On the straightaway, how much does the rr spring/shock compress?(from ride height)
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On the straightaway, how much does the rr spring/shock compress?(from ride height)
Depends on track shape. Often it's extension.Quote:
Originally Posted by ZERO25
Yep and actual data would blow most people's minds. Often what you think happens is quite the opposite.Quote:
Originally Posted by MasterSbilt_Racer
Ok, give me some parameters!Quote:
Originally Posted by MasterSbilt_Racer
Until something stops it, unless you really tie it down with a shock. Anything from 1/4" compress to 1.25" extension is well with reason.Quote:
Originally Posted by ZERO25
What do you think their goal should be? Wouldnt it help aero wise to get it down lower.
Some of the better cars at Eastbay were quite a bit lower. I saw a couple of rr springs that were put on before the features and they were very small.......i would say in the 150 range.
You get the rr too low, it kills aero. Air is going to get under the front. It could be because the rr tire was the only one that worked, due to compounds allowed. They were probably trying to get the car to turn off throttle.Quote:
Originally Posted by ZERO25
Lift arms will Lift, until something stops it.(chain, heavy tie down shock...etc) Plus lift arm is on the right side of the rear end bell, which will try to plant the rr just a little harder because it is the closest tire to lift arm.
Then there is the J bar....
Also with the rotational direction of the gear set in a QC, it is trying to plant the RR harder as well.
Lots of things not thought about going on, with the RR of these cars.
With shorter lift arm lengths being the current trend, that has a bigger effect than it used to.Quote:
Originally Posted by JustAddDirt
We won a few races several years ago with lift arm 30 inches on a 250 spring no bump
History repeating itself?Quote:
Originally Posted by MasterSbilt_Racer
Like the old Smack days......325 @ 32"! Thats what worked for us in the nlms days!
You may find some 4" bump/helper springs on the rr to increase the extended load down the straight and maintain compression load. Without DA who knows on rr compression, personally I work with the 2" # and visually observed posture.
I haven't done anything different on 5th coil since 1998. Tried stuff, but never found anything better.Quote:
Originally Posted by ZERO25