I believe the BF 32 is a little two cold for a stock 272. For a performance build it would probably work fine. For a closer to stock 272, 292, and 312 the BF 42 should work better. For an oil burner then step up to a BF 52. There is also an Iridium plug for the original y-block set up and it is a NGK WR5IX of the number might be WR51X and it more expensive but works great.

-Gary Burnette-

I believe the BF 32 is a little two cold for a stock 272. For a performance build it would probably work fine. For a closer to stock 272, 292, and 312 the BF 42 should work better. For an oil burner then step up to a BF 52. Done them all.

-Gary Burnette-

John Mummert recommends Champion RF11YC or Autolite BF32 on his website (tune up specs)


South Australia

I got it narrowed down to Autolite 46's or NGK. Going to test one to check on clearance with John Mummert Headers. If I get the Autolite 46, its just the copper one, the 46P is the platnum  (probably over kill for a stock 272 with four barrell)? If I go with NGK, it looks to me like I want the 1071 WR5. Does that sound like the correct cross reference for an Autolite 46?

Darrell Howard Whitefish, MT Outlaw 56 Ford F-100's

Thanks Gekko

Darrell Howard Whitefish, MT Outlaw 56 Ford F-100's

I have used Autolites for years but the present owners of the trademark have dropped many of the heat ranges.  They, Allied Signal (?) have also changed designations which just confuses matters, IMO.  Motorcraft is a good product and is readily available from many outlets.  I have also used NGK with excellent results.  They have extensive experience with high performance applications- just ask any motorcycle enthusiast.  NGK dominates motocross and road racing competition.  If your Y is not highly modified, use the stock heat range called for in the catalogs.  Once you know the OE plug, it can be cross referenced to the brand of your choice.  I do not recommend Champion or AC however.  Even though the early Y's came from the factory with Champions, the current production is not as good, again IMO. 

What number?



54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Autolite 46

Daniel Jessup

Lancaster, California

aka "The Hot Rod Reverend"
check out the 1955 Ford Fairlane build at www.hotrodreverend.com

NGK stands for Nippon (Japan) Gaishi (insulator) Kaisha (company). One of a number of companies.

Jim - Erie Colorado, 1957 Country Sedan

Ngk? Is that an abreviation for something? Im a little slow sometimes.

Darrell Howard Whitefish, MT Outlaw 56 Ford F-100's