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Thu Jan 31, 2008 8:01 pm

I see that CB carries a rotary fuel pump that's pretty quiet, what I'm running now is a Carter mounted on the front body area (firewall) across from the m/c, but what I did was mount it on a 1/4" piece of rubber to isolate the sound from the interior I thought....but this baby is noisy, real noisy
and I'm tired of it....is it the pump or where I mounted it, if it's the pump I was thinking of using the CB rotary unit instead but mount it on the bulk head away from the body...and which one should I buy the 3 1/2 psi or the 5 1/2 psi pump, it's for dells and I'll still run a regulator...thanks

Thu Jan 31, 2008 8:07 pm

I recently installed one of those in a customer's 70SC with a 2275... it's loud and way over kill.

Get the CB rotary and the 3psi will do just fine with carbs.

Thu Jan 31, 2008 8:17 pm

thanks Glenn, yeah I thought I did everything right when I installed it, but it's just to noisy...every time someone gets in for a ride...they say...WHATS THAT SOUND

Thu Jan 31, 2008 9:23 pm

I thought the CB pump was a Carter?? I do alot of isolation on electric equiptment, like big contactors on elevators.

You should be able to isolate the pump with some good rubber isolators and remember the bolts cannot touch the metal frame of the car. The mounting holes on the car must be wider then the bolts and the bolts cannot touch the sides of the hole or they will transmit the sound. Then you can also wrap the pump in sponge rubber. I have a carter and I can only hear it if the car is not running, and then only clicks till the carbs are full.

Thu Jan 31, 2008 9:50 pm

I am using one of those big carters to pump solvent on my parts cleaner. Yeah, it's pretty noisy.

The quietest setup I've done so far is the smaller rotary carter, mounted in bubble-wrap, then stuffed in a tennis-ball tube and strapped to the front beam :lol:

Max

Fri Feb 01, 2008 7:47 am

I've used this pump on 2 cars, my 74 std beetle stock engine, and a Porsche speedster replica with a 1835cc motor and dual 36 dellorto's, and i must say it's an awesome QUIET pump. http://www.cip1.ca/ProductDetails.asp?ProductCode=ACC%2DC10%2D5630

best of all it's a rotary pump, so when it's off, it's like an open hose, which really helped with the hot shut off condition, and solved the problem of excessive fuel pressure on hot shut off (with the dual 36 dellorto's), overcoming the float valves. Plus it's internally regulated to 2.5-3psi, and when i tested fuel pressure it was about 2.8 psi on both pumps. It's really small, fits perfectly on the "slelf" opposite to the master cylinder....it's a regulator and pump all in one unit....when it's primed (running) it's virtually silent.. 8)

Fri Feb 01, 2008 8:33 am

74bug wrote: I've used this pump http://www.cip1.ca/ProductDetails.asp?ProductCode=ACC%2DC10%2D5630
I am using this pump as well w/ a Rabbit fused cut-off relay, and it's extremely quiet.
My only issue with this are the hose connections.
They are molded as part of the entire pump casing which is made of plastic, and the ends are also a bit shorter than I would prefer for the fuel hose connections.

Fri Feb 01, 2008 8:38 am

74bug,

That pump sounds interesting.... I'll be running Kadrons, which seem to like about 2.5 psi. I checked your link and found the photos to be hard to see. Maybe you could answer some questions for me...

Are the inlet and outlet of this pump threaded, or are they barbed fittings? I want to be able to use A/N fittings at the pump (and everywhere else, for that matter). Also, the photos made me think the pump body was plastic. Is that true, or is it metal? What is that thin vertical thing sticking up from the pump body? (Having thought about that a bit, I'm wondering if it might be the power wire.....)

Lastly, could you elaborate for me about the advantages of a rotary style pump and hot starting? I'd like to understand that better. Thanks!

Fri Feb 01, 2008 8:42 am

I run a holley electric pump on my bug and it doesn't seem to be very loud.

