Aftermarket Fuel pump debate.
Joined: May 2002
Posts: 5,972
Likes: 37
From: Ottawa, Soviet Canuckistan
In Canadian Pesos it cost me $240 for the pump (plus tax) and $33 for the regulator (plus tax).
And that was at a local performance parts place that had them in a day later.
Jon
And that was at a local performance parts place that had them in a day later.
Jon
Joined: May 2002
Posts: 5,972
Likes: 37
From: Ottawa, Soviet Canuckistan
To bring this thread back and make a quick update:
My Mallory can't be heard at all when the car is running. The car has stock exhaust, and thus is quiet. I haven't been able to see how it is at idle because.. . well my car won't idle right now!
When the car's running properly I'll re-update... to post ***** a little more and tell you if I can *ever* hear the pump or if I can just forget about it.
Jon
My Mallory can't be heard at all when the car is running. The car has stock exhaust, and thus is quiet. I haven't been able to see how it is at idle because.. . well my car won't idle right now!
When the car's running properly I'll re-update... to post ***** a little more and tell you if I can *ever* hear the pump or if I can just forget about it.
Jon
There were a lot of fuel pump threads, so I just picked a random one to dig up.
My question: Will a Mallory Comp70 be enough for an "agressively" streetported 12a with a Mikuni 44? It needs to be good for very high RPMs (obviously).
Also, what would be a good FPR to go with it? I've seen people mention a Holley 1-6 psi model, but all I can find are 1-4 psi models.
My question: Will a Mallory Comp70 be enough for an "agressively" streetported 12a with a Mikuni 44? It needs to be good for very high RPMs (obviously).
Also, what would be a good FPR to go with it? I've seen people mention a Holley 1-6 psi model, but all I can find are 1-4 psi models.
Joined: May 2002
Posts: 5,972
Likes: 37
From: Ottawa, Soviet Canuckistan
Yup 
I've now put 12,000km on my Mallory, and I can honestly say that it provides way more than I need. If you want the extra assurance that it will be enough, get the Comp110 because it's usually not too much more. If you keep an eye on ebay you can get them cheap
(I originally mounted my first mallory 1" from the cut-valve.. bad idea... so much restriciton and back pressure that I blew the pump. I bought another one on ebay for $85. Much cheaper than my first one! Plumbed it right and haven't had a problem since!)
And it's still so quiet I can't hear it at idle. Only just after cranking (if it doesn't start), or on shutting down... if everything's really quiet at night. And I've got stock exhaust!
The Holley FPR is actually 1-4psi. With the Mikuni I don't know what fuel pressure you're aiming for, but I'm using the Holley 1-4psi FPR and am very satisfied with it. Good quality, especially compared to those "dial" style FPRs like the one in Victoria British.
The only thing is that if you want accurate read on fuel pressures of 6psi or below, it's a bugger to find a good quality gauge that reads it correctly. Yaw had a long article way back when that talked about how gauges work, but suffice it to say that any 1-15psi gauge will NOT be accurate. Mine doesn't even get a reading when I have the regulator wide open at 4psi, the gauge reads 0. I think Yaw still sells his high-quality 1-4 or 1-5psi gauges, but I don't know. You can get them at industrial supply places. I think Carl is trying to source some too.
Jon
I've now put 12,000km on my Mallory, and I can honestly say that it provides way more than I need. If you want the extra assurance that it will be enough, get the Comp110 because it's usually not too much more. If you keep an eye on ebay you can get them cheap
(I originally mounted my first mallory 1" from the cut-valve.. bad idea... so much restriciton and back pressure that I blew the pump. I bought another one on ebay for $85. Much cheaper than my first one! Plumbed it right and haven't had a problem since!)
And it's still so quiet I can't hear it at idle. Only just after cranking (if it doesn't start), or on shutting down... if everything's really quiet at night. And I've got stock exhaust!
The Holley FPR is actually 1-4psi. With the Mikuni I don't know what fuel pressure you're aiming for, but I'm using the Holley 1-4psi FPR and am very satisfied with it. Good quality, especially compared to those "dial" style FPRs like the one in Victoria British.
The only thing is that if you want accurate read on fuel pressures of 6psi or below, it's a bugger to find a good quality gauge that reads it correctly. Yaw had a long article way back when that talked about how gauges work, but suffice it to say that any 1-15psi gauge will NOT be accurate. Mine doesn't even get a reading when I have the regulator wide open at 4psi, the gauge reads 0. I think Yaw still sells his high-quality 1-4 or 1-5psi gauges, but I don't know. You can get them at industrial supply places. I think Carl is trying to source some too.
Jon
Here's an update on the Carter situation. It was actually quite loud in that car. The pump bracket was mounted on the underside of the rear hatch and the sheet metal sort of amplified the noise. It was very annoying so I removed it. I replaced the Carter with a Walbro 255lph (for EFI) and went to great lengths to keep it quite. The result was dramatic; much quieter. I can actually stand to be in the car when the pump is running. The exhaust is also a whole lot quiter, because I actually finished it. Heh.
I installed the Carter in my REPU and the bracket is bolted to the frame through some rubber stand-offs and it is now as quiet as the Carter on my other REPU. The noise went from a horrible EORRR! sound to a quiet buzzing sound. It's not unpleasant. The next thing I might do would be to run a new power wire to it because the 16 guage wire is pretty old and fairly thin for such a powerful pump. I'm thinking 14 guage or thicker and maybe a relay too.
I installed the Carter in my REPU and the bracket is bolted to the frame through some rubber stand-offs and it is now as quiet as the Carter on my other REPU. The noise went from a horrible EORRR! sound to a quiet buzzing sound. It's not unpleasant.
The next thing I might do would be to run a new power wire to it because the 16 guage wire is pretty old and fairly thin for such a powerful pump. I'm thinking 14 guage or thicker and maybe a relay too.
Last edited by Jeff20B; Sep 25, 2005 at 12:21 PM.
Lives on the Forum
Joined: Jun 2004
Posts: 11,359
Likes: 14
From: Grand Rapids Michigan
Alien RX-7 has a carter on his too. When he was idling next to me, I could hear his pump running over my own idle noise. It is extremely loud.
This deal with the rubber bushings though, I'm wondering if that's why so many people are going through pumps all the time. You figure if the pump is vibrating that hard, and you bolt it down in a solid manner which doesn't allow any play, then all that energy will have no place to go and will shake the pump apart internally. You think?
This deal with the rubber bushings though, I'm wondering if that's why so many people are going through pumps all the time. You figure if the pump is vibrating that hard, and you bolt it down in a solid manner which doesn't allow any play, then all that energy will have no place to go and will shake the pump apart internally. You think?
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