Hello:
I have a 90 Mazda RX7, 5 speed with 13B FI. What years of 13B FI motors can I bolt into this car? How do I tell what year of 13B I'm looking at if it's already out of the car? I plan to take off the
stock exhaust and put a header on it. The original motor spins freely, just has no compression, stuck apex seals. Looking to take one motor out and put another right back in. If you can help with
any info please e-mail answer to Armilite@aol.com
Thanks
Rich

That's a good question. My guess is any manual transmission 13B will fit.
I can only tell the difference between a 87-88, 89-91 and 93-95 turbo and then
only by looking at the turbo charger. I can also tell a six port from a four port
but as far as I know Mazda never put a four port NA in an RX7.

Paul Lamar
 
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