Uncle Arthur

Will the standard fuel pressure regulator attached to the fuel rail be sufficient for post-boost, or should/could it be upgraded to say a replacement from a factory turbo'd car (e.g. Nissan Exa)?????

Any pros/cons either way?

turbored

No it will not be sufficient. Most people put on an aux regulator.

Uncle Arthur

Does it have to be a high cost aux pressure regulator, or will my suggested other option be sufficient???

TIA

turbored

will it fit on the Miata rail? Are you building your own rail? in theory, a properly sized factory FPR for a turbo car should be able to do what you need. However, they're not adjustable so it may not allow the fine tuning you'd want.

Mach929

iTrader: (3)

since the miatas computer doesn't really understand boost you'll need a fpr that increases fuel pressure as boost rises to add more fuel under boost. factory fprs don't really do that

Joe Perez

iTrader: (8)

Flyin' Miata has some old AFPRs on sale right now (Tue, 10 Oct) for $25 as the Deal of the Day. Even if you have to rebuilt it, that's a hell of a deal.

Braineack

iTrader: (62)

You can buy used vortechs all the time on the cheap.

https://www.miataturbo.net/forums/showthread.php?t=4943