Can a Walboro 340 handle 60lb injectors?

[BuickMike]

..or do I need to look into a Supra pump?

 

[BIGPSI]

been plenty of guys go real fast on only one 340. i would say yes

 

[Boost231]

340 is more then enough for 60's

 

[Razor]

Melissa'a GN ran 9.9 at 138con that setup

 

[BuickMike]

Thanks guys. I am restoring the car and was about to put the tank in and thought that now would be the time to change the pump if need be. I'm running alky too, so that should help.

Julio, I'm the guy who called asking about your controller. I'll be calling you back to get one in about 4-5months. Just getting budgetary #'s.

 

[Darkcyde]

Melissa'a GN ran 9.9 at 138con that setup

DAM! Hey razor I'm coming for christmas this year; and I know early this time. I'll be in touch

 

[TTipe]

340 M & 60's

These prior comments are dependnt on how much boost pressure and what voltage you have in the tank.There are also frictional losses incured with the fuel filter and fuel line.The discussion is really a fuel system with a 340M in it.For example the single "xp" volume ,pressure (x) trend on "gnttype.org" shows at 15 volts & 70 psi the output is slightly over 55 gal/hr.I'm not certain that volume was measured thru a representative fuel system either.Regardless based on the numbers (and experience) you won't be able to fuel 60's to static open.You must have alky & voltage.The denso 280 will fuel 60's to static open at 13.5 volts.

 

[BIGPSI]

i thought the 340 meant 340 gph and at 70 psi. i know when i had a pinched return line my pressure hit like 120.

 

[BuickMike]

I will be running alky and only pushing the car to mid 11's. Looks like the 340 will be fine until I get a bigger turbo and push for 10's.

 

[bison]

You will never be able to maximize a set of those injectors which reportedly flow a lot more than 60 lb/hr with a single 340 by itself if you plan on turning the boost up. Even with the voltage cranked up its a no go. Alky changes how far you can take them but you will find out where it ****s the bed if you arent supplying additional fuel from another source trying to get a number out of those injectors with one 340 pump.

 

[BuickMike]

Alright, i did my own math since I got conflicting answers.

A set of 6 60lb injectors running at 70psi fuel pressure at 100% duty cycle will flow 288 lph. That's more than what a Denso (270 lph) can pump out.

That being said, I will come nowhere close to maxing these things out with my setup. In fact, I've seen people running 42.5's just fine in the mid 11's.

Let's assume that I'm going to get to 80% duty cycle. I will see 230 lph. My 255 lph Walboro should be able to handle that. I will actually be around 75% at 67psi given what I will be doing.

Sure, I will need to step up if I go to a bigger turbo, but for now my $220 can go somewhere else to get my car back together and on the road.

 

[TurboTnZ06]

I went 125+ mph plenty of times in th 1/4 mile (enough for 10's) with a single 340 and 48# injectors on race gas 116 I couldn't go any faster with the 60's. Running 80's now though and planning on a big Weldon pump and big fuel lines to feed it.

 

[87GN_70GS]

These prior comments are dependnt on how much boost pressure and what voltage you have in the tank.There are also frictional losses incured with the fuel filter and fuel line.The discussion is really a fuel system with a 340M in it.For example the single "xp" volume ,pressure (x) trend on "gnttype.org" shows at 15 volts & 70 psi the output is slightly over 55 gal/hr.I'm not certain that volume was measured thru a representative fuel system either.Regardless based on the numbers (and experience) you won't be able to fuel 60's to static open.You must have alky & voltage.The denso 280 will fuel 60's to static open at 13.5 volts.

As stated, a single W340/0169 will supply about 55 gph at 70 psi (measured on a test bench). That represents 45 base psi plus 25 psi boost. 6 of 55# injectors demand 55 gph at 70 psi (and 25 psi boost) and 100% duty cycle. In this case, supply just equals demand, under ideal conditions.

So the best you will be able to run 60#'s is gonna be about 92% dc (=55/60).

Fuel pressure will drop above that dc number but it's not all that bad since fuel delivery will still increase slightly.

 

[87GN_70GS]

A set of 6 60lb injectors running at 70psi fuel pressure at 100% duty cycle will flow 288 lph

You forgot to subtract off boost psi. Remember the pump (rail) is pushing against boost pressure. Using 25 psi as a boost number, you should end up with 232 lph.

 

[87GN_70GS]

..or do I need to look into a Supra pump?

6 of 60#'s injectors demand about 60 gph at 70 psi (at 100% dc, and 25 psi boost).

A single hotwired denso -1020 will supply about 60 gph at 70 psi (tested on a test bench).

So, supply just equals demand (under ideal conditions).

At 100% dc you will have no safety margin.

60 gph of gas equals about 675 hp worth of fuel.

 

[GN87Mike]

340M & 60's

I used to run this combo. The best I could do was 10.60. I was adding fuel and nothing was changing. I watched the fuel pressure gage and noticed it was dropping slightly at the top of 3rd gear but would jump back up when the converter locked at 112 mph. I knew then it was maxed out. I switched to a dual pump and later added Razors kit.

Mike

 

[BuickMike]

Cool. Sounds like we're all at a consensus that if you answer my original question then I will need a double pumper to max out these injectors. However, I will be fine with my current combo. If I ditch the TE-44 for something else I will need to swap fuel pumps. That will probably be a long time considering money for this project is short and I'm trying to build it as more of a road car with great throttle response. Not to mention everything else in my build will only comfortably support a hair over 600 crank HP, so 11.0's or maybe 10.9's is the fastest I will ever push my car.