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SDCE spring tensioner final results
SDCE spring tensioner final results Started off with the mods listed below on a 99 SS A4. The original pulley on the P1SC was a 6 rib 3.4. Numbers with that pulley were 423 rwhp/416 rwtq. The only changes to the set up were the 8 rib SDCE spring tensioner with the 3.4 pulley and the ATI superdamper. The final results were 518 rwhp/466 rwtq. If anyone is considering the SDCE spring tensioner I would say go for it. 
Last edited by JAMES RODRIGUEZ; Nov 7, 2005 at 10:41 PM.
Originally Posted by 1FST99Z
wow. so you gained that much power just from the dampener and 8rip setup. sweet
The SDCE crank pulley is larger diameter then the stock ATI pulley. If you are still using the 3.4 blower pulley then you are spinning the blower faster. Stock 6 rib ATI crank pulley is 5.9" and the 7.25" SDCE lower pulley is quite a bit larger and spins the blower quite a bit faster. 43K at 6000rpm with the stock ATI crank pulley and 52.5K with the SDCE crank pulley if you use the 3.4 blower pulley with both.
10K impeller RPM will probably get you 3-4psi at least so thats where most of your extra power is coming from plus the belt was probably slipping some with the 6 rib if 423 was all you could get with a 3.4. But no doubt the SDCE setup is the way to go, you would never get that impeller speed reliably with the 6 rib setup, plus very little belt tension and belts last forever..
10K impeller RPM will probably get you 3-4psi at least so thats where most of your extra power is coming from plus the belt was probably slipping some with the 6 rib if 423 was all you could get with a 3.4. But no doubt the SDCE setup is the way to go, you would never get that impeller speed reliably with the 6 rib setup, plus very little belt tension and belts last forever..
Originally Posted by kp
The SDCE crank pulley is larger diameter then the stock ATI pulley. If you are still using the 3.4 blower pulley then you are spinning the blower faster. Stock 6 rib ATI crank pulley is 5.9" and the 7.25" SDCE lower pulley is quite a bit larger and spins the blower quite a bit faster. 43K at 6000rpm with the stock ATI crank pulley and 52.5K with the SDCE crank pulley if you use the 3.4 blower pulley with both.
I know the crank pulley is larger. That is one of the reasons I went with the SDCE setup. I was not clear enough at the beginning, but yes I did have the whole SDCE setup installed (SDCE spring tensioner/SDCE crank pulley).
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Originally Posted by JAMES RODRIGUEZ
I know the crank pulley is larger. That is one of the reasons I went with the SDCE setup. I was not clear enough at the beginning, but yes I did have the whole SDCE setup installed (SDCE spring tensioner/SDCE crank pulley).
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