| ride heighth strain on front suspension [message #161372] |
Fri, 24 February 2012 09:38  |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
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I know this has been dicussed before about too high of heighth in rear will cause undue strain on front suspension particularly TB's and sockets during braking. The standard protocal as I understand is to set the bogie centers and the wheel hubs in alignment with each other. I yet to find this and can get the factory measurement at the hole in the frame. I had an experience years ago with a man I worked for in the 70s who had a Buick Electra (land yacht) with air shocks that he ran around with back end way up in the air. Florida had auto inspection at that time and he could not get his back brakes to hardly show anything on the brake tester but he would max out the front. After alot of repair and failing 2 more test I suggested putting the car back to normal ride heigth and it passed fine. This was with front disc and rear drums. This all leads to, would it make since to run the rear bogies a little lower than the rear hubs so as to make the braking inertia move in a lateral direction instead of a downward pressure on the front end which my story demonstrates when rear ends are to high on vehicles. I think someone also actually had some pressure figures when the rear end is to high. I run P225/75R16's on Alcoa rims. Sometimes I can take a long way around to get to a point so I thank you for your patience in reading this and some possible ideals or comments.
Thanks again
Skip
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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| Re: ride heighth strain on front suspension [message #161377 is a reply to message #161372] |
Fri, 24 February 2012 10:17  |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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Skip,
This cannot be true:
"The standard protocal as I understand is to set the bogie centers and the wheel hubs in alignment with each other."
The wheel hub is 15" above the ground with a 30" diameter tire. The bogie pins are 9 to 10 inches above the ground (normal ride height). So the difference 15 minus 10 = 5 inches. Therefore the bogie arms cannot be level. They angle upward.
I believe you are correct that a lower ride height in the rear will reduce weight transfer to the front.
Regards,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: ride heighth strain on front suspension [message #161433 is a reply to message #161372] |
Fri, 24 February 2012 21:40 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| skip2 wrote on Fri, 24 February 2012 08:38 |
I know this has been dicussed before about too high of heighth in rear will cause undue strain on front suspension particularly TB's and sockets during braking. The standard protocal as I understand is to set the bogie centers and the wheel hubs in alignment with each other. I yet to find this and can get the factory measurement at the hole in the frame. I had an experience years ago with a man I worked for in the 70s who had a Buick Electra (land yacht) with air shocks that he ran around with back end way up in the air. Florida had auto inspection at that time and he could not get his back brakes to hardly show anything on the brake tester but he would max out the front. After alot of repair and failing 2 more test I suggested putting the car back to normal ride heigth and it passed fine. This was with front disc and rear drums. This all leads to, would it make since to run the rear bogies a little lower than the rear hubs so as to make the braking inertia move in a lateral direction instead of a downward pressure on the front end which my story demonstrates when rear ends are to high on vehicles. I think someone also actually had some pressure figures when the rear end is to high. I run P225/75R16's on Alcoa rims. Sometimes I can take a long way around to get to a point so I thank you for your patience in reading this and some possible ideals or comments.
Thanks again
Skip
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Skip--after the dust settles, I have to say that the wheelbase on the GMC is long enough that the amount of travel you can get on the rear suspension will have minimal effect.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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