Fuel System, Injectors, Emanage, Oil Lines, Breather Line... ECT - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-07-2006, 11:37 PM   #1
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Default Fuel System, Injectors, Emanage, Oil Lines, Breather Line... ECT

I just bought a '99 MX-5 with a bored out built 1.8L running a T-25. The previous owner spent all kinds of money on this build, some of it was mispent in ways i'd have done different. I'm in the process of researching and planning out what I need to do to make this setup awesome and more than capable of 10-12 PSI when I want it, if I want it. So I have tons of questions and have been doing a ton of research but need some clarification.
So i've spent the past 3 days reading, reading, and reading somemore as well as discussing with my roommate who also has a miata about what I need to do to my car to make sure that it will continue to be good to me.
Here's my current setup from the previous owner. I'm still learning things about this car as I get under and around all the engine bay.

Engine:
1.8L Bored for 9:1 compression
Wiseco Pistons / Pauter Rods / New OEM Crank
Voodoo ECU Piggyback from Flying Miata
Greddy Manifold
T-25 Hybrid (Saab, Pontiac, 300zx donors)
Spearco Intercooler
Tial 35mm Wastegate (7psi)
Tial BOV 12lb spring
Custom IC piping Blue Powdercoated & Valve Cover

It's running all stock fuel system with the Voodoo box. Currently under boost my Fuel/Air gauge is reading lean but on FM's site it says that my gauge will do that with the stock o2 sensor. What o2 sensor should I use instead to get a good reading?

-I want to get a BEGI FPR to make sure I have the correct pressure coming in. Should I upgrade my fuel pump as well to a 190HP? How many psi can I run with stock injectors?
-If I wanted to run 10 psi i would upgrade my pump, regulator and most likely my injectors. Then I would need new ECU management. Would the Emanage blue suffice because it appears to be a very cost effective solution with alot of room for upgrades?
-With the Emangage i noticed that 330cc injectors are the limit for that system, would that be enough for 10 psi?
-My BOV currently mists a little oil into the engine bay. Is this because my crankcase breather isn't routed to my intake before the turbo? It currently has a little filter from autozone or somewhere on it.
-What sort of tuning can be accomplished using the Voodoo box that the previous owner bought instead of using his head and getting the Emanage? I know there are adjustments but would I have to get on a dyno to benefit from any Voodoo tuning?
-OH yeah, if you look at my VBgarage, the piping to my Tial wastegate is crazy and I'm yet to see anyone using this setup. Anyone know a better way of doing it?
-My oil lines to my turbo(oil only setup) are rubber and I'm not a big fan of them. Is it ok to just run straight braided hoses to and from the turbo? It looks like I should use a 1/2" ID drain hose but when it comes to the inlet i don't want to over pressurize the seals in my turbo. Would 3/8" be restricted enough to keep my seals feeling good or would i need another restrictor inline to the turbo to keep the pressure down?

Ok i'm going to stop at this and pray that someone has some time to look this over. Till then, back to the search button. Thanks so much guys. I'm astounded at the info in this forum. My friends are about to kill me because all i talk about is Miatas.
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Old 10-07-2006, 11:49 PM   #2
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You need to plug up all the ports to avoid oil in the intake or route it like brian and Braineack are always telling me to do. 10 psi would be pushing it on your NB becouse as i have stated just a few minutes ago you have a deadhead fuel system and a Rising rate fpr like the begi unti wont work for you you can change the fp by changeing the restrictor in the tank and get more base and overall pressure but your best bet short of rediesigning the fuel system is to go with some kind of ecu stuff and elf or power card will run out of steam past 8 or so psi. but an emanage and some 330's or a split second aux injector will allow for about 240 or so crank hp or a little over 200 whp. at your stock 60 or so psi of fuel pressure a 190 would be a waste in your case as well as the stock pump is more than adequate at lower pressure levels and ht eonly real advantage of the 190 is the better high pressure flow. also you need a wide band 02 sensor as the narrow ones we use only show down to abotu 14 or so -1 and we need to be atleast 12.8-1 while in boost also if you are lean while in boost more than a narrow band likes you are in troubble figure out why.
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Old 10-07-2006, 11:52 PM   #3
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Any hydraulic store like parker can ake you custom teflon inner bradied lines to replace the rubber crap you have now expect to pay around 100 bucks for this though.
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Old 10-08-2006, 12:49 AM   #4
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Awesome i'll look into the lines asap because the rubber ones are bogus and I like the security of braided. I'll research the wideband 02 sensor. Know any off the top of your head that i should focus on?
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Old 10-08-2006, 12:57 AM   #5
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I dont know to much bout them but lm-c is supposed to be good as well as aem and i be greddy makes one as well. you will need to but another bung somewhere inyour exhaust system to do it properly right now i suspect you are running of the unused side of a 4 wire narrow band 02 sensor.
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Old 10-08-2006, 01:25 AM   #6
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This week I'll figure all that out. I was just recommended the AEM uego system by a few people, so i'll look into that more. Thanks for the info man.
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