My dyno showed my A/F to be pretty lean. I am going to upgrade the pump. I was reading a little about the Walbro and there were a lot of complaints on the noise.
What other options are there out there?
What other options are there out there?
I am surprised that there are any complaints about the walbro. I have a 255 installed in my car and can never hear it. How much hp do you have and how much do you want? The walbro 255 is good for about 600 but that is the limit. The Bosch 044 is the one that I have heard is the noisy one.
What is the lph or litres per hour of this pump. This is important to know because if you are running lean now and this pump is the same as a stock pump then you will run lean with this pump also. I would not hesitate to use the Walbro 255 it is also comparable in pricing.
Dave, I have a walbro and the only time I can hear it is when it is on and the engine is not running. As long as you use the rubber isolator that comes with it, it's not loud.
I am surprised that there are any complaints about the walbro. I have a 255 installed in my car and can never hear it. How much hp do you have and how much do you want? The walbro 255 is good for about 600 but that is the limit. The Bosch 044 is the one that I have heard is the noisy one.
I started going lean up top at 535whp on a previous vehicle with a single Walbro 255. Modified the pump hanger to accept a second Walbro 255 and off we went. If you have one of the new 300lph pumps that have come out since you shouldn't be having this problem at the power level you're producing so there may be something else awry. What does your tuner have to say?
Tom
I was looking at getting one because I thought my car was running lean in boost. After talking to Shad it sounds like my numbers are normal for a ctsc with the readings taken at tail pipe. I am going to get an aem uego instead.
Are you back yet Gary?
Mase suggested i look at aeromotive fuel pumps. Anyone use these? I really only need more fuel above 7k rpm.
subscribing for this ^^^ !Stay tuned for some valuable testing we performed with fuel pumps and the NSX.
-- Chris
subscribing for this ^^^ !
related question... I am considering upgrading to the Walbro 255 for my NSX in prep for some type of engine build/FI in the future. I'm sure my 20yo OEM pump could use the break as well. On a stock engine I shouldn't induce any damage right? I assume the extra flow rate from the 255 will simply dump the unused fuel via the return line right? Any issues with the OEM Fuel Pump Resistor? Will the OE 12V supply line and relay handle the extra current draw?
I haven't studied the OEM fuel system yet so would love some feedback and opinions. Thx