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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 04-02-2010, 02:32 PM   #61
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Man you guys have me thinking seriously about E85 again... Though it is not convenient to travel to the station on a weekly basis I could pretty easily store several 55 gal barrels at my house and refill there. And if I need range, I can just load a different map into the Adaptronic for pump gas. 18psi I'l be watching what you come up with closely.

So if I am following this correctly, one can get away with 1000cc injectors, a returnless system, and a Walbro 255HP (already have that) at about 300-350 HP? I know the flow rates are higher with E85, but I have had my car up to 18-19 psi (GT2871, so say 300-350 RWHP) on pump gas with stock returnless, stock fuel rail, Walbro 255HP, and 550cc injectors and the AFRs were fine. Going with large injectors should help this since even if the rail pressure drops a bit at the higher flow rates, it can be offset with more duty cycle (assuming atomization is still OK).

EDIT:
These injectors?
http://www.t1racedevelopment.com/en/...-injector.html
$115 each for new, good performing injectors is not bad IMO.

Last edited by ZX-Tex; 04-02-2010 at 03:01 PM.
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Old 04-02-2010, 03:35 PM   #62
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Originally Posted by gotxqss View Post
Nothing off hand for a link just passing on info. I asked my boy about big inj not idling and he said he can get the 2k ones to idle like stock. All in the tuning. I doubt ill ever need that big of an injector so ill prolly get 1600 to be safe. Might wanna get crazy and slap a 35r in there sometime
No disrespect meant to your buddy at all, but I have not even seen a 2000CC injector for a street gasoline vehicle and even with good engine management making 1600s idle like stock is tricky. This is according to people who run vastly more than 450WHP.
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Old 04-02-2010, 03:36 PM   #63
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I've seen 2000's. Or at least was told they were 2000's. In an evo
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Old 04-02-2010, 03:37 PM   #64
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Originally Posted by 18psi View Post
I don't need anything larger than 1000cc.

I HAVE heard lots of evo owners report that getting 1000's to idle properly is not that hard. Don't know if that can be said for miata's. Sav confirms this so Sounds like it does.
My 950 FICs idled like stock on my 4G63 with just a bit of adjustment to the dead time, and I was able to get LTFTs withing about 2% with them. I lost a bit of feul economy, going from like 27MPG to about 25MPG on 91 octane.
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Old 04-02-2010, 03:44 PM   #65
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Quote:
Originally Posted by ZX-Tex View Post
These injectors?
Injector Dynamics 1000cc Saturated injector
$115 each for new, good performing injectors is not bad IMO.
These are exactly what I have, the red top ones. The red top is actually the "adapter top" that they are talking about, and matches the ID of the Miata rail. Savington is talking about cutting off the black plastic piece on the bottom of the injector above the blue tip oring. This is also what the guy I bought them from said, although he recommended getting a thinner tip grommet than my Miata one in addition. I have the thinner grommets coming Monday, I can report back if they helped fitment. Be aware that the clips don't come with pigtails, or at least mine didn't, they are weather pack clips that you have to assemble onto you inj harness.
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Old 04-02-2010, 03:47 PM   #66
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those look like damn decent injectors. I wish they made COMPLETELY drop in/plug and play ones though. I hate splicing into ****
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Old 04-02-2010, 04:06 PM   #67
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18, dude, if I end up getting mine to work, no one should have a problem. As a bonus, at least on the NA, you can remove just the inj harness out of the car after unclipping the injectors, the ECU water sensor, and one ground wire. Then you can work on it right on the bench. Not sure if the NB is the same, but you should check.
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Old 04-02-2010, 04:08 PM   #68
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NB injectors are a PITA to swap
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Old 04-02-2010, 04:22 PM   #69
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Quote:
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NB injectors are a PITA to swap
I know there are a lot of vac lines and **** going to it, but if you take the top half of the plenum off it shouldn't be too bad(?). I'd be curious, anyway, since I have the same head/plenum as you: Y2K 4W.
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Old 04-02-2010, 04:26 PM   #70
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taking off the top plenum, all the vacuum ****, all the wires, all the other bs. Just a PITA. Not hard, just time consuming
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Old 04-02-2010, 04:31 PM   #71
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UR as lazy as I am. We should "meat"
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Old 04-02-2010, 04:32 PM   #72
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only if you drive to CA
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Old 04-02-2010, 04:36 PM   #73
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on way, CU
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