Re: Where's my 60's gone?
[Re: rebel]
#2580103
11/19/18 08:12 AM
11/19/18 08:12 AM
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Joined: Mar 2006
Posts: 9,827 MI, usa
dvw
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master
Joined: Mar 2006
Posts: 9,827
MI, usa
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Is it spinning or just slower? Plenty of items to look at. Whats it weigh? My car is 3345, sometimes as much as 3465 with ballast. 1510 normally in the rear. It uses 120lb springs. I'd bet you could use 95 or 110. Doug
Last edited by dvw; 11/19/18 12:04 PM.
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Re: Where's my 60's gone?
[Re: rebel]
#2580122
11/19/18 10:51 AM
11/19/18 10:51 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Washington
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How far out and up is the IC? If it's low enough and far enough forward, you may just need to hit the tire harder.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Where's my 60's gone?
[Re: rebel]
#2580391
11/19/18 11:29 PM
11/19/18 11:29 PM
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Joined: Aug 2003
Posts: 43,129 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,129
Bend,OR USA
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How much up shock travel do you have when the car is at rest on the suspension? I was told by Avco years ago to set the ride height up so it is resting at 1/3 from being bottomed out, 2/3 up travel Can you post a video of the car leaving the starting line? That will help us help you
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Where's my 60's gone?
[Re: madscientist]
#2580471
11/20/18 02:23 AM
11/20/18 02:23 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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How far out and up is the IC? If it's low enough and far enough forward, you may just need to hit the tire harder. the IC is at floor pan level right about at the point of my knees.
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Re: Where's my 60's gone?
[Re: hugo]
#2580473
11/20/18 02:26 AM
11/20/18 02:26 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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How old and how many pases on your tires? brand new this season, about 12 passes so far.
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Re: Where's my 60's gone?
[Re: rebel]
#2580474
11/20/18 02:29 AM
11/20/18 02:29 AM
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Joined: Dec 2006
Posts: 2,106 Byron, NY
W.I.N. Racing
top fuel
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top fuel
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Posts: 2,106
Byron, NY
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What is the actual weight? At a glance Id say yes your rear springs are too stiff and your converter may be a tad tight with the reduced weight.
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: Where's my 60's gone?
[Re: Cab_Burge]
#2580475
11/20/18 02:29 AM
11/20/18 02:29 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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How much up shock travel do you have when the car is at rest on the suspension? I was told by Avco years ago to set the ride height up so it is resting at 1/3 from being bottomed out, 2/3 up travel Can you post a video of the car leaving the starting line? That will help us help you the rears are just a little over half on the wheels. I would post a pic but i'm in Facebook Jail, Solitary confinement, can't even get on to download any vids of the car. I'm doing my best seeking bail as we speak.
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Re: Where's my 60's gone?
[Re: W.I.N. Racing]
#2580476
11/20/18 02:33 AM
11/20/18 02:33 AM
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Joined: Dec 2006
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rebel
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What is the actual weight? At a glance Id say yes your rear springs are too stiff and your converter may be a tad tight with the reduced weight. 2750lb with my fat ass in the chair, the converter is a 6k stall, i rev it to 8k. But valid point as the converter was just in for a service.
Last edited by rebel; 11/20/18 02:34 AM.
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Re: Where's my 60's gone?
[Re: rebel]
#2580499
11/20/18 03:48 AM
11/20/18 03:48 AM
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Joined: Jan 2003
Posts: 9,986 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Frostbitefalls MN (Rocky&Bullw...
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What is the actual weight? At a glance Id say yes your rear springs are too stiff and your converter may be a tad tight with the reduced weight. But valid point as the converter was just in for a service. BINGO!
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Where's my 60's gone?
[Re: dvw]
#2580687
11/20/18 05:05 PM
11/20/18 05:05 PM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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What's the fall back rpm on the shift? Doug about 1600rpm
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Re: Where's my 60's gone?
[Re: rebel]
#2580688
11/20/18 05:06 PM
11/20/18 05:06 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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I'm ASSuming you are using a trans brake. If so, you can move the launch RPM up and down to see if the tire wants more hit or less hit.
I'm in the converter/IC/shock setting/launch RPM boat.
I suspect there is something in all those areas. It's almost like you aren't hitting the tire hard enough. Most guys move the IC up and back to increase the hit, but I'd rather do it with converter or shock settings.
For me, chassis tuning was always much easier if I had the IC out longer and lower than most. I could hit the tire a bunch harder with the engine/clutch that way.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Where's my 60's gone?
[Re: madscientist]
#2580715
11/20/18 05:58 PM
11/20/18 05:58 PM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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I'm ASSuming you are using a trans brake. If so, you can move the launch RPM up and down to see if the tire wants more hit or less hit.
I'm in the converter/IC/shock setting/launch RPM boat.
I suspect there is something in all those areas. It's almost like you aren't hitting the tire hard enough. Most guys move the IC up and back to increase the hit, but I'd rather do it with converter or shock settings.
For me, chassis tuning was always much easier if I had the IC out longer and lower than most. I could hit the tire a bunch harder with the engine/clutch that way. you could be onto something as most of my settings are from the heavier ladder bar car i used to have. i have the brake launch set at 4400rpm, that gave the ladder bar car the best hit for the 60's. the converter is 6k stall so maybe i'll try stepping up to 5k on the hit & see if that works. Still tryn to get out of FB jail so i can download a vid of the launch for yous.
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