Evo X upgrades

[mlomker]

I've seen quite a few vacuum lines blow off the BOV recently for whatever reason.

Every vacuum connection on the car is zip tied. I have an in-car fuel pressure gauge so that's an issue I'd notice right away. Without the fpr hose you'd be below 40psi at idle.

It kind of sounds like a wiring problem to me.

That's something that I've spent time on since it doesn't cost anything. I have both pumps running off of Bosch relays with power right from the battery. Since the X battery is in the trunk, we're talking a couple feet from the 044 right now.

[Murlo26]

Suck man...so basically the new tank and redoing the lines didn't do anything?

I think trying a new 044 is a good idea....something has to be a miss. You have replaced everything essentially.

[scheides]

Hey what if your feed line (or the return line for that matter) is kinked or clogged somewhere? I think you had mentioned this being a possibility a while ago, just re-bringing it up. Get the car up in the air and inspect those suckers.

[Kracka]

Every vacuum connection on the car is zip tied. I have an in-car fuel pressure gauge so that's an issue I'd notice right away. Without the fpr hose you'd be below 40psi at idle.
Like I said, obviously not related to your fuel issue, but in the picture you can very clearly see the BOV vacuum line is not secured on the nipple. I never said anything about your FPR.

*edit*
Also...http://www.mitsustyle.com/forums/showpost.php?p=361378&postcount=260

[Speedfreak]

On E85 or pump? When used inline with the in-tank pump or on its own, replacing the pump in the tank?

That's where things get tricky. Inline pumps flow more since they have fuel pushed to them rather than having to waste energy sucking it. E85 also needs 30%+ more fuel.

I've done a lot of Internet searching this last week and opinions vary a great deal. The most solid data I've seen is a guy that did 730whp on pump with a 044 that replaced his in-tank. That's comparable to what I'm doing (except my fuel tank is a small surge tank).

730 * .70 = 511.

Shane's dyno is about 12-13% lower than a typical Dynojet.

511 * .88 = 450.

That's still less than I'm getting by a meaningful margin. The problem is that I don't want to get stuck with TWO 044's that are worthless to me. I wonder if anyone has an 044 that they could lend me for a couple days.

This was on pump, and in the tank as a replacement.

[mlomker]

Like I said, obviously not related to your fuel issue, but in the picture you can very clearly see the BOV vacuum line is not secured on the nipple. I never said anything about your FPR.

I'll take another look the next time I'm down there. The nipple on that particular BOV is gigantic and it's tough to get the line on it (which also makes it unlikely to come off).

Hey what if your feed line (or the return line for that matter) is kinked or clogged somewhere?

I just replaced all of the lines on Friday when the surge tank was installed--nearly 35 feet of braided hose (cha-ching).

The only lines I had wondered about were the hard lines from the fuel tank area up to the engine bay. Obviously that's improbable but we did find a fair bit of that black goop on the injectors at one point.

[mlomker]

Just got back from a brainstorming session with speedfreak (Momin). It was fascinating and led down a path that I hadn't considered.

The X's battery is in the trunk. I figured, 'great', that means I can just hook my fuel pumps up to the battery and it's a nice short cable run. The flaw in that thinking is that when a car is running the power doesn't come from the battery -- it comes from the alternator in the engine bay. Doh!

My next step is going to be to wire my fuel pumps up car stereo-style. I'll run a 4ga from the engine bay to the trunk and use power and ground distribution blocks for the devices related to fuel pumps.

[badinblack]

humm. Not to rain on your parade but when the car is running you should have an even system voltage (about 14.7V) even to the batt. in the trunk, right?

[mlomker]

(about 14.7V) even to the batt. in the trunk, right?

I've owned quite a few cars over the years and they were all 13.8v when the alternator is working.

There are a lot of smart guys on Style and I don't know most of you. Momin ran a shop for a decade and was once Shane's employer so I think it's worth testing that theory. Worst that could happen is that I end up with some baller pump wiring.

[turbotalon1g]

I'm at 14.1 at idle