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View Full Version : Best place to terminate the fuel lines on a Mk4 with 427 and sniper 1



HealeyBob
04-10-2025, 08:36 AM
Hello
I have an MK4 with a 427 from Blueprint. It has the Sniper 1 installed as it was purchased 2 years ago. It looks like the Sniper 1 does not use an external regulator, as it is part of the Sniper 1. I am running the fuel lines and wanted to know where you guys think I should bring the supply and return lines, too. I will be running the lines up the passenger side 4" tube. I am thinking I should run them up near the back of the engine and terminate the flex line from there.
Thanks for any suggestions.

gbranham
04-10-2025, 12:00 PM
I ran mine here for my 427 with Edelbrock ProFlo4, which does require an external regulator. Once I installed my engine, I changed my mind on having hard lines under the car and braided PTFE elsewhere...too many connection points. So, I removed the hard lines and ran braided PTFE from the fuel pump all the way to the regulator, from the regulator to the ProFlo, and the return on the bottom of the regulator all the way back to the pump. The external fuel filter is in my supply line, near the tank. Just FYI...those internal regulators in the Sniper 1 are prone to failure, so you'll likely end up using an external regulator if it fails.

Greg

212501

tnt_motorsports
04-10-2025, 12:04 PM
I have had similar thoughts as I start on my MK3 that I intend to drop a 427 into. I have used Greg's build thread for multiple things as I progress. He shows fuel line routings pretty clear in his thead.

https://thefactoryfiveforum.com/showthread.php?46723-Gbranham-s-MkIV-427-IRS-TKX-Build-Thread-Body-Is-On!