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Author Topic:   straight bar centered below pinion
rpm20
Dirt Freak

Total posts: 338
posted April 29, 2005 04:22 AM  

have any of you guys tried the straight panhard bar that mounts directly centered below the pinion and goes to the left side frame.
was thinking about trying it out in our next test session on tues but it seems like the rear roll center would be .....very....low
i had a guy at a local trade show tell me that it really hooks up good.......maybe its only good on dry?
some real world experience with this would be helpful. my car is pushy bad already but i was thinkin..........again

NJantz
Dirt Forum Champ
Total posts: 755
posted April 29, 2005 06:04 AM  
I ran it with a 4/z on a dry slick 1/4mile track. Loved it. YOu don't need very much angle in it. Really helped hook the car up. Everyone thought I was crazy for even trying it.

rpm20
Dirt Freak

Total posts: 338
posted April 29, 2005 06:09 AM  
njantz.....how much angle did you run and have you tried more.....what were the results??

36modracer
Dirt Maniac

Total posts: 126
posted April 29, 2005 08:12 AM  
we did that last year with our grt mod and the straight bar made a huge difference on bite. we had the bar just a couple inches higher on the chassis side. I want to say 3 inches exactly but dont take it for that. we tried raising more but it made it not as good so id say 2-3 inches higher at chassis would be a good point to start. our car was a swingarm but we removed the lr bar and locked it down then put the straight bar on instead of jbar. was like a different car for sure.

Ego Racing
Dirt Forum Champ
Total posts: 724
posted April 29, 2005 08:48 AM  
In our LM we run a straight bar most of the time and even on tracks where most will tell you that it cannot be done. We have found that the biggest thing is the amount of bite you set the car up with. We run it in a 4 link car and set it up with 20-75lbs of bite depending on the track. The lower amout of bite really helps a limited or smaller motor as the rearend seems to load better all around the track and it seems more forgiving if you get out of the "best" line around the track.

rpm20
Dirt Freak

Total posts: 338
posted April 29, 2005 09:14 AM  
is this straight bar mounted in the center of the pinion plate directly below the pinion or is it to the left of the pinion,?
i used the one to the left last year and liked it but rules changed and prompted me to go centered under the pinion now to maintain the imca mandated 19" or better length.

quote:
Originally posted by Ego Racing:
In our LM we run a straight bar most of the time and even on tracks where most will tell you that it cannot be done. We have found that the biggest thing is the amount of bite you set the car up with. We run it in a 4 link car and set it up with 20-75lbs of bite depending on the track. The lower amout of bite really helps a limited or smaller motor as the rearend seems to load better all around the track and it seems more forgiving if you get out of the "best" line around the track.


zeroracing
Dirt Forum Champ
Total posts: 1875
posted April 29, 2005 09:18 AM  
I talked udeccide66 into running this last year, he liked it i think. i am going to get one in a week or two and try it out also, the super lower mount should really help a car plant and go on slick.

Ego Racing
Dirt Forum Champ
Total posts: 724
posted April 29, 2005 09:25 AM  
We went to a track where they were running a minimum bar length rule. We turned our frame mount over and ran the straight bar to the outside of the chassis bar and got 19 inches that way.

rpm20
Dirt Freak

Total posts: 338
posted April 29, 2005 09:31 AM  
i am already there just to get the 19" and still needed to put a hole centered under the pinion to get what i was going to try.

quote:
Originally posted by Ego Racing:
We went to a track where they were running a minimum bar length rule. We turned our frame mount over and ran the straight bar to the outside of the chassis bar and got 19 inches that way.


rpm20
Dirt Freak

Total posts: 338
posted April 29, 2005 01:35 PM  
anyone else ever try any unusual panhard ber locations or configurations???

leapinlizard
Dirt Freak

Total posts: 402
posted April 29, 2005 02:29 PM  
In our limited experiance with a striaght bar mouted in the center below the ring gear, It seems we do much better with forward bite then those with straight bars and mounted next the pinion. I also found that very little adjustment is needed to stay in the ballpark. Fine tuning is a matter of a 1/4 inch frame side.

rpm20
Dirt Freak

Total posts: 338
posted May 02, 2005 05:49 AM  
lots of good information guys...keep it comin

looks like practice tomorrow night might be on the ice........its cold in wis.
should be a high of 60

[This message has been edited by rpm20 (edited May 03, 2005).]

Ego Racing
Dirt Forum Champ
Total posts: 724
posted May 02, 2005 09:16 AM  
quote:
Originally posted by rpm20:
lots of good information guys...keep it comin

looks like practice tomorrow night might be on the ice........its cold in wis.


