[radz28]

Thank You VERY much, as usual

[cjperformance]

Little more progress. I spent a lot of time playing with ideas for fuel routing. Hopefully this description saves a bit of time for others.

I got the fittings based on some examples of PD installs, but there were some challenges with the stock manifold, and I would probably have done a couple things differently if I'd known better.

Version 2.0 probably would have been a 45-ish degree hose end on the inboard passenger side at the tee instead of a straight hose end. To get the hose routed under the intake, the tee has to be canted with the straight hose end as I show in the image. With the straight hose end and the tee being level, it interfered with the wiring harness. Canting the tee jacks up the other side near the dipstick. It looks like hood clearance will be fine though.

With the stock intake, I think there is probably enough room to run the font fuel line over the top of the manifold, but ultimately I decided to go under as I wasn't confident it would look good. So that's an option too.

The other thing is the whole FF sensor contraption. I couldn't really make things happy with the FF sensor on the passenger side. All the rigid fittings it was taking to get it hooked up the same way radz28 and others have shown for a PD setup caused the FF to interfere with the stock manifold, the hard fuel line from the tank, and that hard evap line. With the DSX FF kit, there is also a limited amount of distance the FF sensor can be from an ignition coil as the FF taps into one of the coil connectors for power.

I've got the FF sensor and the tee on the driver side... this mostly works out, but I made the hose about 1/2" too long going from the pass pi plate to the FF sensor, so there's a little axial stress on the whole thing. Not much, but if I'd cut the hose a little shorter it'd have been just fine. There's lots of room on the driver side for the FF and tee.

Version 2.0 probably would be attempting to get the FF sensor downstream of where the tee is... so between the tee and the hpfp. I think there would be plenty of room there with the right fittings, then the FF sensor would read the combined stream, instead of just one leg.

I didn't make the last hose yet that goes from the tee to the HPFP... I think the way I have things now is "fine", but I was sick of hose making for today and wanted to just think on the last part for a bit longer before I committed to what I've already done.

I have to say, it's starting to look pretty bad-ass under the hood. I'm betting most folks not familiar with this kit are gonna think it's a nitrous kit.

[cjperformance]

I'll throw this in here too. Got some matching F14's in 18's for the front. I can't actually mount them on the car until I can move it. I think it'll look just right though!

[Joshinator99]

Coming along @CJ! Keep up the good work!

[laynlo15]

My FF sensor is just before it goes into the HPFP, can't tell if that's how yours is or not. You'll be ready to fire it up soon, do you already have the wiring into the ECU? Looks good and you have so much room to work around unlike the Pd setup where everything is really a tight fit.

[KingLT1]

[Evansa22]

So are you using the stock evap line as a secondary fuel line from the back? Just what it looks like to me, but the idea has been run by me from oilfieldtrash. Cool to see it works well if that's the case

[cjperformance]

Originally Posted by Evansa22

So are you using the stock evap line as a secondary fuel line from the back? Just what it looks like to me, but the idea has been run by me from oilfieldtrash. Cool to see it works well if that's the case

No, I wasn't planning on doing that. Here's a couple diagrams that might help explain.

V1 is what I am working towards now. It's based on what the PD folks were doing. The main thing I don't like is the FF only reads one leg of the big loop. The leg that is read is about the same length as the other (unread) leg, so in theory, the mix should be about the same in either leg when changing fuels.

V2 has not been tested, but I think if I were to do it again, I'd try that route. There's plenty of room under the stock manifold to route that pass rear under the manifold to the driver's front. There is likely enough room to put the FF after the PI fuel rails and before the HPFP. If you fill up with different fuel, you should be relatively safe once the FF sees the new E content as the PI fuel rails have been flushed with the new fuel mixture.

If that doesn't work for some reason, my alternate idea is to put the FF back right after the original hard supply line. You could calculate the fuel volume of all the PI rails and lines, and account for that volume in the ECU tune so it wouldn't adjust anything for E content until after the specified fuel volume has passed.

What I don't know is if the PI system also has the capability to delay changes until specified fuel volume has passed.

There's a couple other issues with changing E content that makes me think it's not a good idea to drastically change E content...

The large horizontal PI rails will flush when the E content changes because the fuel must pass through them prior to getting to the DI, but the small black adapter tubes right behind the PI injectors will contain a small volume of fuel that won't flush except under certain conditions like WOT and that's through the PI injector. So going from higher E content to lower E content is safe, but going the other way would not. The amount of fuel they contain is small, but for a brief moment you could have a situation where the ECU is using full E spark, but the PI system will spray lower E content under WOT for a split second.

