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 Mazda RX-7s
 Turbocharged NA
 upgrade injector question
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jackhild
New Member

USA
2 Posts

Posted - Dec 20 2005 :  11:11:05 PM  Show Profile  Reply with Quote
Aaron-

I note that after you upgrade your primary injectors, you had to subract fuel with the safc, mostly in the lower rpm ranges. My question is, can the stock n/a ecu successfully handle the increased injector size when operating in closed loop, or will it run pig rich?

If it will run very rich in closed loop, what about the possiblity of running the stock primary injectors, add fuel with the safc?

I have emmission issues where I live and I am trying to do my homework before I sit on the dyno with the sniffer up my pipe. We basically have to pass two loaded tests; one is (i think)at 15 mph and one at 25 mph. Minimum of 1500 rpm and max of 2500 rpm.


Aaron Cake
Administrator

Canada
6718 Posts

Posted - Dec 22 2005 :  09:44:27 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
You won't pass emissions with a turbo-NA due to removal of the ACV.

As for the injectors, the S-AFC should compensate fine and close loop functions as designed.

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jackhild
New Member

USA
2 Posts

Posted - Dec 24 2005 :  9:08:16 PM  Show Profile  Reply with Quote
Thanks for the help, Aaron. I understand the issue with the ACV, but I will pump to the converter with either an electric pump or with a direct pipe from the factory air pump for emissions testing *IF* and only if the N/A ecu can handle the larger injectors in closed loop without running too rich.

Thanks again for your help and Merry Christmas!

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