sprint200 Posted April 24, 2008 Report Share Posted April 24, 2008 Many may know that my car is extensively modified. Those mods, however, had been limited to the suspension with the exception of a VMP tune and muffler delete. Early last month I installed the C&L intake along with VMP's stock appearance 2.65" pulley and 91 octane tune. The SOTP index factor was big. But as everyone is aware, it loses a bit of "oomph" as it gets hot. Shortly after installing the parts we dyno'd the car (sorry, no stock baseline). The results were pretty good, knowing that the numbers are all relative to multiple factors down to and even including on which version of software the runs are being viewed. The predictable thing that we noticed was the drop in power from the first run to the last. Here's a shot of teh graphs from that dyno session. Shot at 2008-04-23 Then PSE Superchargers took the blower and ported it (no stage 1 or stage 2 stuff....they only port one way.....complete). The car was back together just in time to load it up and take it to the Lone Star Round Up down in College Station. Two days on the track told me that the power loss from heat soak were not as pronounced. But I had to wait due to work load and weather before getting the car back to the dyno. Here are those results Shot at 2008-04-23 Note that the second run produced more power than the first and the drop off on the third pull is very slight. There were only 7 to 8 minutes between runs during both the before and after sesions with NO other cooling aids besides a couple of fans on the nose. Both sesions were with the hood closed and the temperatures & barometric pressures were almost identical. Also, there were NO other modifications besides the porting. NO change in the tune, pulley, h/e........etc. I have a spread sheet showing the intake temperatures and the charge air temp's somewhere and can't find it right now, but I'll post that when I find it. But the bottom line was that the charge air temp's dropped by an average of 13 degrees after the port. IIRC they never got above 112 deg F even on the last pull. I've got all the digital files from the runs, but I'm not "tech-savvy" enough to know what to do with them. I'll still change out the s/c heat exchanger for those August afternoons here in Oklahoma, but it's not nearly the issue it was before the port. Thanks PSE and Ed! Job well done. Link to comment Share on other sites More sharing options...
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