It depends on how you have 2 byte RPM set up. IF it is logging in the request ids that I am using for 2 byte airflow then probably not. Ihavent seen a need to log 2 byte rpm so I cant answer that question authoritively.

 

I need to find more info on the 2 byte airflow mod, my readings were 53XX-56xx, BUT, lbs per min, were maxed at 37.XX which is in line for stock IX turbo and whp was very close to uncorrected mustang dyno numbers, i was hitting 349is but tq seemed low, around 322 ish, and pq tq came at peak load on the graph, my 2 byte load was around 289, around 3300 rpm. Any suggestions for airflow mod, and this was very consistant run to run which i like alot. The evoscan HP/TQ calcs were all over the place.

 

Figured it out, when I changed over to NLTS rom I did not add the mods to the new file, works fine now.

 

Fastrob691, you made 349 based on airflow with this calculation versus the 331 in your sig? Has anything been significantly changed since that dyno as far as car setup or parts? Is the weather moderately different versus when you last dyno'd?

Trying to get a better judge of where I need to set the adjustment factor (obviously 9.15 might still be a little high) to get it more in line with a mustang and corrected values.

 

That was my pump gas number, the 372 I made on a mustang was a corrected number, uncorrected was mid 350, when I ran last night and logged I was running 100 octane and around 25.9 lbs of boost. I am still playing with my race gas tune. When I logged HP on stock boost, which I can only run 21lbs here with te 90 octane, it logged 329-330 which was right in line with the pump gas number. The humidity was fairly high last night compared with Tucson, I am working in NM till Nov and we have a river that runs through town. So I cant compare the weather to my dyno runs and I have changed a couple things since my last dyno run(hks, aps bov, and diff MIVEC map). So I am pretty happy with the accuracy being the conditions are so diff. When I make a run on pump and log it ill post the numbers, my tq is lower probably because I have the forge WGA which eliminated my boost spike that i had when stock, before I would spike 28 ish and taper way down, so that is different as well. I trap 113.09 on pump, and best of 116.25 on race, at 3600 feet, also to give yousomething to compare to.

 

Well uncorrected is based on the current ambient conditions so I am wondering if the temp was at least close if the humidity wasnt. If you logged 329-330 and were actually dyno'd at 331 then I think the correction factor of 9.15 is pretty close and we need to develop the peak power rpm detection now. I would like to see this low reading (like a Mustang) and conservative even if it is still only a tool for showing changes based on tune or mod additions. Thanks for your input and contributions.

 

John, that 300 whp number might be right. I did a log this weekend with my MAP sensor recalibrated, apparently I run about 22 psi at 6000 rpm

As for the calc for WTQ, it is probably correct, just that it should be shifted down the RPM curve because I think peak torque comes at around 3750-4000 for most people right?

 

Peak torque will occur at or near peak load because thats when full boost hits. Its almost always the lowest RPM peak torque will occur, but since you can load up the car differently and get more boost at different RPMs depending on driving style it makes it harder to be accurate.

I have been making pulls from lower RPM (2500) and then as soon as the car gets on it rowing the gears, then make a 3rd gear only pull from 2500 and seeing where the RPM and peak load seems to be at. This still is only a tool but the goal is to quantify changes made in the tune not to be 100% accurate on what the car is putting down to the ground.

 

Hey JB I am off tomorrow and wensday if you need me to do anymore stuff for you. Just let me know

 

I did a few more logs today working on my race fuel tune, spiking to hitting 29 lbs then tapering way down, and made a little more power on this run, 352 ish. What airflow does the stock ix turbo max out at? I was seeing 38.XXX lbs, with one run logging 39.xxx very shortly. But mostly 37.9-38.0 ish. Its a little cooler than the other day. When I log launching off two step I got a 363 hp spike in first right after hooking up, but then 2nd-4th were more constistant high 340-s to low 350s. The biggest thing is the consistancy between runs. Any other values I should look at as far as airflow in HZ, etc? If I can figure out how to zip a logfile i could send you some to look at.

 

I just checked my log again and saw much higher pk tq numbers on a 29 lb spike at 3875 rpm i logged 359.33 ft/lbs, at a 322.5 2 byte load. That run pk HP checked in at 354.496, 212.18 2 byte load, but at a high 7800 rpm right before the limiter. Airflow was 1865.673 hz, 38.74 lbs airflow, never below 300 hp from 4700 rpm. Does all this sound about right?

 

It sounds pretty close to what I just got done logging today on my friends 8 as well. Here is the log from his car:

http://spreadsheets.google.com/ccc?k...ZO_DQ&hl=en_US

The car is tuned by me, has custom ground 272's, a 4" car and 3" piping, Upper and lower pipes, 3" TBE with no cat, etc. It makes 26psi at peak torque with no to little knock. Now if you notice the airflow starts to taper around 6700 or so even though it shows power is still being made higher. My current theory (and it seems to hold) is peak power is actually where this taper starts to happen.

To answer your other question, the stock turbo is rated at 42# and it seems that stock turbos on pumpgas are pretty much good for 38-39 because of boost taper. The only car I have seen hold more has a custom cold air and it can hold 24 to redline on a stock turbo with a MBC. A car with a well tuned EBC might be able to come close but I am not sure on that.

JB

 

Here is my log. I think my power numbers seem a bit high. My mods are TBE, intake and tune on a Evo IX. Tell me what you guys think. http://spreadsheets.google.com/pub?k...kWWiLLVHvKJRRg

 

Black, you need to set it sharing "everyone"...well I couldnt look at it at least.

 

ok just changed it to share. try it now