Welcome, Guest. Please login or register.
December 02, 2008, 10:06:48 PM

Login with username, password and session length

Visit ReillyMotorSports
* Home Help Search Memberlist gallery Login Register
+  The BigBlockDart Message Board
|-+  Technical
| |-+  Chassis, Suspension
| | |-+  Ladder bar adjustment?? To calm down wheelies..
Pages: [1] Go Down Print
Author Topic: Ladder bar adjustment?? To calm down wheelies..  (Read 485 times)
Dartsport
BBD God
*****
Offline Offline

Posts: 2429


Ringtown, Pa 489 posts on old site


Email
Ladder bar adjustment?? To calm down wheelies..
« on: May 25, 2006, 03:14:51 PM »

I posted this ?? in the off topic furum also..   My ladder bar has 2 holes in the front. I have front of ladder bar in lower hole. This spring I installed a 505 motor, more power than last year. Now I am pulling 3" wheelies, out past the 60' box. The car is consistent this way. But I would like to calm it down. Last year with smaller motor, I pulled the wheels about 6" to 12" high, and only carried them about 15 - 20' . I am not damaging any parts yet. I only have 3" of front end travel, and 3" under front fenders. Most of the time it sets the front end down nicely. The front end is coming up on the wheelie bars, and then spinning some , while it is up around 3'. If I bring the wheelie bars down any lower, it uloads the tires more and spins more. If I raise the wheelie bars any, then the front end just goes higher. Last weekend my 60's were , 1.283 , 1.282 , 1.282 , and a 1.283 with the rear tires. If I raise the front of the ladder bars, will it calm down the wheelies to a little less heigth??
Logged

505 cu. in. , Alston chassis, CRT trans, FBO Ignition,  9.451et, 141.91mph, 1.278 - 60 foot, SO FAR!!
Steve DeTar
Guest


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #1 on: May 25, 2006, 06:05:56 PM »

What's your pinion angle?
Logged
Ciscodog
Guest


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #2 on: May 25, 2006, 07:03:04 PM »

Moving it up in the front makes it hit harder.  Probably won't help your problem.
Logged
Dartsport
BBD God
*****
Offline Offline

Posts: 2429


Ringtown, Pa 489 posts on old site


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #3 on: May 25, 2006, 08:46:22 PM »

What's your pinion angle?
  Don't remember, I haven't checked it in 2 years. I think it was 2* . I didn't have any trouble with to big of wheelies untill this spring , when I put the new motor in.
Logged

505 cu. in. , Alston chassis, CRT trans, FBO Ignition,  9.451et, 141.91mph, 1.278 - 60 foot, SO FAR!!
Dartsport
BBD God
*****
Offline Offline

Posts: 2429


Ringtown, Pa 489 posts on old site


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #4 on: May 25, 2006, 08:49:30 PM »

Moving it up in the front makes it hit harder.  Probably won't help your problem.
I was told , that moving the front bar up, it will hit the tires harder, but that it will also move the instant center back. So it wouldn't have the leverage to lift the front end as much. (This is just what i have heard.) I haven't read it any where, that is why I am asking.
Logged

505 cu. in. , Alston chassis, CRT trans, FBO Ignition,  9.451et, 141.91mph, 1.278 - 60 foot, SO FAR!!
Ciscodog
Guest


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #5 on: May 25, 2006, 10:23:31 PM »

Send AAOUTLAW an IM and ask him this question.  He builds chassis for a living, and he's the one that told me all about this.  I even double checked it because this topic came up a few months back.
Logged
bOb shingler
BBD God
*****
Offline Offline

Posts: 2926

lake worth, florida

55robert@comcast.net
Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #6 on: May 25, 2006, 10:49:34 PM »

try 50-100lbs of ballast way out front or launch at a lower rpm or drill another hole lower.
Logged

"bOb Built" (no matter how many times it takes) lol
Dartsport
BBD God
*****
Offline Offline

Posts: 2429


Ringtown, Pa 489 posts on old site


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #7 on: May 26, 2006, 07:57:30 AM »

Send AAOUTLAW an IM and ask him this question.  He builds chassis for a living, and he's the one that told me all about this.  I even double checked it because this topic came up a few months back.
  Thanks, I sent him an email. His PM box is full..   THanks!!!
Logged

505 cu. in. , Alston chassis, CRT trans, FBO Ignition,  9.451et, 141.91mph, 1.278 - 60 foot, SO FAR!!
rpmrich
Full Member
***
Offline Offline

Posts: 232


i dont burn rubber, i make tires scream


Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #8 on: May 26, 2006, 10:33:13 PM »

moving the ladder bar's up will increase the persentage of rise. the car will wheel stand more. it also moves the instant center forward. thats why it stands up more.
move the bars down 1 hole it will decrease the persentage of rise by i think 15% to 20% each hole you drop it. if you go too far your 60 ft times will drop from tire spin,  drag tree
Logged
Midnight Special
Sr. Member
****
Offline Offline

Posts: 609


GO HARD or GO HOME

midnightsplracin
WWW Email
Re: Ladder bar adjustment?? To calm down wheelies..
« Reply #9 on: May 26, 2006, 10:52:38 PM »

My question is are your ladderbars adjustable 3 ways.  I can adjust mine from an expandable adjuster on the top side. bottom side and then the front.  Then I have 5 holes for the up/down. 
Logged


The MIDNIGHT SPECIAL RACING Family
Wichita Kansas Area
NHRA/SFI Tech Inspector
NHRA Division V
Pages: [1] Go Up Print 
Jump to:  

Powered by MySQL Powered by PHP The BigBlockDart Message Board | Powered by SMF 1.0.5.
© 2001-2005, Lewis Media. All Rights Reserved.
Valid XHTML 1.0! Valid CSS!