12-23-2023, 01:25 PM | #1 |
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Bumpsteer
So let me ask you guys this...
Flipping the factory uprights on a '49 custom and NOT dropping the steering arms. How much actual bumpsteer does it induce? A yank, a jerk, a lane change...what? I've read a thousand times that it's there but nobody ever says how bad it is. Is anybody here able to give a first hand response as opposed to just what has been read on the site? Castor and camber and toe in are dead on so that won't be a factor. Last edited by CJStefan; 12-23-2023 at 06:10 PM. |
12-23-2023, 03:41 PM | #2 | |
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Re: Bumpsteer
Quote:
Can you give us an idea of exactly what kind of vehicle you're working with and what exactly are the "UPRIGHTS" you speak of? Coop . |
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12-23-2023, 04:04 PM | #3 |
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Re: Bumpsteer
I assuming by "uprights" you mean the steering knuckles/spindles. You will really goof up the camber. The kingpin axis is not perpendicular to the spindle axis.
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12-23-2023, 04:23 PM | #4 |
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Re: Bumpsteer
Just a guess, a 49-51ford ?
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12-23-2023, 04:28 PM | #5 |
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Re: Bumpsteer
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12-23-2023, 04:29 PM | #6 |
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Re: Bumpsteer
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Last edited by CJStefan; 12-23-2023 at 05:09 PM. |
12-23-2023, 04:30 PM | #7 |
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Re: Bumpsteer
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12-23-2023, 06:11 PM | #8 |
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Re: Bumpsteer
From my experience you will need more camber than the stock setting. The stock camber adjustment is limited. Shoebox Central has a product that attaches to the frame and the upper A arm. It will allow more camber.
https://shoebox-central.com/4953camk...adjustment-kit I have a 49 Custom - these are the station wagons, so I guess that is what you have as well. Bump steer was a problem from the beginning 'it has its own part number'. There was a steering improvement that used a AMC Matador idler arm and that I have installed. It has helped. The newer version from Chris at Shoebox Central uses a Corvette idler arm. https://shoebox-central.com/1949-195...pgrade-kit-new Rebuilding the steering box helps some. I've noted previously that I did a stock overhaul of the front suspension and steering, added Bilstein shocks (huge improvement). After doing all that work, I now would scrap the stock front end and install a modern IFS + R&P steering. If you have the station wagon - how are your doors closing? If you have a problem, PM me.
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12-23-2023, 06:18 PM | #9 | |
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Re: Bumpsteer
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12-24-2023, 04:41 PM | #10 |
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Re: Bumpsteer
I know they're pricey but how about Fatman's dropped uprights and steering arms?
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12-24-2023, 04:57 PM | #11 | |
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Re: Bumpsteer
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I believe CJ has had this experience with Fatman uprights as have I. Fitment is terrible, I have a set and as I have mentioned in a past post the kingpins don't come close to fitting the bushings. You can pass a kingpin through any bushing, top or bottom and it doesn't line up with it's other bushing. I called Fatman on this and was told "..they're not designed for the pins to slide in, you must hammer in and after turning the spindles some the bushings will cold form". I will not be installing, just went with the Aero Star springs which look good.
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12-24-2023, 06:50 PM | #12 | |
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Re: Bumpsteer
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12-25-2023, 02:41 PM | #13 |
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Re: Bumpsteer
Fatman............. run.
I was in the aftermarket suspension industry as a General Manager once upon a time. Their stuff is horrible. And downright scary on some items. That's all you need to know about them. |
12-25-2023, 02:57 PM | #14 |
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Re: Bumpsteer
I'm just surprised they're the only ones that make them. It seems pretty straight forward for any company with machining capabilities and a welder
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