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Cornering Optimizing your suspension system.

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  #46  
Old 11-17-2006, 03:13 AM
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Nice read!

If its good enough for Bobs racecar its good enough for my car!
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  #47  
Old 11-17-2006, 05:16 AM
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What happens when you hit a pot hole or seam? Does the impact feel much larger as compared to the stock setup? I'm not sure I'd like to take these out on the 405 with my car to test...
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  #48  
Old 11-17-2006, 05:57 AM
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I am so ordering these... hoping the wife doesn't catch on...
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  #49  
Old 11-17-2006, 02:10 PM
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Quote:
Originally Posted by JuniorMint
The installation is still the part that worries me, I have heard enough about them to sell me on them, I'll be buying a set after I get camber plates and control arms. I emailed Alta and they sent me the installation instructions, they dont seem all that bad, but they do mention a hydraulic press, to press the OEM rubber bushing out of the mount, and I assume to push the PSRS back in. The last time I checked I dont have a press in my garage.
J.M., Your absolutely right you do need a press & clocking the P.S.R.S. during install is critical, soo... I would rate this install pretty high on the difficulty scale as not a back yard deal or a hammer deal.

You could use a jack & jack-stands to drop the sub frame & remove the bushing & take them to your local machine shop & get them to do the press work & then reinstall them yourself.

I wouldn't recommend it to anyone but the most die-hard backyard/home mechanics, its a pretty tricky install & something you wouldn't want to have to do twice!
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  #50  
Old 11-17-2006, 02:23 PM
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Quote:
Originally Posted by Strom
What happens when you hit a pot hole or seam? Does the impact feel much larger as compared to the stock setup? I'm not sure I'd like to take these out on the 405 with my car to test...
I have only used the P.S.R.S. on the race track, so no pot hole encounters.

I haven't tested these yet on my street MCS, but in theory it should not have any negative effects on ride quality, because it just acts to stabilize the control arms pivot point.

Your shocks, springs & tires is what can effect/change the ride quality over potholes.
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  #51  
Old 11-20-2006, 11:55 PM
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That is the trade off for stiff suspension items like this. Big sharp holes, are more pronounced. Not damaging, just a little scary the first time or 2. But in normal cruising and fun driving, this part will not be very noticeable.

We first noticed this problem when we tied down our Mini to a trailer, and you could move the front wheels forward, when tightening the straps!
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  #52  
Old 11-21-2006, 06:28 AM
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Quote:
Originally Posted by ALTA2 View Post
That is the trade off for stiff suspension items like this. Big sharp holes, are more pronounced. Not damaging, just a little scary the first time or 2. But in normal cruising and fun driving, this part will not be very noticeable.

We first noticed this problem when we tied down our Mini to a trailer, and you could move the front wheels forward, when tightening the straps!
Yeah, it's pretty apparent watching cars go from WOT to closed throttle on a dyno. Seems like they almost move as much as the engine!
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  #53  
Old 12-06-2006, 04:48 PM
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Would not these overly flexible stock bushing cause an unpleasant change in the bump steer also?
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  #54  
Old 12-07-2006, 11:12 AM
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Quote:
Originally Posted by ALTA2 View Post
That is the trade off for stiff suspension items like this. Big sharp holes, are more pronounced. Not damaging, just a little scary the first time or 2. But in normal cruising and fun driving, this part will not be very noticeable.
Jeff,

Do you think the loss of steering dampening from removing the existing bushing will result in damage to other steering or suspension components, particularly in street driving? How about it's effect on the car's crash-worthiness? Side note: Did you consider a polyurethane replacement bushing as an alternative?

This sounds like a nice addition to a performance suspension. I think I'm going to have to add this to my list of upcoming mods. Props for what you guys are doing.
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  #55  
Old 12-07-2006, 08:14 PM
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don't forget the bump steer, Bump Steer, bump
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  #56  
Old 12-07-2006, 08:28 PM
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Quote:
Originally Posted by pbraun View Post
don't forget the bump steer, Bump Steer, bump
It could be worth it
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  #57  
Old 12-07-2006, 08:34 PM
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bump steer adjustments are a time consuming pain in the butt task, but sure are worth it! Done right, the car stays in correct allignment under all conditions of suspension compression and bounce, and all conditions!
Can make a MAJOR difference!
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  #58  
Old 03-05-2007, 09:23 PM
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Default ALTA "Positive Steering Control System"

Anyone try this yet? What are the user reviews? Seems like a really good thing to do to me, but I would like to hear from some folks who have done this, first. Just out of curiosity.
p.s. I drive a GP and am looking to add some other suspension stuff also, like a larger rear bar, end links and control arms, maybe....any feedback would be appreciated! TIA,
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  #59  
Old 03-05-2007, 09:46 PM
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The last I heard was where you last posted: http://www.motoringunderground.com/f...ead.php?t=3573

Bob still really likes them.
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  #60  
Old 03-05-2007, 09:50 PM
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Mine are in a box between here and Cali on a FedEx truck. Due in on Wen. Mini is due back to me on 3/16

Dr Mike of Texas Speedwerks had good things to say about them but was unsure if they worth the premium over the Powerflex ones. We did put a set of the Powerflex ones in a Cooper on Sat during a tranny swap. Sadly a seal was wrong on the tranny so that was not finished. So no comments on the feel.
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