Header?
11-11-2009, 08:36 AM
#11
Senior Member
Join Date: 07-13-2009
Location: NC
Posts: 414
Thank you for the correction JoeR
Guys, Listen to JoeR! In fact, the fellow I was talking to has a 2.2 liter. It makes sense that it would show an improvement on his 2.2 liter. Looks like I didn't ask enough questions at the time. My apologies for the wrong information.
JoeR, would the Vibrant header show much, or any, improvement on a stock engine and exhaust?
Many thanks for the correction. It sure beats "learning by the school of hard knocks". God Bless, Marc
JoeR, would the Vibrant header show much, or any, improvement on a stock engine and exhaust?
Many thanks for the correction. It sure beats "learning by the school of hard knocks". God Bless, Marc
11-11-2009, 10:39 AM
#12
Senior Member
Join Date: 10-02-2005
Location: VA
Posts: 1,245
We tested the Vibrant on a friend's highly modified LSJ Cobalt (322 HP) against the stock manifold and the JBP (piece of crap that lost a LOT of power!). On his we got a 8 HP gain over stock.
I've got the Vibrant on my SC'd HHR. Felt better, but did some other things about the same time, so I don't have data on that alone, but would expect a realistic 6 - 8 HP on a basically stock 2.4.
I've got the Vibrant on my SC'd HHR. Felt better, but did some other things about the same time, so I don't have data on that alone, but would expect a realistic 6 - 8 HP on a basically stock 2.4.
11-11-2009, 12:00 PM
#14
Senior Member
Join Date: 10-02-2005
Location: VA
Posts: 1,245
Marc, the Vibrant is only available as a header and downpipe combo, with the header to downpipe flange being different and in a different location.
It will bolt up directly to the OEM or aftermarket catback, though.
In all honesty, for the best gains in power, response and gas mileage, I would recommend a good tune over attempting to get those gains via header, intake or both.
I've said it a bunch of times, but will repeat: The OEM intake is, in my opinion and others, an ugly thing! But, it is NOT restrictive, so don't expect ANY gains there! (BTW, our resident journalist wannabe that "tested" the K&N got that minor gain not from the intake, but the errors it created in the tune, something that nobody caught. The factory tune is set to a 12.5 AFR under PE. He admitted a 13.7 AFR. WAY too lean that could cause engine damage and the cat, too.
The OEM exhaust is better than many think. That cast manifold flows better than many believe. I previously had a Megan prototype header on mine, similar to the other "shorty" ones mentioned. Gain, if you want to call it that was only about 2 HP, which is in the normal realm of dyno error. The OEM muffler is very free flowing, not restrictive as many have falsely claimed. Look in my gallery for a pic of the OEM muffler cut open.
Again, for anyone looking for realistic gains on a basically stock motor, just go for a good tune. You'll get more for your buck there.
If you want real power, supercharge or turbo it. BTW, Mike, you got awful quiet about your Hahn turbo setup. What happened there?
It will bolt up directly to the OEM or aftermarket catback, though.
In all honesty, for the best gains in power, response and gas mileage, I would recommend a good tune over attempting to get those gains via header, intake or both.
I've said it a bunch of times, but will repeat: The OEM intake is, in my opinion and others, an ugly thing! But, it is NOT restrictive, so don't expect ANY gains there! (BTW, our resident journalist wannabe that "tested" the K&N got that minor gain not from the intake, but the errors it created in the tune, something that nobody caught. The factory tune is set to a 12.5 AFR under PE. He admitted a 13.7 AFR. WAY too lean that could cause engine damage and the cat, too.
The OEM exhaust is better than many think. That cast manifold flows better than many believe. I previously had a Megan prototype header on mine, similar to the other "shorty" ones mentioned. Gain, if you want to call it that was only about 2 HP, which is in the normal realm of dyno error. The OEM muffler is very free flowing, not restrictive as many have falsely claimed. Look in my gallery for a pic of the OEM muffler cut open.
Again, for anyone looking for realistic gains on a basically stock motor, just go for a good tune. You'll get more for your buck there.
If you want real power, supercharge or turbo it. BTW, Mike, you got awful quiet about your Hahn turbo setup. What happened there?
11-18-2009, 09:00 AM
#18
Senior Member
Join Date: 06-27-2006
Location: Kingsville On
Posts: 732
Been running this for 18 months works better than after market headers.
https://www.chevyhhr.net/forums/2-2l-performance-tech-5/how-build-your-own-header-save-%24300-bucks-15656/
https://www.chevyhhr.net/forums/2-2l-performance-tech-5/how-build-your-own-header-save-%24300-bucks-15656/
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