BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
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September 2017

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 Front frame brace from Pro-Touring F-body

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Posts : 57
Join date : 2011-07-17

PostSubject: Front frame brace from Pro-Touring F-body   Sun Aug 28, 2016 12:38 pm

A long time ago prior to building the S/C T-56 Brembo Brake $$$ export cars; I exchanged an 94 Impala SS frame for one from Progressive Automotive,a radically more rigid frame in every plane. The car rode better and handling improved a little. Seemed counter intuitive, but it wasn't. The more rigid frame leveraged the suspension with less frame flex, so it felt a little more precise in handling and it rode better because the whole car was more tied down. Flash forward and Install the Pro-Touring Sway Bar Brace and something similar happens in front. It took energy to flex the front frame rails without the brace, which effectively was like having a smaller, less stiff sway bar. If some bar stiffness (roll resistance) is used to bend the frame, it's not available for roll resistance. Adding the brace makes the frame more rigid so the previously wasted energy now is like making the suspension stiffer. So the frame being stiffer does not make the car ride harsher; it's the now more effective front sway bay, as if you increased the diameter/spring rate of the bar, making the suspension stiffer. That's what you feel. Take off anything that makes the frame more rigid and you'll perceive a softer ride but that's because you're back to diminishing the efficacy of the sway bars and springs, making the suspension feel less stiff. An infinitely (impossible at least today) rigid frame with no frame spring rate (flex) would ride better with a set up for equal handling to a weak frame car because you could use softer springs and sways to get equal handling now that you're not wasting suspension energy bending the weak frame.
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phantom 309


Posts : 257
Join date : 2009-10-11
Age : 107
Location : in the gr8whtnorth

PostSubject: Re: Front frame brace from Pro-Touring F-body   Sun Aug 28, 2016 2:43 pm

Interesting post,. right out of the blue,.

A really good set of shocks set on stun on the extension side,. and gentle on the compression side work wonders for ride and handling too,.

I really like the weld in rear brace,. cheap and nasty but really effective,.,. which appeals to me

Similar to 4 lengths of 5/16th preloaded chain added at the track for a little stock appearing track time,?. Wink
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Front frame brace from Pro-Touring F-body
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