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Author Topic:   Brakes on birdcage or clamped on rearend?
dawg9
Dirt Roller

Total posts: 12
posted February 11, 2005 07:37 AM  
Where should the brakes be on a 4 bar-Z link/swingarm set up with a x factor pullbar.Ive seen both ways but wondering pro and cons of each.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted February 11, 2005 07:48 AM  
This is a heated debate amoung meany racers. Here are some things to think about.
Floated
lr is most common floated on most cars
pro-takes away much of the need for a 9010, or other braking control device.
pro-can help keep the car "held up" on entry, so that the lr does not fall hard with a unsmoothdriver.
con-Your creating a chassis bind when you hold up the car, but it could be what your looking for, i mean bind the car up and it will force the car to stay more on the bars.

on my rr i run a seperate brake floater, then i can tune my entry using this seperate floater, by adjusting the angle that it is at i can tighten the entry or free it up, just the entry. it is a nice tuning tool.

my car the lr is clamped so the 9010 can take care of it, and my rr is floated on a seperate floater.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted February 11, 2005 08:05 AM  
If you want to run floated brakes do as zero said and mount them on seperate floaters. If you mount them on the birdcage with the 4-bars you lose the main benifit of floated brakes, that is you can't independently adjust them. The main reason people mount them to the same birdcage as the 4-bars is for packaging. If you want to run the brakes clamped I would consider running a 5th arm with a chain to avoid brake hop if your running alot of angle in your pull bar.

rocket36
Dirt Freak

Total posts: 209
posted February 11, 2005 11:37 AM  
i asked a very similar question to the guys at rocket chassis about our late model.
their response was, leave them clamped to the axle unless you want to tighten the car on entry, under brakes, in which case you can float the right rear caliper on the birdcage.
they usually only recommend the floated right brake on big flat 1/2 mile tracks (slick) with tight corners.
after that conversation we took our right caliper off the cage and clamped back on the tube and haven't changed since. there is usually plenty of other adjustments to tighten entry if required.

NJantz
Dirt Forum Champ
Total posts: 755
posted February 14, 2005 07:03 AM  
The points the guys previous have mentioned are good.

I always ran my RR floated on my 4/z mod. It was a great tuning device to tighten or loosen the car on entry.

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