there.
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procomp
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| posted on 31/1/07 at 07:50 AM |
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Hi if all seems right with the brakes then get the corner weights set properly.
If as you say the front left was a lot lighter than the front right then you have already found the problem.
For a corner weight setup only most places should only be charging £30-£40 tops try finding a good reputable place as not all places manage to get
thier head around what they are doing when coner weighting leaving you with other problems.
cheers matt
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