I bought an aftermarket FPR to get myself a little more headroom for fuel. In the past I've always had a fuel rail to go along with it. I know you can buy a fuel rail adapter, but wasn't sure how cheap (no ecu) FI kits handled it.

Can you just add the second FPR after the OEM one? Can I drill out (gut) the OEM FPR to basically use it as an adapter? Or should I just stop being a cheapass and buy an adapter or fuel rail? Just looking for the cheapest/quickest option that doesn't have any significant safety compromise.

*Edit* Further reading looks like BEGI uses their fprs in-line with the stock fpr. Just wondering if there's any downside to that option.

 

<p>This is like what I will be using soonish I hope.</p><p>Mazda Racing Fuel Pressure Regulator Rail Adapter Riser Black 2 | eBay</p><p>But with AN probably. Not sure if that fits but something like that.</p>

 

I looked at some adapters like that, I just feel like I'm going to wait 2 weeks for it to get here and it won't fit. Plus I hate spending $20 on a stupid little adapter. I bought it, hopefully it gets here soon and fits.

 

I ran into that problem pdexta when I ordered the Turbosmart TS-0402-1001 adapter from Summit. It was listed as "Mazda" but it wasn't too hard to modify it to fit. I ended up using an angle grinder to cut away material and turn the existing bolt holes into slots.

It looks like the Turbosmart TS-0402-1002 would work just in case someone follows this thread and starts a similar project.

 

The Turbosmart TS-0402-1002 does indeed fit perfect. I was in the same spot trying to find an adapter that would work with the stock fuel rail and after some researching I came across the Turbosmart adapter. Got it installed today and it fit perfectly and the bolt holes lined up perfect. I just found this thread so I figured I would add that it fits for anyone looking to do the same thing.

 

Two regulators can function in series quite well. The more demanding regulator at any given manifold condition will rule the roost.

corky

 

Unless you need a regulator on a VVT fuel rail. Then you need one of these.

 

Please clarify

corky

 

When installing a VVT engine into an NA you need to install an FPR near the rail. To go do this you either need a 99 fuel rail+90-93 FPR or an adapter.