Join Date: Apr 2010
Ferrari Life Posts: 2,197
Because I’m just not busy enough with the V12 and house projects.....
Mark, you poor fellow. It sounds like you're feeling bored, neglected and unloved. I'm sure all your buddies here can help you out if you need a few more projects?
Speaking of which...... I could use some help/advise on an air distribution issue I'm having with a twinscrew supercharger on a DOHC V8. The supercharger's discharge is right above the front 4 cylinders, so they're getting all the air and run lean until the manifold pressures up. We compensate for this by tweaking the individual injector trims, then take out the tweaks when it's on boost, but this is a bandaid approach because it's obvious the front 4 are carrying the load of the motor down low.
It would be much better if we could balance out the air flow and encourage some of it to go to the rear holes, not just the front 4. The manifold design is just a simple, single plane type plenum.
I'm leaning toward putting some slide throttles inside this puppy with a pneumatic actuator to restrict the front 4 a bit while it's under vacuum conditions, then letting them open up under boost. Not the simplest solution to be sure, but then why do something simple when the complicated solutions are so much more interesting?
'99 550, Rosso Corsa / Nero, S/N:114654, Assy: 31836, Engine: 52084
High mileage, low compression, and missing on a few cylinders.....just like my cars.
Maranello Skunkworks Team Member