Q45 swaybar

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maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

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Check with http://www.infinitipartsusa.com

Might want to read Q45tech's posts where he ways rear polyurethane link bushings bend the suspension tabs.


ponzy
Posts: 277
Joined: Mon Nov 06, 2006 6:38 pm
Car: infiniti q45

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so, it does more harm than good? i'm just intersted on improving the handling since i'll be fixing my front end in 2-3 months, i am looking into some reasonable ideas and ways while under it. max, how much do you think will it cost? any estimates on yours?

thanks for the reply.

maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

Post

About $90 for the bar from PopPop, $40 for the rubber from Joe, or even the polyurethane bushings Energy Suspension and rubber end links (for tuning) from Joe.

ponzy
Posts: 277
Joined: Mon Nov 06, 2006 6:38 pm
Car: infiniti q45

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max, q45tech suggests from his previous posts that with re: to 1994 q45 standard with 29 mm FSB: ......ifever installing a rear sway bar (20 mm) for a q45 standard you gonna have to downgrade the existing 29 mm FSB to 28 mm FSB (found in 1994 q45a / q45t) , since there are no existing 22mm RSB.

In the case of small diameter rear sway bars, the name is probably a misnomer since an EXTRA 40 pounds per inch of resistance tacked on to 123 lbs per inch SPRINGS is only 1/3 stiffer.Instead of a max of 4" of rear body roll the same G force would still roll the rear 3" with rigid bushings and 3.3" with rubber ones.What the factory does is change the existing front sway bar to a smaller size 29>28mm which increases the front sway by 13%/2 or 6.5% reducing the tire slip angle [load] on the front by roughly half that amount.The rear has less weight on the tires [they are not being overloaded like the front] so the rear bar increases the rear load by some amount and the smaller front bar decreases the front load.

The ideal situation is for all 4 tires to have the same load [weight pushing down adjusted for the differences in static weight distribution.

The Q unlike most cars has an agressive camber curve control which attempts to keep the tires [the tread part] perpendicular no matter how much the body rolls.With this taken care off by the upper links one can concentrate on balancing the load induced by turning [not really trying to minimize sway per se].

The front sway bar [is so big] to reduce the traction on the front tires making the Q progressively increase its understeer.

Wish there was another common name for sway bars which better described what we are trying to do!

ponzy
Posts: 277
Joined: Mon Nov 06, 2006 6:38 pm
Car: infiniti q45

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seems noone interested on these sway bars, anyway i've been lookin' for RSB/FSB, 20/28mm respectively, and found it on http://www.car-parts.com for $109 shipped for both of them(from whitey's wrecking located in WA). just in case anyone from here is interested.



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