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AFCO DOUBLE SETTINGS
#1646870
07/15/14 01:14 PM
07/15/14 01:14 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
OP
master
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OP
master
Joined: May 2004
Posts: 3,210
robin hood country
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Just wondered what others were setting these at.
I've got mine at 8 from full tight on comp and 13 from full tight on rebound. This was on a reasonable track with SS springs and calvert 90/10 fronts. Ran a best 1.41 at 10.26 on a fairly warm day.
I'd like to get into consistent 1.30's if i could, so any and all advice is welcome.
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: AFCO DOUBLE SETTINGS
[Re: deaks]
#1646871
07/15/14 03:02 PM
07/15/14 03:02 PM
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Joined: Aug 2007
Posts: 2,224
Arlington, Tx.
BJS racing
top fuel
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top fuel
Joined: Aug 2007
Posts: 2,224
Arlington, Tx.
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It is literally all about your car and what it wants. No one else's car is going to have the exact same settings as your would. The shock settings in many cars that do enough testing and racing might have a setting for a certain track at a certain time of the day and change later in the day or when they go to another track. I've worked on cars where I changed the shock setting every pass. You have to play with them and see what the car does and see what it likes. It will be a totally different set up on a ladder bar then a 4 link.
Back in the swing of things at Painless again! Great to be back!
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Re: AFCO DOUBLE SETTINGS
[Re: BJS racing]
#1646872
07/15/14 03:10 PM
07/15/14 03:10 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
It is literally all about your car and what it wants. No one else's car is going to have the exact same settings as your would. The shock settings in many cars that do enough testing and racing might have a setting for a certain track at a certain time of the day and change later in the day or when they go to another track. I've worked on cars where I changed the shock setting every pass. You have to play with them and see what the car does and see what it likes. It will be a totally different set up on a ladder bar then a 4 link.
 .. just different weights and torque will
be way different on settings let alone the type of
suspension
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Re: AFCO DOUBLE SETTINGS
[Re: MR_P_BODY]
#1646873
07/15/14 05:02 PM
07/15/14 05:02 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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OP
master
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robin hood country
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I just thought someone might chime in with a similar set up. I've read stuff on the net, where people are running the comp on full tight and the extension really loose. My old 9 way ranchos were simple, most of the time they were on either 8 or 9.
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: AFCO DOUBLE SETTINGS
[Re: toddd]
#1646876
07/16/14 01:01 AM
07/16/14 01:01 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Get someone to vid your launch and post the vid.
This is a very good way to see what is REALLY happening
and not just a guess
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Re: AFCO DOUBLE SETTINGS
[Re: MR_P_BODY]
#1646877
07/16/14 09:03 AM
07/16/14 09:03 AM
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Joined: Jan 2003
Posts: 9,985
Frostbitefalls MN (Rocky&Bullw...
gregsdart
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master
Joined: Jan 2003
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Frostbitefalls MN (Rocky&Bullw...
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How consistent are the 60 fts? If they are real close, your shock settings might be very close. If they are all over the place, like more than .01 or .02 apart, then due to the SS springs I would start at full tight on extension and see if it hooks at the hit. You need video to watch, and go frame by frame to see what is happening. If it hooks well at the hit but spins later, you might still not have enough shock control for the high leverage of the SS springs. If it spins, then hooks, start loosening them.
What does the rear shackle angle and length look like? If they are long, and angled at a 45 degree angle toward the rear, they will really increase the separation at the hit.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: AFCO DOUBLE SETTINGS
[Re: gregsdart]
#1646878
07/16/14 12:54 PM
07/16/14 12:54 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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Joined: May 2004
Posts: 3,210
robin hood country
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They vary more than that, leaf springs are clamped on the front, factory shackles angled as per the mopar manuals. I have just recently moved the shocks in front of the axle and vertical. I tightened the extension and comp 4 clicks on sunday and went from 1.43 to 1.41.
Why do you say full tight on ext and what would you do with the comp with that setting ?
I thought the looser the ext, the tighter the comp to keep the tyres planted.
Thanks Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: AFCO DOUBLE SETTINGS
[Re: deaks]
#1646882
07/16/14 02:12 PM
07/16/14 02:12 PM
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Joined: Aug 2007
Posts: 2,224
Arlington, Tx.
