For you guys already running the 62mm supercharger pullley: Was the OEM fuel system sufficient, or were upgrades required?

Do you have logs of a wideband O2, fuel pressure, injector duty cycle, or other data showing that the fuel system was OK or not OK?

 

Don't have mine yet but I won't be monitoring all that. I will monitor fuel pressure, 02, but nothing else... I know there are some modified ones out there, but Rudy hasn't shipped them yet...hopefully this week they will ship...

 

All I can add are - Steve's thoughts....
https://www.crossfireforum.org/forum...tml#post645557

oh and of course.....take it or leave it.....my calcs suggest you need 580cc to maintain at least 12AFR at 6200rpm and 800cfm (62mm pulley+ supercooler)....550cc without a cooler...(ie: 36F hotter= 6% less density/power)

But as you quite rightly pointed out and in line with Steve's logs....my cfm and cc's may be 5-10% high...but that's not such a bad thing though when designing.

 

Isn't 12+ AFR sort of "risky"?.... Staying in 11's I would think would be much prefereble, especially at WOT. If going 12, should measure knock retard too. Aeroforce Scangauge can monitor two parameters at once on a single gauge if you are going to push it. Better safe than sorry. XFire engines I am sure are not cheap to rebuild.