What part of Wis.?

rpm20
Dirt Freak

Total posts: 338
posted May 02, 2005 09:34 AM  
oshkosh, powercom speedzone

quote:
Originally posted by Ego Racing:
What part of Wis.?


rpm20
Dirt Freak

Total posts: 338
posted May 03, 2005 08:30 AM  
i have , since posting this....had guys tell me that this setup actually works better than the shorty bar.......why do you suppose that is? would it be more equal loading of the rear tires over say.....a shorty bar or j bar?
even though it is a much lower roll center they say it really isnt as tight as you would think.

happy
Dirt Full Roller

Total posts: 73
posted May 03, 2005 11:56 AM  
We run a 4 bar with the option of a 4-Z, have tried running short bar but seems very eratic on the small 1\4 mile track that we run, we are currently running a "J", those of you that have run this type straight bar set up do you think it would be a better option over the short bar and can you give me more information as to exactly how you are running it?

A&M Motorsports
Dirt Maniac

Total posts: 117
posted May 03, 2005 12:12 PM  
Where can I buy the pinion bracket to mount the p/h bar under the pinion?

------------------
Artie Perilloux
A & M Motorsports

rpm20
Dirt Freak

Total posts: 338
posted May 03, 2005 12:45 PM  
we took the 2 sided speedway mount and bridged the bottom then drilled the center hole. works great

quote:
Originally posted by A&M Motorsports:
Where can I buy the pinion bracket to mount the p/h bar under the pinion?



Kromulous
Dirt Forum Champ
Total posts: 796
posted May 03, 2005 01:01 PM  
AFCO, has a new one, double sided and the bottom hole, $36.00 bucks i believe.

A&M Motorsports
Dirt Maniac

Total posts: 117
posted May 03, 2005 01:23 PM  
quote:
Originally posted by rpm20:
we took the 2 sided speedway mount and bridged the bottom then drilled the center hole. works great


Just so happens I have the skills to make what you just described. One question, how far below the centerline of the pinion did you drill the hole?

------------------
Artie Perilloux
A & M Motorsports

Kromulous
Dirt Forum Champ
Total posts: 796
posted May 03, 2005 02:28 PM  
Link to the AFCO one:
http://www.secureperformanceorder.com/afcostore/getproduct.cfm?CategoryID=14&ClassID=184&SubclassID=878&ProductID=5037

WaterJaw
Dirt Roller

Total posts: 14
posted May 04, 2005 03:07 PM  
Were you clamped up on the LR or floated with the spring behind?

udecide66
Dirt Freak

Total posts: 229
posted May 05, 2005 03:04 PM  
We just changed our mod over to the straight panhard bar mounted below the pinion from a J-Bar. We ran this same bar last year in our old Modified, it helped that car a whole bunch.
This year we tried it to simply get the car to roll over, I had tried eveything else with the J-bar but just couldn't get the car to roll over.
Now with the straight bar to the center of pinion and below it, I have about 6" of rake and the car rolls real nice with a lot of side bite in the corners.
one problem with it is when the car does roll over it tends to pull the rear end to the left quite a bit more than a J-bar, I think my next thing to try is a rear mount Panhard bar.

andykmod
Dirt Freak

Total posts: 351
posted May 06, 2005 07:55 AM  
I think if i would try this set-up i would tip over. Roll center would be very low.

JT54
Dirt Maniac

Total posts: 170
posted May 06, 2005 10:27 AM  
what affect does running the streght bar level as apposed to having rake in it?....my car is always tight getting in and through the middle with my shorty bar with about 31/2 to 4 inches rake ,...I am in the top whole on the pinion and can come down about 11/2 inches on the frame side .....what affect would this have?

washeduptoo
Dirt Maniac

Total posts: 155
posted May 09, 2005 07:26 PM  
We bought the new bracket from AFCO and tried it Sat. night and had it up on the frame about 3 inches. It reacted a whole lot quicker, but we still didn't have any side bit on our 4-z. The car is really fast on tacky track, but when it dries out, we go toward the back. The driver says it feels like it is in a 4 wheel drift. Anyone have any thoughts?

25bmod
Dirt Newbie

Total posts: 3
posted May 10, 2005 09:45 PM  
i run a b-mod (limited mod) on mainly 3/8 semi- banked. i run a 10 in. panhard bar left side of rear pinion and at about a 28 deg. angle. have all kinds of bite and car is extremly responsive. everyone i talked with said it was too much angle and would make the car to eratic but works extremey well on tacky or dry slick tracks

25bmod
Dirt Newbie

Total posts: 3
posted May 10, 2005 09:49 PM  
i run a b-mod (limited mod) on mainly 3/8 semi- banked. i run a 10 in. panhard bar left side of rear pinion and at about a 28 deg. angle. have all kinds of bite and car is extremly responsive. everyone i talked with said it was too much angle and would make the car to eratic but works extremey well on tacky or dry slick tracks

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