Evo X upgrades - Page 76

**mlomker** · 10-10-2010

Quote:

Originally Posted by 311evo

This.

The symptoms are:
1) Run Bosch off of car's relay and it works fine up to current power level, car will hit 68psi as you'd expect with 25psi boost and 43 base.
2) Run pump off of car battery (using a relay) and it'll max at 55-60psi.
3) Run pump on BAP on the car or battery and it maxes in the low 50's psi.

The car's relay runs it at 9volts or so in low load situations so I'm guessing that the hotter the pump gets (from voltage) the worse that it works.

I've pondered it being a boost issue with the vacuum line to the fpr, but it works in the #1 configuration so that would seem to rule it out.

Swifty1638 · 10-10-2010

and the FPR isn't torn/bad?

**mlomker** · 10-10-2010

Quote:

Originally Posted by Swifty1638

and the FPR isn't torn/bad?

I hope not. I put in an Aeromotive unit a few months ago as a part of troubleshooting this.

FattyBoomBatty · 10-10-2010

Buy some dynamite.

**mlomker** · 10-10-2010

Quote:

Originally Posted by FattyBoomBatty

Buy some dynamite.

Note to self: more insurance coverage.

Swifty1638 · 10-10-2010

Well, I am saying, was it replaced while trying to fix other shit too? You might wanna swap it out, and see if that makes a difference. Sometimes, changing 6 things at once, then having an issue doesn't help, because you don't know the effect each of those 6 items had..I wasn't sure if the FPR was swapped out, while you swapped your injectors, or messed with the pump wiring, or something else..who knows.

turbotalon1g · 10-10-2010

This issue give me a headache, I'm sorry for you. But 044 is plenty of fuel for 400whp at DB, shit a single 255hp will do 400 on E85 I believe.

I can't imagine DB hasn't just said give us the car, give us sometime.

**mlomker** · 10-10-2010

Quote:

Originally Posted by Swifty1638

I wasn't sure if the FPR was swapped out

I've been testing things one at a time, which is why I've been working on this for like 5 months now. The stock fpr had the same symptoms. The big afpr does allow me to run the 044 at battery voltage at idle, which the stocker would not.

Quote:

Originally Posted by turbotalon1g

But 044 is plenty of fuel for 400whp at DB, shit a single 255hp will do 400 on E85 I believe.

The car is already 400 @DB. I want the rest that is in it. Maybe 450. Who knows.

Quote:

I can't imagine DB hasn't just said give us the car, give us sometime.

Shane burned a lot of time troubleshooting the Full Blown hanger problems that I had prior to Full Blown installing the first surge tank. I'm not going to ask for a ton more charity and I can't afford to pay for it right now.

I'll have to keep plugging away at it, methodically, doing things to the best of my knowledge and with what money I've got. There's nothing else I can do.

turbotalon1g · 10-10-2010

I'd like to help you if possible, let me know I'm usually around since I don't have a job.

I'd say shove a 255 or 044 inline.

**Kracka** · 10-10-2010

Obviously not related to your fuel issue, but put a zip-tie on your BOV. I've seen quite a few vacuum lines blow off the BOV recently for whatever reason.

C3L1CA · 10-10-2010

The 044 should be more than enough to get over 450 @ DB on corn unless the evo x fuel system is a lot crazier than a dsm. I know all sorts of DSM that max out a high pressure 255 pump @ 450awhp on DB's dyno. I've made 520 with more fuel left with just 255 and a bap.

It kind of sounds like a wiring problem to me. I wish you luck, you deserve a fuel system that works after spending on that money.

**mlomker** · 10-10-2010

Quote:

Originally Posted by Kracka

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.

Quote:

Originally Posted by C3L1CA

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.

**Kracka** · 10-10-2010

Quote:

Originally Posted by mlomker

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/sho...&postcount=260

**mlomker** · 10-10-2010

Quote:

Originally Posted by Kracka

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).

Quote:

Originally Posted by scheides

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.

**Murlo26** · 10-10-2010

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** · 10-10-2010

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.

Speedfreak · 10-10-2010

Quote:

Originally Posted by mlomker

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** · 10-12-2010

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 · 10-12-2010

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** · 10-12-2010

Quote:

Originally Posted by badinblack

(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.