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I revisited my fuel setup again for the 14th time since I bought the car. I removed the fuel pump housing only to find that the adhesive lined heat shrink (which was rated to be fuel resistant) on the wiring had swollen and come loose. This created a dangerous situation in the tank that I needed to reassess all together.
I decided to install a bulk head fitting and run the wires straight up through the fuel pump housing without splicing inside the tank and upgrade my fuel pump while I was at it.
The bulk head fitting is commonly used in double pumper setups and uses a rubber cylinder with two holes in it that compresses against the wires when you tighten the top cap. It has a jamming mechanism built in to prevent it from coming lose over time. It's an expensive piece of plastic but well worth the protection.
I switched from the walbro 450(F90000267) to a different model walbro 450(F90000274). The difference is that the F90000274 has a high pressure relief valve that opens later than the F90000267. This is only a concern if you are running more than base fuel pressure and high boost. I figured better safe than sorry so I have a minty, evo modified walbro 450 for sale cheap if anyone needs one. Just make sure to use high quality crimps. Solder and heat shrink at your own risk, but i'm over it.
going in
going out
I need to set my base fuel pressure next time the car is running, but here is a quick pump test. Please excuse the messy garage!
As some of you may know, my car has been suffering from a very disruptive lean issue at around 3k rpm that I have been trying to correct for some time now. It is proving difficult to tune out. Ask yourselves this, at what RPM is a 2.3 liter supposed to shine??
After a close analysis of the situation with letsgetthisdone and reading mrfreds review from years back, a potential solution has risen. I will be testing out the Radium Engineering fuel rail with the vacuum sensing version of their hydraulic pulse damper.
In short, it acts as a attenuator for pressure pulsations and harmonic resonance caused by the fuel pump and large injectors to get rid of mysterious lean spots in fuel delivery. It's also supposed to quite down the cabin noise from the fuel rail (if any). It compensates for changes in fuel pressure using a vacuum referenced, spring loaded diaphragm so that the injectors never see a drop in fuel pressure.
The Radium Engineering rail has a larger bore size than my AMS fuel rail. Hopefully this helps to aid the situation. The left side port that goes to the FPR uses a 3/8 NPT fitting. The middle port and right port use a -8 ORB (O-Ring Boss) fitting.
I'm impressed with the quality of this thing and the way it looks in general. Let's just hope that it works as well as it looks.
With the progress you said Aaron has made vs the previous tuner in getting that lean spot worked out, I'm fairly confident that this will at least help enough that the lean spot can be tuned around more easily.
With the progress you said Aaron has made vs the previous tuner in getting that lean spot worked out, I'm fairly confident that this will at least help enough that the lean spot can be tuned around more easily.
Exactly! It should help with fueling consistency everywhere, which was a big problem for my car. I noticed that some cars even come with an oem FPD. I'm not sure why the evo didn't.
The lean issue is gone, gone to hell where it belongs !
The HPD smoothed out my fueling at all RPM's. My AFR's are much more consistent now and I can't feel any more shuttering, bogging, or sudden drops in power. This was a very abstract and difficult issue to identify so hopefully more people will find this solution so that it will become more well known. Who knew fluid harmonics could cause such an impact even under 43.5 psi of base fuel pressure. You'd think that fuel is being forced into every crevice of the fuel rail at all times right? Wrong. The pulses in between can change that horribly and they must be dampened.
Cleaning and prep
Installed
All what's left to do now is continue to tune. Need to do Tires and brakes in the near future...
I take it you went through the same frustrating experience? Looks awesome man. I just wish I knew about this before I let my engine eat the problem during break in and all the driving i've already done. Who knows how much damage i've caused
I take it you went through the same frustrating experience? Looks awesome man. I just wish I knew about this before I let me engine eat the problem during break in and all the driving i've already done. Who knows how much damage i've caused
-pal215
I haven't used it yet, so it was an impulse buy for me. Aaron shouldbe seeing my car in the next couple weeks, I'm almost done.
Just when you thought you were done !
There is always something to do, I hate it sometimes but, we are car guys, we deal with it and keep it pushin 100
Just when you thought you were done !
There is always something to do, I hate it sometimes but, we are car guys, we deal with it and keep it pushin 100
Originally Posted by Sharkbite2000
She's gong along way.
Absolutely guys, if it's not one thing it's another. I know that many people will take on a build like this and when things start to get frustrating, expensive, or hopeless they will give up on it and sell the whole thing. The thing is, I already know how extraordinary the evo is when it is actually working properly. I'm addicted to that and I want that back. I will stop at nothing until I get there because I actually had that for 5 years until I blew the oem IX motor .
Back then, it was incredible. I would jump on the road with a stock block, stock cams, stock turbo, MAF tuned, E85 evo 9, still destroy nearly everything in site, drive to Vegas from San Diego and back, do the same thing again, and no harm was done. Not a even a quart of oil burned.
The car is far from perfect, but I've come too far to turn back now.
!
