Here's a clip of the HHR in action.:twothumbs:

And my girlfriend forgetting that she is also being recorded:lol:

http://www.youtube.com/watch?v=fnn11_Ie6r4

Nope, not as long as your 78# valve springs don't float the valves..

Still using the stock 54# springs. I'm upgrading to 78# so I can rev that regularly, just waiting until I am ready to do the cams.

I re-read it.. You're not experiencing any valve float @ 7,200 rpms?

Nice. :bow: :twothumbs:




:skull:

Not that I could tell. Power was still good all the way to fuel cut. But thats where the dyno would really come in handy b/c then it'd be obvious. I gave 7200 a go for a short while since I found many people getting into the 7400 range.

Agreed.. & Cool build !!! I know CJ digs his on his 2.2

sounds sooooh sweet, nice :D

Just wanted to give you guys a quick update on the psi this kit is making so you have good information. It turns out my MAP sensor was faulty for a while and finally crapped out on me. After I installed my boost gauge a couple weeks ago, I noticed it was reading 9psi and my MAP was logging up to 12.5 in HP Tuners, but it was sporadic. I replaced it and it has been consistent with my boost gauge at 9psi. This makes a lot more sense to me as well considering the kit was supposed to make about 11psi with the stock exhaust, but with a free flowing exhaust my boost is 9psi with the 3.1" pulley.

Luv the sound of a Supercharger.:twothumbs:

Bad azz mod , Sounds wicked ! :twothumbs:

:batman:

Sounds great! Love the sound of a blower...makes me think about doing it to mine. I might be able to sell the wife on it to. She had a nasty super coupe when we met and wants something boosed again :)

You want to Race?..... If you Insist, at that Price I Can't Resist. That's Right.

Tonight it ain't right, I got to have me a wink, But, I'll be back for You jack and i'll let the Machine speak. That's Right.......

http://www.youtube.com/watch?v=-ZclVGqCWws

Showdown, you bet. And I haven't even saddled my pony yet... :lol:


Now on the day I was born... The nurses all gathered around, and they gazed in wide wonder at the joy they had found. The Head nurse spoke up, said, leave this one Alone. She could tell right away, That I was Bad To The Bone......:skull:

http://www.youtube.com/watch?v=IyhJ69mD7xI

Swwwweeeeetnessssss ! 2 epic songs :twothumbs:

:batman:

Cammed!
 

Hey guys I got around to the cams and springs I was talking about a little earlier than I thought. I ordered the ZZP 2.4l cam regrinds. Comp does the regrinds for them. I also got their 78# springs and retainers. Some pics:

https://www.chevyhhr.net/gallery/fil...5/IMG_0314.JPG

https://www.chevyhhr.net/gallery/fil...5/IMG_0324.JPG

Intake cam installed. Half way done.

https://www.chevyhhr.net/gallery/fil...5/IMG_0327.JPG

Spring compressor. The Kent-Moore tool is awesome.

http://zzperformance.com/cobalt_ion/...1279&catid=230

From the pics you can see I have been having a ton of fun with this dang HHR :lol:. This was my first spring and cam install and it took about 6 hours. The exhaust note is really good too. Throughout a bit deeper tone. Tuning and a few shorter drives have shown the fuel economy to only be down roughly 3% for dd. But that is not the impressive part. This thing has gobs of power up high now(right where I spend a lot of time :thumb:). The power band moved up about 500rpms, but the valve springs are allowing me to rev 7200rpm with no issue. I am really impressed with the power at about 4000rpm+. With the stock cams I had good punch at about 3k, but it would flatten out a bit around 6k+. I suspect it could have been a bit of valve float, but it seemed like more of a plateau than loss of hp. The new cams have great power at 4k+. This thing just hammers all the way to 7200 and now I am strongly considering balance shaft removal to spin higher because the power just doesn't feel like its falling off. I am also considering spending a couple bucks to throw it on a dyno even though I said I didn't want to :wink: just to make sure of this. I am going to try and get to the track sometime in the next month. I have never even been to one so I hope it'll be a kewl experience. :twothumbs:

looks awesome :twothumbs:

Nice addition Jason.:thumb:

Your gonna have some local SS owners scratching their heads as you blast by . :lol:



:skull:

understatements of the year

Very sweet work there HHRFreek take it easy on those tires.:lol:

He still has tires? :lol:

What is being used to add fuel for boost? What did you use for tuning?

With HP Tuners you can customize the PCM parameters so your stock PCM still controls all the of functionality within its limits.

excellent pics of the cam install :twothumbs:, and a bad ass supercharger setup too. let me know how the neutral balance shaft install goes, i'm plannin on adding cams and balance shafts whenever i get some spare cash, or time.

