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Bump Stops... 

 

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 Post subject: Bump Stops...
Posted: Sat Apr 28, 2007 12:07 pm 
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G'day

I have a NL fairlane sitting on SuperLows... Shorten shocks and yeah...

Up in the hill there is a few Bumpy roads... And i only have about 2inch of travel IF that...

At the moment i have a Rub mark of two on my Tailshaft, from... Ummm... "Kissing" the underneath on my car.

I want to "Cut" down the bump stops a little, just so i get that Little bit more travel, Hoping that than it wont hit the stops as much after that. And all in all be a better ride.

Cheers for any help

Parker

 

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Posted: Sat Apr 28, 2007 12:33 pm 
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Dont cut the bump stops as you will damage the shocks and drive shaft will hit the floor more. Being a Fairlane i would have used Heavy Duty super lows on the rear bieng more weight in the lane. I would also wheck the rear upper and lower trailing arm bushes for wear as they can if worn allow the diff to pull up more on the front allowing the driveshaft to hit the floor.
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Posted: Sat Apr 28, 2007 2:44 pm 
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Lift it back up to LOW height, then prob is solved.

 

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Posted: Sat Apr 28, 2007 5:32 pm 
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cjh wrote:
Lift it back up to LOW height, then prob is solved.
:(

tryin to wreck all my fun! lol


This would be the right thing to do tho... I know.

cheers

 

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Posted: Sat Apr 28, 2007 5:35 pm 
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joolz wrote:
Dont cut the bump stops as you will damage the shocks and drive shaft will hit the floor more. Being a Fairlane i would have used Heavy Duty super lows on the rear bieng more weight in the lane. I would also wheck the rear upper and lower trailing arm bushes for wear as they can if worn allow the diff to pull up more on the front allowing the driveshaft to hit the floor.



good answer... thats what i wanted to know, if there was anything really bad that could happen.

I'll get priceing on H/D superlows, and check bushes next time it's in the workshop...give me a day! lol

cheers

 

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Posted: Sat Apr 28, 2007 5:51 pm 
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being an NL the top mounts on the diff should have tilt ajustment (3 holes) the tilt can be adjusted by changing the position of the top arm into another hole...

 

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Posted: Sun Apr 29, 2007 9:18 am 
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sexyr6 wrote:
being an NL the top mounts on the diff should have tilt ajustment (3 holes) the tilt can be adjusted by changing the position of the top arm into another hole...


Changing the position to one of the other 2 holes on the diff (if fitted) will change the pinion angle too much. The only way to use the other mount holes is to use the longer upper trailing arms but in this case it isnt the problem.
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Posted: Sun Apr 29, 2007 10:52 am 
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joolz wrote:
sexyr6 wrote:
being an NL the top mounts on the diff should have tilt ajustment (3 holes) the tilt can be adjusted by changing the position of the top arm into another hole...


Changing the position to one of the other 2 holes on the diff (if fitted) will change the pinion angle too much. The only way to use the other mount holes is to use the longer upper trailing arms but in this case it isnt the problem.


so garenteed that when the car was lowered that the tilt angle was not altered to suit the new height, and as for longer upper trailing arms they do not exist...hence for the need for the adjustment holes...

 

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Posted: Sun Apr 29, 2007 11:35 am 
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sexyr6 wrote:
joolz wrote:
sexyr6 wrote:
being an NL the top mounts on the diff should have tilt ajustment (3 holes) the tilt can be adjusted by changing the position of the top arm into another hole...


Changing the position to one of the other 2 holes on the diff (if fitted) will change the pinion angle too much. The only way to use the other mount holes is to use the longer upper trailing arms but in this case it isnt the problem.


so garenteed that when the car was lowered that the tilt angle was not altered to suit the new height, and as for longer upper trailing arms they do not exist...hence for the need for the adjustment holes...


Upper trailing arms come in 2 lengths (320mm and 350mm) The EF and XR use the 350mm and EL use 320. By simply changing the position on either the top centre or the rear hole with the 320mm arms it will give the driveline an excessive pinion angle of about 20deg (max pinion angle 4deg) So basically it simply is not recommended. The only way to use the rear mounting hole on the diff is to use the XR type trailing arms which in this case wont help. I know because i have used both types on me EL.
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Posted: Sun Apr 29, 2007 11:51 am 
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ok furry muff you win lol...

 

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Posted: Sun Apr 29, 2007 11:57 am 
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Its not a matter of winning its a matter of giving correct advice that will not make the car unsafe.
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Posted: Sat May 05, 2007 10:06 pm 
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I am gettin some Hard rubber spring mount spacer thingys! yep yep

My mechanic said it should give a little lift of about half a inch...

This should be enough.

Cheers and thanks for the help

 

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