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lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 2:19 pm
by testrun00
Hi ,
Just had a full set of rubber on last week and thought I'd have the tracking done aswell. now my Bongo handles like shit!
Done some research and found out that lowering will knock out the rear axle alignment upto 2".
Because the panhard rod is pushing it out, has anyone else had this problem and what were your solution?
The only things I can think of is either put normal springs on the rear or make an adjustable panhard rod out of the existing one :shock:

Cheers,

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 6:21 pm
by dandywarhol
You've come up with a good there, lowering will knock the chassis alignment out andmake the van steer to the right - never thought of that before! Several people have lowered their Bongos but I don't know what they've done to sort it out An adjustable panhard rod would sort it - how much has it been lowered by?.

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 7:32 pm
by testrun00
The springs came with the Bongo there the blue ones which I think are 50mm drop from normal ride height.The links I found where these ones:
http://www.fbodyonline.com/forum/f20/ad ... -bar-1454/
and possible solution:
http://forum.ih8mud.com/tx-alamo-city-l ... r-how.html

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 8:20 pm
by missfixit70
I'm sure I remember reading ages ago about Someone supplying them, may have been Bellhill?

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 10:51 pm
by testrun00
I'll have to give them a ring there only 9 mile down the road :)

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 10:57 pm
by The Great Pretender
An adjustable rod isn't the answer. If the system design is correct the rod will move through its arc of minimum deflection, you need to alter the pickup point to get back to that arc.

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:12 pm
by testrun00
I think I understand what you mean after reading this :shock:
http://www.afcoracing.com/tech_pages/panhard.shtml
,makes sense and depends on how you want to set it up too.

Cheers,

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:17 pm
by dandywarhol
Do you not think that an adjustable bar will be ok considering the reduced spring travel on the shorter springs? I do take your point about the arc needing to be right but it looks like the bar on the Bongo is primarily an axle locator for lateral movement - or do you think it's also a body roll reducer? #-o

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:23 pm
by The Great Pretender
testrun00 wrote:I think I understand what you mean after reading this :shock:
http://www.afcoracing.com/tech_pages/panhard.shtml
,makes sense and depends on how you want to set it up too.

Cheers,
Using the bar to tune the suspension is not what you are after on a road car. pic 3 with the bar in mid position will give the minimum arc movement.

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:34 pm
by testrun00
Oh definitely the way to go is an adjustable panhard after all I'm not racing or welding new mounting points for a panhard :lol: I just want my rear axle centred then I can sort out my tracking and go in a straight line [-o<

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:36 pm
by The Great Pretender
dandywarhol wrote:Do you not think that an adjustable bar will be ok considering the reduced spring travel on the shorter springs? I do take your point about the arc needing to be right but it looks like the bar on the Bongo is primarily an axle locator for lateral movement - or do you think it's also a body roll reducer? #-o
And if the location is correct there is minimum lateral movement.
To be honest I havn't even looked at the Bongo suspension but moving the rods pickup point to recreate the origional movement seems logical.

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:38 pm
by The Great Pretender
testrun00 wrote:Oh definitely the way to go is an adjustable panhard after all I'm not racing or welding new mounting points for a panhard :lol: I just want my rear axle centred then I can sort out my tracking and go in a straight line [-o<
Then your missing the point, let me do a simple drawing with a compass and get it up on here so you can see why it wont go straight.

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:39 pm
by dandywarhol
If I remember the chassis mount is higher than the axle mount - probably to help reduce body roll then - until of course, you shorten the springs excessively and it tries to push the body to the left.........................

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:42 pm
by dandywarhol
The Great Pretender wrote:
testrun00 wrote:Oh definitely the way to go is an adjustable panhard after all I'm not racing or welding new mounting points for a panhard :lol: I just want my rear axle centred then I can sort out my tracking and go in a straight line [-o<
Then your missing the point, let me do a simple drawing with a compass and get it up on here so you can see why it wont go straight.
Will it then point North??? 8) :wink:

Re: lowered rear axle alignment out!!!

Posted: Sat Aug 22, 2009 11:52 pm
by cheffy34
This has been talked about before :!: , i have an adjustable one in a striking purple colour as certain peeps will remember looks the nuts :D shame i never fitted it :roll: Dandy did say to me a couple of year ago that i should have fitted it when i did the springs =D> #-o

testrun00 my springs are light blue name begins with an L if i remember they were a 50mm drop apparently but my v6 only came down about 30mm me reckons :twisted: any lower and i think i would loose the sump anyway :roll: it would appear the v6 engine sits lower,must measure it sometime, the wheel arch gap is deffo smaller that was all i was after :D but it does drive better than before i did it :D

Dar