rear end jumping
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From: hamilton, Ohio
rear end jumping I have eibach springs with the stock shocks and when I go through a corner or curve and hit a bump the rear end wants to jump sideways. Will new shocks fix this or what suspension upgrades do I need to make.
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From: TX
Heh... get a car with an independent rear suspension... short of that, getting shocks that will get you better rebound should improve things a little, but the fact is that corners, bumps, solid axles and speed don't mix. solid axles are best suited to strait lines
You will be able to tune most of that (or all of that) out with rebound adjustment. Some Koni SA's should allow you enough adjustment to correct most of the problem (or all of it).
And, solid axle cars do very well in the twisties. Many race series run solid axles on road courses, it's not really unusual to do so.
And, solid axle cars do very well in the twisties. Many race series run solid axles on road courses, it's not really unusual to do so.
Yep, Koni SA's. Set them toward the low end of their range. And stay away from ultra-low profile tires on the rear, since the tire is part of the the rear suspension on these cars. 16 or 17 inch wheels are best. 18 is the largest, and with 19's you are loosing traction for sure. You need some sidewall back there to help with this problem. Also stay away from huge rear swaybars; 21 mm 1LE bar is just right.
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From: TX
not saying solid axles don't work, just that IRS is better... how many legit road race cars run solid front axles? Not too many. "Suicide" front suspension is a good nickname for it. And when I look at formula 1 cars, the vehicles i believe to be the best road machines out there, I see fully independent suspensions... Yeah yeah, there are crappy IRS setups and there are fantastic solid axle setups and like we all said, shocks can help and so on and so forth, not trying to start a fight, just venting. have a good day
He asked how to correct his problem. Telling him to get an independent rear suspension is rather pointless. I'm only stating this because it appears he already has a "stick axle" car and is trying to tune it. So, it's pointless to start a debate about the merits of both suspension designs instead of just answering his question. I'm pretty sure he's not going to change the car to an independent setup, or sell it.
Ok.....We appreciate the update.
Not really relevant to the original question.
Actually, F1 cars are terrible road machines. Just try driving one on a real road. 
Yes there are, and he needed setup advice on one of the better solid axle setups.
As long as you believe that.
I will, and you should too.
Originally Posted by OldeSkool
not saying solid axles don't work, just that IRS is better...
Originally Posted by OldeSkool
how many legit road race cars run solid front axles? Not too many.
Originally Posted by OldeSkool
And when I look at formula 1 cars, the vehicles i believe to be the best road machines out there, I see fully independent suspensions...
Originally Posted by OldeSkool
Yeah yeah, there are crappy IRS setups and there are fantastic solid axle setups and like we all said, shocks can help and so on and so forth
Originally Posted by OldeSkool
not trying to start a fight, just venting.
Originally Posted by OldeSkool
have a good day
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Joined: Nov 2004
Posts: 1,118
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From: TX
Originally Posted by trackbird
And, solid axle cars do very well in the twisties. Many race series run solid axles on road courses, it's not really unusual to do so.
Anyway, my appologies trackbird, didn't realize it was you that I was
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You need better shocks. 
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Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
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