I thought HPTuners couldn't read 06 PCMs....

I'll try tonight!

HPTuners supported vehicle list:

06-10 2.4l HHR are writable

http://www.hptuners.com/products/vcmsuite_vehicles.php

Currently the 2.2l are not writable, but I thought I read somewhere they were working on it. Not 100%

Oh. Never mind. They did get support to the 2.2l Cobalt 07+ model years, but not the HHR. If somebody put in a request they may consider working on it since the PCM is the same. The 05-06 2.2l would not be doable though.

For the 2.2 HHRs, '06 - '07 had the E16a ECM which HPTuners has chosen not to support.

The '06 and '07 2.4 used the E67 ECM which is supported.

From '08 and up both the 2.2 and 2.4 share the same E37 ECM which is supported. Error on HPTuners list.

Hope this clears this up and doesn't confuse anyone.

Also, for some of you "newer" people here.... (hhrfreek, you said you didn't see any S/C threads!)

To my knowledge, the first to S/C an HHR was a member named Quasimotor, back in late '07. I helped him with tuning issues and became a friend. Unfortunately, he (Jim Davis) took his life at the end of '09. He was a cool guy!

I did mine three years ago. No issues and still running strong.

As for tuning, I bought HPTuners as my Christmas present in '06. Had to do some work with the developer and finally was successful in Jan. '07, the first HHR tuned with HPT!

hhrfreek.... some info for you.... I saw where you mentioned the program available to tune the virtual VE tables. ktoonsez, the developer, early on told me that it would not work with our VVT, since the computational formulas go from a 5 to a 7 dimensional polynomial equation for the computations.

When I first tuned mine, I saw some strange behavior when going into boost and decided to go with pure MAF for airflow calculations (this was before that program was even available.) Absolutely no issues!

Recently I looked into the MAP zones in our tune and got an idea, which I haven't had the time to look into. Go to the HPT forum repository and grab a Corvette ZR1 file. It uses the same E67 ECM. Look at the zone mapping. I see a 'hint" there!

Joe. I know you had a SC HHR way back. I'm not the first or the last person that will do this. Your posts came up periodically when I was thinking about SCing the HHR. I still haven't come across a solid informational thread on this on this forum, but rather a bunch of talk about "thinking about it" or you saying you've "been there done that". And that's fine I am only trying to contribute to a cool project and I am happy to see the interest it has sparked again. I just didn't come across any project threads like this one. I also sent you a pm back in fall of '10 asking for some tuning help with my HHR because you did it already, but I never got a response. I think I have a pretty good grasp on the tuning aspect of this though and likely in the same manner you learned it. Trial and error and the help from others. And that's how I came across the EQ program. I tried it this spring and ended up wasting a crap load of time and banged my head trying to understand the inconsistencies I was getting from it. That little bit of info would have been great to know. Turns out the first time I used it I loaded the same tune that was on my car with back on with other minor adjustments I was working on. Thats why I thought it was working. Yeah silly mistake, but oh well. I am also running a MAF tune, but only after 3200rpms. I have a bunch of free time Sunday so I am going to give the full MAF tune a try. With the tune I got from ZZP the SD tables were already altered so I left them and just continued tuning other aspects within the PCM. I'm going to check out the ZR1 file in a bit. Thanks, Jason.

Waiting dude! :D


:thumb:


:lol:


:skull:

Ha! OK.:lol: If the weather cooperates when I'm off I will. Right now I am putting a little money into the suspension. Starting with the rear springs, shocks and a sway bar. A supercharger and the FE1 suspension just doesn't jive.:thumb:

Can't wait for the cammed video :twothumbs: Also i'm wondering what kind of exhaust setup you're running. i just swapped my exhaust, and it sounds horrible :skull1:

I am running the Cobalt addiction header($200), ZZP 3" downpipe($200), and a ss magnaflow muffler($80 online coupons at Advance makes things really cheap sometimes). I realize its not a full exhaust but I call it that cause its close enough. I just don't want to cough up the money for a cat back and end up having $800+ tied up into the exhaust when there are other things that I want right now. I got rid of the major restrictions anyway. Besides, I really like the way it sounds and I have gotten a few compliments on it. It sounds good with the stock resonator and mf muffler. Its pretty mellow until I am above 3500 then it gets pretty loud, but not loud enough to drown that whine:thumb: I originally purchased the catted downpipe option, but gutted it this spring cause I thought it was rattling. Turns out it wasn't and now I have no cat:lol: It was the heat shield.

