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Old 02-01-2007, 05:26 PM   #1
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Default what injectors

im going to run 7psi what injectors do u guys recommend?1.6l
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Old 02-01-2007, 05:46 PM   #2
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If you can, the easiest thing is to pick up a used set of 94-97 or 01-05 (better choice) injectors. They suppy 265cc which is good for around 180-190rwhp at 100psi of fuel.
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Old 02-01-2007, 08:23 PM   #3
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i found some 04-05 mazda speed injectors and do the plug right in?

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Old 02-01-2007, 08:48 PM   #4
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Don't know if those will plug in, but the 1.8s would work great for 7+psi. Cheap and easy.
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Old 02-01-2007, 09:20 PM   #5
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Quote:
Originally Posted by 90miata View Post
i found some 04-05 mazda speed injectors and do the plug right in?
Yes, roll with it. FWIW, the speed injectors are the same injectors as found in all late NBs.
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Old 02-01-2007, 11:08 PM   #6
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Quote:
Originally Posted by flashlegs View Post
Don't know if those will plug in, but the 1.8s would work great for 7+psi. Cheap and easy.

Somebody hasn't read my FAQ


The best thing about the 01-05 injectors is the pintle cap, they are designed to run at 60psi vs. 50psi. They supposedly have a better spray pattern and atomize the fuel better for greater effiency. Especially when using an FMU system.
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Old 02-02-2007, 11:43 PM   #7
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well thats solved... other question is do i have to drill and tap my oil pan for oil or is there a hose i can tap into?
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Old 02-02-2007, 11:46 PM   #8
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well thats solved... other question is do i have to drill and tap my oil pan for oil or is there a hose i can tap into?
oil for what? turbo supply or return?
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Old 02-03-2007, 11:09 AM   #9
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either or
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Old 02-03-2007, 01:19 PM   #10
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I got some 1.8s ... pm me
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Old 02-03-2007, 02:15 PM   #11
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It is always better to tap the oil pan for the return, but on the 1.6 there is a oil return port next to the oil filter.
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Old 03-18-2007, 02:47 AM   #12
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how much psi can i run on the 05 mazda speed injectors i got 15psi?
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Old 03-18-2007, 03:09 AM   #13
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depends how much fuel pressure you run them at. id say about 190rwhp at 100psi of fuel. need to know more about the setup and how much power you are making. and what you use for fueling.
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Old 03-18-2007, 07:09 AM   #14
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it all depends on the turbo size eficiency,, injectors, cooling., FP, and your own tastes. I ran 12-13 psi on 1.8 injectors when i got the safc and 117 psi of FP. Before the safc and about 100psi i got about 10 on my small 16g wich could flow as much as 500 cfm at that pressure ratio. FWIW tdo4 int he greddy kit flows 428 cfm at 15psi. to give you a size reference.
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Old 03-18-2007, 11:52 AM   #15
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90Miata, I just looked through your past 20 posts and I have some suggestions.

First, Braineaks FAQ here has all the basic information you need, including the answer to you injector question and oil tap question. Read through it all the way: https://www.miataturbo.net/forums/showthread.php?t=4288

Second, could you do us a favor and fill out your signature with all the parts you have purchased and give us a general idea of your build plans and goals.

Third, your post indicate that you've purchased a Greddy kit, Walbro 255, that you want 15psi, and that you're interested in MSM injectors. That much boost with those injectors and a Walbro 255 is not the best idea. I suspect some major conflicts with your goals and the parts you're buying. Before you spend more money, let us help you.

Fourth, in this post back in November, you indicated that you were building a killer motor w/NOS and looking for boost advice: https://www.miataturbo.net/forums/showthread.php?t=5780
Did you build that motor? If so, a Greddy Kit is the wrong answer, which you were told about back in November, which you indicate in anther post that you bought back in early January.

The guys on this forum are awesome and will hook you up with the info you need to make the right decisions with minimal mistakes for the best price... but you gotta meet us halfway. Post you goals and parts (not just turbo stuff, but all you mods) and let us make sure you're on the right track.
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Old 03-18-2007, 11:52 AM   #16
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so your saying i can run 15psi then i have forged weisco pistons 8:5:1 and a safc ,16g turbo, front mount , fuel regulator, boost controller i wanna push 13 to 15 psi
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Old 03-18-2007, 12:32 PM   #17
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If you have enough fueling/cooling you can do that yeah. fueling is gonna be hard. but not impossible. cooling is also a big Q? so get more specific. Search on what i and Vrtsid as well as what jahunis have done. We all have 16g turbos. Weiscos are nice but not necessary until 300+ whp
good insurance though
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Old 03-18-2007, 01:03 PM   #18
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Quote:
Originally Posted by 90miata View Post
so your saying i can run 15psi then i have forged weisco pistons 8:5:1 and a safc ,16g turbo, front mount , fuel regulator, boost controller i wanna push 13 to 15 psi
You CAN push 13-15psi or more on a bone stock motor if properly tuned.

What kind of fuel regulator and boost controller?
Does the SAFC do timing? If not, you'll need something to control that.
Fuel pump? General consensus around here for a fuel pump Walbro 190hp.

So, what about the rest of the car? Tires/wheels/dif/clutch/suspension?
And, what about your goals? What kind of power do you want?
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Old 03-18-2007, 01:46 PM   #19
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timming whats that







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Old 03-18-2007, 02:00 PM   #20
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that's the thing that keeps our ringlands in one piece. :gay:
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