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08-02-2010, 03:08 PM
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#1 |
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Registered User
Join Date: May 2007
Location: South Carolina
Posts: 54
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Ignition Question(s)
I did a little upgrade over the weekend to my pick'm up ('70 c10, 350, 5.7L 4BBL Eldebrock 1406 carb). I replace the HEI with a complete ignition setup - MDS AL6 ignition box, MSD Blaster 2 coil, MSD Pro Billet Distributor, New spark plug wires, new spark plugs (AC Delco R43T).
I set my plugs gapl is set at .45, started it up and it's a rough idle (I have not set the timing yet). The question is did I set the plug gap to large? A friend of mind said I quote " they should be set between .35 to .40 you need some really good fire if the gap is set at .45." I said, I thought the new setup gave really good fire...am I in left field??? 
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CWO3, USN, RET When a man's ways please the Lord, He makes even his enemies to be at peace with him.; A man's heart plans his way, But the Lord direct his steps." (Prov 16:7, 9 NKJV) Never look down on anyone unless you are helping them up. SMS. |
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08-02-2010, 03:14 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,669
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Re: Ignition Question(s)
I ran the same set up on a 350. Spark plug gap at .55. Made a big difference in how it ran with the wider gap. Ran way better. Just experiment a bit to find your optimum gap.
Some say that an MSD like yours has enough fire power to weld with!!! Get your buddy to hand onto a sparkplug wire while you crank it. He'll find out about power!!! Last edited by geezer#99; 08-02-2010 at 03:22 PM. |
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08-02-2010, 03:20 PM
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#3 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Ignition Question(s)
you could try the MSD techline too//or if you have the instruction sheets it should b in them
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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08-02-2010, 03:27 PM
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#4 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,226
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Re: Ignition Question(s)
You set the gap just right. A variation will not cause a noticable problem. You need to check your wires & make sure they are not crossed. Set the timing. Check for vacuum leaks.
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08-02-2010, 04:43 PM
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#5 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,236
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Re: Ignition Question(s)
idle will be bad untill timing is set
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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08-02-2010, 06:57 PM
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#6 |
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Registered User
 
Join Date: Nov 2007
Location: Turlock California 95380
Posts: 2,075
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Re: Ignition Question(s)
I think your spark plug gap is fine. The standard GM HEI uses that same gap. I would set the timing as mentioned as see how she likes it. I was thinking about upgrading to the same pro billet distributor, but I thought it didnt require the 6al box.
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72 C20 Longbed 05 1500 Z71 |
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08-02-2010, 07:36 PM
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#7 |
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Registered User
Join Date: Jul 2005
Location: Steeleville IL
Posts: 72
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Re: Ignition Question(s)
Hope you mean .045
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72 k10 swb. 350/th350/np205. Vintage air'd daily driver |
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08-02-2010, 10:00 PM
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#8 | |
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Registered User
Join Date: May 2007
Location: South Carolina
Posts: 54
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Re: Ignition Question(s)
Quote:
__________________
CWO3, USN, RET When a man's ways please the Lord, He makes even his enemies to be at peace with him.; A man's heart plans his way, But the Lord direct his steps." (Prov 16:7, 9 NKJV) Never look down on anyone unless you are helping them up. SMS. |
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08-02-2010, 10:02 PM
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#9 | |
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Registered User
Join Date: May 2007
Location: South Carolina
Posts: 54
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Re: Ignition Question(s)
Quote:
__________________
CWO3, USN, RET When a man's ways please the Lord, He makes even his enemies to be at peace with him.; A man's heart plans his way, But the Lord direct his steps." (Prov 16:7, 9 NKJV) Never look down on anyone unless you are helping them up. SMS. |
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08-02-2010, 10:04 PM
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#10 | |
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Registered User
Join Date: May 2007
Location: South Carolina
Posts: 54
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Re: Ignition Question(s)
Quote:
__________________
CWO3, USN, RET When a man's ways please the Lord, He makes even his enemies to be at peace with him.; A man's heart plans his way, But the Lord direct his steps." (Prov 16:7, 9 NKJV) Never look down on anyone unless you are helping them up. SMS. |
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