Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   What fuel pump to use (https://www.offshoreonly.com/forums/general-q/249090-what-fuel-pump-use.html)

87MagnumII 03-09-2011 06:55 PM
What fuel pump to use
 
switching from mechanical to electric because my new block wont accept a mechanical. its 350 vortec sbc with lt4 hotcam, performer rpm intake, compression is like 9.8:1, and using a 650 demon carb. should be between 375 to 400 hp at about 5200 rpm. i was looking at the holley pumps and cant decide between the blue or the red. any input would be appreciated.

FIXX 03-09-2011 06:59 PM
Fixx
 
Originally Posted by 87MagnumII (Post 3346544)
switching from mechanical to electric because my new block wont accept a mechanical. its 350 vortec sbc with lt4 hotcam, performer rpm intake, compression is like 9.8:1, and using a 650 demon carb. should be between 375 to 400 hp at about 5200 rpm. i was looking at the holley pumps and cant decide between the blue or the red. any input would be appreciated.
neither,,a good cheep pump that will last woud be a mallory,,went through tons of holly pumps in the past and the mallory out lasts them by 100 to 1..

EXCESS ENERGY 03-09-2011 07:09 PM
4 Attachment(s)
Originally Posted by 87MagnumII (Post 3346544)
switching from mechanical to electric because my new block wont accept a mechanical. its 350 vortec sbc with lt4 hotcam, performer rpm intake, compression is like 9.8:1, and using a 650 demon carb. should be between 375 to 400 hp at about 5200 rpm. i was looking at the holley pumps and cant decide between the blue or the red. any input would be appreciated.
87 Magnum, I have 4 of these for sale Aeromotive pumps like now 20 hours time on them $120.00 each plus ride. Bob

Rookie 03-09-2011 07:40 PM
I use Mallory 140's (600HP) they are serviceable and inexpensive to rebuild. You could just run a 110 that is internally regulated to 6-7lbs

87MagnumII 03-09-2011 07:43 PM
ok so what kind of flow and pressure do you guys think i need?

Rookie 03-09-2011 08:59 PM
Originally Posted by 87MagnumII (Post 3346599)
ok so what kind of flow and pressure do you guys think i need?
Anyone correct me if I'm wrong.

400HP x .55 (BSFC)=220lbs/HR
Gas weighs ~6.2lbs/gal
220 / 6.2 = 35.5 gals/Hr
35.5GPH x 30% (safety factor) = 46.15 GPH
6-7PSI
Also fuel pumps are rated at free flow state. Flow and pressure are indirectly proportional. A 110GPH pump puts out about 90GPH @ 6PSI

87MagnumII 03-09-2011 09:23 PM
cool, thanks for all the input

DareDevil 03-09-2011 11:03 PM
I would go with one of those aeromotive ones and a nice good pressure valve !

motorz 03-10-2011 05:26 AM
Great pumps, no issues and reliable!

Originally Posted by EXCESS ENERGY (Post 3346561)
87 Magnum, I have 4 of these for sale Aeromotive pumps like now 20 hours time on them $120.00 each plus ride. Bob


All times are GMT -5. The time now is 02:49 PM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.