Extented Ball Joint & Taper - Chevy Impala SS Forum
 
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post #1 of 8 (permalink) Old 03-18-2004, 01:49 PM
shiggins
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Does anyone know what the taper is on the lower ball joint? I am planning on reaming out the lower to use 5/8 ball joints. I will also use 1" longer uppers with the tubular a-arms I am planning.

thanks,
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post #2 of 8 (permalink) Old 03-18-2004, 04:10 PM
Rustic
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The taper is 2" per foot. It seems to be fairly standard. In looking for a reamer bit there usualy arent many choices.

What can you tell me about the arms you are planning? are you building them yourself?
post #3 of 8 (permalink) Old 03-18-2004, 05:02 PM
shiggins
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Hello Chris,

Do you happen to know if it is a Morse, Brown & Sharpe, Jacobs or other taper? It does not appear to be any of these. As they are much less than the 2 per 12 (.16667 per 1) you describe. Taper info

As for the arms, I am still doing the planning, but the initial information is as follows:

- ream lower ball joint hole for 5/8 ball joint
- fabricate tubular arms of DOM 4130 chrom-molly tubing
- use 1 extended shaft ball joint in top arm to raise pivot point 1
- lower upper a-arms mounting point ~1 (without requiring modification to the mounting point on the frame I have a plan for doing this)
- use Delrin or Nylon bushings (I am about to buy a lathe to turn these bushings)
- I plan to build lower shock mount to be strong enough for coil over shocks if desired > I need to work this out some as a coil over shock could be mounted closer to the balljoint increasing spring efficiency (lighter spring) and reducing stress on upper and lower shock mounts > if I do this then I would have to build a different lower if standard springs were to be used > I currently have HALS on my car and hotchkis spring in a box, so I would have to sell my front shocks and new springs and buy new coil over shocks

I considered building these and selling them, but am concerned with product liability issues at this point and am still investigating.

thanks,
 
post #4 of 8 (permalink) Old 03-18-2004, 05:25 PM
KJH96SS
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Chris, Stephen:
I never found a reamer with the correct taper. I found one that was close and had a tool sharpening place modify it to the correct taper. It is in the basement somewhere.

Ken Hennessy
96 BBB SS, 96 BBB B4U
post #5 of 8 (permalink) Old 03-18-2004, 07:15 PM
BackInBlack
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I got mine from Chadwick Reamers 877-492-8249
85020 Taper 1.5"/ft. Range 7/16"-1". Spiral cut, 6 flute. 1/2" shank with hole and handle pin, 01 tool steel treated to Rockwell 60 hardness. $50.40.
85500 Taper 2"/foot. Range 3/8"-1-1/8". $70.88.
I have both and I'm happy with them. These are the best prices I was able to find.
Tim
post #6 of 8 (permalink) Old 03-19-2004, 09:24 AM
Rustic
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Hey Ken....
If it's just "in the basement somewhere"... would you be willing to sell it?
post #7 of 8 (permalink) Old 03-19-2004, 09:39 AM
shiggins
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It looks like Tim's source was over $20 cheaper than www.stockcarparts.com.

Tim,
What did you use the 1.5"/ft. for? Is that the upper taper?

Thanks for all the input guys.
post #8 of 8 (permalink) Old 03-20-2004, 05:07 PM
KJH96SS
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I found my reamer in the basement. I started with a K-D P/N 2044 tapered reamer. I think the place I had modified it to the correct taper was in Riverdale, IL. Indiana Tool and Machine? I Don't remember exactly because it was 20 years ago for a another GM spindle modification job. I think I'll keep it because I may want to upgrade balljoints in the future. I might consider loaning it to you, Chris.

Ken Hennessy
96 BBB SS, 96 BBB B4U
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