<p>oops, we dont actually have table blending yet.</p><p>But I will take pictures. Yank doesn't detail his shit online enough.</p>

Yarr, I thought that might be the case. But even just auto table switching would be awesome.

I need pictures and shit because I'm incapable of independent thought.

I'm considering this fuel pressure regulator: https://www.radiumauto.com/Fuel-Pres...ator-P229.aspx

https://www.miataturbo.net/attachmen...ine=1439337042

I found this on Radium's site after looking up the pulse damper that Codrus was using. The part I like about this particular design is that it uses an OTS Bosch OEM pressure regulator to do the sealing and regulation part but you get convenient AN fittings out the inlet/outlet.

https://www.miataturbo.net/attachmen...ine=1439337042

The regulator itself can be found in almost every Audi and VW 1.8T or 2.7T you can think of and they can be had for as little as $30 on Amazon: . That links to a 4 bar unit but they can also be found in .5 bar increments up to like 5 bar. That 4 bar one is not adjustable but it IS 1:1 vac/boost referenced. There are also adjustable ones that will work but I'm not sure I need the extra expense. Fixed is fine as long as its manifold referenced and its consistent.

Its either this guy or another Fuelab 53501, because its been proven to work. Must make decision and start buying plumbing stuff again ;)

If anyone from the Volkswagen/Audi world knows something I don't about these regulators, I'd appreciate it if you'd speak up ;)

Personally I wouldn't use the stock hardline. Adapters to/from AN for stock lines are spendy (at least, if you want the fancy aluminum ones that FM sells because they had failures with the cheap push-on ones). At $30 to convert a GM-style quick disconnect to AN, a stock hardline costs $60, which is more than just using long braided -6 AN hoses instead.

Also, the stock lines are effectively -5 (it's some metric size, but it works out to about that). If you're going to run ALLOFIT on E85 with an EFR, then -5 probably isn't big enough. So why invest a bunch of money in fittings to adapt to/from a hard line that you'll have to throw out later?

If I were doing a return-style system from scratch and not worrying about how to make it meet smog, I'd do:

- 2 of FM's AN fittings on the tank
- 2 feet of AN hose to an Earl's -6 AN fuel filter in the stock filter location
- 10 feet of AN hose to the front of the rail
- rail
- 18 inches of AN hose to the firewall-mounted regulator (or however much you need)
- 8 feet of AN hose to the tank return

It's all -6, it's all AN, nothing stock left in there to worry about E85 compatibility or fuel flow restriction.

At idle the injectors are running like 2% duty cycle, so the flow rate through the return isn't all that much lower than the feed line.

--Ian

But the pressure isn't much above stock either.

Also, the Russell fittings I linked to are the all aluminum ones and are only 15.99

Meh. I appriciate the feedback but I already have enough of the Russell adapter fittings to do the job, plus a second NB main fuel line as well.

Here is the current revision:
https://www.miataturbo.net/attachmen...ine=1439353396

As for -6AN fittings, I'm only a few short at this point. I know exactly what I need for under the hood, its the 4 fittings between the Russell adapter and the main fuel line that I need to figure out. Its 4 fittings because my fuel filter already has -6 inlet/outlet. The barb fitting adapters are quite inexpensive and readily available. They are also not nearly as critical as the pressure bearing side so I have no worries there.

If the fuel line is in fact -5 equivalent and I find the limits of the line, I'm not sure -6 is going to be that much of an upgrade. At that point I probably need to go -8 or turn down the boost. I'll also need something like Bosch 044 to support that much fuel, and then I need to start thinking about an Getrag or 8.8 IRS and something other than a Miata 6 speed...

Its only a 6258 :)

<br />
<br /><br />
<br />OK faefae :)

See? That's exactly it. I'm sure stock fuel line will be fine. Sure. Yeah, sure... :party:

<p>Plz go back to stock fuel rail. I'm genuinely curious what the limit of stock fuel components is, but don't want to be the one to test...@turbofan were counting on you :)</p>

lolnope!

I'm not going to be running more power than Ari (99mx5). He is on more stock components than me so look his way.
<br />
<br />I'd like to see 350 whp. If I do, great. If not, oh well. I'll be happy with 325 as well. Nice round numbers. Uncorrected.
<br />
<br />Gordon I have no idea what you're talking about. Seems you're waaaayyyyyy over thinking this.
<br />
<br />What's wrong with the plastic push on fittings? The stock fuel line is standard plastic push fittings. Isn't that good enough?

<br /><br />
<br /><br /><br /><br />
<br /><br />Stock push on fittings don't see 90psi of fuel pressure (60psi base+30psi boost). I did some searching and couldn't find a single mention of pressure ratings on those things. Probably going to call doorman tomorrow.
<br />
<br />Though you can always just turn down the base pressure.

Why are we running 90 psi again? Where's that coming from? I thought it was like 43.5 psi base, and is it 1:1 after that with the stock NA regulator? So that'd need 46.5 psi boost...<br />
<br /><br /><br />
<br /><br />Or is that not how it works?

AFPR. But yeah, were going to extreme cases. G what fuel pump. I think I'm gonna return my dw200 for a 300.

-6 has 50% more cross-sectional area than -5 does, due to that lovely r squared factor in the formula. 3.14*2.5*2.5 is 19.6, 3.14*3*3 is 28.2.

--Ian

We? No, just me. The NB runs 60psi base pressure and I plan to continue running 60psi base pressure with the AFPR and return system. If you are using the NA regulator you'll be seeing 43.5psi base. Add your boost pressure to your base pressure and thats what you *should see on the high side of the fuel system.

* This of course assumes a perfect system with no loss due to fittings, turbulence, restrictions, etc... you get the idea.

So Ed, you got it right, no worries there.

I'd have no problem running the factory NB fittings at 43.5+25=68.5psi. I'm more worried about 60+25=85psi. that freaks me out just a little bit. I'M NOT SAYING I'M GOING TO RUN 25~30, this was just a number I pulled out of my ass. Though the turbo is probably capable of doing it :giggle:

Exactly. I'd prefer to plan for the extreme and get some headroom than ride the edge.

Currently have a DW200. When E85 happens I'll look at stepping up to the 300 and heavier gauge feed and relay for power.

Absolutely true. But we've already seen lots of guys hit 350+ on the stock lines so I'm going to try not to worry about it right now. When E85 happens I'll re-kajigger it all with -6 from the tank to the fuel line. Pinky swears.

I can hear 18psi laughing at me and face-palming from somewhere to the north... :party:

Why not just turn down base pressure? You have enough injector for it. I'm only contemplating turning mine up because I have smaller injectors.