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Re: think this may be a problem? [Re: Thumperdart] #1503526
09/19/13 08:58 PM
09/19/13 08:58 PM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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Quote:

What compression...........that #6 is awfully hot.........




10.25 - 10.4:1, depending on the calculator used. aluminum heads.

Re: think this may be a problem? [Re: mickm] #1503527
09/19/13 09:01 PM
09/19/13 09:01 PM
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State of confusion
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Thumperdart Offline
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I`d run a #7 myself...............my sig et was w/a #7 and showed a bit of peppering at 12.1.1 compression w/alum. heads.......


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: think this may be a problem? [Re: Thumperdart] #1503528
09/20/13 02:04 AM
09/20/13 02:04 AM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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Quote:

I`d run a #7 myself...............my sig et was w/a #7 and showed a bit of peppering at 12.1.1 compression w/alum. heads.......




can't hurt. new plugs would help eliminate one issue. i'll give it a try.

Re: think this may be a problem? [Re: mickm] #1503529
09/20/13 12:59 PM
09/20/13 12:59 PM
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Thumperdart Offline
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I hope you figure it out cos this stuff can drive you crazy...........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: think this may be a problem? [Re: Thumperdart] #1503530
09/20/13 01:51 PM
09/20/13 01:51 PM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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Quote:

I hope you figure it out cos this stuff can drive you crazy...........




yea, it does. in reality is's a relatively mild build, just a lot of cubic inches. i did it that way hoping to just be able to drive it with usual maintenance. but, here we go. sigh...

today we are going to put a points distributor in and eliminate the whole current ignition system and go from there.

i'll post the results.

Re: think this may be a problem? [Re: mickm] #1503531
09/20/13 01:56 PM
09/20/13 01:56 PM
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Thumperdart Offline
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Cool...............good luck. Where abouts in Cally r u?


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: think this may be a problem? [Re: Thumperdart] #1503532
09/20/13 02:50 PM
09/20/13 02:50 PM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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Quote:

Cool...............good luck. Where abouts in Cally r u?




bay area, mountain view. 80 miles from the nearest track better than some have it i know, but it makes for a long day...

Re: think this may be a problem? [Re: mickm] #1503533
09/20/13 08:05 PM
09/20/13 08:05 PM
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Thumperdart Offline
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Gotcha...............every track is miles from me and I don`t have a truck and trailer so I rely on others which sucks so I don`t race much anymore and that`s fine w/me cos driving on the street beats racing any day...........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: think this may be a problem? [Re: mickm] #1503534
09/20/13 08:31 PM
09/20/13 08:31 PM
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Canton, Ohio
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Sport440 Offline
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Quote:

Quote:

I hope you figure it out cos this stuff can drive you crazy...........




yea, it does. in reality is's a relatively mild build, just a lot of cubic inches. i did it that way hoping to just be able to drive it with usual maintenance. but, here we go. sigh...

today we are going to put a points distributor in and eliminate the whole current ignition system and go from there.

i'll post the results.





Any results yet>

Re: think this may be a problem? [Re: Sport440] #1503535
09/21/13 12:11 AM
09/21/13 12:11 AM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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Quote:

Quote:

Quote:

I hope you figure it out cos this stuff can drive you crazy...........




yea, it does. in reality is's a relatively mild build, just a lot of cubic inches. i did it that way hoping to just be able to drive it with usual maintenance. but, here we go. sigh...

today we are going to put a points distributor in and eliminate the whole current ignition system and go from there.

i'll post the results.





Any results yet>




no, didn't get a chance to get it in.

how do i wire a temporary ballast resistor? i only need this in long enough to get the points distributor in and drive the car for a few minutes. if the problem persists, i need to look elsewhere, but if it is gone, i know it is in the current ignition.

Re: think this may be a problem? [Re: mickm] #1503536
09/21/13 12:34 AM
09/21/13 12:34 AM
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Romeo MI
MR_P_BODY Offline
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how do i wire a temporary ballast resistor? i only need this in long enough to get the points distributor in and drive the car for a few minutes. if the problem persists, i need to look elsewhere, but if it is gone, i know it is in the current ignition.




Here is a simple wiring diagram
EDIT
For a points dist you only have the one wire out of
the dist .. that goes to the - coil... the rest in
the diagram are the same

7860180-DSC00017.JPG (21 downloads)
Last edited by MR_P_BODY; 09/21/13 12:38 AM.
Re: think this may be a problem? [Re: mickm] #1503537
09/21/13 12:41 AM
09/21/13 12:41 AM
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Canton, Ohio
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Sport440 Offline
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For a test you dont need one. You could use the one you have by disconnecting the electronic ignition feed with a 12 volt positive feed.

But I would just feed a direct 12 volt positive to the coil for max performance for the test.

The stock ignition setup sends full voltage to the coil on the start up position and then sends reduced voltage to the coil on run position through the ballast for Extended point life. Since your just doing a short test, no ballast resister is needed.

Your simple test can be as easy as removing the electronic coil feed and replacing it with a hot positive feed jumper with the "test" points distributer. No need to rewire everything

Simply put, with a point distributer all you need is 12 volts pos to the pos side of the coil and run the neg. side of the coil to the distributer that will ground it out when the points contact.

Last edited by Sport440; 09/21/13 12:50 AM.
Re: think this may be a problem? [Re: Thumperdart] #1503538
09/21/13 11:31 AM
09/21/13 11:31 AM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
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How are you reading the plugs?


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: think this may be a problem? [Re: hemi-itis] #1503539
09/21/13 06:16 PM
09/21/13 06:16 PM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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got the old accell dual point distrubutor with a stock coil put back in. fired it up, and set the timing.

and...

it rained. first rain of the season came about an hour before we finished up. don't think today is the day to take the car out and see if it's breaking up above 5500 rpm.

will keep you posted...

Re: think this may be a problem? [Re: mickm] #1503540
09/22/13 10:59 PM
09/22/13 10:59 PM
Joined: Jul 2006
Posts: 4,177
California
mickm Offline OP
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ok. $20 napa coil, 40 year old accel dual point distributor, and it ran like the proverbial raped ape! feathered into it, hit 6k in first gear and the tires broke loose! ran it through 1st and 2nd a few times, was so happy to have the engine back again! damn that was fun!

put the msd coil back on and it stumbled and fell all over the place. tried it through the ballast resistor and straight 12v, and it was even worse. why it wasn't acting that bad with the msd, i don't know, but at least for the moment, that looks like it.

so going to order a new coil and see what happens... will post again...

so why do we run electoric ignition and these msd boxes?

Last edited by mickm; 09/22/13 11:00 PM.
Re: think this may be a problem? [Re: mickm] #1503541
09/22/13 11:08 PM
09/22/13 11:08 PM
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Chilliwack B.C. Canada
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Well, that's good news, glad you found it.

Sheldon

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