| [GMCnet] JUST WONDERING [message #60242] |
Thu, 15 October 2009 20:57  |
Charles Aulgur
Messages: 78
Registered: March 2006
Karma:
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KEN POSTED:
Charles, et al,
After spending a little time thinking & drawing, I've finally seen the
light: You're right about the down-force shift from the rear wheels to
the center wheels with just the rear swing arm. Big surprise! :-)
With your suspension mods on the center and rear wheels, someone with a
HydroBoost driving 6-wheel disc brakes should have truly phenomenal
brakes.
A. Ken,you do not need HydroBoost to have great brakes. When we did
all the brake testing on the reaction bar system the first of this
year we tested various combinations of calipers sizes and different
brake pads. With 80 mm calipers and yellow brake pads on all six
wheels, we could slide all six wheels with the pressure from a stock
P-3 MM. That is more brakes then anyone needs as you loose control
of the vehicle with all six wheels sliding.
Without the benefit of a more powerful booster, I'm still not convinced
that the 4-link will be necessary on the rear wheels. Smaller calipers
could prevent sliding there at much lower cost than the 4-link.
A. I have to disagree with you on this statement. Having the reaction
bars on the rear two wheels improves your braking capability more
then having them on the mid-axle during high pressure stops. The
reaction bars on the mid-axles increases there capability by
utilizing approximately 1/2 of the braking energy that is normally
wasted lifting the rear of the coach. Thus, most of the braking
energy on the mid-axle is used to slow the coach. However, the mid-
axle tires are more likely to slide because they are now only
carrying 1/2 of the weight of the rear of the coach. The rear tires
are not taking weight off themselves so you gain all of the braking
energy on the rear wheels that was previously ZERO with them being
lifted off the ground during hard braking. With the reaction bars on
all four rear wheels, both sets of wheels should provide similar
braking capability under all braking conditions..
Chuck Aulgur
La Mesa, CA
Congratulations, Chuck. Terrific mod!
Ken H.
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