Hey guys, I had some thoughts regarding the reliablity of the TT V35. Let me know what you think.

Often many people simply say that forced induction is bad for an engine out of ignorance or group think. As a former aircraft mechanic, I can tell you EXACTLY what is bad for an engine. I have seen some engines go 4000 hours between overhauls (and then, only valves replaced) and others make it less than 300. The key component of these, regardless of forced induction, was fuel management, more precicely, EGT and CHT. As you may or may not know, detonation causes the cylinder head temperature (a thermal barrier between the cylinder and the exhaust gasses) to become disrupted. This can destroy and engine in seconds because the very hot EGT is transfered directly to the cylinder, and the resulting metalurgy is affected (IE, holes in the cylinder, skuffs in the walls, etc) The best solution to this issue in aviation up until recently is been to run pig rich, where the excess fuel causes lower EGTS and lower CHT's. The negative aspect to this is fouled plugs, valve deposits, and much higher fuel consumption.
Up until recently (not including the big radials of WW2), the only way to run a fuel injected a/c engine was on the rich side of the EGT graph

due to the poorly distributed air and fuel (remember, one **** for fuel and non aerodynamic intake manifold) A company devoloped injectors for Lycoming engines which, through a bunch of techno mumbo jumbo, evens the distribution. This allows one to run on the lean side of the EGT curve, where the excess air, not fuel, cools the EGT and the resulting CHT. What occurs is a cleaner burn, lower fuel consumption, and longer engine life.
Well, what does all this mean for the V35. I think that the knowledge from aviation can certainly carry over to the automotive applications in that, if we can monitor each CHT and each cylinders EGT, we can adjust the a/f ratio of each cylinder and not just the engine (keep in mind that some distributions of a/f are so lousy that an engine is essentially 6 small engines running in parrallel) With this technology, we can encorportate a "cruise mode" that will run on the lean side of the curve, resulting in lower emmissions, lower fuel consumptions, and longer engine life. By altering the a/f of each cylinder, we can make reliablity of forced induction applications a reality. Let me know what you think

 

You can do this with a stand alone engine management system, of which many exist, however, they are out of many people's price ranges.

 

Im surprised more people havent chimed in on this. I am not aware of any stand alone system that can control individual injector pulse and distribution.

 

try posted in the Forced Induction part of the site (i think its under the Engine/Drivetrain section). a lot of more technically savvy people would probably have more input there