PPC Tuners are ready for HHR!
We did several hand timed runs at mid 13's and 108 indicated recently. Judging by the well documented times for the Cobalt with the tune, I believe the 13.8 @ 103 is right on for the HHR with the tune. Upgraded intercooler, exhaust, track tires might get it close to the magic 13.
Just a quick update on boost levels. I had commented that the boost seemed to be a bit less than when first installed, but that does not seem to be the case after all. I have been running a partial race gas mix to get the Cali octane up to 93, so that may have something to do with it. At any rate, regardless of gear (1st thru 5th) full throttle boost at 2500 rpm is 25 psi, tapering off to 22 psi at 3500 rpm, then (20 psi at redline verified thru 3rd only). This little turbo has virtually instantaneous response when you punch it, which makes me reluctant to upsize it since it is perfect for everday backroad fun. Avg speed =45 mph, avg mpg = 28.5 since install about 3500 miles ago.
I will probably one do a couple of mods and this will be one of them. Intake and exhaust will be the next. I'm not looking for a 12 second HHR just a tad bit more power. I also want to see how others engines and transmissions hold up to the newly found HP and TQ.
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