Fuel tank vent??

[5.7 hemi]

If you're running a FI engine, is a tank vent needed? Or is a vented gas cap gonna get the job done? I have a vented gas cap but would like to know what is the best route to go.

 

[Revhendo]

I've been doing FI conversions for years and the vented cap has always seemed to have been fine. I built a few systems that really moved alot of fuel and those tanks had provisions for vents that I used. I couldn't say wether the vented cap would've been enough on those or not. Sorry, it's late, I hope that helped.

 

[5.7 hemi]

Every bit does help. It would not be a big deal to install one later if the gas cap doesn't work out.