What did you do to your Polo today?

[sambb]

yeah I know. I'm so excited by my find that I'm daring to dream.


edit: just went for a quick drive. squeaking gone, knocking still there. semi -bugger!. Starting to think that its the FARB droplinks.

[louis19]

Finally finished my TIP and intake so it all sits correctly. Pretty happy with the outcome

[seangti]

I've decided to retune my daily polo, so going from Superchips to a vagautowerks tune. The tuner, Daz Dillenger is well respected in Audi scene. My car has ran superchips for ~5yrs, 50,000km and I've been really happy with it, it's really smooth, good power, perhaps a little thirsty (so I thought). Though in my ignorance I'd never logged the car till recently having learned more about logging and fuel trims since doing the red polo.

My fuel trims show the car as being very lean with a +17% multi fuel trim in VCDS. So I logged the car with ME7 logger and found that it was fueling (AFR) at very high 13's until 5000rpm before getting rich to a more reasonable level. Very strange but consistent with the requested fueling. All other parameters within the Superchip tune are very safe. I'm not quite sure of the fault, I'm speculating but thinking that the Superchip tune (and guessing many others) are written for an entirely stock polo, tune only, and that by adding air intake &/or TIP it's leaned out it significantly. I'd be keen to hear thoughts on this.

Irrespective, now that I know the AFR's are lean, I couldn't ignore it even though it's ran like a dream for 5yrs...

Which leads me to a second consideration, how many ppl are logging their cars regularly after changing/tweaking things to see how that affects the tuning?? I'm guessing very few. If you've been tweaking, I'd be logging it.


(shout out for ME7 logger, it's free and so powerful, a much better logging device than VCDS, which isn't a logger, but a diagnostic tool).

[nat225]

could it be the intake that caused the fuel trim issue?

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[seangti]

could it be the intake that caused the fuel trim issue?

Sent from my GT-I9506 using Tapatalk

Yeah, that's what Daz suggested too. It's a standard PD160 (near identical to the factory one, just marginally larger), still has the rock guard/flapper in the intake and standard airbox with a paper air filter. He suggested putting the standard intake on and trying again. I'll try find the std intake and re-log out of curiosity, though I have no idea if I kept it as I did that 4+yrs ago.

[sambb]

My turd non genuine vag cable won't let me look at fuel trims other than the +\- O2 sensor reading on group 001 of vag. So what I always do is check for timing pull and throttle plate cut in vag com and check fuelling with hardware up the tail pipe. You're right you find interesting things. For example a 3rd gear pull for me may show no timing pull but some throttle cut to 98%, but logging an actual simulated hillclimb through all gears over say 1min may show up patches of timing pull after gear changes but zero throttle cut. Don't just log on a flat runway, log how you normally drive. Really who mashes the throttle at 1800rpm in third. That alone can,t be used to represent all that goes on inside that engine.

[seangti]

My turd non genuine vag cable won't let me look at fuel trims other than the +\- O2 sensor reading on group 001 of vag. So what I always do is check for timing pull and throttle plate cut in vag com and check fuelling with hardware up the tail pipe. You're right you find interesting things. For example a 3rd gear pull for me may show no timing pull but some throttle cut to 98%, but logging an actual simulated hillclimb through all gears over say 1min may show up patches of timing pull after gear changes but zero throttle cut. Don't just log on a flat runway, log how you normally drive. Really who mashes the throttle at 1800rpm in third. That alone can,t be used to represent all that goes on inside that engine.

That issue re fuel trims isn't the cable, it's because you're on the shareware version of vcds. Buy the Lite version and it'll become available, or get ME7 Logger and a huge amount more data.

Yeah I hear what you're saying about the full throttle runs, given your input is throttle percentage, WOT is relatively easy to tune for, it's everything in between that creates the challenge for tuners.

[rgvlee]

Took the pogo to the track friday afternoon
Hammered the **** out of it!
Highlights included reeling in everything except for a targa wrx sti
Remsa, dba t2s and rbf600 held up well, no brake fade

Will need new tyres before collie trackday in oct, if I can pick up a reasonably priced spare set of 17s I'll look into a decent track tyre for the 16s
Also looking into buying a schroth quick fit 4 point harness, I think this will make a big difference as I couldn't stay planted in the seat

[seangti]

Also looking into buying a schroth quick fit 4 point harness, I think this will make a big difference as I couldn't stay planted in the seat

I'm yet to be convinced that a harness on a standard seat can be done safely. It's either all or nothing and the lap sash has proven to be the next best thing to a full harness. On the Schroth setup, there's risk of spinal compression, the rear of the seat collapsing, etc. Certainly run a HANS if you try this approach - not running a HANS with a harness would be much more dangerous during an impact. A fellow died at lakeside about 2yrs ago from a low speed impact, wearing a harness but not HANS and the impact severed his spinal cord in his neck. Lap sash he would have been ok/injured, but not dead.

I have a GC Lock - CG-Lock Performance Add-on for your Seat belt. It works sufficiently, though I think better for a larger framed person as I'm quite skinny, my hips sit back in the seat nicely but it doesn't help much for upper body. I think I have a spare one I could sell you. I bought 4 at the time and one mate pulled out.

[rgvlee]

A HANS would be optimal and I will look into it. The pro supports it.
I'm going to check out a racing seat as well.

Of course the more you invest the more you are likely to get a better result when it goes tits up.
I think the risk is low for what I am doing, the tracks that I am racing at and the budget that I have to apply.
Harnesses have been used for a long time before anyone was thinking about HANS devices.
I would imagine most guys, just like myself, just use a motorcycle helmet for trackdays as well which isn't optimal. Yet it's allowed and we still do it.

In the lakeside example the guy hit an earth embankment.