Time to increase my spring rates, still running the stock 250's in back. When pushed hard, the car's rear end rolls more than it should, and make the car over-steer.
Looking for suggestions for just the rear springs, or a new set-up at all corners.
If I recall correctly, the original street spring rate for a MkII with 3-link is 450 front, 250 rear?
I have the tubular suspension part sin front with a VPM sway bar, 3-link out back, no sway bar. Just looking to increase spring rates to get less body roll. On the track, I run the Kuhmo 710's.
Got an extra set of springs?
Dan
__________________
FFR5148K MkII Roadster, FRP 306 345HP w/ carb, 3-link, disc brakes, Still Gel-Coat Grey! Now with roll cage and more track stuff, wrecked, beaten, man-handled, cut up, butchered, Freaky body mods, sat on by HOOTERS girls, still barely street legal.
I cant help with your answer as I never ran sway bar. But I have set up lots of spec racers and running high springs works. Doesnt do much for your problem but
here is the part that might help. i have lots of springs in the 500 to 800 range so if someone identifies what you need than maybe I can privide springs.
Dave
__________________
No one ... has come up with a drug yet that can match the thrill of driving a race car.
It seems that I run out of driving talent before the cobra runs out of HP!
most of the challenge guys run between 700-800 front and 450-600 rear. We run 700/500. At the same time though we do not have sways at the moment and those let you run less spring. We also don't drive these on the street very much.
__________________
Marty Howard
FFR Challenge #43
2012 NASA SE Champion
2011 NASA SE Champion Race Team
I still run it on the street on occasion, so do not want to be jarred to death.
Dan
__________________
FFR5148K MkII Roadster, FRP 306 345HP w/ carb, 3-link, disc brakes, Still Gel-Coat Grey! Now with roll cage and more track stuff, wrecked, beaten, man-handled, cut up, butchered, Freaky body mods, sat on by HOOTERS girls, still barely street legal.
The normal recommendation to reduce oversteer is to soften rear springs or anti-roll bars and stiffen the fronts. Why would one increase the rear rate on a challenge series car in an attempt to reduce oversteer? Are the challenge series cars so different from other cars?
__________________
"Lotta people go through life doing things badly. Racing's important to men who do it well. When you're racing, it's life. Anything that happens before or after is just waiting." - 1971, Steve McQueen, Le Mans
The normal recommendation to reduce oversteer is to soften rear springs or anti-roll bars and stiffen the fronts. Why would one increase the rear rate on a challenge series car in an attempt to reduce oversteer? Are the challenge series cars so different from other cars?
The challenge cars have springs that are roughly double the street cars, and I still have the street springs in mine. I am looking to stiffen up the suspension.
__________________
FFR5148K MkII Roadster, FRP 306 345HP w/ carb, 3-link, disc brakes, Still Gel-Coat Grey! Now with roll cage and more track stuff, wrecked, beaten, man-handled, cut up, butchered, Freaky body mods, sat on by HOOTERS girls, still barely street legal.
The challenge cars have springs that are roughly double the street cars, and I still have the street springs in mine. I am looking to stiffen up the suspension.
Ok. You said it oversteers because of the body roll when pushed. Hadn't heard body roll being a cause of oversteer. I'm no suspension expert, but my limited understanding is that, when you increase the rear spring rate or stiffen the anti-roll bar, it simply transfers weight faster, thereby increasing oversteer. That's assuming you don't do anything to the front.
__________________
"Lotta people go through life doing things badly. Racing's important to men who do it well. When you're racing, it's life. Anything that happens before or after is just waiting." - 1971, Steve McQueen, Le Mans
Dan I run the same springs and shocks as Trevor with Kirkey seats (very little padding) and I think the ride is actually pretty decent. The wife doesn't complain either. Not many pot holes here in NC though so that could be the difference.
__________________
Mike.... FFR2100 - 331 With Kenne Bell 1500 Blower. T5 and 8.8 w\' 3.08\'s. Best ET 11.71 @ 117
Welcome to FFCars! The
representations expressed are the representations and opinions of
the FFCars.com forum members and do not necessarily reflect the
opinions and viewpoints of the site owners, moderators, Factory Five
Racing, Inc. or Ford Motor Company. This website
has been planned and developed by FFCars.com and its forum members
and should not be construed as being endorsed by Factory Five
Racing, Inc. or Ford Motor Company for any
purpose. "FFR", "Factory Five", "Factory Five Racing", and the
Factory Five Racing logo are registered trademarks of Factory Five
Racing, Inc. FFCars.com forum members agree not to
post any copyrighted material unless the copyrighted material is
owned by you. Although we do not and cannot review the messages
posted and are not responsible for the content of any of these
messages, we reserve the right to delete any message for any reason
whatsoever. You remain solely responsible for the content of your
messages, and you agree to indemnify and hold us harmless with
respect to any claim based upon transmission of your message(s).
Thank you for visiting the FFCars.com Forum dedicated to Factory
Five.
Linear Mode
