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Old 10-17-2012, 09:46 PM
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How Low To Go?

What is considered a safe height measuring ground to lowest point on the front crossmember? I want to drop my coupe some more, but if I use 2" dropped spindles, my clearance will be 4" to the ground. Too low to be safe or OK?
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Old 10-17-2012, 10:21 PM
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check locan speed bumps at the grocery store
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Old 10-17-2012, 10:24 PM
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how low

I can do that.
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Old 10-18-2012, 02:09 AM
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In wa state the rule is no lower than the bottom of the rim of the wheel so the minimum ride height is the height of the tire sidewall..hope this helps..at that height you will bottom on some of the higher speed bumps and scrape on some drive entrances..

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Old 10-18-2012, 10:34 AM
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The NSRA uses the term 'scrub line', saying nothing should be lower than that. Here is a link to three diagrams describing scrub line: Scrub Line Hope this helps.
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Old 10-18-2012, 11:37 AM
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how lo to go

thanks fellas for your thoughts. appreciate it.
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Old 10-18-2012, 06:41 PM
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how low to go?

I went to a website to learn about the scrub line. Here is what I did. Correct me if I am wrong. I measured the lowest point of the IFS cross member to the ground - 6". I then measured the bottom of the rim of the wheel to the
ground-3 1/2 ". The difference is 2 1/2". I then subtracted the 2" for dropped spindles giving me a 1/2" clearance. Is this amount of clearance enough? I do want the low look but I also want to be safe.
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Old 10-19-2012, 05:26 AM
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my 27 has 6" of clearance and i scrape on some speed bumps.
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Old 10-19-2012, 01:14 PM
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how low to go?

you must have some humungus speed bumps where you live. I think your scrub line would be much lower than 6". with the 2" dropped spindles I would actually have 4" of clearance from the ground to crossmember with fully inflated tires. The 1/2" clearance I mentioned is the amount of clearance if rim sat on the ground, which isn't going to happen. Mt question should have been, is 4" enough clearance? Sounds like it would be marginal. I'll think on this some more.
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Old 10-22-2012, 07:39 AM
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I used air bags (springs) when I need more hight I just air them up a little,My old coupe is pretty low,with all the air out its 1/2" off the ground .its been channeled about 6"...The bags are nice i like them
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Old 10-22-2012, 12:12 PM
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Many years ago, this question was on my mind too, so I thought about it for a while and determined that the lowest OEM automobile would be the Corvette. I went up to the local Chevy dealer and crawled as close to under as I could get to push a tape measure up under the car all around. I found that nothing was any lower than 4" from the ground. I reasoned that if the General had it figured at 4", that would work for anything I would build. Down through the years, I have kept a 4" x 4" block of wood in the garage. I slide it around under the car as I'm building and everything has worked out well for me.

Slamming a car looks nearly as stupid to me as a chopped top. Monkey see, monkey do.
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Old 10-22-2012, 01:40 PM
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how low to go?

Thanks for your info. I have actually thought of doing what you did with the corvette, but hadn't got around to it. 4" drop will look great on my coupe and if too low I can always change the spindles back. The speed bumps in our local area are in the 2" range, so with some slowing down I think they can be maneuvered pretty well. I don't like the slammed or chopped look either, but I do like a nice rake on an old ford coupe.
Thanks again for your common sense idea. I am going to try again to load a couple of pics of my coupe on this site. Tried over the weekend, but did something wrong I guess as I don't find them now.
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Old 10-22-2012, 01:45 PM
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The idea behind the scrub line is that if a tire goes completely flat (you're sitting on the rim) nothing underneath scrapes the ground. Sounds like yours will just clear (by that 1/2").
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Old 10-22-2012, 01:53 PM
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how low to o

That is correct. 1/2"
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Old 10-23-2012, 07:12 AM
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Quote:
Originally Posted by techinspector1 View Post
Many years ago, this question was on my mind too, so I thought about it for a while and determined that the lowest OEM automobile would be the Corvette. I went up to the local Chevy dealer and crawled as close to under as I could get to push a tape measure up under the car all around. I found that nothing was any lower than 4" from the ground. I reasoned that if the General had it figured at 4", that would work for anything I would build. Down through the years, I have kept a 4" x 4" block of wood in the garage. I slide it around under the car as I'm building and everything has worked out well for me.

Slamming a car looks nearly as stupid to me as a chopped top. Monkey see, monkey do.
A 4x4 is actually 3 1/2' x 3 1/2" some people shouldnt be messing around with cutting tools and tape measures anyway.
4" is a good (what we call ) ride hight. and there is no better ride than a car on air bags..plain and simple

Last edited by deadbodyman; 10-23-2012 at 07:21 AM.
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