So I have been fighting with this fuel system since the car went together.
Have had issues with the fuel leaking from the filler neck, raw fuel coming out of the vent, fuel leaking out of the fuel pump at the tank. Its been fun.
So after smelling fuel for the last time I decided to order some (lots of parts) and remount the pump and reconfigure the entire vent system on the car.
A couple of notes for anyone reading through this thread and looking for fuel pump info. Having run both the aeromotive setup and the Holley drop in retrofit setups I can without a doubt say that the Aeromotive is a better engineered product. If I had it to do over again I would have put the Aeromotive in tank pump in.
But here we are so here we go with trying to fix it.
So when Holley sells this they give you a foam ring, the problem is the foam ring compresses thinner than the flange height so unless you have a .125" thick fuel tank, the foam ring compresses before this assembly is tight on top of the tank. I had tightened the pump down on initial install and retightened later down the road. When I pulled it apart the last time it was clear that these were over tightened and the rubber was pushed out. I believe all of this could be avoided by them machining the top of the assembly different.
Clearly this was not sealing.
Holley was nice enough to ship me out new hardware after I told them my issues. So 5 new bolts, 5 new washers and a new foam ring.
Next up was Revising the vent. The setup I had on it was vented from the stock sender, up a loop, and out a rollover valve mounted inside the fuel filler door.
The vent line out of the Holley assembly was going to the factory line attached to the filler neck.
So the first update was swapping those two. The new setup will be quite different. First new part going in is an in tank rollover valve. I rotated the openings on the rollover valve to be from the right and left then the vent line is now a -6 out the front of the assembly.
I cut a cork gasket to take up the too high flange height and installed the new foam ring.
Ready to go back in with all new hardware.
So new plan for the vent line is off the front of the pump, instead of the side so hoping to limit the fuel slosh out the vent from side to side.
It is aluminum line over to the passenger fender and a huge loop up to the rear window and down by the filler neck.
Then out of that into a fuel catch can then out of the catch can top vented out the buttcheek.
I fabbed this up out of some plate and a 3" mandrel bent stainless 45, a little bit of plate and some fittings.
All plumbed up with -6 an stuff. Pretty happy with how this turned out.
Got it buttoned up this morning and took it out for a trip. The first time I have driven the car and had it not smell like fuel both inside and out. Filled it up with no issues. drove across town and back.
I am truly hoping that I can move on with other stuff now but wont know until the next track day.
Now to fix a few pesky interior rattles.