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Old 10-09-2006, 12:01 AM   #1
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Default Fuel pressure regulator - stock or not?

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?
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Old 10-09-2006, 12:14 AM   #2
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No it will not be sufficient. Most people put on an aux regulator.
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Old 10-09-2006, 03:27 AM   #3
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Quote:
Originally Posted by turbored View Post
No it will not be sufficient. Most people put on an aux regulator.

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

TIA
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Old 10-09-2006, 03:32 AM   #4
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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.
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Old 10-09-2006, 09:13 AM   #5
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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
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Old 10-10-2006, 11:23 AM   #6
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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.
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Old 10-10-2006, 01:24 PM   #7
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You can buy used vortechs all the time on the cheap.

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