Belt Driven Fuel Pump for FI
+1
This especially true when you need to run higher fuel pressure and
E85 or methanol.
The output of the big electrics will drop bigtime when you get over 60psi, but the belt drives could care less about running at 150psi all day.
There are many 1,000 hp street cars running multiple in tank pumps with good reliability, but at this power level a belt drive will give you a much larger safety factor for adequate fuel supply.
I would always fear one of the dual pumps crapping out at WOT causing a melt down.
We all know how much a FI engine loves to run lean at wot!!!
These are not practical for every build, but for a streetable race car like I am building, it was a no brainer.
This especially true when you need to run higher fuel pressure and
E85 or methanol.
The output of the big electrics will drop bigtime when you get over 60psi, but the belt drives could care less about running at 150psi all day.
There are many 1,000 hp street cars running multiple in tank pumps with good reliability, but at this power level a belt drive will give you a much larger safety factor for adequate fuel supply.
I would always fear one of the dual pumps crapping out at WOT causing a melt down.
We all know how much a FI engine loves to run lean at wot!!!
These are not practical for every build, but for a streetable race car like I am building, it was a no brainer.
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
i know very little about mech. fuel pumps, but i do know most people on other application (smaller engines) tend to run electric pumps....
also are there any heating of the fuel issues with running the really high preusres mech. pumps can achive??
Cheers
Chris.
also are there any heating of the fuel issues with running the really high preusres mech. pumps can achive??
Cheers
Chris.
The big advantage to mechanical fuel pumps is that their flow rate is directly related to the motor RPMs. With electric fuel pumps, the flow rate is static across the RPM band. At idle an electric pump is pushing the same amount of fuel as needed at max RPMs, so the fuel is always pressured at the same amount defined by the regulator. This generates unnecessary heat at idle. Mechanical pumps are a little harder to tune since the fuel flow rate changes, but if you know what you are doing they are not too bad.
Joined: Nov 2001
Posts: 8,484
Likes: 0
From: Cecil County Raceway!!!
