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    1. #40
      Join Date
      May 2010
      Location
      Chattanooga, TN
      Posts
      137
      Country Flag: United States
      Update on LS3 480 HP Hot Cam performance in 1/4 mile.

      At LS Fest I got to take car down the strip. 12.03 ET, 117.93 MPH, 1.96 60' foot time. Lack of Traction was not part of problem with 60' time. Didn't even spin the tires, but bent the rear end torque arm on 1st run, and a little more on second one because of how well car hooked up. By the way, car has 50/50 weight distribution. With fuel as run, it's 129 lbs heavier on rear. Approximate weight with driver was 3625-3650 lbs.



      Because car was so close to running in 11's I've decided to try and get car in the 11.2 to 11.5 range even if I can't get 60' time in the 1.6 range but stay in 1.9's instead. Converter is stalled at 2800 RPM for a reason and I want have it restalled just to try and get 60' time down.

      Below is what happened by swapping LS2 MAf out with LS3 style one. Notice how that change TQ curve. Notice also that at 5225 RPM peak TQ and HP were are nearly the same. Peak HP stayed at 360 and peaked at same RPM as before change. That means I need to modify intake air tube so that the two 3.0" tubes merge to feed 4.0" tube feeding throttlebody or change out tubes for 4.0" ones. Will be a coupe of months before I can work on getting that done.

      Before MAF change.



      After MAF change.



      Here are a few more pictures of the reason why I want car to run solid mid 11's. It's because it was built to dirve. It's not a show car, just a Pro Touring one.












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