"Ever done an intake pressure test?"
you're probably thinking of measuring the pressure at the exhaust? if so, I did not do such a test has turbo .63 ar hot side this may be the cause of high egt, what should be the maximum pressure in the exhaust manifold.
I have such a rich-fuel ratio so that the lower the temperature because it goes beyond 900 degrees at full speed third gear. I can send you the entire map and you look threw what could be wrong
Like Erik said I meant an intake leak test, I made another post here about how to do that :
http://195.159.109.134/vemsuk/forum/index.php/topic,1451.msg15111.html#msg15111While tuning you can monitor the exhaust manifold pressure right before the turbo to get an idea of how much load you are putting into the turbo. You must use some kind of mechanical filter to dampen the pulses. You only need to drill maybe 1.5 mm hole and use a brake line nipple to connect a pipe for the first part away from the hot exhaust, then use rubber line up to a mechanical gauge or appropriate MAP sensor (7 bar capable).
Once you start to have more exhaust back pressure than intake boost pressure you must be careful. Any intake leaks will stress the turbo a lot more and create higher exhaust back pressure.
The A/R of the hot side of the turbo is not important, 0.63 tells me absolutely nothing - the wheel is the real obstruction and you generally need to know the turbine wheel inducer/exducer measurement. Most likely this turbo is using old technology, sure it could be brand new - but still use old tech. I have seen modern diesel turbo chargers that are larger than what you have spool a lot earlier, these are new/high tech with low pressure efficient turbines.
You are wrong to run super rich, you kill the efficiency of the combustion. The most effective way to lower the exhaust gas temperature is to use more ignition advance, up to the point where you become knock limited. If you get to that point you need to make mechanical changes to the engine to use that kind of boost pressure. I would sort out the engine and tune at a lower boost to begin with, so that you don't grenade the engine while testing these changes. It's a progressive process and takes time, but not so slow if you use good methods. Make sure the basics work first. KISS = Keep it simple stupid.
You should upgrade to 1.1.81 firmware and VemsTune, then go from there, it is much more capable.
