sparkplug question (flathead)

I've been running Champion H10's on my flathead stock with dual exhaust and 2 94's..the car runs rich, so I would like to go to a "hotter" plug to prevent spark plug fouling. is this a good idea? How do I find a hotter plug?


thanks

 

Here's a few choices:
http://www.thehotrodcompany.com/shopnow/show_dept.asp?dept_id=77&filterkey=sp

 

I run NGK only other plug I would run would be bosch. the equivalent is the NGK B6L for the H10. if you want hotter the NGK range's numbers go the other way so smaller is hotter so a 5 or a 4 (B5L or B4L) will give you a hotter plug.

The only other bit of info I have is to check the electrode tip is on firm, as , at least here in Australia they aren't always. I got caught out once on my ute with it not running right only to find that it was the electrode that had worked lose.

So now I always grab my side cutters and twist the electrode on so I know its firm

 

Also, what are you running for ignition?? Running retarded can mimic richness on the plugs.

 

thanks,the car is now 12 volt and i'm running my stock distributor with pertronix points eliminator kit with an Accel superstock coil. Ill take the plugs out one more time take a look and time it again.

 

Never had any luck with Champion plugs. NGK are okay.

Best I've used are Autolites (so far)

 

You don't say what engine is. If it is '49-53, running stock distributor with dual carbs will give you a very retarded advance curve usually. They are often rather retarded stock.

 

Back 40 or so years ago, Champion was the plug to run. Then they were sold. Then they were sold again, and the guy behind the counter said they are all new, give them a try. I did. My 5000 RPM 286 wont run over 3200 with Champions. O'Reilleys and car Quest has NGK B6L under part number 3212 Run nothing less than NGK.

 

I know it sounds stupid, and you have probably already checked it, but have you tried leaning out your carbs??

 

yeah, its a 50, I've had the 2x2's on it for over a year now, and its been running real good, but recently there have been moments where it idles fine but there is like a dead spot about half pedal where it sputters and runs lousy, but when its floored it seems to be back on all 8..then out of nowhere, it will "fix" it self for a little while, then will go back to running sputtery.

 

i use autolite 216. ive been running them in my flattie for 4 years and have had no problems.

 

I'm a believer in Autolite 216's as well. Haven't had good luck with Champions.

 

I'm currently running Champion H-10C (couldn't find any H-10 locally), but I did try the NGK B6L once. They got squished by my valves, as they were a touch longer than the H-10's.

Is there any way to space the NGK out a bit? Should I just slip another sealing washer on each plug, or is there a special washer for this? Maybe a thicker washer for special situations?