ashontz
Joined: 27 Dec 2006
Posts: 723
|
 Posted: Wed Feb 18, 2009 1:57 pm Post subject: Re: Fuel Pump Requirements on a Low Wing 601 |
 |
|
I know what you're saying, I'm familiar with 2-cycle vs 4-cycle engines. I'd still be interested in experimenting with it and seeing what gives. It may in fact work with some thinking. I know when I was working on my pickup truck a few months ago farting with the emissions that when you take off the oil cap there's quite a pressure pulse there. That's meant to be a closed system. There may in fact be enough of a pressure pulse to drive a fuel pump like that. Obviously in a two stroke engine even the crankcase chambers are seperated from each other, so the pressure pulses will be quite intense and not subject to dilution across cylinders. But the pulse I was getting out of the open oil cap on my truck was still pretty impressive and I would venture to guess could still drive that style of fuel pump.
[quote="n801bh(at)netzero.com"]They will not work on 4 stroke engines... They need the pressure pulses that 2 strokes have in their crackcases...
do not archive
Ben Haas
N801BH
www.haaspowerair.com
-- "ashontz" <ashontz> wrote:
--> Zenith-List message posted by: "ashontz" <ashontz>
Just an off suggestion that someone may be able to make use of, but, OMC (Evinrude, Johnson) outboard engines use a vacumm operated pump, essentialy it's mechanical. A new one can be had for around $90 or less and merely operate off of a reciprocating vacuum. The vacuum line hooks directly to the crankcase in an outboard engine installation and the varying pressure of the back of the cylinders going up and down cause the diaphram in the pump to move and pump fuel as long as the engine is turning. These things are extremely reliable, I'm just wondering where on a 4 cycle engine this could be hooked up, there may actually be enough suction/pressure with it hooked up directly to the crankcase as well. Just a suggestion I figured I'd throw out there. I'm going to experiment with it myself. Never had one fail on me, and I haven't owned or bought an outboard that wasn't more than 20 years old, and operated them for years without the pumps giving me problems, so who knows how old t!
he pumps are, could have been original, still with no problems. And the engines I've been running are in the 140hp range, which are quite thirsty, so the pumps are easily up to the task.
--------
Andy Shontz
do not archive
CH601XL - Corvair
www.mykitlog.com/ashontz
Read this topic online here:
http://forums.matronics.com/viewtop================================================-= --> http://www.matronics.com/Navigator?Zenith-List
____________________________________________________________
[url=_blank]Compare rates from Americas top life insurance providers in 30 seconds[/url]
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
