fuel pump ques?
- Thread starter syco 2
- Start date
Turbo6
10.20@131.8
Re: fuel pump ques?
I ran 122 mph in the 1/4 making 450 whp on the stock motor. It had stock wiring/voltage going to the 255. When I did the new motor I put on an MSD voltage booster with a 10 ga. wire and I'm running it at 17v at WOT. Its running 108+ mph in 1/8 and making about 550whp at 26 psi with no problems so I dont think a 20g will come close to maxing out a 255.
sy#276 said:
I ran 122 mph in the 1/4 making 450 whp on the stock motor. It had stock wiring/voltage going to the 255. When I did the new motor I put on an MSD voltage booster with a 10 ga. wire and I'm running it at 17v at WOT. Its running 108+ mph in 1/8 and making about 550whp at 26 psi with no problems so I dont think a 20g will come close to maxing out a 255.
dgoodhue
BuSTeD 4.3
Re: fuel pump ques?
It is sort of is double sided question.
The higher the fuel pressure the less fuel the pump can supply. Since we have a rising rate fuel pressure regulator, if the base fuel pressure is at 45psi it will be at 70 psi with 25psi of boost. A Walbro really start to drop off at 80 psi (even the high pressure model). The main reason (note: not only reason) to run higher base fuel pressure is to allow smaller injectors to supply more fuel. If you keep the fuel pressure reasonable, I have notice 600hp is do able with an intank fuel pump. Will a walbro produce enough fuel at 75 psi to feed 600 hp I really don't know, but I would guess at 80psi it would be a crap shoot. In theory suposedly at 40-50psi at walbro will supply 800hp, but I don't think the rest of the fuel system is upto that task.
sy#276 said:
It is sort of is double sided question.
The higher the fuel pressure the less fuel the pump can supply. Since we have a rising rate fuel pressure regulator, if the base fuel pressure is at 45psi it will be at 70 psi with 25psi of boost. A Walbro really start to drop off at 80 psi (even the high pressure model). The main reason (note: not only reason) to run higher base fuel pressure is to allow smaller injectors to supply more fuel. If you keep the fuel pressure reasonable, I have notice 600hp is do able with an intank fuel pump. Will a walbro produce enough fuel at 75 psi to feed 600 hp I really don't know, but I would guess at 80psi it would be a crap shoot. In theory suposedly at 40-50psi at walbro will supply 800hp, but I don't think the rest of the fuel system is upto that task.