It's weird, seat of the pants I could swear my old smart carb P-Tek 800R was stronger than my 800 E-Tec even though I know the #s don't back it up.
The 800R and 800RE are not that far apart. They are both Type 797 engines and not two 800Rs were running the same so I wouldn't be surprised. Also the only real difference is Carb vs Injection. As we saw with the 850RE the use of Throttle Body Injection and ERAVE opening sooner and more precise shows a much stronger Power Band then the previous tech. I really wish we had the numbers down to 5000 rpm.
It begs the question how much better the engines with only SDI or only ETEC injectors would fair with the same tech found on the 850RE, and this is what I have driving at. The +50Hp appears to be only part of the equation. As we saw with simple mods on the 1200, a few changes can make a radical difference in the whole Power Band. Imagine how much stronger the 600 and 1000 could be!
This is also the reason why I was showing a particular curve for the 1000 SDI that doesn't exist, but has real honest potential. You might have noticed the last few graphs showed it was Combined map which deserves an explanation. These are in fact real Hp number of the same stock 2005 MachZ with 4000 miles on it. The Power Band was measured with three different elevation maps that Jimmy Cooper loaded with BUDS. A fresh ECM Calibration load on a well working 1000 SDI will also show the maximum Hp. You can imagine how many 1000 SDI out there that would not show the same power of the various Calibrations not to mention the myriad of other problems.
With the use of Air/Fuel Gauges we can see in real time the reasons why not two 1000 SDI run the same. Some are running way to rich up top to make the intended Peak Power. The variance is very real and can also be seen with a remarkable difference in Clutch Tip Weight to reach the same RPM that can easily range from 16g to 20g. There are very good reasons why so many shops were pulling their hair and threw in the towel with 1000 SDI. When running right it is one of the best sleds ever made, until the 850RE. And again, imagine how much better it could be!
The better Calibrations and tighter tolerances in the later years of the 600 HOE and 800RE, especially from 2015 and up show a much tighter variance between sleds. How they are broken in and what oil they used, and the fuel chosen for the Dyno test also makes a difference in the results from sled to sled. What I like about Dynotech is Jim measures the Octane, RVP and Ethanol content.
From the graph below you can see the sections of each Elevation Map used on the 1000 SDI to draw a Combined Power Band. The curves for the 850 and 800 that I used this time were from the Amsnow Shootouts, which were all new sleds still in Break-in mode, but with good dyno runs to seat the rings. Since each graph have a proper explanation with Markups, this time I thought that I could show both Rpm and Hp
Edited by Daag44, 22 April 2017 - 04:40 PM.