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Old 08-26-2020, 02:58 PM
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Default SPC UCA Race or Street

Looking to buy a set of SPC upper control arms to make it a little easier for me to do the alignment myself. I plan on trying autocross but will also be street driven (local cars and coffee meets).

My question is, should I go with the Race version (delrin bushings) thats like $40 cheaper, or the street version (rubber bushings)?

From the pictures it appears the street version will accept a stock ball joint, whereas the race looks like a 4 bolt design for the BJ.

Any info/reviews would help me out deciding.

FYI, I spoke with SPC and apparently they will be releasing a new billet version under part number 97160 in a month or so but will be priced around $1,000 for the set (including ball joint).
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Old 08-26-2020, 03:20 PM
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You say you spoke with SPC. Was that the company or Mark (Savitske)?
If the company, I suggest you give Mark a call. Make sure you have some time to talk - it might not be a quick answer. He is very knowledgeable. He can also give you some alignment hints too.

His page is: [Only registered and activated users can see links. Click Here To Register...]
Phone not listed on site (610-346-8154).

Get a copy of his book - How to Make Your Muscle Car Handle.

Cheers - Jim
I'd go bone jarring Delrin personally. The set I got from Mark are 3/4" shafts with thread in ball joints. Setting up to race (since 2009!)
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Old 08-26-2020, 04:51 PM
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Here is an old thread when I installed some. Didn’t expect a travel limited.
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I thought mine were brass bushings, I’ll have to check. Either you mention would be fine.

I installed the tall upper ball joints from howe racing later.

Last edited by rtj; 08-26-2020 at 04:54 PM..
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Old 08-26-2020, 07:59 PM
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Quote:
Originally Posted by rtj View Post
Here is an old thread when I installed some. Didnít expect a travel limited.
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I thought mine were brass bushings, Iíll have to check. Either you mention would be fine.

I installed the tall upper ball joints from howe racing later.
Ive read your post numerous times over the week. Thank you for the info. How long of a limit strap did you need to use?
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Old 08-27-2020, 04:07 PM
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I can check, but it depends on where you mount the two brackets. Just jack the front end up to the point where you want to stop the a arm and lock down the cable. Do one side at a time by jacking one side on the frame. Make sure on full or high compression the slack cable doesnít interfere.
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Old 08-27-2020, 11:27 PM
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Looks around 7Ē in length, by laying a tape on it.
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Old 08-28-2020, 12:32 AM
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Quote:
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Looks around 7Ē in length, by laying a tape on it.
Thanks very much. You didn't have to do all that. I was just hoping to order some straps before the arms come. Think they'll be here this weekend so I'll pull it all apart and make something work. I like the cable idea as I have that stuff at work. Maybe a free solution.
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Old 09-16-2020, 01:43 AM
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Think I'm gonna have to give SPC a call. Wondering if I should use the longer ball joints. Not sure what the advantage is but at full droop the ball joint cup looks a little stressed, not that it will see full droop often.
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Old 09-18-2020, 02:26 PM
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The tall ball joints are sort of a geometry improvement for the old suspension. I think there is a thread on here. Let us know what they say.
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Old 09-19-2020, 09:34 AM
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I sent Mark a question via email and he got back to me the next day
Quote:
Hi Jim,

They`re not GM components, they`re Howe Racing. They`re available in .10" increments. What height would you like? FWIW we spent a lot of time testing these and the +.50" you already have worked out best on all of our test cars.
Not the bolt-in type you have but the screw in (rebuildable).

Great service from him.

Cheers - JIm
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