What fuel pump is everyone running? I'm looking at either the Deatschworks or AEM but I don't see a direct replacement option for the AEM.

 

Just picked up a walbro 255 today off amazon for 100$, 2 day shipping and all my fueling is settled, i just did a dive on this and youll get lots of opinions, and “data” on things dying prematurely, overpowering stock regulators. Everything usually has to be taken with a grain of salt. Will let you know how the 255 holds up.

 

I ran a 255 in my 87 and 89 Supras with no issue. That was the one to buy back in the day, it's good to see they're still holding up.

 

It's still the one I like to run. And it's true, you'll see ~35psi at idle with a stock pump, and the 255 will be ~45 until you put some load on it, but I've found it easy enough to tune out. Idle just needs less VE. I'm reading about a lot of people having starvation issues with DW pumps and low fuel levels, dunno if that's your plan.

 

I installed a DW100 when I replaced my roof, because I was there. There's no way it'll support my planned engine (6d block/4w head with a t3 and ID1050s) so I'm looking for more flow. I'll be running a Haltech so tuning won't be an issue

 

I’ve been running a Walbro 255 for a few years with nigh 300whp on the K24, surely different needs than a turbo BP, but it’s been very dependable and essentially invisible, as a fuel pump should be. It is noticeably louder than a stock pump. I preemptively upgrade the wiring during the K swap (both in-tank and wiring to the bulkhead connector) and set up a new fuel pump relay near the battery. The pump wiring in most old Japanese cars is marginal for anything beyond a stock pump.

Also yes, the DW and other turbine style pumps seem to have issues with fuel starve at lower fuel levels, while the Walbro is a positive displacement pump like the stock unit. haven’t heard of anyone having starvation issues with a PD pump and correct fuel hanger/sock setup.

 

Been running a Walbro 255 in my 1.6 L Miata engined turbo Ford Ice Racer for 15 or 20 years now, and another in my 1.8 L turbo Miata;both race cars. One failed when I ran the tank dry. But, otherwise they work great and keep up with any demand under 250 hp for sure.

 

I'm aiming for 300whp with (hopefully) 400 on a scramble boost function

 

Using a few of the flow/horsepower calculators on the innernets, you'll need between 200 and 225 liters per hour on e85 for 400hp (one calculator said 195, one said 222, so I rounded) and the "255" in Walrbro255 is the liters per hour rating, so you should be fine volume wise on the Walbro.

 

Mint. Thank you for the input. What can't this pump do?