Originally Posted by arse_sidewards
I assume you're running a rear radiator.
Are your radiator fans heating your fuel cell? The lack of airflow over the engine isn't helping anything.
If your fuel is starting off at 100deg+ it's not gonna need to sit very long in the fuel rail to turn it into vapor especially if the engine is just sitting in all the heat coming off the exhaust.
What fuel rail pressure are you running? You could down-size the injectors and up the pressure.
Yes, is it a rear mounted radiator, which sits above my fuel cell. This is the same design and mounting configuration that I've been running for a few seasons now.
The hood has a few louvers and should theoretically be moving air .. especially on some of the higher speed sections. Oddly enough I started having issues towards the end of lap one, before having to slow it down for any of the more major rock trails.
The fuel pressure runs at a steady 58 PSI, thought I am measuring it back at the tank after the regulator.
What's odd is that this was never an issue before .. then again, I suppose most of my local races are shorter duration.