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Author Topic:   Harris Pull Bar ?
FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted February 09, 2005 06:42 PM  
On the new Harris Pull Bar that came out recently does anyone know what the spring rate is? I can't remember what it was. Reese told me but I can't remember. I know it is an Eibach progressive rate but I don't know the exact rate. Anyone know?

Thanks.

HarrisMod#30
Dirt Freak

Total posts: 353
posted February 09, 2005 06:52 PM  
If i remember correctly Brett from midwest said it was a Eibach progressive rate of 200-1800. after preload its starts at 400.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted February 09, 2005 06:55 PM  
i agree i think it is a 200-1800 spring.

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted February 09, 2005 06:59 PM  
Cool, I don't have the $400 to spend on the new Harris bar right now, so what I'm going to do is get that spring and put on my Afco bar. Then later on in the season if I get the money I'll buy the Harris bar. I know it looks like a nice peice. I like how it will rotate under load. Seems that would work alot better for 4-bars due to the roll steer.

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted February 09, 2005 07:00 PM  
Also do you know what the recommended preload is on this spring?

zeroracing
Dirt Forum Champ
Total posts: 1875
posted February 09, 2005 07:52 PM  
i will find out the preload this weekend, but they say to increase it as the track drys out also.
a friend talked to harris alot obout one so i will hit him up for some info on it.

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted February 09, 2005 08:17 PM  
Thanks Zero. When you increase the preload that makes the spring a higher rate correct... I thought when the track got slick you wanted a softer rate...... I might be backwards on that though! LOL!

zeroracing
Dirt Forum Champ
Total posts: 1875
posted February 09, 2005 08:26 PM  
i think the changing the preload is a driver deal, harris told him to increase it on that bar. some guys say decrease it, kinda trial and error deal, some guys go to solid links. i think it is driver pref.

Wildside17
Dirt Maniac

Total posts: 119
posted February 09, 2005 09:21 PM  
Exactly zero, driver preference. When it gets really slick I take the preload out completely. I was thinking Reese said the eibach was like 400-1000.

Wildside17
Dirt Maniac

Total posts: 119
posted February 09, 2005 09:28 PM  
Harris recomends 1/8 inch preload

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted February 09, 2005 09:57 PM  
Thanks for all the replys! Your right on the driver preference, everything on a car is just that. My old openwheel was a metric chassis just like what I have now. I bought it used and the front springs were 1050RF 950LF and the guy ran pretty good with it and even won races. But I couldn't drive it like that, it pushed when I drove it. So I began changing front springs and by the time I got it to handling like I wanted it to, I had a pair of 550's on the front! When I put them on all the people I told about it said it would never work. But it drove better to ME than it ever had. And it never bottomed out and this was on a 1/4 mile track banked 28 degrees! I know that sounds far-fetched but I swear its the truth. I still have that chassis and those springs!

Thanks Guys!!!!

GRTWallbanger
Dirt Maniac

Total posts: 196
posted February 10, 2005 04:01 PM  
What was the major diference in those front springs?Going from 1050 & 950 down to a pair of 550 is pretty big change?Did it effect bite? side bite? body roll?What do you think the biggest difference was?

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted February 14, 2005 04:24 PM  
First of all it changed everything! The whole setup was changed when I done this but I gradually dropped the rate. Meaning I went down to an 850 - 800 then 750- 700 and so forth. The BIGGEST difference I seen was that the car was ALOT more free in the corners. It definately increased side bite. Another thing was that the previous owner had tightened down the lower control arm bolts until it squeezed the braket onto the bushings and was causing a bind. I took a porta-power and spread the open then installed bolts with lock nuts and just snugged them up. That helped alot. Also with those "light" springs it seemed to really handle the dry-slick much better. I figure because it allowed more weight to transfer quicker. I ran that setup on the track I mentioned but I also ran it on 3 other 1/4 mile tracks and those three were a variaty of bankings between about 5 to 12 degrees. It worked just fine on those tracks also and truthfully it ran better on the flat tracks!

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