New Suspension Preload and Pinion Angle web page

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K

KEVINS

Post count: 24,375
Joined
May 24, 2001
Messages
2,991
I have had a lot of questions on setting pinion angle and suspension preload so I made a quick web site. I added a new web page identifying the procedure for Measuring and adjusting pinion angle with respect to the Driveshaft AND the Crankshaft to my Tech Page. Choose your method:)

I also added a procedure identifying how to adjust DBL adjustable UCA's for Zero preload.

http://www.geocities.com/kdslaby/Pinion_Angle.html

I would like to add diagrams later on but I don't have time right now..

hth's a bit..
ks;)
 
Great info, I'm glad you took the time to type it all out. Do you have any pictures of the relocating you did with the upper control arms? I have really bad traction with my new engine combo and I'm wanting to try that.
 
Kevin, where have you been? Always like to say HI. :)

Brian, Sometime when I'm ambitious I'll crawl under my car and take a few pics for you. Are you still using the tranny brake? I found a .1 reduction in 60' launching at the same boost (10-12 psi) by using the Tranny-brake vs the foot brake. The best 60' so far with Kevins help is a 1.52. I was launching at pretty low boost for fear of breaking the tranny again. That should all change by next season though, I'm dropping my new tranny off tomorrow, TH400, 2.75:1 low gearset, Brake and Neal Chance convertor, 20 psi launches here I come. :D
 
Sorry, no pics but Doug has a nice clean car underneath so his pics will look good..:D Besides, mine was done differently due to the fact my car was already lowered via springs. When you get ready to try it send me some measurements so I can plot the geometry out. From the graph you can see what you need to do for bracketry...

Hi Doug! Sorry I haven't been in touch lately. I have been busy with the "Stang consulting".. A lot of guys redoing their chassis so I have been answering emails..

Time for some brews:D:

Later...
ks:cool:
 
Originally posted by Doug Jacobson
Are you still using the tranny brake? I found a .1 reduction in 60' launching at the same boost (10-12 psi) by using the Tranny-brake vs the foot brake. The best 60' so far with Kevins help is a 1.52. I was launching at pretty low boost for fear of breaking the tranny again. That should all change by next season though, I'm dropping my new tranny off tomorrow, TH400, 2.75:1 low gearset, Brake and Neal Chance convertor, 20 psi launches here I come. :D
Click to expand...

No, I had to give up the stage right brake for the PTS tranny. I also noticed a big traction improvment with the tranny brake. I will have one again sometime. Just need to get Bruce to make it fit inside his shallow tranny pan ;) I'm still trying this True radial racing, so I dont have in spectacular 60fts to pass on. I'll put slicks on it someday. Did you guys build custom upper control arms, because there isnt much room there?
 
What I did was cut out the old uppper mounts and make new ones and welded them in they take the stock locating points and go down for there. There is a 3" range to go down from the stock hole on the uppers, plus the stock hole is stil there. I had my rearend out and did all the cutting fitting and so forth from there. I left the stock holes in it until I got the measurements from kevin for the right place to drill my new holes, We left one control arm bolted in and then moved the other to the new spot and drilled the hole for it and then reversed the action on the other side.

I also had to lower the front lower mounting point :confused: by 1.75" I made brackets and welded them in too on the bottom side of the factory frame brackets. I crawl under there and snap some picks for you. You know what they say, a picture is worth a thousand words. :)

Doug
 
Because my car is already lowered with the springs all I needed to do was redrill the UCA holes about 1" lower. This was a PITA!!!!!!!!!!!!! The LCA angle was just fine as is. The factory control arms are used as is..

ks:cool:
 
I don't know, but that looks so much easier than what I did. The links he had up had drawings in it for fabricaring them, but now there gone. If those were to be made they would work great.

Doug
 
The top two links still have drawings, and theres enough pictures that I think I can get those built. The control arms will be alittle harder, but the local circle track store has a large selection of rod ends and sleeves, so it shouldn't be to bad.
 
Originally posted by Kansas T
The top two links still have drawings, and theres enough pictures that I think I can get those built. The control arms will be alittle harder, but the local circle track store has a large selection of rod ends and sleeves, so it shouldn't be to bad.
Click to expand...



I am the designer/builder of the upper control arms and IC relocation brackets. I would very much appreciate that people would NOT not try to copy my design. Just like KEVINS, we both spent a great deal of time and energy to come up with a workable design and it's unfair to both of us for someone to simply copy that design for their own use.

I may be in a position to duplicate these parts next summer. I have a few other prjects to finish up before I can consider and new projects such as reproducing these suspension parts. I also feel this design needs more track time on my car to verify the design truly works as I had hoped it would.

I am not trying to say that I am marketing these parts and trying to sell them here...quite the contrary. I designed/built these for my own use as I had a clearance problem with the Wolfe anti-roll bar. I have had several people in the past year ask if these were available, but up until this moment, I had declined all requests until I am able to fully test the design. That position may change next summer when I have more time and shop space to devote to producing these parts.
 
I'm definatly interested in a set. The motor is broke right now and I'm not real sure when I'll get it fixed, so July might work. Your design looks much better than the cutting and welding I was planning. A bolt in design such as yours will also be legal for the class racing I do.
 
Who, not trying to step on anyones toes here. I was just stating that the way you went was MUCH better than the route I took.

Kevin helped me from the get go on mine and was at my house telling me where to drill the holes so I don't think I was stepping on his toes. My gargage isn't the biggest so it may have happened once or twice, but purely by accident. :D

It was alot of work but here is all the work I did. Since my car is not lowered and sits a little higher due to fitting the 28" tires I had to move both mounting points. Here is a little page I whipped up if anyone cares to look. http://www.geocities.com/boostedbuick/Suspension.html
 
Just an idea, nothing more.

What could be done is to whip up some plans and instructions in a package that can be sold... when and if you are ready to make sets for purchase you can simply do that.

Its all about saturating the market. While I have no plans to relocate anything others might and whether by accident or looking at your online documentation folks are likely to make sets similar (not that many different ways are there?). IF there is a demand for them and you havent already gobbled up the market, someone else will. Selling plans/instructions is one way to do that even if you arent ready to make any completed sets. Might also remove you from some liability?

In the meantime you could pull the design notes from the website. ;)

Shawn
 
how do these modifications positively or adversely effect a street driven car in terms of staying on the road, in corners, brakings, ..?
 
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