Spei

Haven't others run the DW pumps for a while with no issues? I feel like there's more to it than just the pumps straight up sucking. I hope I made the right choice

SpartanSV

Coming up on 2 years and around 15k miles almost exclusively E85. No issues with my DW200. I put a DW300 in my f150 recently and it's been fine so far. Also E85.

​​​​​

Spei

What did you do for the wiring on the Dw200? I saw some vids and people did some wiring changes (splicing, depinning...) Or is it just plug and play? Some people run different relays too?

SpartanSV

IIRC it was plug and play for an NA. NB may not be but it'll include a pigtail so you can cut it and connect it to your factory wiring. On fuel pump wiring I like to use the heat shrink style butt connectors. Obviously don't try to shrink the tubing anywhere near the open fuel tank.

I carry a spare relay as I'm well aware of the potential failure with an aftermarket pump. A piece of wire for a jumper would get you home as well. I did have a wiring failure around a year ago but it was something that I don't believe the aftermarket rewire kits address. The terminal on the inside of the bulkhead connector failed. I cut off the plastic around the terminal and soldered straight to it.

Spei

I'll pray for it to be plug and play then hah. If I do have to cut and rewire stuff, is heat shrink stuff even safe in the tank? I feel like the fumes might eat away at the material and cause a short or something.

chicksdigmiatas

iTrader: (11)

I ran a Walbro 255 for years on my car which was pretty much exclusively E85 with DW1000s, no problems with the NA FPR mounted on a NB fuel rail. I will admit my idle was a touch shitty on gasoline. I wasn't sure if that was the injectors or FPR. Both of which are technically subpar, if I had to blame anything, it would probably have been the injectors. I was never impressed with them, but I got a steal on the price at the time. With that being said, I never had any problems on a 2871 churbo at 19 psi with ethanol. The 340 seems like overkill. I have also never bought into the "255 Walbro overpowers your FPR" crap. Which it doesn't. I had one on hand and ended up selling it because my idle was around 14:1 and doing just fine and it wasn't worth the time or effort to install a part I didn't need.

Spei

Good to know the FPR will probably be fine. Hope the DW200 choice will be too

andyfloyd

This, the walbro 255 works perfectly. I get a 14.7 idle on grams 750s on a stock nb1 fuel system. The walbro is louder than the dw200 because it's not a turbine style pump, but it's super reliable I've never had a Wally fail on me.

deezums

iTrader: (3)

I've been planning on grabbing a ford FPDM for a long time now, they take a low frequency input signal and multiply it to an inaudible PWM frequency, supposedly. Should plug right into MS3 and work with open loop fuel pressure tuning. Make any fuel pump work with any FPR, assuming you add a fuel pressure sensor to make sure you set duties just high enough.

https://www.msextra.com/forums/viewtopic.php?t=59992

Don't PWM your non-turbine pumps...

I have a DW300 on a turbosmart FPR800, return converted NB so I have a full 5/16 return line. Pretty sure my FPR lags behind manifold pressure ever so slightly, makes throttle lift pretty rich. Still need a more accurate fuel pressure sensor, too.

SpartanSV

Can you elaborate? I'm currently using PWM on a gear pump and wondering if you know something I don't.

MetalMuffins

iTrader: (1)

I've never heard of FPDM's before, but it seems like a great solution for stable fueling with the NB return less system. Definitely be interested to hear how you make out with it, I'll be doing some more reading.

chicksdigmiatas

iTrader: (11)

I agree, the thing is loud, but we are also driving convertibles with 3 inch exhausts and the fuel pump is a little over a couple feet from our head. Never really bothered me. I put some sound dynamat over everything there and it seemed to help. It is the only fuel pump I have ever ran. I can't comment on the alternatives. All I can do is share my experiences. So my opinion is subjective.

deezums

iTrader: (3)

https://vansairforce.com/community/s...=167848&page=3

Turbine pumps can slip, but gear pumps can't. So the pump rotates and starts to compress some fuel down the line till PWM cuts the signal. The turbine pump spins down nicely, the positive displacement pump is as the name implies and is driven backwards by the "compressed" medium. Or, cogging.

I'm sure it's a lot better if you are still using a FPR and using "open loop" pwm so you maintain a lot higher duty cycles, but if you search around you'll find plenty of examples of mustangs and their closed loop FPDM's and walbro pump incompatibility.