In any case, I don't intend on making drastic changes from high E to low E, but something to think about.

[cjperformance]

Originally Posted by laynlo15

My FF sensor is just before it goes into the HPFP, can't tell if that's how yours is or not. You'll be ready to fire it up soon, do you already have the wiring into the ECU? Looks good and you have so much room to work around unlike the Pd setup where everything is really a tight fit.

Hopefully finishing up the fuel lines and installing the Reflex today.

[laynlo15]

Originally Posted by cjperformance

Hopefully finishing up the fuel lines and installing the Reflex today.

Sounds good, take your time and it will all work out.

[laynlo15]

Originally Posted by cjperformance

No, I wasn't planning on doing that. Here's a couple diagrams that might help explain.

V1 is what I am working towards now. It's based on what the PD folks were doing. The main thing I don't like is the FF only reads one leg of the big loop. The leg that is read is about the same length as the other (unread) leg, so in theory, the mix should be about the same in either leg when changing fuels.

V2 has not been tested, but I think if I were to do it again, I'd try that route. There's plenty of room under the stock manifold to route that pass rear under the manifold to the driver's front. There is likely enough room to put the FF after the PI fuel rails and before the HPFP. If you fill up with different fuel, you should be relatively safe once the FF sees the new E content as the PI fuel rails have been flushed with the new fuel mixture.

If that doesn't work for some reason, my alternate idea is to put the FF back right after the original hard supply line. You could calculate the fuel volume of all the PI rails and lines, and account for that volume in the ECU tune so it wouldn't adjust anything for E content until after the specified fuel volume has passed.

What I don't know is if the PI system also has the capability to delay changes until specified fuel volume has passed.

There's a couple other issues with changing E content that makes me think it's not a good idea to drastically change E content...

The large horizontal PI rails will flush when the E content changes because the fuel must pass through them prior to getting to the DI, but the small black adapter tubes right behind the PI injectors will contain a small volume of fuel that won't flush except under certain conditions like WOT and that's through the PI injector. So going from lower E content to higher E content is safe, but going the other way would not. The amount of fuel they contain is small, but for a brief moment you could have a situation where the ECU is using full E spark, but the PI system will spray lower E content under WOT for a split second.

In any case, I don't intend on making drastic changes from high E to low E, but something to think about.

Honestly E65 to E70 is plenty to make good power, I can only get those contents here in Mid Missouri so I'm making all I can for my fuel system until we do a twin in tank low side this spring sometime.

[cjperformance]

Fuel lines are done. I waffled around again for an hour trying to figure out the best routing using the parts I had. In the end I stuck with the original plan.

If I had a large selection of fittings on hand, I probably would have went with something closer to my version 2 drawing, maybe even flipping it around a bit so the line to the HPFP comes in from the front under the manifold. The 180 fitting was just awkward. Needs to be something slightly less than 180 degrees.

In any case, did the best I could using what I'd already ordered.

Manifold is on and torqued. Moved the DSX FF harness to the driver side from the passenger side. No huge issues.

Started connecting up the PI injector harness. A couple connections were REALLY tight, but fiddling around with the angles of the injectors I was able to get everything connected up.

I might reach out to THPSI and suggest they add a little more relief in certain spots to help with installing the square injector adapters. The square injector adapters couldn't be clicked into place with certain injector rotation angles because the connector would hit the edge of the plate. Really difficult to explain, but in the end, everything is connected up. It didn't stop progress, but it would have been a little easier if there was more freedom of movement there.

It's all looking really nice now! That's probably all I'm going to have time for until next weekend! Next weekend will be finalizing the routing of the wiring, installing the Reflex, checking for fuel leaks, etc... and if the weather cooperates, maybe a tune and test drive!

[laynlo15]

Where did you decide to mount the Reflex box. I mounted it under that brace but just don't know if I like it there. Just hard to place with all the wiring that's attached.

[cjperformance]

Originally Posted by laynlo15

Where did you decide to mount the Reflex box. I mounted it under that brace but just don't know if I like it there. Just hard to place with all the wiring that's attached.

I didnt get that far yet. I eyeballed a couple places, but no decisions were made. I probably wont know until i dig into it next weekend.