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Re: Critirque this launch! (video) [Re: Quicktree] #814563 09/27/10 05:12 AM 09/27/10 05:12 AM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	i can not see how the wheelie bars make the hit too hard. lowering them will not not make the problem go away, just aid(sp word) it aldough i have never worked on a car this fast with ladderbars. so maybe i should just shut up. Last edited by sshemi; 09/27/10 05:13 AM.

Re: Critirque this launch! (video) [Re: sshemi] #814564 09/27/10 07:28 AM 09/27/10 07:28 AM
Joined: Feb 2004 Posts: 6,257 acworth / N. georgia - south e... cheapstreetdustr master
cheapstreetdustr master Joined: Feb 2004 Posts: 6,257 acworth / N. georgia - south e...	Quote: i can not see how the wheelie bars make the hit too hard. lowering them will not not make the problem go away, just aid(sp word) it aldough i have never worked on a car this fast with ladderbars. so maybe i should just shut up. they dont make the "hit to hard" The timing of when they hit ...is wrong. .and the amount of leverage that's interupted when they hit is too much.. it is upsetting whats goin on... it needs a tad softer compression settings in the shock..i suspect ditto on rebound... it needs to apply the wheelie bars sooner and more gradually... just my opinion. cheapst 365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured [image][/image]

Re: Critirque this launch! (video) [Re: cheapstreetdustr] #814565 09/27/10 07:49 AM 09/27/10 07:49 AM
Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw... gregsdart OP I Live Here
gregsdart OP I Live Here Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw...	Quote: Quote: i can not see how the wheelie bars make the hit too hard. lowering them will not not make the problem go away, just aid(sp word) it aldough i have never worked on a car this fast with ladderbars. so maybe i should just shut up. they dont make the "hit to hard" the timing of when they hit ...is wrong. and the amount of leverage that's interupted when they hit is too much.. it is upsetting whats goin on... cheapst I agree. That is why at this point they are as high as I am willing to run them. They allow a two foot wheel stand as it is. Too much leverage with a 30 inch ladder bar has led to very high shock settings. Another problem, and one not easily solved is the height of the Center of gravity. I believe too high of a c/g creates a situation where the front of the car can rise too quickly and is hard to slow down without upsetting weight transfer. If I could lower the back of the car, I would, but the tubs hit the tires as it is. The car looks to be too high down track also. I can keep limiting the front travel a touch at a time, and maybe that will improve things. 8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky

Re: Critirque this launch! (video) [Re: gregsdart] #814566 09/27/10 07:54 AM 09/27/10 07:54 AM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	can you raise the instant center?

Re: Critirque this launch! (video) [Re: sshemi] #814567 09/27/10 08:05 AM 09/27/10 08:05 AM
Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw... gregsdart OP I Live Here
gregsdart OP I Live Here Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw...	Raising the instant center would increase leverage, which looks to be the wrong direction. I have plenty of hit now. Actually If I could lower it without upsetting the speed of front end rise, I would. But in the past lowering the ladder bar increased the speed that the front would rise to the point it changed where it left the beams. I was almost leaving vertically, and had a .02 change in vehicle reaction time. 8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky

Re: Critirque this launch! (video) [Re: gregsdart] #814568 09/27/10 10:49 AM 09/27/10 10:49 AM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	can you raise the ladderbars one hole? where are they now? Last edited by sshemi; 09/27/10 10:50 AM.

Re: Critirque this launch! (video) [Re: sshemi] #814569 09/27/10 11:16 AM 09/27/10 11:16 AM
Joined: Sep 2010 Posts: 40 Woodburn,OR W Womanator member
Womanator member W Joined: Sep 2010 Posts: 40 Woodburn,OR	Just watched your video about 10 times. Watching the start. You are spinning off the start and hitting the bars and then getting traction and hitting them again. If you hold traction your front end won't come down as hard.Instead you will carry it. I would lower the tire pressure 1/4 lb at a time till you stop your tire spin. Get a digital gauge.

Re: Critirque this launch! (video) [Re: Womanator] #814570 09/27/10 03:45 PM 09/27/10 03:45 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	where's Monte when you need him?

Re: Critirque this launch! (video) [Re: Quicktree] #814571 09/27/10 04:22 PM 09/27/10 04:22 PM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	i take that back about raising the bars. just realized you cant move the ic forward without moving it too much upward. Can you move some weight around? Last edited by sshemi; 09/27/10 04:28 PM.

