2G Fuel line upgrade with Evo siphon

[punk3rz]

I’m upgrading my -6an feed, oem return to a -8/-6 setup.
I installed a -8an and -6an bulkhead which is why I’m installing an Evo siphon since I can’t use the dsm o ring siphon.
I had my dsm siphon drilled To 1/8” I believe with a Walbro 450 and fuel pressure was good on my hx35 93 pump 30psi.
Should I go ahead and drill this Evo siphon out or install it and see how it does first?
The ID of the hose is bigger but the hole is smaller so wondering if it’ll be about the same.
See pics...

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[rabenne]

You only need to install it long enough to run a minimum fuel pressure test. If you cant lower it to about 20-25 psi by turning the regulator screw down then you could try drilling it out. Another member on here pointed me to this website today: https://www.sixsigmatuning.com/fuel..._o9zCVf2LgaqA6GRz6eYGicPcnR_JI_B8j62Q6cVqJFQ0

it might help you decide what to do.

 

[Eclipse 1998]

Regarding your concern over the necking.

https://dsportmag.com/the-tech/education/engine-tech-air-flow-bottlenecks/