matthon
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- Aug 29, 2008
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Riddle me this in-tank pump manufacturers and vendors -
For an EFI conversion, it is recommended to use the best of the best for the fuel system, for performance, longevity, and safety.
Depending on the company, or the consumer's opinion, there are many factors and requirements.
For example, and I'm not being too specific here, the type of fuel line, fittings, pump, o-rings/seals, routing of lines, etc.
In my case, AN fittings, braided stainless teflon fuel line, 90 gph/340 lph pump, filter, regulator, wiring, etc.
So why with the in-tank pumps do the manufacturers, Holley, Hyperfuel, Aeromotive, TanksInc, and others, I'm talking to you, use a rubber efi hose from the pump to the underside of the housing, with either a clamp and a clamp, a clamp and a barbed/press/push-lock fitting, or a nylon hose with a clamp?
In the most inaccessible place in the entire system, with the highest fuel pressure in the system, before the regulator, in what universe does it make sense to run a hose with clamps?
Use our super fantastic braided hose, our ridiculously priced fittings, and our tools to put it all together, don't skimp here, no, you'll regret it, your safety depends on it.
Oh, the in-tank pump? Here, we've supplied you with this sate of the art aluminum housing, machined by high tech computer controlled equipment for accuracy, AN fittings for a leak proof union, and a ridiculous pump that has so much psi you'll never need and will explode even your existing fuel line if you use it as a return.
And here's a Fisher Price fuel line and clamps, or not, to connect our super pump to our super housing.
I've been dealing with this issue, unbeknownst to me, since day one.
The upper end of my hose has a barbed/push-on fitting where the hose slides on, and you cannot pull it off, with a clamp on the bottom. A clamp will not fit at the top, and a clamp on that fitting doesn't seem correct to me.
Hoses expand, get soft, burst.
Clamps fail, ruin hoses.
In my case, the barbed fitting comes to a point, the hose goes over it which leaves a space between the opening and the hose. Hose gets soft, expands. I've removed it enough times to tell you the short length of hose is much softer than the original hose.
Add 100+psi, how long before it pushes past the barbs?
Answer: 20 minutes from 58psi at the throttle bodies to 40psi, another 10 minutes gets you 24psi.
In my case, the manufacturer has been very helpful, and is sending me a different, longer upper fitting, different clamps, and new hose, however I'm going to see if I can locate my own fitting just to compare.
Still weary about clamps on both ends.
Just an FYI to those who may be experiencing fuel pressure issues, or an unknown issue.
In my case, me and my ecu were compensating for an AFR that was too lean, and they replaced the pump twice. I had a pressure gauge which was giving me a bad reading, also it was not liquid filled. I had ordered the wrong one and it took a while for the other one to arrive, and for me to get off my butt to install it.
It wasn't until I loosely set the housing/pump in the tank that I noticed the issue, as gas sprayed out horizontally between the housing and the tank.
For an EFI conversion, it is recommended to use the best of the best for the fuel system, for performance, longevity, and safety.
Depending on the company, or the consumer's opinion, there are many factors and requirements.
For example, and I'm not being too specific here, the type of fuel line, fittings, pump, o-rings/seals, routing of lines, etc.
In my case, AN fittings, braided stainless teflon fuel line, 90 gph/340 lph pump, filter, regulator, wiring, etc.
So why with the in-tank pumps do the manufacturers, Holley, Hyperfuel, Aeromotive, TanksInc, and others, I'm talking to you, use a rubber efi hose from the pump to the underside of the housing, with either a clamp and a clamp, a clamp and a barbed/press/push-lock fitting, or a nylon hose with a clamp?
In the most inaccessible place in the entire system, with the highest fuel pressure in the system, before the regulator, in what universe does it make sense to run a hose with clamps?
Use our super fantastic braided hose, our ridiculously priced fittings, and our tools to put it all together, don't skimp here, no, you'll regret it, your safety depends on it.
Oh, the in-tank pump? Here, we've supplied you with this sate of the art aluminum housing, machined by high tech computer controlled equipment for accuracy, AN fittings for a leak proof union, and a ridiculous pump that has so much psi you'll never need and will explode even your existing fuel line if you use it as a return.
And here's a Fisher Price fuel line and clamps, or not, to connect our super pump to our super housing.
I've been dealing with this issue, unbeknownst to me, since day one.
The upper end of my hose has a barbed/push-on fitting where the hose slides on, and you cannot pull it off, with a clamp on the bottom. A clamp will not fit at the top, and a clamp on that fitting doesn't seem correct to me.
Hoses expand, get soft, burst.
Clamps fail, ruin hoses.
In my case, the barbed fitting comes to a point, the hose goes over it which leaves a space between the opening and the hose. Hose gets soft, expands. I've removed it enough times to tell you the short length of hose is much softer than the original hose.
Add 100+psi, how long before it pushes past the barbs?
Answer: 20 minutes from 58psi at the throttle bodies to 40psi, another 10 minutes gets you 24psi.
In my case, the manufacturer has been very helpful, and is sending me a different, longer upper fitting, different clamps, and new hose, however I'm going to see if I can locate my own fitting just to compare.
Still weary about clamps on both ends.
Just an FYI to those who may be experiencing fuel pressure issues, or an unknown issue.
In my case, me and my ecu were compensating for an AFR that was too lean, and they replaced the pump twice. I had a pressure gauge which was giving me a bad reading, also it was not liquid filled. I had ordered the wrong one and it took a while for the other one to arrive, and for me to get off my butt to install it.
It wasn't until I loosely set the housing/pump in the tank that I noticed the issue, as gas sprayed out horizontally between the housing and the tank.
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