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2011-2014 Mustangs
Power-Adders
Torque booster on paxton
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<blockquote data-quote="Shaun@AED" data-source="post: 15143795" data-attributes="member: 32381"><p>Traditionally we see the 3.33" pulley on a Vortech S/Si trim with 6-rib will be OK without slipping assuming a good belt with good tension is used, however the bigger the blower the more issues we have with belt slip as it takes more power to turn larger compressors.</p><p></p><p>The old-school at the shop with 25psi YSI setup has to use a brace between the crankshaft and blower pulley in order to not bend the crank snout with the belt tension used to keep the belts from slipping using a 8-rib configuration. In fact we have to make a break-in 1/8th mile run then re-tighten for each new belt in order to not slip excessively.</p><p>Without the brace another YSI car that was recently at the shop made 10psi with an extremely tight belt, and tightening it further netted 12psi, but it was pullied for 16-18. We could not tighten the 8-rib belt enough to stop belt slip on the dyno.</p><p></p><p>I recommend the 8-rib setup with the torque booster application in order to ensure belt slip is not an issue when tuning, and not an issue as the belt breaks in (they increase in length over time).</p><p></p><p>I also recommend the Boss IM with the torque booster as boost will stay flat once the wastegate opens, which means the power curve will mimic NA, so power will peak at 6500RPM with the stock IM (assuming the Waste gate has opened) but with the Boss IM you'll have an extra 1000 usable RPM at a higher Power level.</p><p></p><p>Given the recovery RPM after a shift, the Boss IM will out ET/MPH the stock IM with the torque booster.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15143795, member: 32381"] Traditionally we see the 3.33" pulley on a Vortech S/Si trim with 6-rib will be OK without slipping assuming a good belt with good tension is used, however the bigger the blower the more issues we have with belt slip as it takes more power to turn larger compressors. The old-school at the shop with 25psi YSI setup has to use a brace between the crankshaft and blower pulley in order to not bend the crank snout with the belt tension used to keep the belts from slipping using a 8-rib configuration. In fact we have to make a break-in 1/8th mile run then re-tighten for each new belt in order to not slip excessively. Without the brace another YSI car that was recently at the shop made 10psi with an extremely tight belt, and tightening it further netted 12psi, but it was pullied for 16-18. We could not tighten the 8-rib belt enough to stop belt slip on the dyno. I recommend the 8-rib setup with the torque booster application in order to ensure belt slip is not an issue when tuning, and not an issue as the belt breaks in (they increase in length over time). I also recommend the Boss IM with the torque booster as boost will stay flat once the wastegate opens, which means the power curve will mimic NA, so power will peak at 6500RPM with the stock IM (assuming the Waste gate has opened) but with the Boss IM you'll have an extra 1000 usable RPM at a higher Power level. Given the recovery RPM after a shift, the Boss IM will out ET/MPH the stock IM with the torque booster. [/QUOTE]
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