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Tracking / Autocross / HPDE / Drifting What these cars were built for! |
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06-21-2014, 02:49 AM | #1 |
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I :heart: double A-Arms. :)
So I was swapping the front springs on the race car and while I had the shock/spring out but the rest still in place I decided to fire up the camera with my camber gauge attached.
Very cool. Ignore the caster setting on the gauge.. I neither adjust nor measure caster on this car. That setting is OEM. [ame="http://vimeo.com/98792402"]suspension travel on Vimeo[/ame]
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06-21-2014, 06:41 PM | #2 |
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IMO, front double wishbone suspension plays an important role for FWD cars because it's what drives the wheels. If your CRX was RWD and had MacPherson front struts, I wonder if it would still set similar lap times.
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06-21-2014, 09:41 PM | #3 | |
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Quote:
I don't know on the 2nd part because I tend to think I'll be fast regardless of what you put me in.
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The Following User Says Thank You to rice_classic For This Useful Post: | SirBrass (06-23-2014) |
06-21-2014, 11:31 PM | #4 | |
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Makes me wonder what the compression camber rate is on my ITR. Btw, are you using adjustable upper A-arm to set your negative camber? If so, which brand/model? |
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06-22-2014, 02:31 PM | #5 |
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Going from working on many EGs/EFs to an S13 back in the day boggled my mind when I replaced the S13's springs/shocks for the first time. I thought to myself, "hmmm..interesting. Why does this S13 have such an archaic looking suspension? I thought it was going to be awesome, from all the hype about it. Is this what domestic cars(that are known/rumored to not handle well) have too? I think so. I miss my Honda."
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06-23-2014, 07:01 AM | #6 |
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Most of the later domestics do, with the exception of the Corvette which has been SLA for a long time. Mustangs have been struts up front since at least the fox body days.
Too bad we got the McSuspension on this car. I miss my Miata. |
06-23-2014, 07:59 AM | #7 | |
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But I agree with your overall point. BMW and Porsche have proven through racing that you can be fast in a RWD car with macpherson struts at the front (and loads of static negative camber to compensate).
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06-23-2014, 08:22 AM | #8 | |
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Haha isn't that just splitting hairs at that point?
Porsche refers to them as macpherson struts btw: Quote:
EDIT: That's odd, the post I replied to (saying they were chapman struts at the rear) disappeared.
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06-23-2014, 01:36 PM | #9 | |
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The dynamic camber curve of a double arms isn't inherent to the fact there's 2 arms but to fact that they are of unequal length. On a Mac setup, if the angle of mounting to the body is very steep then a mac setup will have a dynamic camber curve. Not highly aggressive like that of a CRX but a dynamic curve nonethless. However, on the vast majority of road-going cars, the macs are mounting quite upright as the design restriction of a chassis doesn't allow a steep angle. Last time I looked at the rear of a Cayman, the angle looked pretty steep... Same with the Alfa 4C but I don't know what kind of curve is represented through the motion with their specific geometries. In the video I was baselining 4degrees because my car was in the air and on my slightly uneven garage floor. On a flat pavement with my car on he ground I run ~3 degrees up front. I would like about 3.5 or 3.75 but I can't achieve that legally because of ITA rules. I use OFFSET bushings in my anchor bolts (what my OEM UCA uses to mount to the body)
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06-24-2014, 03:12 AM | #10 |
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Honda screwed it up in 2001 when they went to struts up front. Love my EF.
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