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-   -   Upgrading Sway Bars front and rear with sticky tire (https://www.rx7club.com/1st-generation-specific-1979-1985-18/upgrading-sway-bars-front-rear-sticky-tire-1079310/)

JIMMY54 02-26-15 11:34 AM

Upgrading Sway Bars front and rear with sticky tire
 
I've done some searching but still have some questions.

So the specs currently:

150 or 175lbs rear adjust. ISC rear coil over set up
300LBS front ground-control front coil overs
RE-Speed camber plates
Tokico Blues Shocks
Stock Front/Rear sway bars
215/45/17 front
235/45/17 Rear. (Will be upgrading to some sticky tires)

Should be about 300 RWHP.

I will be ordering the front ST sway bar 1"5/8 and deciding if I should order the adj. rear sway bar as well. From what I have read, having the larger front bar, I should definitely keep the rear bar installed, but is it worth upgrading? or shall the stock bar be sufficient? It's not a track monster or anything, but while I'm in there........ You know how it is! LOL

j9fd3s 02-26-15 12:16 PM

i think most of us would remove the rear sway bar completely

RXDad 02-26-15 01:56 PM

Ride Height
 
Are you running stock ride height or lowered?

RXDad

JIMMY54 02-26-15 02:07 PM

Lowered, but I can't tell you exactly how much since I built the car with coilovers and never experienced the stock height.

RXDad 02-26-15 02:35 PM

Due to binding in the lowered 4 link rear suspension, rear roll stiffness is quite high, leading to a large tendency for oversteer. Adding rear roll stiffness with a bar only makes this tendency greater. Your proposed front bar is quite stiff also. It will be very easy for you to play with no rear bar, stock rear bar and ride height to get the compliance you need for best handling. I would only go with the stiffer rear bar once you've proven that it is necessary. You can also work with spring rate to adjust stiffness. Most people, like j9fd3s has indicated, have reduced roll stiffness in the rear suspension.



RXDad


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