Evo X upgrades

[mlomker]

Originally Posted by Kracka

Wouldn't a 1/2 tank or more in the stock fuel tank be enough to solve all fuel starvation issues in a hard corner?

That's always the first thing that I suggest when someone posts about starvation issues on the national forums. At least half of them say that fuel level doesn't matter for their cars.

Here's one from yesterday.
http://www.evoxforums.com/forums/showthread.php?t=39452

I'm starting to wonder if some people that complain about 'ignition' issues on the X aren't actually having a fueling issue...they're just making an assumption based on other cars that they've owned.

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My current problem isn't fuel starvation, though. It simply isn't getting enough fuel to the motor to support higher power levels. I've thought about switching back to pump since it requires 30% less flow.

[Shane@DBPerformance]

Usually when you are road racing you try to keep the tank as full as possible anyways though.

[slowbubblecar]

What is your buddy Gates doing? Fuel cell?

[badinblack]

I would think if those lines don't fix your issue it would have to be one of the pumps. Good luck man.

[mlomker]

Originally Posted by slowbubblecar

What is your buddy Gates doing? Fuel cell?

1gal surge tank with dual 255's off of it. The pumps are closely attached to the tank by hard lines whereas my Bosch is perhaps 9" away by hose and two 90deg fittings.

Originally Posted by badinblack

I would think if those lines don't fix your issue it would have to be one of the pumps. Good luck man.

I'm planning to do a one-minute flow test on each of the pumps when I install the new setup.

If there is another chapter in this saga then it'll involve a new 044, probably one of those new Jays Racing knock-offs that flows a little more.

[mlomker]

The 2.5ltr surge tank arrived from Australia. Need to drop Shawn a line and see when I can swing by for the install.

[Murlo26]

May the force be with you on this endeavor, lol.

[TheBlizzard]

If this doesn't work call NASA and see what they use to launch shuttles into space.

[mlomker]

Who needs hp when you have a solid rocket booster??

Sounds like I'm putting this in on Friday night.

[mlomker]

Got `er done. Only took twice as long as I thought. Thanks Shawn!

[Murlo26]

Well, does it seem like this worked yet or do you not know yet?

[mlomker]

Originally Posted by Murlo26

Well, does it seem like this worked yet or do you not know yet?

I haven't tested it yet. I'm not in a hurry since I don't have the funds for a retune anyway. I need to sell some stuff.

[mlomker]

Went out to test the fuel system this afternoon.

[Speedfreak]

This fuel system journey is painful to watch. It could be one of the most expensive series of failures I've seen.

[mlomker]

Originally Posted by Speedfreak

This fuel system journey is painful to watch. It could be one of the most expensive series of failures I've seen.

The annoying thing is that I've had a lot of expert opinions along the way. I've kinda given up on them now. LJ gets a +1 for his surge tank probably not being the problem. It was a good idea to replace all those line with braided, E85-safe lines anyway. The new tank itself was 'only' another $200.

[Swifty1638]

oh god. wtf. I can officially sympathize with you, and the ongoing bullshit that is this hobby What are the new ideas on the drawing board?

[mlomker]

A few possibilities here:

1) My Bosch 044 is a lemon.
2) A Bosch 044 on its own can barely do 400whp @DB.

I'm a bit disinclined to waste another $200 on an 044 if it isn't adequate.

Anyone heard anything bad about Magnafuel pumps? The 4301 is obviously overkill but it's $15 more than the 4302 so I don't see a point in it.

http://www.summitracing.com/parts/MRF-MP-4301/

[Speedfreak]

The 044 is a tried and true pump. It supports an easy 600whp, and people have pushed 700+whp with a very efficient setup. I personally have supported 584whp on an nsx tuned by Shane(backed up in Chicago with 560whp on a stingy Mustang dyno in Chicago). If it's the pump, you have a lemon, otherwise it shouldn't be your issue.

Edit: I'd be willing to lend my brain to help you diagnose the issue if you want to stop by some time. I just can't watch this fuel system situation any longer.

[mlomker]

Originally Posted by Speedfreak

The 044 is a tried and true pump. It supports an easy 600whp, and people have pushed 700+whp with a very efficient setup.

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.

[311evo]

Originally Posted by Speedfreak

The 044 is a tried and true pump. It supports an easy 600whp, and people have pushed 700+whp with a very efficient setup. I personally have supported 584whp on an nsx tuned by Shane(backed up in Chicago with 560whp on a stingy Mustang dyno in Chicago). If it's the pump, you have a lemon, otherwise it shouldn't be your issue.

This.