We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 36 matches

by Ohio Rob
Fri Jul 10, 2020 9:30 pm
Forum: Engine Tech
Topic: Mechanical fuel pump pushrod question
Replies: 3
Views: 175

Re: Mechanical fuel pump pushrod question

Thanks fellas.
I just learned that a World Products Merlin block takes a .200 longer push rod.

I’ve been chasing a duel supply issue lately.

Thanks again!
by Ohio Rob
Fri Jul 10, 2020 8:05 pm
Forum: Engine Tech
Topic: Mechanical fuel pump pushrod question
Replies: 3
Views: 175

Mechanical fuel pump pushrod question

Hello all.
This is probably a real dumb question, but here goes.

Should a mechanical fuel pump have a preload on the pushrod / lever when on the base circle?

If it should have some lash as opposed to preload, how much would be within the parameters?
Specifically a BBC.

Thanks a bunch.
by Ohio Rob
Wed Jul 08, 2020 12:12 pm
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

Glad you figured it out. I kinda figured that it wasn't your original filter setup. On marine applications, is the vent on the fuel pump supposed to go into the intake tract? Yes, that screened vent is screwed into an 1/8” NPT. I have a barbed 1/8”NPT fitting that I have a line on that terminates i...
by Ohio Rob
Wed Jul 08, 2020 5:45 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

Sorry to hear about the problems. When you take your boat out are you running it off-shore or in inland lakes/rivers? Did you (carefully) cut open the old fuel cartridge and check to see if it was plugged up with detritus? I am just concerned about association and causation: root cause failure anal...
by Ohio Rob
Tue Jul 07, 2020 7:31 pm
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

After trying to reach someone at Baker engineering with zero customer service, I bought a Holley fuel pump. I called 4 times and was passed to an answering machine in the “tech” department. Left multiple messages and still haven’t received a return call or email. Last call, I asked the receptionist ...
by Ohio Rob
Tue Jul 07, 2020 7:23 pm
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

Rob- How did it work out? I’m waiting on a plate of 6061 to machine up a bracket to mount the fuel filter on the cylinder head. I have some nylon spacers to isolate the Heat transfer. I removed the filter out of the circuit completely and still could only muster 3 PSI of pressure. I pulled the Bake...
by Ohio Rob
Wed Jul 01, 2020 9:12 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

I just received a replacement element yesterday. The element on the boat is the original. Boat has about 40 hours of run time on it. Last night, I removed the filter from the circuit. I have the parts to move the filter to after the pump and mount it above the pump on the front of the cylinder head....
by Ohio Rob
Wed Jul 01, 2020 6:20 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

Thanks for the replies. The tank is vented with a 5/8” hose. It is clear. I thought about a cracked pickup tube, so I pulled the tank fitting and put some air on the vent hose (a couple PSI) and was looking for some leakage around the half of the pickup tube that is not submerged. The column of fuel...
by Ohio Rob
Tue Jun 30, 2020 11:43 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

Thanks RP930.
I have the stuff to move the filter to the pressure side of the pump. That’s what I plan on doing even though the filter rep says it won’t matter.
by Ohio Rob
Tue Jun 30, 2020 11:00 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

I think 3 micron is way too restrictive on the suction side. That’s the same filter they use on all the high end Merc racing boats and several desert race trucks (Baja 1000) according to the FST rep. The filter will flow over 300 gallons an hour due to the large surface area. This is according to F...
by Ohio Rob
Tue Jun 30, 2020 10:41 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

You could always tee a vacuum gauge on the inlet side of the pump to see if there's a restriction in either the plumbing or the filter element. The pump itself should be able to pull at least 15" Hg vacuum. When running, any vacuum means a restriction. If it runs good with a full tank, what changes...
by Ohio Rob
Tue Jun 30, 2020 9:26 am
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Re: Fuel system architecture question (mechanical pump / filter)

I think 3 micron is way too restrictive on the suction side. That’s the same filter they use on all the high end Merc racing boats and several desert race trucks (Baja 1000) according to the FST rep. The filter will flow over 300 gallons an hour due to the large surface area. This is according to F...
by Ohio Rob
Mon Jun 29, 2020 4:34 pm
Forum: Engine Tech
Topic: Fuel system architecture question (mechanical pump / filter)
Replies: 28
Views: 689

Fuel system architecture question (mechanical pump / filter)

Hello all. I’m currently sorting out a fuel supply issue on my offshore boat and I need some ideas / advice. The boat is a naturally aspirated, BBC with a Baker 6 vane fuel pump. I have an Aeromotive bypass regulator and the pump puts out 15PSI. I have the regulator Set to bypass all but 6 PSI. I’m ...
by Ohio Rob
Mon May 25, 2020 7:32 am
Forum: Engine Tech
Topic: Mercury (Ford) 289 marine, worth buying?
Replies: 17
Views: 978

Re: Mercury (Ford) 289 marine, worth buying?

I don’t believe the marine blocks had a different composition in regards to nickel content.
As has already been said, if it was freshwater cooled, it’s probably fairly rusted inside the water jackets.