Add a supercharger or turbo to chevy hhr
#3
#4
A few Threads on it, there are more do a Search.
https://www.chevyhhr.net/forums/2-4l-performance-tech-14/supercharged-hhr-35495/
https://www.chevyhhr.net/forums/2-4l-performance-tech-14/injection-nice-but-35607/
And a Link to a KIT. (cheaper to put together your own "kit")
http://shop.zzperformance.com/store/...arger-Kit.aspx
https://www.chevyhhr.net/forums/2-4l-performance-tech-14/supercharged-hhr-35495/
https://www.chevyhhr.net/forums/2-4l-performance-tech-14/injection-nice-but-35607/
And a Link to a KIT. (cheaper to put together your own "kit")
http://shop.zzperformance.com/store/...arger-Kit.aspx
#9
As long as the boost is kept at a moderate level ~8psi and a good tune it should still be a reliable build. Almost double hp is getting to the point of engine failure. Most people with 2.2l stop @ ~200whp for reliabilities sake.