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Rebuilt & Modded Roush TVS
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<blockquote data-quote="olaosunt" data-source="post: 14176719" data-attributes="member: 131643"><p>Great thread and please continue to provide updates.</p><p>Don't mean to hijack this thread but wanted to share my similar plans and recent experience.</p><p>I too just had a Boss long block built with stock compression. I broke the crank off my old 9.5 compression alluminator with a 2.9 whipple/10 rib cobra jet/20 % ATi damper set up . Not sure if it was the heavy damper, inherent problems with the crank or me hitting the rev limiter-probably a combination of all the above.</p><p>I am now somewhat afraid to go back to that set up especially if I race the car again.</p><p></p><p>I had a Roush TVS which I sold after going to the Whipple set up and was fortunate to have been able to buy it back.</p><p>Justin is sending my 8 rib pulley conversion and 5% damper out today and I just shipped my TVS to steigmeir for the snake bite drive and venom cooler as recommended. I am starting with the biggest 8 rib pulley-82, which with the 1.3 drive and 5% OD should spin the blower to 21,225 rpm at 7500 engine rpm.This is close to what the 63(will not fit the ROUSH) and the 5 % OD spins it to on Rebecca's car and Justin says it should make about 18 psi.The 8 rib pulleys come in 82, 75, 69 and 63 so I could pulley down to a 75mm to get to 20 if needed although that may be over spinning the blower.</p><p></p><p>While I am waiting on the TVS and breaking in the engine/rebuilt RXT I may just put back the Whipple for now.</p><p>Below is a comparism of what the engine made with the TVS/69mm pulley at 15 psi and the 2.9 whipple/3.25/20 %OD at 18 peak psi (average 16-17)-obviously on different days</p><p>The Whipple is red and the TVS blue</p><p></p><p>[ATTACH]15781[/ATTACH]</p></blockquote><p></p>
[QUOTE="olaosunt, post: 14176719, member: 131643"] Great thread and please continue to provide updates. Don't mean to hijack this thread but wanted to share my similar plans and recent experience. I too just had a Boss long block built with stock compression. I broke the crank off my old 9.5 compression alluminator with a 2.9 whipple/10 rib cobra jet/20 % ATi damper set up . Not sure if it was the heavy damper, inherent problems with the crank or me hitting the rev limiter-probably a combination of all the above. I am now somewhat afraid to go back to that set up especially if I race the car again. I had a Roush TVS which I sold after going to the Whipple set up and was fortunate to have been able to buy it back. Justin is sending my 8 rib pulley conversion and 5% damper out today and I just shipped my TVS to steigmeir for the snake bite drive and venom cooler as recommended. I am starting with the biggest 8 rib pulley-82, which with the 1.3 drive and 5% OD should spin the blower to 21,225 rpm at 7500 engine rpm.This is close to what the 63(will not fit the ROUSH) and the 5 % OD spins it to on Rebecca's car and Justin says it should make about 18 psi.The 8 rib pulleys come in 82, 75, 69 and 63 so I could pulley down to a 75mm to get to 20 if needed although that may be over spinning the blower. While I am waiting on the TVS and breaking in the engine/rebuilt RXT I may just put back the Whipple for now. Below is a comparism of what the engine made with the TVS/69mm pulley at 15 psi and the 2.9 whipple/3.25/20 %OD at 18 peak psi (average 16-17)-obviously on different days The Whipple is red and the TVS blue [ATTACH]15781.vB[/ATTACH] [/QUOTE]
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