I found out that one radiator was not quite enough in spring conditions.
Shoot for 12.5:1 AFR on full boost, but instead of airplane fuel, I recommend 50% mixture of 110 octane with 91 pump. This is what I have been running in turbo YZs for 10 years. I run lower compression with 15 pounds of boost, but that fuel mixture is also good for stock compression with 10-11psi. This all depends on the elevation you ride and how you ride. I ride at 6000-10,000ft
Yes I also found that out this past saturday as it started overheating after some real cliff climbs! Was out on Gallagher hill and lake Anne, this thing pulls like frickin beast!! It really blew me away by how much more power it added!
Few problems though:
1- Sounds like it needs to be tuned after all. when revving in nuetral, at like 1/4-1/3 throttle it cuts out like theres a rev limiter and sounds like its almost misfiring. Under boost though it just hicups a lil in that throttle range.
2- boost gauge was only reading vacuum pressures for some reason??:face-icon-small-con is it a bad sensor?
3-at idle AFR was around 11.8, sorry I wasnt able to get a reading at boost I was too excited and too scared to look down lol.
I also forgot to be looking at my temps and uncover the radiator because I was having to much fun!
4- the BIGGEST PROBLEM is- it died just as we were turning around to go back home :Cry: it sounded like it was running out of fuel, I stopped to refuel, wouldnt start back up even with a good tow. I need to get it up over a hill about 150 yards long. tried towing with a sled and it wouldnt get enough traction on the soft snow.
Any ideas for how to get it out? Im thinking to put a snowboard under the track strap it in and give it a go. It appears that the track makes too much resistance for the sled so a snowboard underneath it should solve the problem.
