[Formulajones]

Originally Posted by HWYSTR455

I missed where Holley instructions show to deadhead the Snipers/Stealth?

https://documents.holley.com/199r11971.pdf

Instructions and pic clearly show a bypass regulator.

Regular Sniper instructions:

https://documents.holley.com/199r11031r.pdf

Internal bypass regulator is used, return line comes directly from the throttlebody.

Many have had issues with the internal regulator, and the common corrective action is to install an external bypass regulator.

The psi issue has been addressed in numerous posts on the Holley EFI forums.

Just to say, in other non-holley installations, and in general, it is not recommended to run 2 dampers in series.



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I probably didn't explain that clear enough. The Sniper Stealths purpose is to be able to run a single line up to the unit for a "stealth" appearance. They require a regulator as they don't come with one.

What I like to do is run the Aeromotive 13301 regulator, and I have it close to the engine, and run the return back to the tank. When I said dead head I was just simply explaining the very short run of feed line from the regulator to the EFI unit of about 2 feet.

The normal way to feed these EFI units would be the feed coming into the unit and the return coming out of the unit on the other side after it passes through all the injectors, similar to how a multi port EFI system would be done with fuel rails. But that defeats the purpose of having a "stealth" EFI system.

Running fuel through the unit and out the other side helps with the fuel pulsation issues that are most common with a single dead head type of line. Although the OEM's still usually incorporate a small dampener in most cases.

So in other words, any time you aren't running the feed through the Sniper and out the other side of the Sniper for continuous flow, or any other throttle body EFI, it's dead headed so to speak.