Thoughts on the FAST Ez-EFI system?? - Page 7 - Lateral-g Forums

**GregWeld** · #61 11-26-2009, 12:22 PM

Well -- The big fuel pump discussion here - had more to do with the GIANT fuel pumps the guys with the twin turbo 800+ HP motors... and the fact that they are / were pumping huge amounts of fuel on a continuous basis... pumping the same amount of fuel even when "cruising" and stop and go traffic etc.

I've been running an EXTERNAL fuel pump on a 25 gallon Rock Valley tank for almost 5 years now - without any issue. My motor is more "normal" and I'm not running the super mondo 1000 gph pump etc.

Just my .02 worth

rwhite692 · #62 11-26-2009, 12:32 PM

I am going to follow Jody's advice and bypass back at the tank. I am running an A1000 (externally mounted / using a Rick's tank) and will probably use the Aeromotive PWM controller, although I have heard of a couple of failures which is a bit concerning.

**GregWeld** · #63 11-26-2009, 01:21 PM

Rob --

I liked the system that Professional Products was using for their controller... they were using a vacuum reference and a pressure sender rather than a tach reference for slowing the pump when lots of fuel wasn't needed. I talked to them at length and it made total sense to me.

Their point was that the Aeromotive controller used a tach reference -- but there are times when you have a "low" tach reading but might need lots of fuel - such as climbing a long grade.. in a higher gear. The Pro system used the two senders - vacuum (think open throttle) and pressure - to maintain pressure at all times. Weldon also makes a "programable" PWM controller.

We also discussed fuel pumps and the two guys that were in the booth at SEMA liked the Mallory geroter over any of the others or styles.

Something that we kind of "forget" about when using these high volume - high pressure pumps.... FUEL "boils" easier at high pressure - the exact opposite of water under pressure... so the more pressure we make the easier it is to get the fuel aerated... add some heat from the fuel rails - and the heat the pump makes in making pressure - some road heat in stop and go traffic and the next thing you know - you've got some fuel problems.

Mark has done a ton of work on this... and certainly knows what he's talking about. My big question on this subject though is - if you're running some "normal" horsepower... and a smaller than maximum pump (not the Aeromotive A1000 for example) then is this still an issue?

I also run SS hard line from the tank (well - except for some FTE braided for flexing) and for the return as well... and I wonder if this doesn't help dissipate the heat?

Just for what it's worth...

**GregWeld** · #64 11-26-2009, 01:35 PM

CORRECTION -- it was RETROTEK that has this fuel controller system....

I remember now too - that they made another point about their system. You didn't need a return line - because they ran the pump just enough to fuel the engine rather than just flowing fuel as fast as the pump could run...

Pantera EFI · #65 11-26-2009, 02:29 PM

Would you consider a NASCAR fuel pump ?

They can be sized for the correct volume with the price equal to a big Aeromotive/dual pumps.

These pumps produce no heat except for the compression of the fuel.

When you choose a fuel pump, do an INSPECTION inside of the pump, most would be surprised.

My pump features a sealed, smooth armature (no windings visible), speed balanced, greater pole count
with 2x the brush area of the common "brand name" pump.
Many OEM pumps also have these features.

Lance

sacarguy · #66 11-30-2009, 10:42 AM

This is what i do for a livng build huge horsepower daily driven efi cars.

I personaly have over 5 years and 70 thousand miles on a fuel system that will suport 1000 horsepower without any tricks and i have literaly over 75 customers runing the same system in their cars.

its very simple. and very quiet and cheaper then any of the big pump stuff.

Just take two external bosh 255 efi pumps run a -6 line to a y then -6 to them and then -6 back to a second y then a single -8 feed to the front and a -6 return using any return style efi regulator.

its as reliable as any stock fuel system as they are stock type bosh pumps meant for continual use over years of duty service.

its when peoeple try to use the big race only aftermarket fuel pumps that were meant for low duration use that the problem comes in.

**GregWeld** · #67 11-30-2009, 12:41 PM

Not to doubt you -- but your post leaves me wondering....

Walbro makes a "255" pump -- not Bosh.

BOSCH has an equivalent pump. It's an O44....

Novelli · #68 11-30-2009, 05:47 PM

Just installed one on a 69 Camaro. The computer took a crap before I was able to even fire the car. FAST said they had a prob with some of the computers. Recieved the new one and was not able to get fuel to the injectors, ends up there wiring harness pig tail that hooks to the fuel pump was wired backwards, not to happy with that, but I will let you know more when I drive it some more.

**GregWeld** · #69 11-30-2009, 06:03 PM

Yep -- Let's ship some more of our manufacturing to... where? China? Taiwan?

wiedemab · #70 11-30-2009, 07:35 PM

Quote:

Originally Posted by Novelli

Just installed one on a 69 Camaro. The computer took a crap before I was able to even fire the car. FAST said they had a prob with some of the computers. Recieved the new one and was not able to get fuel to the injectors, ends up there wiring harness pig tail that hooks to the fuel pump was wired backwards, not to happy with that, but I will let you know more when I drive it some more.

Damn, that is disappointing. Keep us posted. I hate having to get 2 or 3 of something before you get a good one. It makes you wonder............... Do they do any quality checks. For a part of this cost and the relatively low volume compared to other electronics I would think they could afford to do 100% inspection. Even more so if it is being made in a low(er) labor cost country.