i cant offer any help, but your setup sound awesome. I thought about going miata a few times myself.

 

You use the word "miata" like one might use the word "gay".



rofl.

Yeah, it should be pretty damn nice...when it's actually running correctly.

 

haha well, when you drive a miata you have to prepare yourself for the onslaught of 'homosexual' coments slung your way. People make fun of them until they get on the auto-x tarmac...

 

Yeah, I've heard my share of the homo jokes.

 

The noise from the AFPR sounds like the diaphragm is probably oscillating.. I don't know what to tell you on that one.. Maybe the vacuum signal is oscillating too, which is makin ghte AFPR do that. That may have something to do with that vibrating noise also. You may have damaged the AFPR when you were having fuel pump problems though..

 

Squeaking noise is gone, probably due to fuel pressure being pretty high.

Vibration was my exhaust coming into contact with my transmission tunnel.



Car still feels like it's running out up top above 4500 though. No clue what could be causing it.

 

I'm guessing it's either a turbo flow problem, which I doubt, or you need more tuning than a rising rate regulator can provide. The GT28Rs supposedly flow enough for 250-290 HP, so I don't think that's an issue.
I don't know much about Miatas, but do they have a knock sensor? The ECU could be sensing knock and putting the brakes on your fun.. You should really look into getting a wideband air to fuel gauge, or at least borrowing one. You're flying blind right now, and I'm guessing your problem is still fuel system related.

 

It could very well be running out of air if it's only set at 8psi or whatever it's running at.



Your not exactly moving a ton of CFM there..

 

Update for Cman: Today while adjusting the AFPR a piece snapped off due to shitty design. He's going to be getting a new AFPR.

 

It was only running 7 psi today, so that is entirely possible. Nothing will be happening until this AFPR is replaced though.