Stock GTI Boost Logs

[h100vw]

Thanks guys.

I guess ill have to try to get ME7 logger working next weekend to log actual vs requested. Any tips anyone?

If that fails ill try unplugging the N75 and see what I get.

Can you feel this while driving it? Or are you just chasing it since you logged it?

ME7 logger needs a definition file to work. I have that created. Have you been through nefmoto's idiots guide.

[Slow_Polo]

I can definitely feel the power dropping off higher up in the revs, but don't really know if that's how a Polo is supposed to drive. It kind of feels like there is no point revving past 5k, better off to change up a gear early.

Like I said my experience is with turbo Hondas which get crazier the higher you rev. But with the little stock turbo on the Polo, there's no way it will be like that.

I'm mostly just making sure everything is running right before I start modding it. Plus I'd like some logs before each mod to see some changes.

I got my Seat cooler a few days ago so really am just playing around with logging ATM to do some before and after comparisons of IAT.

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[Slow_Polo]

I read a guide on Audizine about ME7 and getting started.

If you could email me the ECU bin file that would be awesome! I probably won't get a chance to actually play with the Polo untill next weekend but could look at the file throughout the week.

Getting the bin file seems the only part I didn't quite understand from the guide. I wasn't sure how to get the nefmoto flasher working properly.

I think I have ME7 GUI working properly on my laptop but haven't pluged it all in yet to my ECU.

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[seangti]

If you get stuck with ME7, let me know and I'll try help you out. I can only help of a night. Worse case I can zip my folder and send the whole lot to you to you save some stuffing about.

Re the boost, the previous Superchip tune on my daily peaked at 14psi but was like 7psi at 6k rpm. I think the latest tune holds more boost longer, but that was configured for the car in its current state (e.g. TIP, FMIC, Intake), not just an "off the shelf" stage 1 tune. In isolation, your boost pressures don't show an issue, but as Gavin said, best to not look at data in such isolation.


Also, the feeling that you might as well shift at 5k rather than stretch to 6+ is spot one, even once tuned. The turbo/engine combination makes such strong lower and mid range torque there is little point revving beyond about 5700rpm in pretty much every gear. For the 3rd to 4th shift, anything over about 4500rpm in 3rd gives near identical acceleration to running 4th. I've mapped/logged this with a 10hz lap timer GPS. You can probably do the same mapping with your torque app, use g-force, log g's in every gear, than overlay against each other.

[h100vw]

I can definitely feel the power dropping off higher up in the revs, but don't really know if that's how a Polo is supposed to drive. It kind of feels like there is no point revving past 5k, better off to change up a gear early.

Like I said my experience is with turbo Hondas which get crazier the higher you rev. But with the little stock turbo on the Polo, there's no way it will be like that.

I'm mostly just making sure everything is running right before I start modding it. Plus I'd like some logs before each mod to see some changes.

I got my Seat cooler a few days ago so really am just playing around with logging ATM to do some before and after comparisons of IAT.

Sent from my XT1068 using Tapatalk

The turbo Honda must be all aftermarket with a turbo picked for top end.

The Polo is a 200 hp car putting out 150hp. Just vastly different things.

Even with my set up I don't rev it out, it makes very little difference to the rate of acceleration, as long as you are over 3500 revs in any gear.

I personally doubt there's anything amiss with yours.

Gavin

[Slow_Polo]

Sounds good guys.

It sounds like its normal but I'll still try to get some logging done before I go to stage 2.

I'm getting a quote for a dump today, so hopefully I can have it all running before Xmas on stage 2.

Luke



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[Slow_Polo]

Just to finish this thread off, I did some more logging tonight with ME7 thanks to some help from Sean.



So it looks like everything is normal and running like it should.

ME7 logger is actually quite easy to use once you get it all figured out.

Thanks for your help guys.

Luke

[sambb]

awesome resolution with me7 compared to vcds graphs. The actual boost really goes off a cliff at 5100rpm doesnt it.

[seangti]

Excellent to see and hear it all worked for you Luke. I assume you logged in 3rd gear?

Sam, the sample rate of ME7 is much more powerful (20x second) than VCDS (just over 1 per second), plus can log all properties in one run, rather then only 3 properties at a time.

Luke, what was your Mass Air Flow reading, column X typically? Find the max figure (just do an =max(...) equation), then divide by 0.8. That's a loose hp figure. At a guess, I'd be expecting something around the 140-150 hp peak. By comparison, the stage 3 polo's logged and measured as above are around 230-240hp. I can't recall what my daily polo, tune only is... would have to check when I get home. Obviously this is engine horsepower, not at the wheels.

For boost in PSI, say column AC (Boost pressure desired), the maths is =(AC24-1000)*0.145 to get PSI. 1000 is barometric pressure, 0.145 being that 14.5psi equals 1 bar of pressure.

Data, so much data

[Slow_Polo]

It was only in 2nd unfortunately, nowhere long and straight enough for a 3rd gear pull close to me

The MAF formula is interesting, but my log got corrupted when I moved the ME7 folder and I can't view it now, but I will be going some good logs on the weekend and have the perfect place to get some nice consistent runs in so will have a whole heap of data to look at.

I was making my graphs in excel, but got ECUxPlot working and it is amazing! So much easier than excel.