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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 09-27-2009, 07:31 PM   #1
rex113
 
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Underdrive pulley 10-HP gain.

Has anyone installed the 25% underdrive pulley on there car yet,if so have you felt any noticable HP gains.I already have a set of shorties on the car and figured the pulley and CAI would be a good way to go. The pulley claims to add 10HP.
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Old 09-27-2009, 07:38 PM   #2
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Let see some dyno numbers on a underdrive pulley
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Old 09-27-2009, 07:45 PM   #3
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I def plan of doing the pulley. I have it on a Trailblazer SS and it greatly improved the throttle response. As far as the hp goes...I doubt it gets you anywhere near 10 but its worth it for the response. Just make sure you install a new crank bolt!!!
Did you notice an increase in coolant temp at idle?
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Old 09-27-2009, 07:47 PM   #4
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I am working with ADM Performance on a replacement pulley for my L99. Hoping to do it this week too. Whenever I get it done though, I will post the dyno graph *and* the track results, which is what really matters to me.
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Old 09-27-2009, 07:49 PM   #5
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I am working with ADM Performance on a replacement pulley for my L99. Hoping to do it this week too. Whenever I get it done though, I will post the dyno graph *and* the track results, which is what really matters to me.
Thanks I cant wait.
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Old 09-27-2009, 08:02 PM   #6
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Rex, with the stock fans and the a/c going its about 215 with an ambient temp of 80 and above. Right around 200 with the ambient temp below 80. Thats with a 160 stat. With the electric fans ( there are two and they both run at once) and with the a/c on, it never gets above 180-185 no matter ambient temp. These numbers are all at idle.
Thanks I guess the fans make up for the slower water pump speed.
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Old 01-05-2010, 03:40 PM   #7
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Quote:
Originally Posted by Red SS View Post
I def plan of doing the pulley. I have it on a Trailblazer SS and it greatly improved the throttle response. As far as the hp goes...I doubt it gets you anywhere near 10 but its worth it for the response. Just make sure you install a new crank bolt!!!

jamie was this on your 8 second trailblazer ss or low 10 second awd tbss?
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Old 01-05-2010, 03:53 PM   #8
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i heard the pully only give 5 hp
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Old 01-05-2010, 05:57 PM   #9
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Need... replacement... overdrive pulley.. for the L99... oh, and the belt too.
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Old 01-05-2010, 06:23 PM   #10
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I have baselined, installed TSP pulley kit, dyno tested, and removed pulled kit for redyno. The pulley added a confirmed 8rwhp....

We stock the setup all the time for you guys looking for one! PM me for pricing!!
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Old 01-05-2010, 06:25 PM   #11
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...We stock the setup all the time for you guys looking for one! PM me for pricing!!
For the L99 or LS3? What about the belt?
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