|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
08-30-2019, 10:07 PM | #1 |
Senior Member
Join Date: Nov 2018
Location: Edmonton, AB
Posts: 167
|
Fitting a Fuel Pump
I'm looking for some advice from the experts. I'm in the process of fitting a fuel pump to the 1951 flathead that I worked on last winter and hope to fire up soon and install in my 1952 F1. I bought a new fuel pump which I think is correct for this motor. I also acquired a stand from a 1948 Mercury M3. I know this is not correct for this motor but I'm thinking to ditch the draft tube and use this instead for ventilation. My problem is that with the 1/2" spacer that I made and which brings the fuel pump to the correct height in relation to the push rod length there is no clearance between the fuel pump and the intake. The pushrod is 8 7/8". What do I do to fix that? Some options come to mind:
1. Make a thicker spacer and get a longer pushrod. 2. Shave off some material from the intake where the fuel pump touches. 3. Shave off some material from the bottom of the fuel pump where it touches the intake. Any advice would be appreciated. Thanks. |
08-30-2019, 10:15 PM | #2 |
Senior Member
Join Date: May 2010
Location: MN
Posts: 7,053
|
Re: Fitting a Fuel Pump
Just need about a 1/4" movement from the fuel rod.
|
Sponsored Links (Register now to hide all advertisements) |
|
08-31-2019, 07:26 AM | #3 |
Senior Member
Join Date: Feb 2011
Posts: 794
|
Re: Fitting a Fuel Pump
My advice, (and you probably won't like it ) is to get rid of the mismatched fuel pump stand/ oil filler and install the correct pump stand that will use the 10-1/16 long push rod that goes with that intake manifold.
|
08-31-2019, 08:01 AM | #4 |
Senior Member
Join Date: May 2010
Location: Coral Springs FL
Posts: 10,930
|
Re: Fitting a Fuel Pump
34 PKUP has the best and easiest solution.
|
08-31-2019, 08:26 AM | #5 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,312
|
Re: Fitting a Fuel Pump
Yep.
|
08-31-2019, 09:02 AM | #6 |
BANNED
Join Date: May 2010
Posts: 3,019
|
Re: Fitting a Fuel Pump
Sponsored Links (Register now to hide all advertisements)
You MUST use the 8 ba push rod because it is larger in dia than the '48 on back push rod, remember the push rod bushing in the block. The difference between the the 2 stands from the center line of the 5/16 - 18 fuel pump attaching holes to the base where the stand sets on the intake is 1.200. You have 'shortened' that to .700 with your .500 spacer. If you shorten your 8 ba push rod .700 you'll be in business. You must remove the end of the p/r that goes into the block and do the shortening on the hollow portion of the p/r then reinstall the hardened end. Most of the motors I do are 8ba and we frequently 'dress' them with early external components. Please feel free......any and all.....to fill any blanks I've missed. Charlie ny |
08-31-2019, 12:11 PM | #7 |
Senior Member
Join Date: Nov 2018
Location: Edmonton, AB
Posts: 167
|
Re: Fitting a Fuel Pump
Following your logic I could also make a new 1.2" spacer and not shorten the longer push rod. Right?
|
08-31-2019, 01:02 PM | #8 |
Senior Member
Join Date: May 2010
Location: East Hartford, Ct
Posts: 5,898
|
Re: Fitting a Fuel Pump
The 8BA fuel pump stand I have measures 2.600 to the C/L of the mounting bolts. That along with the thickness of the intake manifold (2.312) will give the overall distance to the intake mounting surface of 4.912 that will allow the use of the standard 8BA push-rod that measures 10 1/6" long.
Keep in mind that the 8BA stand pump mount surface is also kicked off to about a 45 degree angle towards the drivers side, not straight forward like the one you have.
__________________
DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES Last edited by 51 MERC-CT; 08-31-2019 at 02:02 PM. |
08-31-2019, 01:29 PM | #9 |
BANNED
Join Date: May 2010
Posts: 3,019
|
Re: Fitting a Fuel Pump
43,
I would shorten the push rod and not go taller that the 1/2" spacer. Shortening the p/r is a 5 minutes job , and the job looks better to my eye. Charlie ny |
08-31-2019, 02:06 PM | #10 |
Senior Member
Join Date: Jun 2013
Location: east coast
Posts: 113
|
Re: Fitting a Fuel Pump
|
08-31-2019, 07:24 PM | #11 |
BANNED
Join Date: May 2010
Posts: 3,019
|
Re: Fitting a Fuel Pump
I'm guessing 43 has that figured out.......if this was my build I'd loose the extra deep
base on the pump and use the original style AC or Holley...much less deep OR a 1/8" thicker spacer and adjust the math Charlie ny |
|
|
Sponsored Links (Register now to hide all advertisements) |
|