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injector question

Old 03-18-2008, 08:37 PM
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hi i have A 90 miata its stock right now but i plan dropping turbo it once spring comes i wanted to know if i could just drop a set of RC 440cc injectors in with the stock ecu and have no problem running th car because im going to buy a greddy kit and add on to it over the summer with every thing from a intercooler to new down pipe and blow off valve. i also wanted to know is the MSD ignition boost retard will help with the knock or will i still have to set the timing back on th cam gear. thanks
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Old 03-18-2008, 08:46 PM
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Use of the shift key will help you get more replies.

Answer to dropping in 440's: Probably Not.
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Old 03-18-2008, 08:47 PM
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Originally Posted by mr.wiggly View Post
hi i have A 90 miata its stock right now but i plan dropping turbo it once spring comes i wanted to know if i could just drop a set of RC 440cc injectors in with the stock ecu and have no problem running th car because im going to buy a greddy kit and add on to it over the summer with every thing from a intercooler to new down pipe and blow off valve. i also wanted to know is the MSD ignition boost retard will help with the knock or will i still have to set the timing back on th cam gear. thanks
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Old 03-18-2008, 09:27 PM
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The conventional wisdom on this forum is that the largest injector the 1.6 ECU is able to idle properly are 330cc, and even that is with a lot of fiddling to the AFM.

Also:

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Old 03-18-2008, 09:28 PM
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The car will never idle. The largest iirc you can run are 330's and that requires tweaking the MAF.


Please use the search button.
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Old 03-18-2008, 09:31 PM
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Old 03-18-2008, 09:41 PM
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Originally Posted by levnubhin View Post
Please read this and then read it again.

https://www.miataturbo.net/forum/showthread.php?t=4288

Then after you do that search on each topic heading on this board and read everything. After all of that is done put together a well thought out string of questions in a post and put on some asbestos underwear.
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Old 03-18-2008, 10:57 PM
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The RC 440's are not PnP you have to get the adapters to connect to the stock ones or the pigtails, and you would need a new ECU to control those stock one cant, and search...
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Old 03-18-2008, 11:02 PM
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thanks i have been looking into doing a MegaSquirtPNP with the injectors but do i use low or high Resistance with the MegaSquirtPNP and is there any thing els i should know or need for the MegaSquirtPNP
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Old 03-18-2008, 11:06 PM
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The MSPNP is recommended for use with high-impedance injectors.

I don't mean to be rude, but these are all questions that are concisely answered in the Megasquirt FAQ's page on this site.
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Old 03-18-2008, 11:09 PM
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sorry im still trying to go throw every thing and find a lot of answer thanks for the advice tho
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Old 03-18-2008, 11:10 PM
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+1 i used to be like you, you shall get the hang of it in a while. But i do believe someone did you low impedance injectors with the ms...but yes high is recommended but the RC 440s are high.
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Old 03-18-2008, 11:16 PM
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Originally Posted by mr.wiggly View Post
sorry im still trying to go throw every thing and find a lot of answer thanks for the advice tho
It's no problem. I realize it can be very overwhelming.

I see you are planning on a Greddy kit. Were you intending to buy new? For not a lot more money you can have a far superior entry level turbo kit manufactured and supported by an American company with GREAT product support (something that is frankly a huge problem with the Greddy kit). Take a look at the Bell Engineering (BEGi) BEGi-S turbo kit.

http://www.bellengineering.net/Pages...ems_BEGiS.html

The kit comes with a much better turbo, an INFINITELY better downpipe, much better manifold (the Greddy one is VERY crack prone), much better Fuel Management Unit. Basically, take every component in the kit and put the words "much better" in front of it, and you'll catch my drift. And it's only slightly more expensive than a new Greddy, but worth much much more in terms of component quality.

Also the kit is directly upgradeable to BEGi's higher level turbo kits. You're pretty much on your own with upgrading a Greddy.
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Old 03-18-2008, 11:16 PM
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Did you miss the part where they said that you should capitalize the correct words and use punctuation?

Anyway, you can use either high or low but people see better results with high.

When you are considering a product, read the manual.
http://www.megasquirtpnp.com/mspnp_installation.htm
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Old 03-18-2008, 11:19 PM
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Seriously, if English is your first language, use it to the best of your ability. Nobody here is gonna make a big deal over a typo, but when a new guy comes here asking simple questions that are answered in the forums FAQS or can't follow basic grammar rules, your not gonna get much help. Odds are they will either ignore you or post something that's has nothing to do with what your asking.
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Old 03-18-2008, 11:25 PM
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Originally Posted by miataz View Post
+1 i used to be like you
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Old 03-18-2008, 11:35 PM
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thanks for the link to begi leave it to a nub to ask a question thats probably been asked 10 times thanks for the help tho i am going to go with the begi kit instead

o one more nub question at what is the amount of boost if any can i get away with. with out having to retard my timing for knock or is it just better to go with the MSD ignition boost retard
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Old 03-18-2008, 11:36 PM
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Originally Posted by reddroptop View Post

yeah seriously, nice try miataz
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Old 03-18-2008, 11:40 PM
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Originally Posted by mr.wiggly View Post
thanks for the link to begi leave it to a nub to ask a question thats probably been asked 10 times thanks for the help tho i am going to go with the begi kit instead

o one more nub question at what is the amount of boost if any can i get away with. with out having to retard my timing for knock or is it just better to go with the MSD ignition boost retard
10-12 is generally recommended on a 1.6. 15 psi is doable, but anything over that is pushing it on the stock 1.6 connecting rods. You will have to retard your timing. You can gain some back if you run a Bipes ACU (easiest, but least configurable) or a piggyback (like a Greddy Emanage Blue) or if you run a Megasquirt PNP, which will solve all those problems (and create a whole different set, but that's for another thread.)

I'm trying to help you out, but once again, every one of the questions you just asked are easily found with a search. Just in case you haven't seen it:

READ THIS THREAD IN IT'S ENTIRETY.
https://www.miataturbo.net/forum/showthread.php?t=4288
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Old 03-18-2008, 11:56 PM
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thanks ill look be for i ask
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