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Which means "Evil Twin". Lets see your projects where you change boring into fun or create the fun from scratch.
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 Post subject: Re: 308 suspension setup
PostPosted: Tue Apr 02, 2019 6:49 pm 
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Posts: 2801
TheDarkSideOfWill wrote:

The Swift is a tiny vehicle with low contact pressure to begin with. The fact that underinflating the tires (further reducing contact pressure) made it better in the rain says that was a problem with the specific make/model of tire you were using rather than a problem with the tire sizing. Of course you *should* have seen the opposite effect: increasing the tire pressure made it more resistant to hydroplaning. Tire carcass construction can have some really weird effects on handling. .


contact pressure= tire pressure. That is true for any tire, but the swift was light so very few in^2 actually on the ground at 35 psi....1800/35=51.4in^2 divided across all 4 tires. My bmw was double that at the same tire pressure. tire brand didn't much matter on the swift....they are all awful and it killed front tires about every 15k-20k miles so I got a lot of opportunity to test different options....clearly it also had a geometry issue.

This is where I was going though, most all the testing I've seen is for cars with normally sized tires that have a nearly square contact patch and the base model swift acted normal, the GT did not. My 328 has the factory sport wheel/tire package and is also quite prone to hydroplaning, I have a buddy with nearly the same car with base wheel package and he doesn't have the issue but mine get really unsafe when the tread gets anywhere near the tread markers. Its a wide tire giving an unhelpful shape contact patch in the rain thing I'm pretty sure that would go away with narrower tires.

Non of this really matters to the 308 I suppose since I have no real desire to drive it in the rain....the roof leaks.


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 Post subject: Re: 308 suspension setup
PostPosted: Thu May 30, 2019 9:20 am 
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The wider the contact patch, the harder it is to channel all the water out of the way, regardless of contact pressure pushing said water.


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 Post subject: Re: 308 suspension setup
PostPosted: Thu May 30, 2019 11:34 am 
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Sounds right.

I need to get the new wheels ordered but it's looking like 8.5" front and 10 rear to both fit the wheel wells and the available forgings


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 Post subject: Re: 308 suspension setup
PostPosted: Thu May 30, 2019 1:56 pm 
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Just cut out the 2x2 structural tubing and replace it with 1x3... instant 11" rear wheels. :lol:


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 Post subject: Re: 308 suspension setup
PostPosted: Thu May 30, 2019 2:30 pm 
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They still don't have a forging ;)

For me the issue is where I mounted the oil return pump....very little space left


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 Post subject: Re: 308 suspension setup
PostPosted: Thu May 30, 2019 3:10 pm 
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These guys have wide fenders at the stock wheelbase: https://www.berlinettamotorcars.com/fer ... ionkit.htm


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 Post subject: Re: 308 suspension setup
PostPosted: Thu May 30, 2019 4:04 pm 
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I've looked at those but am not sure I want to alter the body


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