Was there ever a provision for a mechanical diaphragm style fuel pump
on a Mazda rotary?  Suitable for filling a carburetor float bowl?  I
looked through on line catalogs for early Mazda rotary powered
vehicles, and only found electric pumps listed.  Is there a place to
put a fuel pump eccentric on the engine?

Regards,

Matt-

I had one of the earliest cars in 1973 and it had an electric pump.
It would have to be belt driven.

Paul Lamar


Matt,

Are you running a 13B or RX8, there is provision for a pump
If you are RX8. You can use the drive for the apex seal oiler
If you use premix in the tank instead. I am thinking of doing it
With my RX8, it will require a machined block to suit.

Chris in NZ.

That is a great idea Chris.

This outfit has all sorts of mechanical fuel pumps.
http://www.kinsler.com/page--Home-Page--13.html
Download the complete catalog here.
http://www.kinsler.com/page--HandbookCatalog--2.html


Paul Lamar

   Chris, this is an excellent idea and with an out board ignition system no
   electrics are required to operate the engine, with a hand primer you
  could
   hand prop it and do away with the starter. Mod the engine Paul, I will
   spring for the mod if it is not too expensive.

   Milo

   I will when I get time. I sold the KIS Cruiser and a firewall
   forward turbo engine package for it and I am getting that ready to
   ship. I bought Mike's RV4 so I need money to pay for that
   and space in the hangar to house it. I also need to pick it up
   in Minneapolis and tow it down here.

   The C182 is up for sale as well. All this takes time.

   I have your test stand almost ready to start. I am waiting
   on some more wire of the right size. I think the EFI plumbing
   needs redoing too. Once we get it running with Tracy's system
   as a base line then we can try some other simpler ideas.

   I need a couple of self clones :)

   Paul Lamar

  Paul,
  No push, I am sure your plate is full. But I want to add using the oil
  holes
  for direct injection like a standard aircraft engine.

  milo


Does anynone know the rpm of the oil pump on the RX8 engine?
milo

Correct Milo,

The idea is to make my RX8 stand alone, I think I’ll keep the starter
though I got sick of hand propping my other Long EZ.  Thanks for the link to
Kinsler Paul, you guys sure are lucky in the USA over here we have to make
it all ourselves.  I did look at the site But it was, as usual, for pissed
on engines.  It would be about the same work to adapt one of theirs as to
make one.

Cheers Chris in NZ

I agree. It is pretty easy to make.
I built a small gear pump out of pinion gear stock
from Boston Gear.The gears are kind of small.
Worked great as long as you don't load it down and
try to get too much pressure out of it.

Use the largest diameter pinion stock and change
the volume output by changing the gear width.
You will need up to 30 gallons an hour at half
e-shaft speed of 3000 to 3500 RPM. It will require
a bypass type pressure regulator.

Figure the area of the space between the teeth for 360 degrees
and multiply by 2 for both gears. Then multiply by the gear
width to get the volume for one revolution.


http://www.pinionrod.com/pinionrod.htm
https://sdp-si.com/eStore/Direct.asp?GroupID=608
https://sdp-si.com/eStore/Direct.asp?GroupID=438

Paul Lamar