BJS racing
top fuel
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top fuel
Joined: Aug 2007
Posts: 2,224
Arlington, Tx.
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What torsion bars and shocks do you have up front? Looks to me like you could use a little loser front end to help pitch rotate the car (weight transfer). The tire is spinning then hooking from what I could tell. Very nice car by the way! I would loosen the extension on the rear shocks and leave the compression and see what that does. What RPM are you leaving at?
Back in the swing of things at Painless again! Great to be back!
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Re: AFCO DOUBLE SETTINGS
[Re: BJS racing]
#1646883
07/16/14 03:49 PM
07/16/14 03:49 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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master
Joined: May 2004
Posts: 3,210
robin hood country
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I have 6 cyl torsion bars, calvert 90/10 shocks, i flash stall it from around 2500 rpm, converter is UCC 5000 stall. Tyres are 31 x 10.5 hoosiers with tubes.
I didn't think it was clear enough to tell.
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: AFCO DOUBLE SETTINGS
[Re: deaks]
#1646884
07/17/14 06:37 PM
07/17/14 06:37 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
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Joined: May 2004
Posts: 3,210
robin hood country
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Right, i've been looking at my settings, on the vid posted, i had the extension set on 24 from full soft out of a possible 40 clicks. On the afco instructions, for heavy door cars slower than 9.90 at the faster end it says 6-8 clicks from full soft, i've moved it to 8 for next time out.
On the comp i had 14 clicks from full soft out of a possible 24.
Afco says for 12-16 from full soft, so i've moved them to 16.
So basically, the comp is around the same but i've loosened the ext 8 clicks.
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: AFCO DOUBLE SETTINGS
[Re: deaks]
#1646885
07/17/14 07:10 PM
07/17/14 07:10 PM
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Joined: Aug 2007
Posts: 2,224
Arlington, Tx.
BJS racing
top fuel
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top fuel
Joined: Aug 2007
Posts: 2,224
Arlington, Tx.
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Quote:
Right, i've been looking at my settings, on the vid posted, i had the extension set on 24 from full soft out of a possible 40 clicks. On the afco instructions, for heavy door cars slower than 9.90 at the faster end it says 6-8 clicks from full soft, i've moved it to 8 for next time out.
On the comp i had 14 clicks from full soft out of a possible 24.
Afco says for 12-16 from full soft, so i've moved them to 16.
So basically, the comp is around the same but i've loosened the ext 8 clicks.
Mick
I think that will help from the video I saw but you will notice a difference good or bad when you go out. Let us know what happens.
Back in the swing of things at Painless again! Great to be back!
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Re: AFCO DOUBLE SETTINGS
[Re: toddd]
#1646887
07/17/14 07:54 PM
07/17/14 07:54 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
OP
master
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OP
master
Joined: May 2004
Posts: 3,210
robin hood country
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My phone contract is up, they're going to give me a new phone with a better deal. The new one has frame by frame playback. Just need a friend with a steady hand. Lol
Thanks for sll the tips
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: AFCO DOUBLE SETTINGS
[Re: deaks]
#1646888
07/17/14 08:28 PM
07/17/14 08:28 PM
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Joined: Sep 2004
Posts: 1,499
San Antonio,TX
440W8 Duster
pro stock
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pro stock
Joined: Sep 2004
Posts: 1,499
San Antonio,TX
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But if the shocks are mounted in front of the diff. don't that change how the shock reacts? Also if you make any shock adjustments you need to make them bye 4 clicks at a time to notice to see if it works.
70 Duster W8 motor.
1.29 60ft 5.79 1/8 at 120 mph
glide with 1.80 gear
@3170 lbs.
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Re: AFCO DOUBLE SETTINGS
[Re: 440W8 Duster]
#1646889
07/17/14 09:31 PM
07/17/14 09:31 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
But if the shocks are mounted in front of the diff. don't that change how the shock reacts? Also if you make any shock adjustments you need to make them bye 4 clicks at a time to notice to see if it works.
Yes it does change the way the shock reacts due to the
difference in leverage... and yes if he has 40 points
of adjustment then he can go 4 or 5 clinks at a time
to see a change
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