Re: Critirque this launch! (video) [Re: sshemi] #814572 09/27/10 04:40 PM 09/27/10 04:40 PM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	i guess only thing to do when you cant move the ic to where you want it is to move weight around wich relocates the center of gravity and helps the rotational torque. I realy think your car needs fourlink.

Re: Critirque this launch! (video) [Re: sshemi] #814573 09/27/10 04:52 PM 09/27/10 04:52 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	Quote: I realy think your car needs fourlink.

Re: Critirque this launch! (video) [Re: Quicktree] #814574 09/27/10 07:23 PM 09/27/10 07:23 PM
Joined: Mar 2005 Posts: 3,032 NY B B1duster master
B1duster master B Joined: Mar 2005 Posts: 3,032 NY	Are there travel limiters up front ?

Re: Critirque this launch! (video) [Re: B1duster] #814575 09/27/10 07:44 PM 09/27/10 07:44 PM
Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw... gregsdart OP I Live Here
gregsdart OP I Live Here Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw...	I do have travel limiters. I plan on slowing the front down with shock and by limiting total travel on the limiter, both a little at a time. 8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky

Re: Critirque this launch! (video) [Re: gregsdart] #814576 09/27/10 07:55 PM 09/27/10 07:55 PM
Joined: Mar 2005 Posts: 3,032 NY B B1duster master
B1duster master B Joined: Mar 2005 Posts: 3,032 NY	I had the same bounce with my old duster, ladder bar also. I made limiters that kept the front tires at ride height. It still carried the frontend way out and came down smooth. No more big wheelstands and it went 1.25 60ft 8.90. The car had old steel konis out back and old 90/10s up front

Re: Critirque this launch! (video) [Re: B1duster] #814577 09/27/10 09:37 PM 09/27/10 09:37 PM
Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw... gregsdart OP I Live Here
gregsdart OP I Live Here Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw...	I remember having set the compression settings up front real stiff due to much higher wheel stands before. I think all I need to do is soften the shocks a bit. I bet its bouncing off the tires. 8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky

Re: Critirque this launch! (video) [Re: gregsdart] #814578 09/27/10 10:54 PM 09/27/10 10:54 PM
Joined: Aug 2006 Posts: 105 ontario Clockwork member
Clockwork member Joined: Aug 2006 Posts: 105 ontario	Nice car! Try a little more pressure in the rear tires? 572ci B1 7.90 172MPH

Re: Critirque this launch! (video) [Re: Clockwork] #814579 09/28/10 04:45 AM 09/28/10 04:45 AM
Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw... gregsdart OP I Live Here
gregsdart OP I Live Here Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw...	I keep increasing tire pressure each pass, in very small increments. At 9.5 psi now up from 8.75, will keep going till it starts to spin or gets inconsistent. 8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky

Re: Critirque this launch! (video) [Re: gregsdart] #814580 09/28/10 09:44 AM 09/28/10 09:44 AM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	EVERYONE HERE RUNNING MID 8'S ON LADDER BARS PLEASE FORM A LINE ON THE RIGHT. I just about have any front end travel. your rear shocks are way too stiff for compression I have mine 2 clicks from dead soft. rebound in the middle. wheelie bars 4". those tires were 14x32's and sidewalls were beat. I changed to 33x10.5W's and now 1.22 60's 1.26 60's VIDEO home of the Sox and Martin Hemi Duster

Re: Critirque this launch! (video) [Re: HEMIFRED] #814581 09/28/10 10:14 AM 09/28/10 10:14 AM
Joined: Feb 2003 Posts: 4,953 Houston, Texas TheOtherDodge master
TheOtherDodge master Joined: Feb 2003 Posts: 4,953 Houston, Texas	Sofen the hit, slow down the front a tad and get longer wheelie bars! I have seen a few friends of mine who went to longer bars to really "calm" a wheel stand.

Re: Critirque this launch! (video) [Re: HEMIFRED] #814582 09/28/10 10:19 AM 09/28/10 10:19 AM
Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw... gregsdart OP I Live Here
gregsdart OP I Live Here Joined: Jan 2003 Posts: 10,147 Frostbitefalls MN (Rocky&Bullw...	Fred, with a little imagination, it looks Like i was in the other lane How fast was that pass? Last edited by gregsdart; 09/28/10 10:21 AM. 8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky

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