Trying to plumb some AN lines and an aftermarket FPR in my 88 NA. Wasn't until I pulled the secondary fuel rail off, that I realized I probably cant fit an AN fitting where the old FPR used to be, as it looks like it's bolted on, rather than being threaded. Any suggestions on how I could approach adapting this to a -6 AN fitting?

 

FC3S Pro v2.0: Mods - Fuel System

It looks like you can tap the hole for a metric thread and then use a regular AN fitting. Never done it myself but I can't see why it wouldn't work. Make sure to keep the tap straight so the crush washer seats flat.

 

Roger that. Now I just need to find a tap that is large enough. I have a set, but idk if I have one large enough

 

The diagram shows it as M12 which is common enough to be in most sets.

If it's the M14 you might have to buy it separately.

I'd also wait for more responses before you go to it, in case I'm wrong. But based on the diagram I don't see any other way to do it. And I didn't find any adapters for the stock fitting, so that doesn't seem like an option.

 

there is this thing, https://www.rhdjapan.com/sard-fuel-p...aru-mazda.html

 

That shows compatibility for FD's but doesn't mention FC at all. Are the FD fuel rails the same size?

 

What j9fd3s had sent in looks like a viable option if it pans out. But who knows how long the part will take, cus it looks like it comes from Japan directly. I agree that tapping the rail does seem to be what fc3s pro had in mind though....

 

the NA FC wasn't sold in Japan, so a Japanese company like SARD won't know it exists

 

Ok, but the adapter should work for an FC then?

If that's the case, would something like this work?

https://www.turbosmart.com/product/f...ubaru-nis-maz/

 

yeah same thing

 

Went ahead and ordered it. Will update the thread with my results