Repeatedly Running On A Low Tank?

a couple of grams. diamond is better than silica though. seriously,
one of my old profs had done some research on using 0.25 micron diamond
polishing dust in new engines. apparently it reduced wear and decreased
friction substantially. wish i had the data.

you didn't - they lasted that long in spite of your treatment, not
because of it.

swri is bogus???

 

i'm talking about the sucking side, not the pushing side. if you suck
hard enough on any liquid, the column separates. if it's a liquid full
of volatiles, especially on a hot day at high altitude, you'll not have
to suck very hard. hence you attempt to keep the column rise as close
to zero as possible. putting the pump down in the tank achieves exactly
that.

its definitely part of the picture, but it's not the full story - you
could easily mount such an assembly on the engine.

 

Not at all. I didn't want your head to explode by jamming three concepts
into it at once.

And here I am trying to be considerate...

 

pfft.

 

Bet you like hitting yourself in the head with a ball-peen hammer, too...

 

I have no experience with fluid dynamics so I'll have to take your word
about the phenomenon. I would imagine that while 40+ PSI is enough to
prevent vapor lock on the pushing side, it isn't enough to cause the column
separation that you are describing since I've never heard of that happening
either. Wouldn't increasing the diameter of the suction side reduce the
pressure and therefore the tendency of the column to separte? If so, it
seems like that would be a simpler solution than re-designing the fuel pump,
tank, and mounting hardware.

In other words, it seems to me that lowering assembly costs would be the
primary reason for mounting the fuel pump in the tank, and reducing the
phenomenon you are describing would be a secondary side benefit.

 

You must have not read where I wrote in what you quoted "...The small
amount generally does not overload the fuel and is able to be handled
without noticeable symptoms. In some colder climates, it might be
advisable to put in a can of Dri-Gas periodically. Also - don't forget
plastic tanks (that don't rust..."

Tanks today are plastic, right? I agree that in the past it would have
been a much bigger problem.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

Most in-lines I've seen were near the fuel tank (to - as you say - avoid
vapor lock). The integration of the pump into the sending unit had
different motivations than what were already met with in-line pumps.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

Heat is the enemy, and the primary cause of vapor lock - but - yes - the
negative pressure also would contribute to vapor lock.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

please try to think rationally for a moment - you're again projecting a
problem /you/ have, onto a third party. in this case, a third party
you've never met. is that the way you want to keep on living your life?
at this juncture, professional help is probably your best option.

 

I dunno about the K&N filters...

I had a '95 Tercel, and got a cold air intake for it for $50. Now, I
didn't put a K&N on it, but it was a similar filter, and my gas mileage
went from ~40 to ~45 MPG. And I did notice a better throttle response off
the line, too.

 

Not at all. After all, you keep responding, don't you?

 

you'll never have a chance of fixing a problem if you don't realize you
have one. you have a problem. go fix it.

 

So on one hand, you're saying gasoline flowing through the pump is enough
to cool it, and then you say gas isn't efficient enough at cooling?

Stop and think...maybe that's why they put them in the tank.

Put the ball peen hammer away.

 

lack of comprehension. projection of own inadequacy. get help.

 

I'm trying, but you keep coming back for more...

 

You can't even remember what you said 5 posts ago,,,

 

And more dirt was ingested by the engine, which is OK as long as you
realize the tradeoffs in making the decision to use it. Problem is,
most people believe the advertising hype but are ignorant of its
inferior dirt-catching qualities.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

Carbone of America. U.S. division of French-owned Carbone Lorraine.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

 

In my neck of the wodds it seems to be mostly Gilbarco.

These look nothing like the pump filters I was shown. The filters I saw
more resembled a larger and somewhat coarser version of the basket
filter that goes in some Toyotas' windshield washer reservoir filler
necks.

It was explained to me that the primary problem with underground tanks
is not dirt or rust, but stirred-up water in freshly-filled tanks.
Apparently tanks are supposed to be taken offline for a couple of hours
to let water settle out, but nobody actually does that. Gas stations do
not filter water out, it seems.

I see similar ones, but the ones I see are a much lighter green, even
almost white.