As far as Vag com data...Since we don't have a GIAC stage 2 car just yet for us to test.. Pete and I decided to do some same night testing to just show what's going on inside car that we don't see with the vbox.
I would like to see what the GIAC car/pulley setup is gonna do. We are definitely gonna be doing much more testing with the vbox and test track runs as well as seeing what's going on via the vag com. Somehow I can't see peak 18 psi boost without a compensation i.e. lowering timing. At least based on Pete's logs. A whole lot of timing pull going on right now. You can contribute a little to "bad gas" but it's been logged a few times with similar results.
Here are is the session we did the other night.
APR stage 2+, Awe intake, Awe cat back exhaust
GIAC stage 1, new version just flashed, Injen Intake, Awe cat back exhaust.
Temps: ~40 degree F
Density Altitude -1400
Atm Pressure 1025 mbar (important when computing boost)
3rd gear pulls, same stretch of test strip road we always use. 0.0% decline/incline.
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Boost in Psi- very easy to see where pulley shines. I have hit 17.9-18.0 psi on some nights.
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Requested Boost vs Actual Boost-
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Mass Air flow- I peak at about 1475 kg/h or 410 g/s. GIAC peaked about 1378 kg/h or 383 g/s.
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Engine torque via vag com in Nm/or lb-ft (again can see where pulley makes biggest difference, see same on dyno sheet I posted below)
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Ignition Angle /Degrees (GIAC runs higher timing up top and this helps with higher speed rolls/runs)
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Timing pull (APR had very little timing pull going on.. in fact probably could benefit from some increased timing from my recent logs... GIAC car had a whole lot going on. Have seen that with a few data logging sessions we have done... some say its bad gas, I think it's a little of both)
APR logs
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GIAC logs
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Anyways... We have seen some acceleration data from my vbox thread that I have compiled with Auditude. Basically all three tunes are fairly even when it comes to 60-130 times with these cold temps (11.6-11.76 secs). Starting at lower speeds than 50-60 mph show that the APR stage 2 definitely has some advantage, at least in recent data collection.
http://www.audizine.com/forum/showth...box-list/page6
These vbox tests are very different from the quarter mile tests/list that is compiled up top and are a very different view of the tunes.
If you extrapolate from the vbox/pbox or whatever you want to call it-- the data for 60-130 the APR stage 2 car has a very slight advantage. This is clearly also seen when doing side by side pulls on our test track.
Any higher RPMs pull between the two cars is very close with the advantage going slightly to the APR car. Personally from what I can pull from the vbox data, and keeping shift times out of equation in the two manual cars... I think 3rd gear is more powerful in the APR stage 2 car and 4th is more powerful in the GIAC car. I have vag com'd, vboxed, dynoed... both cars. Argue what u want. The pulley is exceptional down low. Up top... the benefits are not so clear. IATs rise very quickly with my max achieved 17-18 psi of boost here at sea level/ -1400 DA nights...and timing hovering at around 16-17 degrees. Conservative.. yes. I prefer that. Virtually no timing pull in my car in these temps. Very Little. Log the GIAC car in same conditions.. and the timing pull is very different and very busy. Same goes for the REVO car. They are making their power moreso with timing (~19-20 degrees of timing advance (GIAC) and ~24-25 degrees of timing advance (REVO). 25 degrees is what I peak at when I am on Race gas. Revo runs this on pump.
Peak boost for both those cars (GIAC, Revo) is standard stage 1...low to mid 14 psi. I recorded those values when I was stage 1 also.
Now take a 40-130 with same lower rpm/gear start.. forget it...the APR car now has almost a 0.3 second advantage. It pulls ahead much quicker as 15 psi is seen very quickly. 30-130 is even worse.
The clear advantage of the APR pulley is down low. If we did a 15 mph pull in first gear.. you will clearly see the APR car pulling away early on. I really can't wait to see what the GIAC pulley does. Just as excited as Pete lol. I love this stuff.
REVO/GIAC stage 1 use their timing advantage and the APR Stage 2 car uses it's boost advantage. We are talking pump vs pump runs here. Up top, especially at cruising speeds... the benefits of timing outweigh the benefits of boost. This is at least how it is for us. Things get hot really quickly with high boost and without a CPS (me)..it might be costing me some hp. That'll be fixed soon though. I can't see the APR stage 1 setup keeping up with those two tunes though. We have a few fellas around here that are interested in logging and running vbox so we can see what's going on there also.
But back to our initial comparison and to further prove what we are seeing.. we did a back to back dyno session in the summer between the APR stage 2 car and the GIAC stage 1 car and you can see the exact same thing happening. I will leave peak dyno numbers out of it.. they mean squat. People get do obsessed with them and honestly for me have become the last thing i look at. But from dyno below... the pulley has ~10-15 whp advantage and ~15-20 wtq advantage up until ~4600 rpms. Then they are identical until redline. Would CPS help the top end? Sure. The curves definitely look off up top for both cars.
We will go and video the results one night and show you the 30 roll and 50 roll results. And stay tuned for a true stage 2 session.
On a side note..I have changed over to a Roc Euro intake from AWE intake/hacked airbox setup since our last sessions get-together and the data I have gathered from that will blow your mind. I was not a believer in the open element filter and this heat controversy and was fixated on the vag com data that showed how awesome my AWE setup was flowing.. but I did back to back intake testing that same night and the Roceuro gained a best of 0.39 secs from 30-120 mph when comparing it to the best AWE run and an average of about 0.2 secs when comparing the two. That is very impressive and I can't overlook that stat. Same stretch of road, 1 hr apart, same gear. The Roc hadn't fully adapted as each run was getting faster and faster and I ran out of time/laptop battery. I am still compiling more test results to get a better average but so far, Roc does ROCK.
i will be making another post about it soon.
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Originally Posted by blazeblunts4
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