[toohighpsi]

Dave,

How much boost is it making? Did you log MAP with HP Tuners? Was this a tailpipe O2 reading?

You shouldn't be able to read boost off of the bypass reference line, there should only ever be vacuum on that line. Do they have the bypass connected to the boost side of the blower?!?

Something really off here, especially with a manual, is the car otherwise stock?

[TSloper]

This is not a solution to the issues at hand but if the WB sensor was at the tailpipe do yourself a favor and go overnight yourself an AEM WB sensor or similar and get the sensor in the proper place. You have a lot of $$$ invested in this and should not be tuning with some crappy tailpipe sensor.

[MA2010SS]

There are a lot of modifier tables to keep the engine safe and 161 degree iat in my tune I am pulling out 12 degrees of timing, and start pulling timing at 120 degree iat. I run meth and have a total of 16 degrees of advance with iat temps less than 120 degrees. Once you put the leaf blower on the heat exchanger the numbers went up, but you are running very rich also. Get a good tune, I am assuming that you are running a canned tune from edelbrock

[Daves1SS]

Originally Posted by toohighpsi

Dave,

How much boost is it making? Did you log MAP with HP Tuners? Was this a tailpipe O2 reading?

You shouldn't be able to read boost off of the bypass reference line, there should only ever be vacuum on that line. Do they have the bypass connected to the boost side of the blower?!?

Something really off here, especially with a manual, is the car otherwise stock?

Car is all stock save for a catch can, the Edelbrock E-force kit, and their canned tune. The dyno operator stuck his usual external WB 02 sensor in the tail pipe like he does with all the cars he puts on his dyno. Who knows how much boost it's making. I expected 6 psi but the numbers were all over the place. I didn't bring my laptop, as I truly didn't expect any issues like this to pop up seeing as how I sent Edelbrock numerous WOT street logs (full 3rd gear pulls) and they came back and said the tune looked good and no changes were needed. That coupled with the feedback from others such as Ed that the canned tune seemed spot on, had me confident that I would come away from the dyno pleased. That was not the case obviously. Edelbrock routes the bypass actuator vacuum line from the actuator around to the back of the blower on the driver's side. I'm going to copy and paste what they said to me below in an email today:

Once we receive the HP Tuner logs you mentioned we can give you a more direct answer as to what your issue may be. At this point we can only make assumptions. We can start off by saying don’t worry about teeing into the bypass actuator hose causing any issues or false readings. All our MAP readings are being taken at the same location when we dyno vehicles in house. Your low power numbers are more than likely due to a combination of high IAT’s and catalyst over temp protection. We had an almost identical issue with another 2016 Camaro MT that was being used for a television show. Ideally you would want to start a pull with the IAT’s at 100-110F and exceeding no more than 125-130F at the end for optimal power. As for your tailpipe AFR reading being in the mid 10’s it would only make sense that the IAT’s was initiating the cat over temp causing your rich condition. We always take pre-catalyst readings during R&D testing but we have had numerous customers report to us that mid 12’s are common tailpipe readings for these DI LT1 vehicles. Once you can provide us with the data logs we will be able to shed some more light on your issue.

The guy that logged the second and third runs with his HP Tuners said he sent me the email with the logs, but I never got it. I think he is going to try again tonight. Surely he measured MAP but we didn't discuss what his laptop said on the MAP, as we were just really taken aback at the bouncing numbers that T'ing into that vac line gave us. I also don't understand Edelbrock's response saying that was ok and not addressing why the boost numbers seemed all over the place. But again, once I get my eyes on Jeff's HP Tuners scan, it should tell us a lot.

[Daves1SS]

Originally Posted by TSloper

This is not a solution to the issues at hand but if the WB sensor was at the tailpipe do yourself a favor and go overnight yourself an AEM WB sensor or similar and get the sensor in the proper place. You have a lot of $$$ invested in this and should not be tuning with some crappy tailpipe sensor.

I have plans to do this soon, trust me. Also, I'm running the canned Edelbrock tune with their powertrain warranty. No tuning being done by me. I just wanted to see how it dyno'd that's all.

[Daves1SS]

Originally Posted by Atomic Ed

Maybe it's my inexperience showing on dyno runs, but those AFR curves look suspect to me.

Have you messed around with your SCT unit much? If you haven't done it already, go to SCT's site and download the LiveLink Gen-ll software and do your own measurements. Or, I also use Torque Pro for Android with a USB connector in the OBD port.

I think it would be a good idea to confirm the numbers yourself. When you get your friend's data, you'll then have a three way comparison.

Hang in there Dave. The bright side is your about to pick up an additional 50- 75 rwhp soon!

Ed, yes I did numerous street scans about a month and a half ago with the LiveLink software. I have plans to do more once I get my friends HP Tuners logs and can sort through them, and can know how to proceed in scanning myself again. I also am going to buy a wideband and plumb it just north of the cats.
Bad timing as funds are tight right now, but it sounds like it's needed now.

[aka Reckless]

Yeah that is way lean at tip in

[laynlo15]

Really, 3rd gear pulls. I think you should be pulling in at least 4th and probably 5th gear. I think 6th gear would be too much mph.

[Daves1SS]

Originally Posted by laynlo15

Really, 3rd gear pulls. I think you should be pulling in at least 4th and probably 5th gear. I think 6th gear would be too much mph.

On the street, I cannot do full 4th gear pulls out of safety concerns and the streets I have to test on. The dyno pulls were done in 4th gear though.

[laynlo15]

I just read the post 3rd gear pulls.

[yonson]

Originally Posted by Daves1SS

So as a side note, on the way to the dyno, I had been driving very aggressively next to a new corvette on the interstate. Perhaps it stored a high catalytic temperature from those sprints regardless of the fact that the car had cooled for 3 hours+ prior to the pulls......

Still waiting on the guy that scanned my car to email me the logs before sending to Edelbrock. He didn't send them last night like he said.

Here are the dyno charts:

[IMG]http://img.photobucket.com/albums/v347/DavesGTP/2016%20Camaro%20SS%20supercharged/Dyno1_zpsokvrhqay.jpg[/IG]


[IMG]http://img.photobucket.com/albums/v347/DavesGTP/2016%20Camaro%20SS%20supercharged/Dyno2_zpslcqx6c7i.jpg[/IG]

Yeah, that looks like it's heat soaked. Ours looked identical to yours on the first run (510/460) We let it sit a couple hours with fans on it and it made 3 runs back to back and averaged 540/520 on 91 octane.

[yonson]

Originally Posted by 2SS_in_GA

Yeah that is way lean at tip in

That looks like it's because of a couple different things, tail pipe sniffer for one and it looks like they rolled into the throttle instead of flooring it.

[Daves1SS]

Originally Posted by yonson

Yeah, that looks like it's heat soaked. Ours looked identical to yours on the first run (510/460) We let it sit a couple hours with fans on it and it made 3 runs back to back and averaged 540/520 on 91 octane.

Same kit and tune? Thank you very much for this info.
Makes me feel better.

[Daves1SS]

Originally Posted by yonson

That looks like it's because of a couple different things, tail pipe sniffer for one and it looks like they rolled into the throttle instead of flooring it.

This is true. He rolled into it instead of jabbing the gas down.