DennisG01
Member
So, for a while now I've been tracking some numbers with various turbos. Although there's a couple other "tests" I've done, the main one I've been concerned with is a hill "climb", so to say.
Let me start by describing my method. I've tried to keep things as much "apples to apples" and unbiased (ie, no "seat of the pants" comments) as possible. The weight behind the truck is always my boat - a 28' cruiser that weighs just a few pounds under 10K - for all practical purposes it weighs 10,000lbs. While we two this boat everywhere from the Chesapeake Bay in MD to the coast of Maine, we also take it to local lakes, here in PA. On the way to one of the lakes is a nice highway that happens to have a good hill, approximately 1.1 miles long (from the place where I pull over to a pole at the top of the hill). I start in the same place (from a standstill) every time and go flat out the whole way up. Hopefully the numbers, below, are easy to read on your monitor (they are on mine, but I know sometimes things get screwed up from one internet browser/monitor to the next). Click on the table to view full-size.
If you take notice, the 2nd and 3rd lines are with an ATT turbo - but I was one of the ones that received the wrong sized housing - hence the high EGT's. As seen in other threads, Dennis (Slim Shady) is on top of this and I will re-do the test once I get the correct housing. Although, as my boat is now shrink wrapped I won't do the test again until the spring since I don't think it would be a fair comparison between a boat with a cockpit cover on and one wrapped in a big, plastic bubble. Hmmmm... maybe I should have waited till the spring to post this thread?
The "Mitsubishi" turbo is courtesy of Turbine Doc - thanks Tim!!! Generally speaking, though, you can see the numbers are relatively similar (except, of course for the EGT's with the wrong sized ATT). I'm excited to try out the new (correct) ATT and hoping that will provide some noticeable improvement over what I've seen so far. One thing to keep in mind is that I have an 18:1 engine, so my results may be different than those of you with 21:1's.
As a side note, I also want to say that Dennis (Slim Shady) has been absolutely fantastic to deal with. He never once led me to believe that I would be "stuck" with that wrong-sized ATT. I know he received some flak (unjustified, in my opinion) a while back, but I have talked/emailed/texted with him more times than I can remember (including before, during and after all that trash talk took place). Many times, it was he who initiated a new conversation to find out how things were going. No question about it - he's a stand-up guy.
*IAT: No IAT's for the first two lines as they were performed before I had a means of measuring it. I now use the ScanGauge II.
Let me start by describing my method. I've tried to keep things as much "apples to apples" and unbiased (ie, no "seat of the pants" comments) as possible. The weight behind the truck is always my boat - a 28' cruiser that weighs just a few pounds under 10K - for all practical purposes it weighs 10,000lbs. While we two this boat everywhere from the Chesapeake Bay in MD to the coast of Maine, we also take it to local lakes, here in PA. On the way to one of the lakes is a nice highway that happens to have a good hill, approximately 1.1 miles long (from the place where I pull over to a pole at the top of the hill). I start in the same place (from a standstill) every time and go flat out the whole way up. Hopefully the numbers, below, are easy to read on your monitor (they are on mine, but I know sometimes things get screwed up from one internet browser/monitor to the next). Click on the table to view full-size.
If you take notice, the 2nd and 3rd lines are with an ATT turbo - but I was one of the ones that received the wrong sized housing - hence the high EGT's. As seen in other threads, Dennis (Slim Shady) is on top of this and I will re-do the test once I get the correct housing. Although, as my boat is now shrink wrapped I won't do the test again until the spring since I don't think it would be a fair comparison between a boat with a cockpit cover on and one wrapped in a big, plastic bubble. Hmmmm... maybe I should have waited till the spring to post this thread?
The "Mitsubishi" turbo is courtesy of Turbine Doc - thanks Tim!!! Generally speaking, though, you can see the numbers are relatively similar (except, of course for the EGT's with the wrong sized ATT). I'm excited to try out the new (correct) ATT and hoping that will provide some noticeable improvement over what I've seen so far. One thing to keep in mind is that I have an 18:1 engine, so my results may be different than those of you with 21:1's.
As a side note, I also want to say that Dennis (Slim Shady) has been absolutely fantastic to deal with. He never once led me to believe that I would be "stuck" with that wrong-sized ATT. I know he received some flak (unjustified, in my opinion) a while back, but I have talked/emailed/texted with him more times than I can remember (including before, during and after all that trash talk took place). Many times, it was he who initiated a new conversation to find out how things were going. No question about it - he's a stand-up guy.
*IAT: No IAT's for the first two lines as they were performed before I had a means of measuring it. I now use the ScanGauge II.
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