Advice on fuel pump
 

Hey guys Im looking for some advice on mechanical fuel pump, brand and size.I am running about 565 HP carbed and I am currently running Holley red electric pumps.I dont feel the electric are very reliable so over the winter I would like to switch to mechanical.My next issue is I am running a gen 4 and a gen 5 so I need a matching pump to use on both engines.One last question is it OK to run+ a mechanical pump after the fuel filter?

Thanks Nordic95

Best to push through a filter as pump design is not to pull but to push. Next, good pumps that I have used personally and can recommend is the Holley marine pump (coast guerd approved) and also the Carters that flow 172 GPH but the Carter is non- marine. I use it now on my 900 HP blown engine.

Anyone have pictures of there set up with the high performance pump and then the filter to carb.I'm just trying to get ideas.


Thanks Nordic95

Check out the CV Products billet mechanical pump (Gen IV type block mount). It will work without a regulator and will support 750 HP at 6+ lbs FP and idle at 8 lbs (you want the green spring).
It is a little pricey, but this is a great piece. It is now offered in a marine verison.

Wow they are pricey.I would need a brand that offers both gen 4 and 5,even though water pumps dont match I would like fuels pumps to be the same brand and model.

Thanks

i agree with benperfected . the c.v pump is awesome and it can be mounted after the filter. i used this pump with a ramco man. fuel water filter which filters down to 1 1/2 or 2 micron with no problems. and this pump is feeding a 1200++ h.p engine.

Can I also use the same pump on a gen 5 water pump style mount?

Thanks Nordic95

With the Gen V, you're not going to be able to run a block mounted pump.
If you want both motors rigged the same, buy a set of water pumps made for the attached fuel pump.
The stock merc fuel pump should easily be able to handle that hp. You can also use the merc stock fuel line with this.I hear you can run an aftermarket by changing the pump arms, but I've never done it.
As for a filter, Mercs fuel water separator, mounted betwen pump and tank, works pretty well as a filter.
The Weber/carter carbs also have a small screen filter at the inlet. I've seen very little material in these filters after rebuilding, even after 1000 hrs use.
Simple, stupid solution, with availale, stock parts.

Try KEPP and see what they have. They sell an upgrade kit for the Gen V sea pump mounted FP that increases the GPH. I expect they may also sell a matching Gen IV block mount FP of the same design.

Who is Kepp?

Nordic95

What do you live in a shoe????

http://www.keitheickert.com/default.aspx?Affiliate=1

Dude I never heard of them being refered to as KEPP.Wait till I have that motor of yours locked in my garage,then you and Hot Boat will have to give me some respect.:p

Nordic95

Nice try.....I already stole a key!! You haven't been missing any tools lately?

There was a smart lady who lived in a shoe..... she had so many friends motors(in the garage) she didn't know what to do.....


EBAY-anyone???/:ernaehrung004:

Pleeeeees,like I know how to even use those tools nevermind notice them missing:DBesides the only tools I did notice missing were you and Hot Boat,its been really quite here lately,but I have a feeling that will all change soon:ernaehrung004:


Nordic95

I am running a Kieth Eickert pump bottom upgrade from CP Perf on my Gen V 454. I draw through a BIG Wix water separating filter with -8 lines all the way from the pick up to the carb. This pump makes 6.5 psi except at WOT where it drops to 3. I have mixed feelings about it, as the pressure drop is a concern. My motor doesn't lean surge (plugs look fine) and seems to run fine so far. Its a 525sc with a small pulley and intercooler.

I think 3 psi at WOT is way to low.Mine with the electric holley red pump idles at 7 psi and drops to 5 at WOT and if I run for a long time at WOT my O2 sensors show it leaning out.This is also a reason for me to upgrade.Maybe some experts will give there advice on the 3PSI.

Nordic95

Navy,
I can see your concern. As you are not seeing signs of low pressure, I wonder if your FP gauge might be reading low at all pressure levels; 6.5 lbs at idle is also low.

As there seems to be a pressure doubt with the KEPP Gen V pump, maybe they would ship you one to try. If it doesn't hold 5.5+ lbs at WOT, you can return it for credit. If it works out, you agree to buy the second Gen IV pump.
All get to see the results on OSO. Either way, KEPP gets good press for good customer service.

LOL! Still runnin' my kids in tubes @ 18 MPH and 80 MPH @ 6,000 RPM/ blown 498 @ 8 psi on the Carter 10 psi on the 420 blower!!!.... How many years now????? KISS!