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NB Fuel damper conundrum
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Hi folks...hoping someone can shine some light on my confusion:
I have a 1998 (1999 USA) NB being rebuilt for turbo. I splashed out on the FM fuel rail which is a nice bit of gear now I have it in hand. My question relates to what I thought was supposed to be a damper on my stock fuel rail (being an NB) but looks like a FPR rather than a damper? My unit in the picture below has a return coming out of it and a vacumn port? Is this an NA fuel rail FPR? https://www.miataturbo.net/attachmen...ine=1464660749 https://www.miataturbo.net/attachmen...ine=1464660749 |
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Originally Posted by Calmdown
(Post 1117501)
Apparently there is/May be a variant fuel rail for the 99-01? The fpr on the front has a part number of BP5B 795300-3730. It has a return line and a feed line parked up front near the throttle body. There's a few threads on here about it, but nothing definitive.
Under a Mazda parts search, it shows the 2001-2002 moats with a 13290c pulse damper in the front. Shows the same for all of them. Now I'm really confused. Are mk2/2.5 fuel rails the same? I've got a 99 coming in anyway, so does it need to be a mk1 1.8 fpr, or can I use a 1.6 as well? Just asking because I'll be calling junkyards to see what they have . So my plan is to run the FM fuel rail, fuel line and filter arrangement as per this: https://www.miataturbo.net/attachmen...ine=1464662949 Given I have a FPR on the rail, can I assume I do not have one in tank? Secondly, I am going to run an aftermarket FPR as per the above so should I just get the 99+ damper BP4W20180 to mount to the rail, OR should I just plug the port on the fuel rail and not worry about a damper? Its all very new to me, sorry. TIA |
Euro NB1s had return-style systems. You'll need to verify this, but I believe your fuel system is basically an NA system.
Do not follow that FM schematic for the NA. Get a regulator adapter and use a 2-port FPR. Their setup basically converts it to a returnless system which is inferior. |
Originally Posted by Savington
(Post 1335337)
Euro NB1s had return-style systems. You'll need to verify this, but I believe your fuel system is basically an NA system.
Do not follow that FM schematic for the NA. Get a regulator adapter and use a 2-port FPR. Their setup basically converts it to a returnless system which is inferior. |
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