• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)

Plug Gap.

Share this page

DNK

DNK

Great Pumpkin
Offline
I am actually installing real plugs in my never started rebuilt engine. I was wondering what I should gap the plugs . It has a Mallory Unilite dizzy and a Hyfire unit. I don't know if it matters,the plugs are BP6ES's.
 
I'd suggest starting with the standard gap, which as I recall is .025". Then after you have it running good, you can open the gap up and see if it makes any improvement (which I doubt).
 
I run BP6ES's also, but my ignition is Crane(actually Allison before Crane bought them) blue coil and MSD-6. I started at .035, tightened them up to .032, then .028, opened up to .038 and am back at .035. I've had the same plugs in for better than 10K miles(don't drive the 6 much lately, gotta get the seats in it).

So, experience with high performance ignition leads me to believe that you can go .035 no problem. The combustion chamber shape is different than a TR3.
 
LastDeadLast said:
With that dizzy I would go .035.
Click to expand...

TR3driver said:
I'd suggest starting with the standard gap, which as I recall is .025". Then after you have it running good, you can open the gap up and see if it makes any improvement (which I doubt).
Click to expand...

RonMacPherson said:
I run BP6ES's also, but my ignition is Crane(actually Allison before Crane bought them) blue coil and MSD-6. I started at .035, tightened them up to .032, then .028, opened up to .038 and am back at .035. I've had the same plugs in for better than 10K miles(don't drive the 6 much lately, gotta get the seats in it).

So, experience with high performance ignition leads me to believe that you can go .035 no problem. The combustion chamber shape is different than a TR3.
Click to expand...

hondo402000 said:
I run a MSD unit on my TR6 and the information says up to 10;1 compression you can go .050-.060 gap
Click to expand...

So there you have it, by default just put them in right out of the box. Each plug should be gapped by accident somewhere between .025 and .060

I've been using all the specs out of a Haynes manual and she's running like a top.
 
Back
Top