Octane
08-24-2008 | 11:38 PM
#1
Thread Starter
Senior Member
Joined: 07-13-2008
Posts: 480
From: Buffalo, NY
Octane
if this has been answered somewhere, I'm sorry for the redundancy.
What Octane should I be running in my SS???
The engine is so noisy, I wouldn't notice knocking if it were on my head.
JIm
What Octane should I be running in my SS???
The engine is so noisy, I wouldn't notice knocking if it were on my head.
JIm
08-25-2008 | 07:03 AM
#2
Senior Member
Joined: 02-17-2008
Posts: 287
From: NJ
Min 91 is recommended fuel. I run 93 and my computer shows virtually no knock at all. The fact that it does detect even an occasional small amount at high load levels tells me that running 87/89 octane will drastically reduce performance and even fuel economy due to the spark being retarded during acceleration.
08-25-2008 | 09:33 AM
#4
Senior Member
Joined: 08-11-2008
Posts: 113
From: Michigan
Min 91 is recommended fuel. I run 93 and my computer shows virtually no knock at all. The fact that it does detect even an occasional small amount at high load levels tells me that running 87/89 octane will drastically reduce performance and even fuel economy due to the spark being retarded during acceleration.
08-25-2008 | 10:15 AM
#5
Senior Member
Joined: 03-31-2008
Posts: 772
From: CLEVELAND
I thinky snoopy tested this theory out over 4000 miles. Maybe 1-2 miles per gallon difference in mileage 87 vs 91 in the 2.4. I didn't notice any difference in normal driving with my SS running 87 vs 94. If it is a difference, it's small so I can't tell if it's octane or just my driving that specific day. I get 36mpg overall out of my SS running 87 btw.
As far as performance I have no Idea.
As far as performance I have no Idea.
08-25-2008 | 11:04 AM
#6
Senior Member
Joined: 02-17-2008
Posts: 287
From: NJ
Basically the software runs on your laptop and connects via a usb connection to a "black box interface" which plugs in to the cars data port.
08-25-2008 | 02:20 PM
#9
Senior Member
Joined: 08-11-2008
Posts: 113
From: Michigan
I have HP Tuner suite and it has the ability to monitor in real time and log up to 56 things at one time while the car is in use. You can then play back the run/trip in super slo-mo for detailed analysis or fast forward to get max levels of things. Still learning how to use it but it's pretty cool stuff. Bought a few books to help with the learning curve.
Basically the software runs on your laptop and connects via a usb connection to a "black box interface" which plugs in to the cars data port.
Basically the software runs on your laptop and connects via a usb connection to a "black box interface" which plugs in to the cars data port.
I've read about some of the interface chips that can automatically translate data from the on-board computer and just dump it out as Serial data. I've been thinking about using a micro-controller to get some of those stats and display ones I am interested in. Thing like the knock sensor detecting knocks would be extremely useful to know. If we see a lot then we can try using higher octane fuel, etc to see if it goes away. At the moment I'm not concerned with trying to install a new performance "tune" while the HHR is still under warranty but I would love to get access to all the other stats the computer has on board. That would be awesome.
08-25-2008 | 02:26 PM
#10
Senior Member
Joined: 03-31-2008
Posts: 772
From: CLEVELAND