The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Rear 4-Link Suspension SALE!!

**robnolimit** · 11-18-2010, 07:21 PM

Well at least you'r interested. Yes, it is true, Parallel 4- bars offer no weight transfer. This comment is in referance to the upper bar vs the lower bar. Not side to side. That being said, out FatBar 4-bar kits are Not parallel. When properly set up, the lower bar should be level, and the upper bar sloping down hill (in the front) at 5 to 7 deg. This will put the instant center just ahead of the front wheel, and the rate of rise at appx. 35%. I guess I need to apologise for using the term "radial deflection" without qualifying the center or path. We use the term to describe the amount of side to side motion as the panhard rod travels up and down (the radius being the length of the panhard rod). There are many factors that relate to strength. We use the best quality components that we can. Grade-8 bolts,- (not 5 or 3 or ?) Forged thickwall stainless adjusters (not a bolt welded to a tube) and top quality urathane bushings - 85 dur., with .090 sleaves, not .060 sleaves that tend to 'oval' under load. Our bars are made from 1.25 x .090" tubing, with a 4140 thread insert, and a .188 wall DOM bushing tube. Historically our competition has used 1"x .156 wall tubing and threaded it directly. That makes our FatBars lighter and stronger than most, though some of the others are catching on. If you knew us, you would know that we are interested in helping ALL of the industry put out better products. And they have been copying us for over 20 yrs. As to the "Engineering" tag of our business, while it is true that we can't start a train, I did attend, and graduate from Cal Poly Pomona with an E/E degree, and have been studying physics and engineering as it relates to automotive performance for the last 25+ yrs. I'm not at all against defending the quality of our parts, or thier performance. We have tried to fair and professional since we opened in 1984. If you take a look at the " make it handle " thread in the suspension forum, i have been trying to answer, and bring these concepts to light. Thanks for the interest, Rob.

11-18-2010, 07:21 PM	#10
robnolimit Senior Member Join Date: Jul 2010 Location: Dandridge, Tn. USA Posts: 2,226	Re: Rear 4-Link Suspension SALE!! Well at least you'r interested. Yes, it is true, Parallel 4- bars offer no weight transfer. This comment is in referance to the upper bar vs the lower bar. Not side to side. That being said, out FatBar 4-bar kits are Not parallel. When properly set up, the lower bar should be level, and the upper bar sloping down hill (in the front) at 5 to 7 deg. This will put the instant center just ahead of the front wheel, and the rate of rise at appx. 35%. I guess I need to apologise for using the term "radial deflection" without qualifying the center or path. We use the term to describe the amount of side to side motion as the panhard rod travels up and down (the radius being the length of the panhard rod). There are many factors that relate to strength. We use the best quality components that we can. Grade-8 bolts,- (not 5 or 3 or ?) Forged thickwall stainless adjusters (not a bolt welded to a tube) and top quality urathane bushings - 85 dur., with .090 sleaves, not .060 sleaves that tend to 'oval' under load. Our bars are made from 1.25 x .090" tubing, with a 4140 thread insert, and a .188 wall DOM bushing tube. Historically our competition has used 1"x .156 wall tubing and threaded it directly. That makes our FatBars lighter and stronger than most, though some of the others are catching on. If you knew us, you would know that we are interested in helping ALL of the industry put out better products. And they have been copying us for over 20 yrs. As to the "Engineering" tag of our business, while it is true that we can't start a train, I did attend, and graduate from Cal Poly Pomona with an E/E degree, and have been studying physics and engineering as it relates to automotive performance for the last 25+ yrs. I'm not at all against defending the quality of our parts, or thier performance. We have tried to fair and professional since we opened in 1984. If you take a look at the " make it handle " thread in the suspension forum, i have been trying to answer, and bring these concepts to light. Thanks for the interest, Rob.