ElswickB22

Hey guys wanted to hear some opinions on my question. I believe my fuel pump is giving out on my civic. Its a mini-me swap, with a short ram intake. Nothing else. I am in the beginning process of planning out a turbo build for the car and was wondering, should I replace the fuel pump with a stock one?, or go ahead and get what I was planning on putting in the car? (a Walbro 255)

I have read different things about running a 255 on a stock fuel system with no avail on a true answer.

Thanks!

wantboost

iTrader: (2)

the stock pump will not support elevated power levels. put the walbro in and hard wire it

a walbro will support any power level that can be made on pump gas, the limiting factors will be injector size and fuel choice

read the fuel pump thread NotARasict posted, that's all you need to know

Turbo-LS

iTrader: (4)

You can even install a walbro and keep stock wiring for up to 400whp range and not have any issues. but yeah stock pump will not go much above stock power. maybe 225hp but thats prob pushing it. some like to push the envelope but for 89 bucks why bother.

TravisBiggie

I'm shooting for 500whp shortly, I have a walbro on stock wiring, should I be rewiring it? Got any info on doing this, looking around now, no luck yet.

ElswickB22

Ok, but just to clarify I would be running stock wiring, injectors, and fuel rail/reg for a prolonged time, I just wanted to make sure I wouldn't overkill the system installing the 255.

I just don't want to buy a new stock one then buy the 255 in a few months once I crank up the power.

2kdrift

You can run a walbro 255 with everything else stock, all motor. it might bump your fuel pressure about 10 psi ad idle, thus running a bit rich at idle but its not a big issue at all. I have been running it this way for over a year

NotARaCist

iTrader: (1)

here's a link for you, so you don't have to go hunting for the thread.

The stock pump can theoretically flow to support 400 horsepower, but I sure as **** wouldn't trust it past 250. The Walbro 255 would easily flow enough for you on an otherwise completely stock system. I'm building something with very similar power goals right now, and I'm seriously considering a CNT pump, as well. Higher flow, lower price, and I haven't found a bad thing about it yet. You might want to look into it.

With the right fuel pump, you can easily get to 500 on a stock FPR, rail, and lines. A Walbro 255 can flow for 700+ at stock PSI, and a CNT 300 can flow for 900+ at stock PSI. I would definitely replace your wires, if for nothing else than peace of mind. Honda uses cheap wires. Those wires are 10+ years old. A spool of good 8g wire is cheap insurance. There's no reason not to.

wantboost

iTrader: (2)

so you're going to be running stock injectors on a boosted motor.... let me know how that goes

m4xwellmurd3r

Lol id like to see that too.
Ok, so since were on the subject of fuel pumps, what would you run for an e85 compatible pump up to 400hp? I was thinking of an aem 320lph e85 pumps but saw walbro makes a 416lph e85 pump

Im sure the 416 is super overkill but overkill is better than starving

wantboost

iTrader: (2)

I do believe IT tested e85 pumps as well, I don't know if every pump manufacturer has flow charts on their site but I would always want more pump than I needed.

not only does it provide a large safety cushion as well as the possibility of more power but a pump that moves more fuel at lower pressures and lower amperage draw results in cooler fuel which means more power (read NotARacists fuel pump thread)

if fuel temperature is a concern they do make inline coolers that are basically finned extruded aluminum pieces that do a good job of lowering fuel temps. methanol injection also lowers fuel temps but it's after it has been injected.. fuel expands when hot, just like air, so less fuel is actually injected for a given pulsewidth.

cryo2 also makes a co2 fuel cooler that ive heard works well, although it is a lot of work to cool fuel lol. I've debated about running their full setup on my road course car to keep things cool on hot days/hard driving... not sure though

ElswickB22

Lol, I would only be running stock fuel system until I finish purchasing everything. Haven't started my build yet. Just need a new fuel pump cause the car is struggling. As of right now everything is stock.

m4xwellmurd3r

Speaking of those fuel line coolers, turns out some of the ac lines on my integra use those finned hard lines. Ill bet after a good cleaning those would make am excellent fuel line cooler. Thanks though, I think youre right, bigger is better. Im still looking up infor for that 416, but it seems to be the go to pump for e85 since its such a high output single pump.

Now to figure out how to make it work in a da integra

Edit
I take that back, the lines I mentioned are the power steering oil cooler lines. I still bet they would work as a fuel cooler

h22apwrd95

iTrader: (1)

I personally am running a DW301, and I love it. Stock wiring triggering the relay, 10AWG powering through the relay to the top of the hanger. Supported 500+ on E70 with no issues. Shoot, 4th gear saw upwards of 24lbs on the top end of the track, probably closer to 600, all with a 1:1 FPR.

Also, here is a great site for figuring out your fuel consumption and pump needs. http://webpages.charter.net/hybrdthr...mp_web_app.htm