Another RX7 AFM thread...

m4vr1k · Post by **m4vr1k** » Sat Sep 03, 2011 6:41 pm

I know there are dozens of RX7 AFM threads around, but reading them all only deepens my confusification.
I have a S4 RX7 AFM. I want to put it in the Mazdarati, preferably with a reliable, step-by-step guide. I know that it plugs into the factory loom, and I know you have to fiddle around with the vane spring tension, but how many clicks is the ideal? and how will I know if the car is running lean at WOT? What other pitfalls are there in this mod?

Any clarification is really appreciated.
Zac

WideOpenThrottle · Post by **WideOpenThrottle** » Sat Sep 03, 2011 8:22 pm

I have read that this only makes a minor improvement to air-flow....don't forget that what goes in must come out so i think a sports exhaust would be a must -have if fitting the RX7 AFM!

aidwano · Post by **aidwano** » Sat Sep 03, 2011 11:08 pm

It made a big difference up top on my motor with mild cams.

I ran a wire from the oxy sensor into the car and hooked a multimeter onto it. Checked the voltage with stock AFM at full throttle and then adjusted the RX7 to match (actually made it a little leaner as the stock AFM looked rich)

Pitfalls? Not much really. Cold start is a bit rougher and prob a bit less power below 2000rpm. But my other mods dont help this and its not major

m4vr1k · Post by **m4vr1k** » Sat Sep 03, 2011 11:39 pm

How much did you adjust the spring tension?

aidwano · Post by **aidwano** » Sun Sep 04, 2011 9:18 am

I cant remember exactly. I think i started with 7 or 8 clicks and adjusted from there.

brownie · Post by **brownie** » Sun Sep 04, 2011 9:49 pm

and do you have the right AFM ?
Just go to remember US conversion uses a NON Turbo AFM,Tend to be a bit hard to find here in NZ,As most S4 RX7's are import Turbo,They have a larger opening than the Non Turbo type.

m4vr1k · Post by **m4vr1k** » Sun Sep 04, 2011 10:55 pm

I'm pretty sure it is a non-turbo AFM. Will check the numbers with Mazda tomorrow.

mazline · Post by **mazline** » Mon Sep 05, 2011 4:43 pm

Should be N326

SLYDIT · Post by **SLYDIT** » Wed Sep 07, 2011 7:13 pm

(rushes off to check mine)

m4vr1k · Post by **m4vr1k** » Wed Sep 28, 2011 6:16 pm

Mine says N318 on it. Guessing that its a turbo one then

Another RX7 AFM thread...

Another RX7 AFM thread...

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