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Old 06-22-2015, 05:26 PM   #1
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Default Aftermarket FPR on OEM Fuel Rail

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.
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Old 06-22-2015, 07:32 PM   #2
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<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>
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Old 06-23-2015, 09:31 AM   #3
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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.
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Old 06-24-2015, 10:48 AM   #4
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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.
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Old 07-04-2015, 03:36 AM   #5
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Quote:
Originally Posted by RyanLewo View Post
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.



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Aftermarket FPR on OEM Fuel Rail-235efc0a-835c-442c-9246-5aa7d9e71fb6.jpg   Aftermarket FPR on OEM Fuel Rail-4c88c67f-75a3-419b-b721-67429db43597.jpg  
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Old 07-04-2015, 06:41 PM   #6
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Two regulators can function in series quite well. The more demanding regulator at any given manifold condition will rule the roost.

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Old 07-04-2015, 06:49 PM   #7
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Unless you need a regulator on a VVT fuel rail. Then you need one of these.
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Old 07-04-2015, 07:33 PM   #8
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Please clarify

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Old 07-04-2015, 07:36 PM   #9
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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.
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