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Air Ride Suspensions \  4 link bars

4 link bars

Air Ride Suspensions Q & A
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replies 12
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draginva   +1y
ok well im going to ask this ques. to clear up a few things for me and a friend. is there anything wrong about using the same length on the upper and lower. i got 27 in c2c bars that came off a mazda standard cab and was setup in reverse. it worked but some say it was half ass and shouldnt have worked. im going to do the same reverse but needed to know if it is safe to use same length bars. and by the way the bags will be in the bars.
chevyman992002   +1y
a reverse link will give you horrible pinion able change.
fatboysS1O   +1y
illblazer,illairgasm, one of those Canadian guys has a vid of all the 4link options. i believe one of them shows the pros and cons of shorter upper bars. double check with them though. and if i keep calling them "the Canadian guys" or their "boxes-beds" theryre gunna have me shot. other than the bed thing they seem to know their shit and their vid is pretty helpful.
sledneck91604   +1y
a reverse four link when properly set up will give you the same pinion angle change as a forward facing four link. The down fall would be during acceleration when the traction and rotation of the tire would try to pull the tire up off the road rather than pushing the tire toward the road like a forward facing four link. Hope that makes a little sense.
low mazda   +1y
Originally posted by SledNeck91604



a reverse four link when properly set up will give you the same pinion angle change as a forward facing four link. The down fall would be during acceleration when the traction and rotation of the tire would try to pull the tire up off the road rather than pushing the tire toward the road like a forward facing four link. Hope that makes a little sense.

and with all 70 hp and the weight of some 18s on a mazda, I don't see this being a big concern.
mindlissmetalfab   +1y
A reverse 4 link will maintain pinion angle if setup 'properly'. The benefits pretty much end there. Wheel hop is a concern, 70 HP or not.

Why not just run a parallel or wishbone 3 link if keeping the stock tank is a big deal?

Here's the vid.

slammedcivicsi   +1y
good vid !
draginva   +1y
well it looks to me that with a forward or reverse 4 link with equal length bars will keep pinion angle better thru out the up and down motion. as long as the pinion is set correctly the first time.
AVTekk   +1y
You might be thinking of the bars the wrong way man. You state that the bars are all the same length, but if you set a tri-4link up like that, the uppers get triangulated so the upper pounting points become closer together than the lowers, effectively making the bars "different lengths" and this will change the pinion angle throughout travel. Now if you mean the mounting points are all the same length, then that would produce upper bars longer than the lowers. Make sense?
BioMax   +1y
3-link or 4-link, reverse or forward, equal length or unequal length bars... They can all keep the pinion well within a very tollerable, useable angle as long as the system is set up properly.

And just because your truck doesn't have 500hp doesn't mean that you should give up on having a nice driving truck that can still perform well. It costs no more money to set you system up right than it does to ignore those that might have a idea about how it should work. Go out and buy the new Sport Truck and read the rear suspenion article I wrote. It answers just about all of your questions.