3/8 fuel line

[concape1]

I have a MK4 and I'm putting in a 351w block bored to 427 w/ 538hp with a mechanical fuel pump for a Holley double pumper. It was recommended by the Engine Factory to use a 3/8 fuel line. Do I need to change out the tank pickup and fuel filter that comes with the complete kit to a 3/8 also?

[efnfast]

I have no idea what comes w/ the kit, but you can only flow as much as the tightest connection. So if you need 3/8'' fuel line, the pump inlet/outlet needs to be at least that size.

[edwardb]

Short answer -- yes. Going through the same thing right now with my Mk4 build. Changing to 3/8 fuel lines. The FFR parts are all 5/16. Mark at Breeze sells a nice 3/8 fuel pickup for carb setups: http://www.breezeautomotive.com/details.php?prod_id=300

[concape1]

Thanks for the info and link

[Gumball]

I have the Breeze pick-up on my carb'd 347 and it is great. Fit perfect out of the box, but make sure that you follow the instructions to ensure that it doesn't bottom-out in the tank and restrict fuel flow.

[tirod]

If any part of the fuel system uses flexible rubber lined hose, please remember to use only hose that meets SAE J30R14T2. It's not a emissions resistant hose as much as an alcohol and additive resistant hose. Unfortunately, we don't get to use retro gas any more.

[RGHarvey]

Just finished changing out lines intended for fuel injection with teflon-lined lines. See this article about new fuel lines.
http://www.hotrod.com/techarticles/engine/hrdp_1101_performance_fuel_hoses/viewall.html