Aeromotive 340 Stealth Fuel Pump. Anyone use one yet?
- Thread starter KevinB
- Start date
What was the issue? Performance? Bad out of the box?
Base fuel pressure wont get down low enough....from too much flow at low pressures...this high flow when it meets any restriction causes a pressure rise.
TurboTnZ06
Go on red!
- Joined
- May 7, 2002
The restriction is probably inside the tiny fuel pressure regulator. Peek in one, you'll see how small they are.
IMHO.... that is not a fuel pump issue, it is a return path issue...... which up to this point..... has proven adequate for all other single in-tank pump setups I am aware of...... so IMHO... this is a good thing.... no? It would mean this pump IS flowing alot more fuel than the old 340's do......
you are coorect this is not a pump issue this is a return line issue. This problem is ok i wouldn't say its a good thing. It proves that the new pump is flowing more volume. Also if i remember right eric opened up the port in the regulator and its still not going down so this would prove that its a return line issue
just plain john
El Camino a Go-Go!
- Joined
- Feb 24, 2007
So you're saying this is too much pump for a car with factory fuel lines?
Any TB vendors selling this pump yet?
The Walbro pumps are probably good enough for most people until mid-low 11's. Only time we have issues with lack of return line flow is when we go double pumper. This might be why they are staged and only one pump runs until you go WOT.
The Walbro pumps are probably good enough for most people until mid-low 11's. Only time we have issues with lack of return line flow is when we go double pumper. This might be why they are staged and only one pump runs until you go WOT.
we are still waiting to find out. one car has had a problem.others have not. we will see in the coming months
pacecarta has solved the issue (DW pump tho, prob same thing) with an aeromotive regulator through stock lines...
I am wondering if there is anything that can be done about those tiny o-ring fitting restrictions on the connections on the stock lines...maybe drill 'em out...or replace the ends??
pmoore4321
Member
- Joined
- Jan 10, 2010
I'd like to know also. I'm having the same problem with my Denso Supra.
pmoore4321
Member
- Joined
- Jan 10, 2010
Yeah, the line is small to begin with and I think the junctions neck the line down even further. Has anyone ever ran a test on the flow of the lines? It seems like it would be easy to do if you had some spare lines and a rail.
I opened up the "necked down" part of my lines when I installed my new pump. I don't know if that made any difference, but my fuel pressure wont go down any further that 39 lbs with the Accufab or Kirban FPR.
Earl Brown talks about it here:
How to install an intank fuel pump. - TurboBuicks.com
I opened up the "necked down" part of my lines when I installed my new pump. I don't know if that made any difference, but my fuel pressure wont go down any further that 39 lbs with the Accufab or Kirban FPR.
Earl Brown talks about it here:
How to install an intank fuel pump. - TurboBuicks.com
The connections where the fuel line couples near the frame rail is quite small. God help you if you damage the return o-ring and need to find the correct size and material.
http://www.turbobuick.com/forums/general-turbo-buick-tech/216291-part-number-fuel-o-ring.html
Note: This is NOT the same as the injector rail o-rings.
http://www.turbobuick.com/forums/general-turbo-buick-tech/216291-part-number-fuel-o-ring.html
Note: This is NOT the same as the injector rail o-rings.
Not sure that it would effect the pressure, but definately the volume.
pump
I have a new one setting in the box and would like to install on the first week in march (have a week off to install new motor in car) has a pump of unknown origin in there now. i also have a new walbro I can use if there is going to be a problem with the fuel pressure and return line I'll wait and see the results here only want to drop tank once
I have a new one setting in the box and would like to install on the first week in march (have a week off to install new motor in car) has a pump of unknown origin in there now. i also have a new walbro I can use if there is going to be a problem with the fuel pressure and return line I'll wait and see the results here only want to drop tank once
- Joined
- Aug 1, 2003
i posted this response only last month on subject of fuel line o-rings
advance or any other parts store
BWD 27478 (borg warner)
also same part# 27478 for neihoff brand
heres a link with pic http://shop.advanceautoparts.com/we...-BWD_20960843-P_674_R|GRPFUELAMS_569659965___
Similar threads
