My buddys M8T I have helped with tuning/ modifying. Runns 15 psi 240hp messured in a dyno at sealevel, 25% 100LL 10:1 comp + A LOT of work done to it. Have a tread on the norwedian forum, you can see on some pics whats done with the sled..http://www.scooterforum.no/index.php?threads/my-toy-08-m8-bd-turbo.5964/page-7
You are talking about corrected hp. Remember that when at 10000ft you are at much lower actual hp and at higer degree of work of the 28rs. There are drag people running 25psi with lower otcane than Avgas.. But of course with a very develped engine with big turbo.
Try to do this your self at your altitude, then come try this at sealevel and it gets much harder. It require a lot of work/ tuning to get the engine to last here here at higer actual HP. I know the 28rs is very smal in a 2 stroke for this hp, but this is whats max on the 28rs for mountain riding.. If running 10-12 psi the engine runs much smoother, at 14-15 psi we have to use very rich mixture to get the engine to survive and then its very hard to get it tu run clean all the time. At belowe 10psi there is no problem to tune the engine at all. It was pretty strange that Sunvang could not get his Silber kit running ok at very low 5psi.Yeah it only misfired a couple times and goated once in a 15 second climb.... 14# at sealevel with a 153 and the ski's dont come out of the snow. keep up the good work. Try a 3071 at least, thank me later. you should be just about doubled stock HP at 15#.... not 240.
these are the people judging your downpipe silber, i wouldnt worry to much.
Should?... Have you put it in a dyno, then you see the result. You never get the same hp increase in a 2 stroke as you do on a 4 stroke. There is a lot of people here that have dynoed M8T and everybody gets disepointed how much boost they need to get 200hp. Need 10 psi to it above 200hp mark on a stock M8 engine with 28rs turbo. I have seen dynoruns from higer altitude, the higer they go the higer corrected hp tghey get..
10 psi is where the M8 is working best for the boost money and safety here..I gess it was 250prm diffrence on 12 psi to 14 psi with the same weights..
The increase above 10 psi much less, 15 psi is only to get whats max usable on this 28rs.. I will go for a bigger turbo next time with more lag
25psi is to get MAX on a dragsled, using NOS to get the big turbo to beginn spinning..
Anyway at altitude it seams like the Silber is working ok for the money.
At sea level we have always had a lot of problem bying turbo kits, pipes, bigbore and other tuning parts if they where only developed at hige altitudes..Even ported/piped sled at sealevel I have had to lower the compression to get it work without detonation on long pulls..