Fri Feb 01, 2008 8:56 am

mailman wrote: 74bug,

That pump sounds interesting.... I'll be running Kadrons, which seem to like about 2.5 psi. I checked your link and found the photos to be hard to see. Maybe you could answer some questions for me...

Are the inlet and outlet of this pump threaded, or are they barbed fittings? I want to be able to use A/N fittings at the pump (and everywhere else, for that matter). Also, the photos made me think the pump body was plastic. Is that true, or is it metal? What is that thin vertical thing sticking up from the pump body? (Having thought about that a bit, I'm wondering if it might be the power wire.....)

Lastly, could you elaborate for me about the advantages of a rotary style pump and hot starting? I'd like to understand that better. Thanks!

I have to agree with Mark, i wish the fittings were a little longer, but they do hold the stock braided fuel line very well with a thin clamp, or even a zip tie.

the thin line that's vertical in the pic is actually the power wires, it comes with isolation mounts (soft rubber like plastic) and the fittings are barbed. the pump body is plastic, but i must say the pump is VERY high quality, and so far the best pump I've ever seen. It has an internal filter, but i put another filter in front of the pump, it also comes with a restrictor for a return line if you wish to do so, but i didn't install it....

With dual carbs (being so close to the head) when you shut the motor off and the motor is HOT, typically you get heat soak and that causes the fuel to boil in the carbs, pressure increases, and eventually overcomes the float valves in the carb dumping fuel down the cylinders (not good) since a stock pump does not allow fuel to flow backwards, the excessive fuel pressure builds up until something gives....then you have an empty carb bowls, and tonns of fuel in the cylinders.....that rotary electric pump when it's off is free flowing when it's OFF, which means when you shut down the HOT motor, the fuel is able to flow back into the fuel tank...and the benefit of an electric pump is when you try to restart that HOT motor, you just turn on the ignition and let the pump fill the carbs for a few seconds and then it just starts right up. The best part of this pump is that it's internally regulated, so there's no need for an external regulator. It's better, almost mandatory to install it close to the fuel tank, as it can't pull gas well, but pushes the fuel, like almost most electric pumps do...So you won't be able to install AN fittings on this pump, but it's in the front shelf near the master cylinder (opposite side) and totally out of view. I played all these games on the dual dellorto's, fuel pressure regulator, shimmed the stock pump, ect....nothing worked perfectly, this pump solved all my problems, the motor ran totally differently with this pump, flawlessly......best part is that there's no need to run a return line to the tank for a true system that deals with heat soak/vapor lock....which would require a second regulator on the return line to do it properly.

Fri Feb 01, 2008 9:29 am

74bug,

Thanks for the information on rotary pumps as they relate to hot starting...I learn something new here every day! :D

As great as this pump sounds, I don't think its right for me. I don't like the idea of the plastic pump body, for one thing, and I am absolutely set on A/N fittings throughout the entire fuel system...even the filter. I've already installed the A/N adaptor to the bottom of the fuel tank and added A/N fittings to the carbs. The entire system will be plumbed with either hard lines or braided stainless.

I understand that rubber lines are less expensive, and work well if used with clamps, etc. I'm just set on A/N fittings for this build.

I'll keep looking for a rotary electric fuel pump that has threaded inlet/outlet and a metal housing...hopefully at a delivery pressure near 2.5 psi.....

Fri Feb 01, 2008 10:16 am

mailman - i guess if you must have AN fittings then this pump wouldn't work for you. I did do some research on this pump before i bought it and found it's made by fuel flo, an OEM manufacturer of fuel pumps for SAAB and other big names. I guess that's why it's really good quality, in all my searches, for the $$ i couldn't find a better pump, except for the one CB has, but it too has barb fittings i think. You could go AN fittings and just use the pump barb fittings to a piece of hose, and then fittings, nobody would ever see it.

here is the website on that particular pump: http://www.fuelflow.co.nz/pump.htm

8)