I started to do a little homework online and found out the "big boys" were running 520- and 600-cc big bore kits. I learned pretty quick that my mountain horse needed more ponies. If I said that I didn't miss the sound of the TIAL wastegate. Gaining elevation straight up the mountain on a 50-hp machine just isn't the same as it was on the turbo sled. Now the dilemma: These steep tree lines are steep! The snow here in northern Utah is dry and deep for at least the first two months of Lines and nastiest drainages where my 200 hp snowmobile would have been tips up (for the record, I haven't had to use a shovel to dig out I realized that I matter how good of a rider I was, this "horse" was not exactly made for racing snowmobiles to the warming hut.Īs the season progressed I found myself getting off the trail as soon as possible and ripping through trees on my way to the steepest tree So, the first time I left the truck on a 55-horsepower KTM 500 XC-W, I had my doubts. I personally came off an intercooled Boondocker-equipped HCR 800 that made over 200 Just like a majority of newbie snowbikers, I crossed over from big-mountain backcountry snowmobiling. With that being said, I've always had a the desire to push anything with a motor to its limits. Of the front bumper of my mom's Buick Regal. We will need the Cam specs and the rev intentions to insure the heads are at your needs.A wise man once said to me, “Son, not all horses are race horses.” I'm pretty sure he told me that after finding weeds and dirt hanging out If the revs are to be at the 4500 and higher range on full boost and yet still need power out of the turns, then we offer our performance “Big Valve Head”. We do know that there are racers out there, and we do also make a head for the track and seriously aggressive drivers. ![]() And if the “off boost” is where we drive 70% of the time, then the higher flow numbers of a “larger valve” head means slower moving air and a low to mid range loss where we don’t want to lose it. We keep the stock valve size with a 5 angle performance valve job (flow cut on the valve) to maintain the good street manners, and yet with the correct port work in the runners, bowls and throat, it will pull hard till you reach the red line when on boost! Velocity is the key to a small displacement engine, as we are NOT on boost all the time. Our Stage 1 Street Performance Heads are modified to work with the basic mods used by most MCS drivers - the pulley, exhaust and CAI, yet still allow more power when a camshaft or other future modifications are added. Keep the low to mid range for the stop light to stop light drive and still have all the additional power needed for the higher rev aggressive driving we all love on the occasional Track Day. Power to keep the daily commutes fun and exciting. Our Ported Cylinder Heads reflect this idea. Our intentions are NOT to try everything, but to try and decide the best bang our buck! However, we will try to be a little bit different, as we will share all the data we have noted on those items, from OUR own cars, with actual road tests (SOP meter) and the Dyno sheets. When we find a procedure or an item that will increase the torque and the power levels, we will offer it up. in street conditions, where the airflow is poor.Īlthough we are primarily interested in Performance Cylinder Head Modifications, we will look into other mods also. The cooling fans at the dyno are primarily to cool the engine and NOT used to super cool the I/C, which will give an incorrect “actual” H.P. We try to keep it as real to the actual driving conditions as possible. The gains of power are proven on the Dyno. ![]() You can count on the products you see on this site to have been tested and installed on our own cars. We are dedicated to increase the performance of our MC and MCS through expanding new ideas and prior experience from our own engine building and racing experience.
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