Hey guys, does anyone happen to know how much timing our cars are supposed to be running at WOT? My only mod is a Halltech gen 2 intake. Sure seems like my car was pulling a LOT of timing during one of my runs yesterday at the drag strip?

 

Well my first pass on Tripleblk's dyno was showing 9 degrees of Knock Retard with a total advance at 17 degrees. This is with a Halltech installed with a couple hundred miles on it.

 

I just borrowed a friends wi-fi logger yesterday. It didn't show me KR but it looked like my pass was at 17-18 up until around 100 mph and then it dropped to 14. It was only at 10 at the 120 mph mark but that's right when it shifts into 5th. Thoughts.

 

Around 21 degrees at WOT is the norm.

Were you able to log your IATs?

 

I installed my Halltech (gen2 dry filter on A8) last week at aacorvette... , usually when I do a mod, I do a lot of road time afterwards to decide whether or not its something Im going to keep.

The gains where immediately noticeable, the car felt quite a bit stronger, and also quite a bit louder in track mode.

the first thing I noticed, prior to Halltech, I was able to get decent traction in 1st...post halltech, my tires just spin, so it requires a little more finness. So the 40-60hp gains were validated for me.

however, I did notice that sometimes in gear 3 and on, there may be a slight reduction of power. I remember that even if I was in gear 5 or 6 , I would be astounded at how much pickup it had even if I was way too high in the gears. Post halltech, sometimes those same 5/6 gear pull feel a tad slower, maybe.

Just to be clear, the halltech is awesome, and Im not 100% sure if what Im feeling is correct.

So I setup a time to have a dyno session at aacorvette to run different scenarios on the car, and check for kr and any sort of funny business in the timings.

If Andy says its good post test, than great, otherwise maybe the car needs a tune...

Maybe your experiencing the same thing? One thing I also noticed, is that the couple people who have been doing the quarter aren't gaining as much as one would think from those sort of gains... on the other hand the wheelspin could be a factor, really hard to say


Ill report my findings...

 

That's what I was afraid of. No wonder why my MPH's were so far off last weekend. I was only able to view the "dashboard" on this handheld device (Dash Command app for iPad). The spreadsheet is terrible even though I selected the PID's that I wanted to record. My best times at the track have consistently been with DA around 2000. I just wonder if I'm getting "too much" air when the DA has dipped into the single digits? My MPH always dips quite a bit under these "ideal conditions". Doesn't make any sense. As the day went on on Saturday and DA crept up to near 2000, I put up my best time and MPH. I cooled the car down the same on each pass and closely watched the temps, so that wasn't it.

 

I appreciate your reply, but wheel spin isn't the issue at the track. I consistently put up 1.62-1.64 60' times with my MT DR's.

 

I suggest getting a scan tool that can clear the adaptive tables. I wonder if hptuners or Efi live can do that. Hopefully someone can chime in who knows the answer.

 

Yeah, that's not a bad idea. I just don't want to do anything that GM might consider tampering with the stock computer and void my warranty.

 

It definitely seems like my car is "learning" this Halltech intake and over compensating for it now that it's been on for a while? I could be wrong but my times when I first installed the intake were phenomenal! Now that the conditions were ideal (zero DA), my times have gotten worse. Very disappointing, if I'm being honest. Certainly NOT disappointed with Halltech, just the fact that my car seems to be adjusting for it. And not in a good way at the track. The racing season is over already and now I get to guess at what the issues could be all winter.... Bummer.

 

I asked a buddy with a Tech 2 but he was not sure since he uses it on mostly Diesel engines. It is easy to do on the German cars with the factory scan tool and leaves no trace. Hopefully member (Triple6) not sure of the spelling will know the answer.

I hope there is an easy way other wise the only other factory quick way would be to re-flash a stock tune with the dealer tool which would suck.

Move down to South Florida our Racing season is just getting started with some cooler temps coming

 

Ask and you shall receive! This is my car on the dyno which was running at 200 degrees and pulling timing at WOT:

 

Thanks.

Dumb question, but what does the cylinder air mass represent on the left? I notice that the timing number continues to go down. This is what I was watching during my run as well.

 

Yes they can.

A Tech II will not work on the Z06. Beginning in 2014 GM is now using the GDS2/MDI platform which can be accessed through laptops/PC without a handheld scan tool.

 

So, what is needed to log my cars stats? I'm assuming that accessing it through a laptop will still be traceable with GM? What software is needed?

Thanks!

 

HP Tuners of EFI Live.

Both have scanning capability but as long as you don't modify the tune it won't raise any warranty red flags with GM. All GM is concerned about is whether you've ever written to the PCM and don't care how many times it's been read or scanned.

 

These GEN5 engines have an issue with what many of us believe is false knock. we did quite a bit of testing back in late 2013 and seemed like no matter what we did it still reported. You have to remember that knock sensors are microphones. Just be cause you show KR it doesn't always mean its detonation. Since the LS3 came out w have seen GM get very aggressive in the sensitivity of the knock controls. The E92 is still an interesting dissection.

FYI we have a thread going now on HPT site that you may be interested in following;

http://www.hptuners.com/forum/showth...Question-Knock

HT

 

Accessing the information on the databus is not traceable nor can GM stop you from doing that. You're not making any changes to the factory tune file. There is federal law on the matter and this is the reason there is the aftermarket industry. As stated you can download HPTuners or EFILive and pay for a license but I highly recommend you don't do that because you can change the factory tune with these. Unless you're looking to write your own tune files you don't need it. You're just needing a scan tool that can log and give tech level access for code and table resets so products like Autoenginuity if what you will want. https://www.autoenginuity.com/ If you do go with HP Tuners or EFI Live DO NOT CHANGE THE FACTORY TUNE. You're warranty will be gone bye see-ya.

 

This is interesting, if I have it right 1QUICK Z is saying what some other very knowledgeable people have been saying from the get-go about the aftermarket CAI(s). And why Halltech is eager to post those just installed and fresh off the dyno numbers.

You should be happy that the computer has the sensors and safeguards in place to protect your expensive engine from going "Kaboom". I know I am happy that the ECM/PCM is engineered that way.

New Slogan: "KNOCK SHOULD BE STOPPED".

 

Thanks for the info.