- Nov 26, 2007
Have 250 miles on my alpha now, first 170 miles 100% stock. Best stock sled I have ever riden. Really considered keeping it stock, but I have a really good running 18’ cat 153 if I wanna ride a stock sled. Put the Silber turbo on a couple weeks ago. Really a super easy install, maybe took 3 hours. I’ll probably add a manual boost controller, boost gage and BOV at some point in the next couple weeks. We ride mostly at 8500 to 10,500 feet. First ride filled with pump 91 octane. Hit the det sensor a couple times going up the trail around 7500-8000 feet. Figured I’d take it easy until I got to altitude and figured the det would go away at 10,000 ft. Det continued to happened at high altitude. The low end bog everyone has talked about on the alpha Silber turbo was terrible. Really made it a not fun riding experience. The mid range and top end were pretty good, but couldn’t stay in it long cuz it would det. Only pulling 8100 rpm. So a bit disappointed for my first ride. Got a new tune on Christmas Eve and got it out yesterday. Also pulled a couple grams outta the weights and added 2 gallons of 110 race to 91 pump. Yesterday ride totally different. The alpha turbo totally screamed! Low end throttle response seemed pretty much perfect. Pulls like crazy throughout the rpm range. Reving out to 8400-8500 rpm. No det codes this ride with the added race fuel. Pulled some pretty long, steep and deep pulls, skis in the air all the way up until you let off. I usually run a little race with all my “pump gas” turbo anyway. Silber does not advertise this as a “pump gas turbo” either, so dont expect it to be one. I think if I play with the waste gate a little I could get the boost down to run straight pump 91. Coming from someone who is not trying to sell you a kit I would totally recommend this kit for your alpha now that the tune is where it needs to be. Don’t think most guys will benefit from any gages. I’m not going to put on an AFR gage because I see no reason too. There is no fuel to adjust, so I just don’t see the point. It runs pretty much perfect and that’s all I need.