Fuel pump advice

[bocco]

I think I'm due for a new fuel pump in 20' V-drive day cruiser. I'm feeling a little surge when running wide open and if I watch the pressure guage it drops from 7.5psi at idle to about 2psi at full throttle. The engine is a 454 at about 400hp. Runs about 5000rpm wide open. The current fuel pump is whatever electric pump Eliminator was mounting on the transoms in 1981.

So the Summit catalog shows 2 Holley marine fuel pumps that look like they won't require any plumbing changes.

One is 67 gph @ 7 psi. The other is 70 gph @ 14 psi. I currently have pressure regulator. Which pump should I use and if I go with the 7 psi pump do I even need the regulator?

Or should I be looking at a whole different pump?

Thanks

Gary

[Norcal_73]

What are you running for a carb set-up?

[RiverRacer]

You're going from old junk to new junk, get a good mechanical and forget about it!..

[bocco]

What are you running for a carb set-up?

Single Holley 750 vacuum secondaries. RPM air gap manifold. Stock square port heads. Whatever cam Harmon Marine was sticking in 454s back in the 80s.

[bocco]

You're going from old junk to new junk, get a good mechanical and forget about it!..

Not sure I could even get a mechanical pump on to my motor with the log exhaust manifolds and how close the stringers are.

[Flatmvn]

If you are running a Electric pump already then go with the one in the link provided. I have run these pumps for years and they work great I am running the Higher volume one on my Blown 468 and I have plenty of fuel. Also with the carter you do not need the regulator so you can eliminate one thing that can go wrong.

Louis

http://store.summitracing.com/partdetail.asp?autofilter=1&part=CRT%2DP4070&N=700+115&autoview=sku

[RiverRacer]

Not sure I could even get a mechanical pump on to my motor with the log exhaust manifolds and how close the stringers are.

What kind of logs you got, never seen any that wouldn't fit with a mechanical pump!.:confused:

[gfinishline]

"SAE", one half pound of fuel per horsepower, per hour. (at sea level)