Spark plugs with msd 6AL

69XMan

Member
Local time
3:09 AM
Joined
Jun 6, 2021
Messages
16
Reaction score
17
Location
Greenville Sc
I just switched over to MSD digital 6AL and pro billet distributor. 69 Plymouth gtx with 440. What spark plugs should I be running? Seems like a cheap copper one is what I’m reading because it will keep cooler with the multiple spark. Anyone have a successful plug they recommend?
 

pnora

FBBO Gold Member
FBBO Gold Member
Local time
3:09 AM
Joined
Apr 21, 2020
Messages
2,459
Reaction score
2,615
Location
Ishpeming, Mi.
I always ran the NGK V-Fire basic plug. Depending on heads and usage you can chose projected or non-projected tip. Stay away from the fine wire tip.
 

topside

Well-Known Member
Local time
2:09 AM
Joined
May 26, 2010
Messages
169
Reaction score
143
Location
Sandpoint, ID
I've always used the same plugs as I did before adding an MSD6.
I generally use Champions; though the quality appearance of NGKs is nicer, I haven't seen a performance advantage.
For non-stock/non-restoration applications, the F150 epoxy coil & pigtail (about $40 @ AutoZone) is great.
Quicker light-off than any other coil I've used.
 

GTX JOHN

Well-Known Member
Local time
2:09 AM
Joined
Sep 6, 2009
Messages
552
Reaction score
343
Location
Boulder City, NV.
I believe the heads are stock. I have not measured the compression of the engine. Iv owned the car a bit over a year.
J10Y in old days or UJ10Y
Now RJ10YC I believed is what they supercede to now
Gap between .035 and .040 I like the blaster coil on a street car (040 with it)
 

69XMan

Member
Local time
3:09 AM
Joined
Jun 6, 2021
Messages
16
Reaction score
17
Location
Greenville Sc
J10Y in old days or UJ10Y
Now RJ10YC I believed is what they supercede to now
Gap between .035 and .040 I like the blaster coil on a street car (040 with it)
Thank you. I am running blaster coil. The car ran pretty well before my conversion project. But now I can’t get the timing right and it running smooth. I can get it to idle but backfires when revving up. Using the timing light it seems like it is wanting to idle at like 20*+ btdc. But hard on the starter. I initially thought I would have initial timing around 12* or so.
 

Geoff 2

Well-Known Member
Local time
2:09 AM
Joined
Jul 21, 2014
Messages
515
Reaction score
258
Location
Australia
There is nothing negative about fine wire plugs, except the price.
They:
- last muuuuch longer
- require less arc over voltage, so will fire when a conventional plug might misfire
- because of the reduced voltage requirement, the hot rodder can run a larger gap to expose more mixture to the spark
 

Geoff 2

Well-Known Member
Local time
2:09 AM
Joined
Jul 21, 2014
Messages
515
Reaction score
258
Location
Australia
Silver Fine Wire? I doubt it. The thin wire/electrode requires a very high melting point, which is why Platinum, Iridium, Yttrium etc are used. Silver has a low MP.
 

Rusty 72

Well-Known Member
Local time
2:09 AM
Joined
Jun 16, 2019
Messages
262
Reaction score
100
Location
Minneapolis, MN
I use the copper cores and open em way up to 50. That MSD will jump the Grand Canyon if needed.
 

69XMan

Member
Local time
3:09 AM
Joined
Jun 6, 2021
Messages
16
Reaction score
17
Location
Greenville Sc
Update. I put NGK plugs in and custom made a MSD 90 boot to go on the plug. Problem is the header burned up the boot. Can in put an Accel shorty plug in the #5 & 6 cylinder? Or should I go through the trouble to notch the headers? Or try to find a smaller boot? The MSD boot is a bit large.
 

Top