Stock fuel pump with Stage 3 fueling?

[audiwop]

I've searched and I am having a hard time finding out whether or not you can run the stock fuel pump with the VAST stage 3 feuling kit. I know its better to upgrade, but I'm short on money right now after purchasing the kit.

[Das General]

You can get away with it.

[blrx7r1]

I am. But I was running a little lean at 23-24psi. So I just increased primary fuel with Lemmi and its working great.

[nizmosx]

i may have a brand new wahlbro for sale. got to run some logs first to make sure my stock pump is sufficient. so far it seems perfect.

[audiwop]

Ok cool, I was worried I had to drop more money into this thing again.

[Das General]

you can get a walbro for $100 and takes about 15 minutes to install. might as well do it, just to be on the safe side....especially if you are gonna run their larger injectors and a fair amount of boost.

[audiwop]

you can get a walbro for $100 and takes about 15 minutes to install. might as well do it, just to be on the safe side....especially if you are gonna run their larger injectors and a fair amount of boost.

thanks deb, would I need a retune after the install, or does the regular ots kit adapt?

[Das General]

retune after a fuel pump? nope you will be fine. but you have the added safety of being able to run serious boost without having lean conditions due to a poor flowing pump

[amd is the best]

Not saying that these guys don't know what they are talking about, because I ran stock fuel pump on my APR kit for a month or two before replacing it with an 044 without an issue. But, to be on the safe side I would contact VAST directly. They are very helpful guys and will without a doubt know the 100% correct answer to your question.

Nick

[The_Jerbel]

I can tell you the answer to the question. You will be fine with a stock pump, but you should run and monitor a WB AFR gauge. Be prepared for the possibility of having to add fuel via lemmi if you are running a little lean up top. The pump doesn't always just die suddenly, but gets weaker and weaker over time. If you want, I can get you the VAST high flow walbro unit to be on the safe side. That's what I did when I put the VAST stage 3 kit in my car.

[Das General]

by the way... I run 60# and a walbro 255. Just throwing that out there..I also run a very aggressive setup.

[audiwop]

I can tell you the answer to the question. You will be fine with a stock pump, but you should run and monitor a WB AFR gauge. Be prepared for the possibility of having to add fuel via lemmi if you are running a little lean up top. The pump doesn't always just die suddenly, but gets weaker and weaker over time. If you want, I can get you the VAST high flow walbro unit to be on the safe side. That's what I did when I put the VAST stage 3 kit in my car.

I was thinking about calling VAST and getting it from them, but with money being a little tight right now I have to wait a few weeks. My problem is I'm kind of an idiot when it comes to tuning and stuff. Even if I had lemmi I would have know way of knowing how to do anything with it. With my luck, I'll do something wrong and blow up my motor or something. Let me know how much I can pick up a fuel pump from you for, if its not to bad maybe I can get it sooner than I think. And Deb, thanks for all the advice as well. I'm not running the 60lbs, but the 42lbs injectors. So i'm assuming that should be a little easier on the stock pump for the time being.

[The_Jerbel]

PM sent.

[updaboost]

I thought stock pump holds up fine...

[Das General]

It will do just fine with your average OTS stage 3 kit.

But a lot of guys that run HB setups tend to run a higher flower FP due to their setup.

[The_Jerbel]

^^This is true. Also, the larger injectors of the stage 3 setup will cause extra strain on the stock pump. It will work fine, but will be quite stressed out, and may die sooner than it would have with stock injectors. It's kind of like running stock injectors on stage 3- It can be done, but you are stressing the injectors to the max of their potential.

[The_Jerbel]

PS. When replacing the fuel pump (or if you choose to go stock) make sure you replace the fuel filter at the same time to minimize the strain placed on the pump.

[nizmosx]

Not saying that these guys don't know what they are talking about, because I ran stock fuel pump on my APR kit for a month or two before replacing it with an 044 without an issue. But, to be on the safe side I would contact VAST directly. They are very helpful guys and will without a doubt know the 100% correct answer to your question.

Nick

my car and plenty of other fast stage 3 cars are doing just fine with the stock fuel pump. i have been logging and testing for the past 3 months now and have decided to keep the stock one in over the wahlbro.

[ThirdStrike]

my car and plenty of other fast stage 3 cars are doing just fine with the stock fuel pump. i have been logging and testing for the past 3 months now and have decided to keep the stock one in over the wahlbro.

thats all good but what do you do about a failing intank stock pump? you lean out thats what you do....
get the inline 255lph wahlbro and call it a day. constant pressure at all times ftw

[The_Jerbel]

The stocker might do just fine. But it's definitely not designed for the higher output of stage 3, so who's to say how long it'll last at the higher flow rate? The VAST pump is a safer bet.

[Devious27t]

thats all good but what do you do about a failing intank stock pump? you lean out thats what you do....
get the inline 255lph wahlbro and call it a day. constant pressure at all times ftw

do you have any data to back up that it is fuel pump that is starved and not the fuel filter starving it? I have a very strong stage 3 car running a stock fuel pump without a hint of an issue.

I should note that if I were to upgrade, the 044 would be my only consideration.

[ThirdStrike]

do you have any data to back up that it is fuel pump that is starved and not the fuel filter starving it? I have a very strong stage 3 car running a stock fuel pump without a hint of an issue.

I should note that if I were to upgrade, the 044 would be my only consideration.

i didnt say a stock pump would be an issue. a stock s4 pump provides enough pressure for stage 3.
i said a FAILING stock pump would be an issue. why would someone pay anymore than the 150 it costs for a inline when an inline will keep you safe.
its your choice $425 for a drop in 034 or $150 for an inline which combined with your stock will flow almost the same pressure. /done

[Das General]

the only qualms I have with my Walbro is the fact that is fucking loud. Sitting at a stop light all I hear is exhaust and my FP

[updaboost]

044? Who makes it? how much? There are guys putting down 450whp on stock fuel pumps..

[Das General]

Bosch makes the 044. ASP sells them.

[volks88]

my stock pump went out 4000 miles after my stg3. it just quit. went to the store, came out and it was dead. luckily my buddy owns a vw/audi performance shop and had a pump. changed it in the parking lot

[nizmosx]

yes, and i have also had a walbro fail on me. putting the stock pump in saved me. I know plenty of people who have gone through 1-4 walbro's in a years span. i can tell you im on my second one, and i dont want to bother putting it back in. as dvs said if im not running the stock pump which is perfectly fine, i will only put in an o44 unit. but i dont want to drop the coin on it as there is no point since my factory fuel pump has been proven to give me a perfect amount of fuel pressure. i will have brand new logs this weekend.

[goohead]

I have a inline walboro for sale for 105 shipped. Its a. Genuine pump bought straight from the walboro factory in CT, not a copy like the people saying they gone through 1-4 in a year. That's just stupid

[The_Jerbel]

yes, and i have also had a walbro fail on me. putting the stock pump in saved me. I know plenty of people who have gone through 1-4 walbro's in a years span. i can tell you im on my second one, and i dont want to bother putting it back in. as dvs said if im not running the stock pump which is perfectly fine, i will only put in an o44 unit. but i dont want to drop the coin on it as there is no point since my factory fuel pump has been proven to give me a perfect amount of fuel pressure. i will have brand new logs this weekend.

This has been discussed many times before. The walbro pump is a good unit. When there are as many pumps in use as there are, you have to expect to hear about a few failures from time to time. It's the same thing with cars. You expect to see a lot more A4's broken down than S4's simply because there are so many A4's on the road relatively speaking. I have a walbro in my car and is has been running strong on stage 3 for nearly 8k miles. Not a hiccup.