Power upgrades for the HHR
04-19-2007, 03:42 PM
#1
New Member
Thread Starter
Join Date: 04-19-2007
Location: KS
Posts: 23
Power upgrades for the HHR
I recently purchased a HHR with the manual and have been researching power options for it. I would like to do a STS turbo conversion or any other turbo/ supercharger systems but saw that there seems to be a problim trying to calibrate the engine managment software. I also have seen that there are several ideas out there for what best upgrades to provide the most power for the HHR. I was wondering if anyone has evidence that thiers it the best with dyno results. Also a list list parts used and cost of them to evaluate thier price to performance.
04-19-2007, 04:11 PM
#3
Senior Member
Join Date: 04-30-2006
Location: Maryland Heights, MO
Posts: 9,149
Welcome!!
At this point there are no turbos for the 2.4 wich have proven to be able to be tuned right.
I have done no dynos so I don't know how much my opinion/experience will count for you.
I have installed the CGS intake; considerable difference, company estimates 8hp gain, I'd say that's about right. $200+
I have a custom exhaust, Thrush muffler split to two Walker resonators/dual tip side pipes. Breathes much better, and noticible power gain. Better sound also. $800+.
ECM/PCM tune by Tune Time, a supporting vendor here. MAJOR difference!! Changed shift points, fuel mix set for 93 octane, changed rev limiter, etc.....$350 in a group buy.
The tune really made the biggest difference. of course by them I'd already done the other mods. I do have some things planned for the future but don't think I'll see anything that will make as much a gain as what i've gotten until someone breaks the code for a turbo.
Another member claims to have a module which added 50hp to a stock 2.4. Who knows...said it was a prototype that they are running for the company that is sponsoring them. Won't disclose who it is though. I have my doubts, but can't say one way or another.
At this point there are no turbos for the 2.4 wich have proven to be able to be tuned right.
I have done no dynos so I don't know how much my opinion/experience will count for you.
I have installed the CGS intake; considerable difference, company estimates 8hp gain, I'd say that's about right. $200+
I have a custom exhaust, Thrush muffler split to two Walker resonators/dual tip side pipes. Breathes much better, and noticible power gain. Better sound also. $800+.
ECM/PCM tune by Tune Time, a supporting vendor here. MAJOR difference!! Changed shift points, fuel mix set for 93 octane, changed rev limiter, etc.....$350 in a group buy.
The tune really made the biggest difference. of course by them I'd already done the other mods. I do have some things planned for the future but don't think I'll see anything that will make as much a gain as what i've gotten until someone breaks the code for a turbo.
Another member claims to have a module which added 50hp to a stock 2.4. Who knows...said it was a prototype that they are running for the company that is sponsoring them. Won't disclose who it is though. I have my doubts, but can't say one way or another.
to the site!!!
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