URD 255 Walbro Fuel pump

[CASTRO]

Allrighty, I want short and direct answers about this. I know that everyone gets the 190 kit and we all know from JoeB that no matter how much hp/boost we run, theres no way we'll need more than 190. I was looking on the site and found that they've got a 255 drop in replacement and would like to know if its a typo. If not, I'll be ordering this right after the O2 simulator comes in. Yes, I know I dont need more than 190, but gut feeling is telling me to be a bada$$ and get the 255 to be different. reply away!

btw, I allready sent them an email asking if it was a direct replacement like the 190, so really, I just wanted to see what people thought about it or if they had any info.

[Fletch]

255 lph fuel pump is a common upgrade for factory turbo cars and many other platforms. Can't speak about any difference in install than the 190 on the Camry/Solara.

[CASTRO]

Hmmm just got a reply from URD saying that it is indeed a drop in replacement. Looks like Im finally ready to upgrade the fuel pump to a 255 and skip over the 190

[Akfahad]

CASTRO...there was a thread about this pump a while back. It was discussed that the 190 couldn't provide sufficient fuel at WOT or something like that. One of the members supplied a graph which shows the fuel flow at WOT for both the 190 and 255 pumps. Just wanted to put it out there for ya.

[CASTRO]

hmmm, I believe I remember being in that conversation. I just wanted to know if anyone has this on their car and if it will cause me any problems such as a CEL or possibly a fuel regulator failure, or maybe blow up. Im heading out to the track in less than a month and dont wanna chance a new mod while im out there.

Akfahad, thanks for the reminder of that thread.

Anyone else have comments or things to add?

[Eye8Pussies]

nothing to add- but a quick question though


since the gen4s are a returnless fuel system, with the highflowpump, do you keep the stock fpr on the pump when you upgrade?

[CASTRO]

yup, that was one of the things I was worried about. JoeB once modified the stock fuel pressure regulator for more flow, but 3-4months down the line, it failed. Just upgrading to the 190, people seem to have no problems, but the 255 might be a bit much for the fpr? I'd really wanna convert to a return style, but too much work, money and downtime on the car that I can't afford.

[DaveMush]

http://shopping.lightningmotorsports.co ... /d_885.gif

thats the graph...

http://www.solaraguy.org/viewtopic.php? ... 5&start=15

That's the previous thread...

Me

Thats the member who posted the graph of the flow differences...

[CASTRO]

i know that t flows more and its better than the 190, but will it mess with anything else since its so strong?

[DaveMush]

if you use it, and you dont need all that it can put out.... You will need a couple things.

1. an adjustable FPR which will probobly require a return line to be plumbed into your fuel system/tank

2. a fuel cooler of some kind... you will probobly be bringing the fuel into the engine bay to the adjustable FPR, then plumbing it back to the tank... thus heating it up.

[Eye8Pussies]

^ if you make a return system, you won't need a fuel cooler since all the warmed up fuel that isn't used will just return to the fuel tank and the rest of your fuel will cool it down.

but it's when you don't return the fuel and you pump in more than you need that some of hte fuel will stay in the rails and heat up

[DaveMush]

untill your fuel tank gets heat soaked.....

the other things that cooler fuel does for you:
-lowers emissions
-reduces combustion chamer temperatures
-due to cooler cylinder temps, allows for more timing advance (lower temps means reduced detonations means more room for pushing the limits means more advance angle)

Why do you think that almost all new Toyota vehicles use a returnless system? to reduce the amount of heat that the fuel takes on, and to help reduce the ever tightening emissions output from their cars/product line.

I cant really think of all the benefits at the moment, but it helps keep your fuel pump cooler as well, giving it a bit more life.

[CASTRO]

Sweet, I just got word back from URD that it is indeed a new drop in setup thats the same as the 190 Walbro and there should be no issues to worry about. I understand that a return style + fuel cooler is the best way to go especially with a higher flowing fuel pump, but converting to a return style is one thing that I want to avoid for simplicity's sake. Looks like when I get the funds, I'll be putting an order for the 255 Walbro fuel pump as it is only 7-8 more dolallars more than the 190. Thanks for all the input guys.

[Eye8Pussies]

untill your fuel tank gets heat soaked.....

the other things that cooler fuel does for you:
-lowers emissions
-reduces combustion chamer temperatures
-due to cooler cylinder temps, allows for more timing advance (lower temps means reduced detonations means more room for pushing the limits means more advance angle)

Why do you think that almost all new Toyota vehicles use a returnless system? to reduce the amount of heat that the fuel takes on, and to help reduce the ever tightening emissions output from their cars/product line.

I cant really think of all the benefits at the moment, but it helps keep your fuel pump cooler as well, giving it a bit more life.

hmmmm.....true enough......I think I may introduce a fuel cooler as well then....though up here in TO it's usually pretty cool

[ProRally Codriver]

untill your fuel tank gets heat soaked......

I put ice in my gas tank to keep it cool.

Really though, if cool gas was so important, you'd see cars come from factory with a fuel cooler and if it gave increased performance, you'd see more race cars with liquid CO2 setups. Do get better gas milage in the winter? No.

Just plumb your return line away from the hotter engine components and you'll be fine. Avoid the El Cheapo fuel pressure regulators and include an inline fuel pressure gauge.