Re: "Breaking up" at 3k rpm (help)
[Re: WS68SSC]
#2674235
07/04/19 09:05 PM
07/04/19 09:05 PM
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Joined: Jan 2004
Posts: 667 IL
Dart451
mopar
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mopar
Joined: Jan 2004
Posts: 667
IL
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Re: "Breaking up" at 3k rpm (help)
[Re: WS68SSC]
#2674442
07/05/19 01:47 PM
07/05/19 01:47 PM
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Joined: Feb 2008
Posts: 715 Central TEXAS!!!!
sr4440
super stock
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super stock
Joined: Feb 2008
Posts: 715
Central TEXAS!!!!
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Just to be clear, the Violet wire on the MSD connects to the White/Orange on the mopar distributor and the green wire to black.
Joe
Last edited by sr4440; 07/05/19 01:52 PM.
Without Data, you’re just another guy with an opinion.
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Re: "Breaking up" at 3k rpm (help)
[Re: WS68SSC]
#2674678
07/06/19 05:03 AM
07/06/19 05:03 AM
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Joined: Jan 2003
Posts: 2,926 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,926
A shed in England
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Just as a matter of interest, I've recently hopefully solved a couple of issues in 2 different cars we have. 1 was the ign switch on our '68 sb Barracuda, it was so worn vibration would turn the main feed on and off, it pays to check the simple stuff. The other was a crank trigger on the Challenger, This "went away" slowly getting worse after 6 passes or so. Closing the gap to .035" helped but that's way below MSDs min spec of 0.050 and it seemed reluctant to pull more than 6500 ish rpm. Hoping for good things now it's fixed as it ran a 9.59 @ 141 which is good for the 572 engine.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: "Breaking up" at 3k rpm (help)
[Re: tubtar]
#2677859
07/16/19 09:00 AM
07/16/19 09:00 AM
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Joined: Jan 2004
Posts: 667 IL
Dart451
mopar
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mopar
Joined: Jan 2004
Posts: 667
IL
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Still fighting my issue I added the shielded trigger wire, did distributor mod and changed tach but still missing and having the shifter change gears to soon (elite rpm switch from digital display). Going to try replacing the digital 6 box with 6al that I ran trouble free last year and see if problem fixes itself.
I added nitrous this year and wanted the digital box to pull timing when spraying, only reason I changed from 6al box.
Last edited by Dart451; 07/16/19 09:00 AM.
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Re: "Breaking up" at 3k rpm (help)
[Re: Dart451]
#2677879
07/16/19 10:14 AM
07/16/19 10:14 AM
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Joined: Dec 2012
Posts: 1,824 Wind Gap,Pa.
Sammy
top fuel
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top fuel
Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
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Still fighting my issue I added the shielded trigger wire, did distributor mod and changed tach but still missing and having the shifter change gears to soon (elite rpm switch from digital display). Going to try replacing the digital 6 box with 6al that I ran trouble free last year and see if problem fixes itself.
I added nitrous this year and wanted the digital box to pull timing when spraying, only reason I changed from 6al box. Double check your settings on the digital 6 box. I'm sure you got one or more of the dials wrong. Make sure you are absolutely sure you have the dial on 8 cylinder setting. It can be confusing. I bet the box is set wrong. Also check your high speed rev limit on the dial.
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Re: "Breaking up" at 3k rpm (help)
[Re: Dart451]
#2677893
07/16/19 11:20 AM
07/16/19 11:20 AM
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Joined: Mar 2005
Posts: 1,581 N/E, Michigan
RATTRAP
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,581
N/E, Michigan
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Still fighting my issue I added the shielded trigger wire, did distributor mod and changed tach but still missing and having the shifter change gears to soon (elite rpm switch from digital display). Going to try replacing the digital 6 box with 6al that I ran trouble free last year and see if problem fixes itself.
I added nitrous this year and wanted the digital box to pull timing when spraying, only reason I changed from 6al box. I've had more than one digital box go bad, I keep my standby 6AL to plug in just to check if its the digital box that failed. When my digital went bad i had no spark at all, It's Really quite frustrating when the digital boxes go bad.
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Re: "Breaking up" at 3k rpm (help)
[Re: Sammy]
#2677984
07/16/19 04:24 PM
07/16/19 04:24 PM
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Joined: Dec 2012
Posts: 1,824 Wind Gap,Pa.
Sammy
top fuel
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top fuel
Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
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Still fighting my issue I added the shielded trigger wire, did distributor mod and changed tach but still missing and having the shifter change gears to soon (elite rpm switch from digital display). Going to try replacing the digital 6 box with 6al that I ran trouble free last year and see if problem fixes itself.
I added nitrous this year and wanted the digital box to pull timing when spraying, only reason I changed from 6al box. Double check your settings on the digital 6 box. I'm sure you got one or more of the dials wrong. Make sure you are absolutely sure you have the dial on 8 cylinder setting. It can be confusing. I bet the box is set wrong. Also check your high speed rev limit on the dial. Now check where you have you high speed rev limiter at.
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