Re: Turbo or not to turbo
OMGuar wrote:Trevor57 wrote:If you are out of boost on a racetrack you are doing it wrong, so running rich shouldn't be too big of a problem.
What?
Running rich is lousy! It fouls plugs, won't make as much horsepower, and requires more frequent fuel stops..
You shouldn't limit boost according to the track.. you need to limit boost according the the engine..
Boost will eventually destroy an engine if over boosted.. Over boosted engines fail with a bang Whereas engines underfueled (because of boost) melt down..
Really no differance in the end.. However usually a melted engine can be repaired. While a over boosted engine is merely suitable for scrap..If you are tuning fuel pressure to be stoich at whatever boost you are going to run, then the car will be rich when you are out of boost, but fine when you are WOT. My point was that if you are on a racetrack you should be either braking, or at WOT 98% of the time, so the small amopunt of time spent at partial throttle is almost meaningless.
Amount of time spent at partial throttle like mid corner?
Elkart Lake Wisconsin is one of the fastest road race tracks in the nation.. 4 miles, 3 big long straights. According to a friend running Indy cars 70% wide open throttle is record lap times..
Other tracks have more time spent in finese.
Tuning to stoich.. is nearly impossible without some sort of boost sensor. something not in regular EFI. Only those with Lambda sensors (O2 sensors here in America) stand any chance at all of of being correct with regard to fueling..then under full boost conditions.. Part throttle fouling plugs is far more likely.. It's like trying to paint the Mona Lisa with a barn painting brush.