https://www.evolutionm.net/forums/sh...threadid=56048

I've made mention in several posts to this fact... more and more private persons and tuners are finding the same result. David, why won't Works add a $100 Walbro fuel pump to the ECU mapping of Works upgrades to protect OUR cars? Is it that there is not enough profit margin in the product? Or worse, just because no one at Works has seen this as an issue and therefore doesn't want to spend the time and money to investigate farther?

 

Is this anything like the allegation that the Techtom reflashing equipment was defective and all Evos with reflashed ECUs were in grave danger of blowing up?

Thanks for bringing this to my attention. I'll certainly check with our engineers after the break, but it strikes me as unusual for an Evo's stock fuel requirements to over tax the factory fuel pump. I can't speak to the maps offered by other tuners (maybe they are dumping enough fuel to overtax the factory pump in an attempt to ward off detonation?), but I'm curious as to why a factory fuel pump would need to be replaced with fuel delivery requirements that are within factory specs.

-- DavidV

 

...Shiv is not the people you should be concentrating on... it was but another example... disregarding this issue based on your personal issues with a "tuner" makes you/Works look real bad... more people than not are finding this to be true on their own now. It's not a matter of if it is happening, but how it is happening. It's going to be one of those "I told you so" type things I guess...

 

Works is so far behind in the game, I think there "Engineers" Are crack heads. I would trust people that are out there doing this day in and day out, not doing a damn intake then water injection. What the hell? lol nice upgrade path. Anyways I have seen Shiv, David, and Big Al ALL say it needs to be done. Forget works and install the pump if you are going to be doing big power I know I am for $100 you can't go wrong.

 

I believe the WORKS car has the Walbro pump installed.

 

This is odd. If stock fuel pump is not good enough, why don't Shiv, David, and Al make it a requirement to upgrade the fuel pump at the time of reflash. I can't even find the fuel pump on Shiv's or David's website nor does Al sell a fuel pump.
I don't know but Evo seem to run rich. I got lots of black powder on my muffler and rear bumper. I think unless you add over 100whp, you don't need to upgrade the fuel pump. Then again, anyone adding 100whp should have already upgraded the fuel pump and the injectors as well as other parts.
And why Walbro and not some other fuel pumps? I do agree $100 is pretty good investment but that sounds too cheap unless the product is not good which then would be a bad investment. I would rather pay more and know I'm buying quality when it comes to engine safety.

It just sounds like bunch of BS unless someone who has real knowledge explain it better.

 

Incorrect. We continue to use the stock pump.

-- DavidV

 

There are a lot of parts that we could sell our customers that they don't need -- but that's just not the WORKS way. If that makes the WORKS Engineers, as well as the Engineers who designed the Evo that you are driving, "crackheads" for beleiving the stock pump to be sufficient, then so be it.

-- DavidV

 

I love how people can't get their point across with out being ignorant and insulting. If you have a problem with the way some one does business don't do business with them. Don't call people names, it just shows your ignorance.

 

You need to look again... two out of three do recommend the pump and the third (who I HIGHLY respect) spends more time at the strip than the track. If you reread everything, or better yet test it on your own... you'll find the issue to be intermittent under long, extended duration’s of load, best manifested by increased knock count under these conditions. Some theorize that the issue can be somewhat tuned around by dumping more fuel to combat the light detonation (as the average tuner would)... there by temporarily masking the problem.

As for the Walbro being too cheap... that is laughable to say the least. The Evo is a cheap hot rodded econobox... The cars are not even as "expensive" as "faster" American cars, much less higher end Euro/Japanese cars. So why people think we need everything for the Evo to be $500 plus in order to be "good" is beyond me. Walbro has been the number one selling fuel pump upgrade since as long as I can remember... I've got kids almost as old as some here, so that has been a while. Now it would be ridiculous to say there are not better out there, because there are... but for our little cars, they are ideal in cost and reliability.

 

Last time I talked with someone on the phone at WORKS (not David) I mentioned that I was going to install the Walbro and they mentioned that the WORKS car had one installed. I guess they made a mistake or I misunderstood.

 

Zeus,

On the one hand, I agree with you that a Walboro pump is cheap insurance if indeed there is an issue to be addressed. On the other hand, I first need to be convinced by compelling evidence that there is an issue in the first place.

Here is one way to go about ascertaining whether there is indeed an issue that needs to be addressed.

How many Evos exhibited signs of a fuel pump running at or beyond capacity?

If the answer is a that a handful of cars had this happen, the next question that needs to be asked is whether this is statistically significant among the thousands of Evos sold in North America.

Next, I would want to know whether these cars had anything in common or whether the sample was truly random. Were they all from the same geographic region (maybe all buying gas at the same station)? Were they all tuned by the same tuner? Was the person who diagnosed the issue in the business of selling the "cure" or an otherwise accurate source of info?

If, to my satisfaction, I could determine that a large enough number of Evos were experiencing signs of pump fatigue/failure to be statistically significant, that these Evos were spread out all over the country so as to be geographically diverse, and most if not all of them were stock Evos and not otherwise the subject of a poor tune, then I would have to agree with you that there is an issue. At that point, Mitsubishi of North America would need to get involved in order to issue a service bulletin or provide warranty replacement of the batch of pumps that were among those likely to fail.

But let's look at the facts. These are not stock Evos that are experiencing problems. These are also not WORKS tuned Evos. These are Evos tuned by other tuners. These tuners are now advocates of replacing the factory fuel pump. Why? Because otherwise the factory pump would b overtaxed with the tune that they are offering.

What lesson is there for WORKS to be learned from this? The lesson, I suppose, is and has always been not to follow the crowd and try tune to tune a car like the other guys.

The only time you should ever need to replace a factory fuel pump on a car with a safe, healthy tune is (1) if you have upgraded to larger injectors or (2) you have a car with well over 150,000 miles on it and the old pump is beginning to show signs of fatigue.

Since our customers have a safe, healthy tune designed for factory fuel injectors and all of our customers’ cars are no older than 2003 models, there is no reason to upgrade the pump.

-- DavidV

 

We have a customer who is running a Walboro pump in his Evo (he decided to buy one on his own although I personally advised him that it was not needed at this time with is current level of modifications) but the WORKS Evo does indeed run the stock pump and is making in the ballpark of 300 whp.

-- DavidV

 

I think stock fuel pump is fine for most Evo owners unless you are going for huge power gains.
But if Shiv and David start offering these pumps for $100, I don't mind getting one in the future just in case I decide to add bunch of mods.
Also, why don't anyone offer better ignition box and coil. Is the stock one just that good.

 

Ah, much better response than just jokes... I knew it was hiding in there somewhere...

To my discredit, I mis-spoke or failed to mention that this seems to be an issue on cars with a few more mods...

So are you saying that both the P1 (which I run) and the sustained boost P2 have absolutely no need for an upgraded pump when running 3" exhausts and other basic bolt on's?