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EFV-8 Club Forum / General Ford Discussion / Engine Miss "Only Under Load "

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37RAGTOPMAN

12-13-2019 @ 10:01 AM

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HI STEVE LEE
I replaced my champion spark plug with NGK, AB-6 stock 2910 fit 1933 to 1938 and made a great improvement,
my 37 is not a race car,
NGK has spark plugs part number, B6L stock #3212 that may be what you need,?
IN their listing this is for 49 to 53 FORDS,
also have the IRIDUM IX plugs for the 55 and up FORDS, part number WR51X might be also a option,
it might be worth the try, you can call them they also have a listing for RACING SPARK PLUGS,
with illustrations of many spark plugs in there catalogs
do a little research, being you have high compression, you will have find out what works for you.
are you using high test gas or racing fuel,
I had a similar problem in my 57 CHEVY and it was a condenser,started to miss under load,
you also may have a fuel problem,
what size is you fuel line coming from the tank,?
if are trying to feed 2 or 3 carburetors this may be a issue,
trying to help 37RAGTOPMAN

This message was edited by 37RAGTOPMAN on 12-15-19 @ 7:48 AM

12-12-2019 @ 2:09 PM

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H.A.M.B - Hokey Ass Message Board. It's an online forum. See > https://www.jalopyjournal.com/forum/

sarahcecelia

12-12-2019 @ 11:45 AM

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Tom, Torque has no relation at all as the what is being torqued; unless you are torqueing something on say "rubber." It' a precise measure of "TIGHTNESS ONLY."

I didn't think I had to explain this about the extra "Washer" but I guess I do, It's not an extra spark plug washer, its an "indexing washer," along with the regular Plug "Crush washer."

When I raced Flatties ,"back in the day," All plugs were 'indexed, " to get the spark in the proper position for more complete combustion; and it really helps with the power! I know the plug are "indexed" on dragsters and in NASCAR. It's a "real science" when you race anything with a motor; and I did a lot of it, and it was a very exciting part of my life! I quit in the late 90's because I was always winning, and that takes all of the challenge, and thus, the fun out of it!!

Regards, Steve Lee

4dFordSC

12-11-2019 @ 6:31 PM

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https://www.jalopyjournal.com/forum/forums/the-hokey-ass-message-board.5/

sarahcecelia

12-11-2019 @ 6:14 PM

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What or who is Hamb, and how would I contact them???I though that was smoked pork! HA Ha!!

Regards, Steve Lee

sarahcecelia

12-11-2019 @ 6:12 PM

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Tom, Got to have that extra washer or the valves will hit the electrodes!
I made that mistake. I took them out to inspect and clean them, put them back in. Ran the motor in the shop, revved it and all of a sudden it was missing, Shut her down, found the one that caused the miss, took the plug out, and The electrode was almost totally closed! That extra washer was not on it! I found it on the floor under the motor. Put it on and no miss.
But that was not under a load in the shop when I revved it! NAVARO High Compression Heads need those extra washers!!It's a must!! I called Mike at H&H and he verified it!!

Regards, Steve Lee

sarahcecelia

12-11-2019 @ 5:57 PM

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I still think it's plugs, and just wanted to know what others thought. I got a new set of champion H10's and I'm going to install them and see what gives. Thanks for all the nice replies, I sincerely appreciate them!

Regards, Steve Lee

sarahcecelia

12-11-2019 @ 5:52 PM

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This motor ran fine one day and then started to miss on harder acceleration; like just normal passing. It doesn't miss on normal" "neighborhood" acceleration.
And I AM! a former race driver. I raced dirt track oval with a '40 Ford sedan in the 1950's., With floor shift( ran 2nd gear) and very hopped up "Flattie;" 3 carbs, wild cam, bored, heads, headers (with no exhaust pipes or mufflers), stroked, relieved ,you name it, and then went to outboard boat racing in the late 1960's. I ran "Stock Class B Runabout" with a 20 HP mercury W/ Quicksilver lower unit, and did 57 MPH. I had a hydroplane also, B Stock. and with the same motor it did 64 MPH. I won the Florida State Championship in my class with the runabout, in the 1980's.The alky's (alcohol fueled)with the same type boat, ran in the 70 MPH range! So I can handle that 400 Jr. cam with ease! Been there, done that!!

Regards, Steve Lee

sarahcecelia

12-11-2019 @ 5:22 PM

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Nope it's neither of those. My hunch is still plugs, the are Autolite 816's., and a lot of guys have had problems with them! I had one that had about 100 miles on it; it was clean, set to .032, in good condition, and it wouldn't spark!! I took it out connected it's lead to it and grounded it on the head, cranked the motor with the button at the bottom of the starter solenoid- and NOTHING!!;put another new one in, and it sparked!!Go figure!!!

Regards, Steve Lee

4dFordSC

12-11-2019 @ 1:33 PM

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In view of all the modifications made to your engine, you might have better luck your question over on the HAMB.

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