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-   -   Bigger injectors on stock '96 ECU? (https://www.miataturbo.net/diy-turbo-discussion-14/bigger-injectors-stock-96-ecu-6247/)

SamS 12-17-2006 11:21 PM

Bigger injectors on stock '96 ECU?
 
I know you 1.6 guys can mess with the clockspring in your AFM's to run bigger injectors, has anyone tried running bigger injectors on stock 1.8 ecu's, specifically OBDII?

I read somewhere, probably here, that the OBDII ecu should be able to compensate better, but how big could I go and still idle?

magnamx-5 12-18-2006 06:29 AM

300s should work with a safc i ran 460s for a while but driveability sucked.

SamS 12-18-2006 12:42 PM

I couldn't even run 300's on the stock ecu? I thought I'd at least be able to do that much. I'm just planning ahead, I'd like to be at 10-12 psi some day. I have a BEGi AFPR and Walbro 190HP, so I'll be upping the pressure on whatevr I end up with.

olderguy 12-18-2006 12:54 PM

If you own the 300's try them. No big deal to switch them out and see if the ECU can bring the AFR down to a good idle.

Ben 12-18-2006 12:56 PM

I think you'd be fine. 300 is just over 10% bigger than stock... which barely flows more than stock at idle. 269 cc/min vs 238 cc/min at idle pressure

Braineack 12-18-2006 01:18 PM

I'm thinking it'll be ok. could be slightly more rich at idle, but im going to go with not much.

SamS 12-18-2006 02:21 PM

How about if I add an electric supercharger to lean it out a little?:noes:

Braineack 12-18-2006 02:26 PM

now you're cruisin' for a bruisin'

SamS 12-18-2006 02:34 PM


Originally Posted by braineack (Post 65752)
now you're cruisin' for a bruisin'

I haven't heard that saying since we learned about the 50's in my American History class a few years ago.

Braineack 12-18-2006 02:36 PM

i like to keep it real.


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