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Old 11-07-2010, 08:30 PM
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McPhearson struts vs SLA

what are the pros and cons of a McPhearson strut front suspension? is it better or worse than an a regular short long A arms?

I'm building a mid engine buggy for racing in rally type road tracks, not for jumpėng on sand dunes, and I want a very good handling front suspension with about the same travel as a street car, I have a complete front end from a Toyota Supra but is got struts, should I use 'em or should I build from scratch a double A arm of the SLA type?, I'm concerned with bump steer problems with the SLA

I was thinking of using the struts without the coil springs, just the shocks, and using a transverse leaf spring, sort of like the corvette's with shackels bolted to the lower arms, this way the strut towers will be much slimmer and lighter and the gravity center will be lower, besides it will look much cleaner.

any thoughts?

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Old 11-07-2010, 10:06 PM
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Hello,
The major drawback to struts is the lack of negative camber gain in bump that you can get with a SLA design. Tire clearance right next to the strut housing can be an issue also, not to mention packaging for the upper strut mount like you mentioned. And finally, you typically get a long scrub radius with struts.

Andy
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Old 11-08-2010, 06:16 AM
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all that you mention is correct, my reasoning is that since the Supra has a very good handling I may be able to duplicate it in my buggy by using it's suspension parts, it will be used for racing on roads, sort of like the hill climbs at Pikes Peak, there's no need for lots of suspension travel, but if a SLA setups works better then I will go that way, harder to do but better results.?

that's why it's called work, if it wasn't then it would be called easy...

which way would you guys choose for ultimate road handling?
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Old 11-08-2010, 11:57 AM
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If you limit suspension travel, almost any system will work ok. SLA has the most advantages in my book.

Andy
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Old 11-08-2010, 02:46 PM
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thanks a lot Andy
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Old 11-08-2010, 04:19 PM
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you can still have almost a perfect suspension sweep with a SLA setup all you have to do is spend the time getting the shims correct on the steering arms
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