FE Power Forums

FE Power Forums => FE Technical Forum => Topic started by: turbohunter on May 15, 2013, 09:43:55 AM

Title: Oil pump drive size lesson
Post by: turbohunter on May 15, 2013, 09:43:55 AM

Sorry guys, more questions.
Why do FE pump drives come in two sizes (1/4, 5/16)?
I ssume 1/4 is standard, what were the applications for the 5/16?

Title: Re: Oil pump drive size lesson
Post by: thatdarncat on May 15, 2013, 10:35:34 AM

FT big truck engines ( 361, 391 ) use a 5/16 drive. Oil pump and distributor use the larger size. FE passenger car and light truck ( 360, 390 ) engines use the 1/4"

Title: Re: Oil pump drive size lesson
Post by: turbohunter on May 15, 2013, 12:05:07 PM

Makes sense, thanks.

Title: Re: Oil pump drive size lesson
Post by: ScotiaFE on May 15, 2013, 01:20:34 PM

You can also use a FT 5/16" drive pump on an FE with the custom drive shaft.
It's really just the same pump with a thicker hex.

Melling FE Pump specs

M-57 STD Volume Yellow Spring 40-45psi  1/4" Drive

M-57B Std Volume Brown/Plain Spring 60-65 psi 1/4" Drive

M-57HP Std Volume Big Blue Spring 100-110 psi 1/4" Drive

M-57HV High Volume Brown/Plain Spring 60-65 psi 1/4" Drive

M-57A Std Volume Brown/Plain Spring 60-65 psi 5/16" Drive

M-57AHV High Volume Brown/Plain Spring 60-65 psi 5/16" Drive

Title: Re: Oil pump drive size lesson
Post by: turbohunter on May 15, 2013, 02:37:52 PM

As a matter of fact I just ordered one from Precision :)