NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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- - N/A injector sizes... (https://www.nopistons.com/2nd-generation-specific-17/n-injector-sizes-8204/)

FCmaniac

11-22-2002 06:23 AM

I was going to get a spare set of 86 injectors to send to RC for cleaning. Was there any change in size or anything from 86-91 for the NA's primaries & secondaries?? Will I just need the new o-ring set for each when installing? Does 460cc sound right for the primaries?

Thanks, chris

banzaitoyota

11-22-2002 09:02 AM

The physical sizes are the same, however the impedence is different. The break was in mid 88. Rotary resurrection has a good breakbown of injector types

FCmaniac

11-22-2002 11:31 AM

Quote:

Originally Posted by banzaitoyota' date='Nov 22 2002, 11:02 AM

The physical sizes are the same, however the impedence is different. The break was in mid 88. Rotary resurrection has a good breakbown of injector types

****! figures mid-88! I want to swap in these 86 injectors into my 88. So, if the impedance is different, I can't use them, right??

FCmaniac

11-22-2002 12:08 PM

Thanks banzai, I checked the site which explains everything....

Rotarydragon

11-23-2002 09:12 AM

Yeah you can but you'd have to get a resistor block off an 86 or early 87 to do it.

dac	11-23-2002 12:28 PM

You sure about the phsyical sizes?

Mazda used square head injectors and the oval ones for the electrical connector. (In additional to the difference in the impedance).

When I went to 550cc injectors I made the mistake of not knowing this and had to change the connectors on my harness. Not a big deal, but something I wasn't ready to do.

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