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A friend of mine had a ladder bar set up that located under the front seat on his 69 chevell, ran 8.80's at 150plus . Now has a four link that doesn't hook as good.

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The shorter the bar the harder the hit on the rear tires, the longer the bar, the softer the hit.

A 4 link is essentially an infinately adjustable ladder bar that allows you to set the intersect point and height almost anywhere.

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so Richard, a longer bar will hit softer,Is that bad?
is that easier on parts?
do I want a hard hit on the tires?
say I run a 48" long bar will I be able to get them to work with a 12"x29"tire with a 600hp,2900#,101 wb car????

or should I just go with a 30-32" bar???

sorry for all the questions but I don't want to have to redo the car when its done Ron...


anyone else have an opinion on long bars?

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I'm going with about 40 inch bars in my Anglia. 90 inch WB.

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thats just under 1/2 the wheelbase, I have been thinking about making mine 48"
a guy over on the hamb board has 48" bars and says they hook hard Ron...

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I'm going with about 40 inch bars in my Anglia. 90 inch WB.

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thats just under 1/2 the wheelbase, I have been thinking about making mine 48"
a guy over on the hamb board has 48" bars and says they hook hard Ron...

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If you can figure out the CG(center of gravity) of
the car you want to pick up at that point... if you
go forward of that point it will try to lift the front
(wheel stand)

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Guys are ladder bars considered "traction bars" in the eyes of IHRA/NHRA techs?

Reason I ask is because I seem to remember seeing in the IHRA rule book that traction bars can be no longer than half the cars wheelbase. Perhaps they mean the "slapper bar" type. Hopefully it doesn't pertain to you Ron, but something to consider maybe.

Anyhow, cool project as usual

codfish

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the willys will have a 101" WB so a 48" bar should be OK as that is less than half the WB.


I have a set of 30" bars but I wanted this car to have more of a 60"s style look to it and still hook up.

talking to some of the gasser guys on the Hamb board it looks like they are hooking up just fine with 48" bars,
I just wanted to make sure I didn't make this car not work because I went with long bars...


If I could run like this car, wheels up, run straight and run low 10's, I would be happy Ron...

check it out here:
http://www.youtube.com/watch?v=wlRSb_EJ0o4&feature=player_embedded
.

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If you can figure out the CG(center of gravity) of
the car you want to pick up at that point... if you
go forward of that point it will try to lift the front
(wheel stand)

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If you can figure out the CG(center of gravity) of
the car you want to pick up at that point... if you
go forward of that point it will try to lift the front
(wheel stand)

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Not quite. Because of the weight transfer during acceleration, it doesn't quite work that way.

If you were to draw a horizontal line from the CG forward, and draw a vertical line from the tire straight up, you will have an point at the intersection. Draw a line from the rear tire contact point through the ladder bar mount. If that line intersects the CG/Front tire point, then the body roll will be neutral.

However if the car is accelerating hard enough, it can still wheelstand (if it hooks).

This is a VERY good website of explination (although it's pretty complicated)

The first page has a lot of ladder bar info on it.

http://www.racetec.cc/shope/

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