This is the drive by vid from before(prior to cams) and this is the exact setup: header, catless dp, stock resonator, magnaflow muffler.

http://www.youtube.com/watch?v=fnn11_Ie6r4

Thanks man :twothumbs: On my 2.2L, i'm rockin the cobalt header, ZZP downpipe, and a ( FREE ) stock HHRSS cat-back with the resonator upped to a 3" dia. resonator. It sounded great with a 2.4L header & downpipe, and the SS cat-back, but when i got the new exhaust put on it sounded like pure rice :skull1: After crawling under and investigating, i found out why. Major exhaust leak... the downpipe and cat-back are bolted together by a 2-bolt flange, which is blowing out the bottom side of the flanges. I gotta change it out to a 3-bolt flange setup. Anyways, your ride sounds great, cant wait to hear the cams, also, any gains with the gutted cat? performance or sound?

The gutted cat changed the tone a lot. It added a subtle raspy note at certain rpms when your idling down. The lower rpm note is really good(>3k) with a sweet throaty sound. Performance gain was minimal, so don't do it for that, but the tone is good. I think at that point the biggest restriction is the stock muffler. I liked the sound of my exhaust with the stock muffler and gutted downpipe the most, but the muffler was a major restriction under boost. The stock muffler is pretty restricting with our higher flowing headers and downpipes.

Sure sounds like a lot of fun! I wonder if I could put that together without my wife finding out? LOL I suspect that she would not be happy with me having another toy. Nice job putting that all together!

No good vid yet. I have a leak in my exhaust. I checked everywhere. I think its the flex in the downpipe. Hopefully I can teach myself how to weld when I get a welder next month so I don't have to buy another. I did however hit the track for the first time...and I have poor results though I am not embarrassed to post them considering my issues. I am in the midst of resolving them over the next few weeks and hopefully have a good showing next time.:crossfingers:

I did 5 runs and achieved a best of 15.1 @95.5:thumbsdow

Problems(more than a few):

Driver. My best reaction time was .65. My slowest competitor was .23. I was told by a few that I should be hitting it on the 2nd to last light so I am just moving as I hit go light. Also, holy crap, the traction is wild.:lol: Of the 5 runs I did, I almost stalled 3 times. I normally drop the clutch on the street(slight slip to save the drive-train) at ~2500rpm and the wheels spin instantly. So I was intending on doing this at the track, no dice, more rpm. So I should fair much better next time.

Wheel hop. I was going round and round and my engine got hot! I know this because of two things rear trans mount that I made out of poly a few months ago started to melt from the heat off the downpipe!:lol: The wheel hop got so bad after the 3rd run I was babying it in 1st. I thought I broke a traction bar and the next morning I noticed my mount was fried and it oozed out(I'll post pics when I take it out). I ordered new ones and will actually have them tomorrow...I hope they fit(I'll let you know). The other is my thermostat went bad. I noticed on the drive home that my coolant temp was dropping on the highway and wouldn't go above 170. Popped out the stat and noticed the rubber seal deteriorated.:lol:

3rd gear. I expected this to happen actually. My best runs at 95mph were bouncing the rev limiter @ 7200 for 2 sec. If I tried to shift 4th I was 2mph slower.

The best part of the night was watching the sickest Nissan GTR ever! It ran 8.9 @ 169mph and multiple low 9 sec runs:thumb:


I have some more plans in the works as well:

Cooling mods: Dual pass, Phenolic Spacer(both ZZP products), also either a heat shield of some sort or exhaust wrap.

Neutral shafts: I want to rev 7800(that would top out 3rd at ~103) so I'm going to give it a whirl.

Larger TB(LS4 upgrade): This has gotten some mixed review from many of the cobalt guys that do it, but I've got one and I think I can tune it with a revised intake as well.

All right. Phenolic spacer and dual pass is on the way. As well as a new TMAP sensor and harness so I can monitor the IAT2. The ZZP kit only allows you to read IAT. I have been tuning off IAT and got some flak about it from some members on the cobalt forum since IAT2 is all that really matters, but I did not know about this and I will resolve this issue. I also got my LS4 throttle body. It is ginormous. I will show a comparison pic when I am ready to install it next week with the cooling mods listed above.

Here is a pic of my rear custom transmission mount. It was stock rubber mount and I filled the rest in with polyurethane (3m Window Weld). I thought this stuff would be better with the heat. It dries hard like rubber. Needless to say it did not like the mostly unshielded heat from the downpipe and round and round at the track.

https://www.chevyhhr.net/gallery/fil...5/IMG_0584.JPG


It worked fairly well for a long time, but is nothing compared to the TTR mounts I put in:

https://www.chevyhhr.net/gallery/fil...5/IMG_0587.JPG


Also here is the thermostat that also decided to go on track night:

https://www.chevyhhr.net/gallery/fil...5/IMG_0563.JPG

Love this thread!!! I need to Stick this is my HHR!!! = )