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Author Topic:   buscuit or spring pull bar
eagleeye
Dirt Newbie

Total posts: 2
posted August 03, 2002 09:30 AM
I have always run a biscuit bar, but have decided to try a spring loaded bar. I am going to try hypercoils 600-1200 progressive. I have a two link car. Just curious of what I should expect for change?

duke
Dirt Newbie

Total posts: 4
posted August 04, 2002 11:46 PM
I had an afco pull bar that came with the progressive spring and didn't like it. Had to preload the heck out of the spring to get the car to pull hard off the corner. The travel was about 3.5 in. We ended up with a 900# spring no preload,1.5 to 2 in. But the progressive might work for you. I think it depends on what agrees with your right foot?

2nd2none
Dirt Maniac

Total posts: 193
posted August 05, 2002 02:49 PM
i switched from a short afco pullbar with 1200/600 progressive spring to a solid bar. Doubt i ever go back to the spring bar. Dont have any problems with not getting enough forward bite, sometimes i wish i could get rid of forward bite it hooks up so hard.

dirtracer14
Dirt Freak

Total posts: 333
posted August 05, 2002 04:48 PM UIN: 23443678
I really like my rubber bar over the spring bars also. It will hook so hard we really have to watch how much angle we put in it.

WPP
Dirt Maniac

Total posts: 162
posted August 06, 2002 07:15 PM
When you guys say you are running a solid bar is it just a bar with nothing i have never tried this would it work with a swingarm. Its looks like you could blow the tires off if you get in the throttle too hard if you guye don't mind give me some feed back on this on what kind of angle to run and how much wrap up you will get

WPP
Dirt Maniac

Total posts: 162
posted August 06, 2002 07:17 PM
When you guys say you are running a solid bar is it just a bar with nothing i have never tried this would it work with a swingarm. Its looks like you could blow the tires off if you get in the throttle too hard if you guye don't mind give me some feed back on this on what kind of angle to run and how much wrap up you will get

WPP
Dirt Maniac

Total posts: 162
posted August 07, 2002 08:36 PM
Sorry for the double post were is the feed back on this solid bar i would like to try it this weekend need some help here

CUSTOMPERFORMANCE
Dirt Freak

Total posts: 464
posted August 07, 2002 08:38 PM
The only time i could get a solid top link to work on one of my cars is when the track was tacky all nite cause as soon as it went slick i was burnign the tires and would get beat bad. Not saying it cant work but it didnt work for me.

2nd2none
Dirt Maniac

Total posts: 193
posted August 07, 2002 10:35 PM
our track is usually dry in heats and rubbered up come features. When i put the solid bar on i noticed a huge difference on forward bite, it was nothing but forward bite even on the dry/slick. 3 link with LR behind, RR infront. when the track gets rubber it lifts the rearend WAY up and is completely hooked all the way down the shoot.

ford5
Dirt Freak

Total posts: 221
posted August 08, 2002 07:30 AM
last year we had a swing arm car and started the year off with a lift arm/5th coil, no luck , then switched to a solid pullbar and got a huge amount more forward bite..............did not run much angle in it tho... almost level to no more than 10 degrees downward, BTW i think the Larson cars all have a solid pullbar, at least that is where i seen one and got the idea.

24mod
Dirt Roller

Total posts: 5
posted August 08, 2002 01:41 PM
I race in N. Louisiana and the tracks are always dry slick. I run a solid pull bar on my swing arm car and love it. It has more forward bite than anything else. Always predictable, and never have to worry about binding or any other malfunctions like that.

fast19
Dirt Roller

Total posts: 24
posted August 08, 2002 03:16 PM
Hey 2nd to none!
If I could pick your brain a little I would sure appreciate it!
When you say LR behind, do you mean spring, shock or both? I am setting a mod up for next year here in Illinois and have run a similar settup in the past. Do you have the trailing arms at axle centerline and what kinds of length and angles on all three bars?

Thanks!
19

WPP
Dirt Maniac

Total posts: 162
posted August 09, 2002 05:09 AM
Thanks for the information guyson the swingarm is this bar just a bar hemis on each end i don't guess i have ever seen one

24mod
Dirt Roller

Total posts: 5
posted August 09, 2002 02:35 PM
Yea, its a solid steel swedge tube with heims on both ends. Mine is about 25 inches and run about 18 degrees in it. I get more bite and lift in the car than any other, plus it only cost you about 35 dollars to replace the whole thing!

Azrace
Dirt Roller

Total posts: 21
posted August 09, 2002 03:36 PM
Hey 24mod, Is your car a 3 link swingarm with solid trailing arm mounts or a z-link with floated birdcages?

WPP
Dirt Maniac

Total posts: 162
posted August 10, 2002 01:23 AM
DO you guys run this bar toward the left or right in the the center of the rearend

cd2
Dirt Roller

Total posts: 15
posted August 10, 2002 09:32 AM
I started working with spring pull bars back when Rayburn first used them.This is what i have found to work for us.With the solid bar we had good bite but you had to be really smooth getting in or you would break the tires loose .When you got it gathered up you could stand on the gas and get great forward bite.What i discovered was the rear end was trying too lift on decell. With it mounted down at fromt it lifted on chassis for forward bite and lifted on rearend on decell.giving a polevalt effect.Changed to a spring bar and had to work with it a race or two but got great results.The main thing is i use a spring that only compresses about 1/2".Have worked with center mounting to three inches toward left rear.Diffrent angles,heights from axel center to bar heght and how far back of axel center you mount bar is very important.The main thing is not to let the pull bar lift the rearend on decell.This is on a three link with both springs mounted behind rear.Going To put front mount on L.R. and try that also.On a fixed mount two lower this is better for foward bite. cd2

2nd2none
Dirt Maniac

Total posts: 193
posted August 10, 2002 04:38 PM
quote:
Originally posted by fast19:
Hey 2nd to none!
If I could pick your brain a little I would sure appreciate it!
When you say LR behind, do you mean spring, shock or both? I am setting a mod up for next year here in Illinois and have run a similar settup in the past. Do you have the trailing arms at axle centerline and what kinds of length and angles on all three bars?

Thanks!
19


The LR is behind on slider, shock infront, RR spring infront shock behind, The trailing arms are about 21" or so, 18" tubes, i run both bars in top hole and they are centerline on the rearend mount. The trailing arms are about 10 degrees uphill, the solid pull bar is about 20 degrees downhill with 12 degrees of pinion angle. Need any more info let me know

24mod
Dirt Roller

Total posts: 5
posted August 12, 2002 11:19 AM
My car is a 2-link swing arm with clamped brackets on the housing. I run a short left side arm and a long right side with both mounted as high as they can go. The great thing with a solid pull bar is you take all the guess work and malfunctions out of the eguation. There are several accomplished racers throughout this area who swear by the solid bar. Look at a Larson, this is one of the better cars around and only come with a solid bar, not to mention some of the other less know builders who run a solid bar on their cars. Just put your desired bar angle in it, also you can run more pinion angle since you are on a solid and go race it.

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