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Mods
EC v7 header tune (been on the car for a weeks)
weistec catless headers
straight pipes to mufflers
row boxes w/afe filters
Results (Uncorrected)
headers run 1 - 461whp/421wtq
headers run 2 - 462whp/426wtq
Results (Standard Correction)
headers run 1 - 470whp/429wtq
headers run 2 - 472whp/435wtq
Compared to my best previous non-header standard correction runs: +21whp +9wtq
Seems to be in the same ballpark as other header cars but maybe a tad low for a v7 headers car? Not really sure. I know the car feels quicker now then without the headers thats for sure. But like most people, figured those numbers would be higher. But again, its only numbers.
Only issue I had was after the first run. Maybe not an issue but I think dyno operator error. The operator told me the air/fuel was super lean. So I looked at his computer and noticed the a/f was basically steady from 2000-7000rpm right at 14.7 (see graph). Didnt make sense to me so I told the guy your sensor must be bad because its reading stoich. He assured me it was a new sensor and we tried a second run. Same thing happened on the second run. I had my head in the engine bay listening for knock but the car sounded smooth. I would think if the car was running that lean in the high 14's in the upper rpms it would be pinging like crazy, pulling timing and the graph line would be choppy. Well he assured me his equipment was good and he seemed nervous about doing any more pulls so that was that.
Last mod to come is the flex fuel kit. Still aiming for that 500.
I was going to ask for a Torque (Android app) log but tbfh even I've lost faith in that thing because I find that you only get one half-decent data set in every 15 or 20 pulls.
A solid data log can tell a lot about the state of tune and how the car is working with it.
The one thing that I still haven't concluded is how much the VVT element to the tune actually affects the motor because I don't have enough V7 logs. I guess a lot of it also comes down to the physical state of the car (camgears, o2 sensors, maf, vacuum leaks which seem more common than you think etc)
However....if you can get a Torque log over to me, I'd love to have a look and let you know my thoughts if you want to know them
I was going to ask for a Torque (Android app) log but tbfh even I've lost faith in that thing because I find that you only get one half-decent data set in every 15 or 20 pulls.
A solid data log can tell a lot about the state of tune and how the car is working with it.
The one thing that I still haven't concluded is how much the VVT element to the tune actually affects the motor because I don't have enough V7 logs. I guess a lot of it also comes down to the physical state of the car (camgears, o2 sensors, maf, vacuum leaks which seem more common than you think etc)
However....if you can get a Torque log over to me, I'd love to have a look and let you know my thoughts if you want to know them
I actually have the torque pro app but haven't used it in a long time. I remember there being an option to change the interval time that the app would monitor the pids. Going as low as 2 second intervals but Im sure it would skip a lot.
I know theres a decent amount of power left of the table (15-20whp) with these off the shelf tunes. I'm pissed I couldn't see the air fuel with these runs but just looking at the graph tells me after 6200 is probably low 12s or high 11s. The graph looks the same as the previous graph before the headers were installed.
Once I get the e85 kit I have to get this car dialed in correctly so I'll setup a remote tuning session with eurocharged and the dyno near me
Nice...I'll try reducing the interval time on mine, i'll bet that's why it's been hit and miss. I've also had people send me logs with mish-mash data, but this interval thing seems to be a plausible reason.
If you can get a log of a nice WOT pull from like....4000-redline in 3rd gear, I'd really appreciate it.
I stand corrected. The real time graphing option gives intervals down to 50 milliseconds....if it actually works and records data that fast remains to be seen
08-24-2017, 12:41 PM
