Data logging charts (boost, timing, EGT)

[crash331]

I'm pretty satisfied with these numbers, and I think I might actually tune my car to be more agressive since the engine isn't pulling timing that bad. EGT is lower than I thought it would be and I'm running a little more boost that I expected.

2450mb = about 21lbs of boost.

But I'm definitely no expert, what do you guys think?

[Dietcoke]

Your tune shouldnt cause your ecu to pull any timing at all, period. That's the worst datalog chart I've ever seen. Looks like it was drawn in ms paint.

[crash331]

No offense dude, but you're retarded. The tune absolutely does make the car pull timing, and it happens with 100% of people with an ECU flash on my kind of car. Even the stock ECU pulls some timing if the knock sensor detects anything.

Proof:
http://www.mjbmotorsport.com/datalog.html
http://images35.fotki.com/v1127/phot...datalog-vi.jpg
http://i190.photobucket.com/albums/z...ber/Timing.jpg
http://www.revotechnik.com/products/...uide060406.pdf
Next time, research before you spew ignorance.

And no, it's not MS paint, it's called MS Excel.

[Dietcoke]

Yes, and if your tune is so balls-out that your engine is knocking, then you need to TAKE AWAY timing, not add. I've tuned close to 30 cars though HP Tuners pro, it's not a difficult thing, and the basic concept doesn't change car to car. Optimize AF, add timing until engine isn't happy anymore, then backoff a degree or two and fine tune from there. If you're getting any knock with a tune, then you need to address that. You have to also consider that dyno runs aren't going to run as lean as you will on the street, which is why I like to do road testing scanlogs as well as dynologs to find the power.

[crash331]

The car pulls timing when stock, but only about 1 degree instead of 3. It is not a problem and happens to every tuned GTI. The only concern is when it gets around 8 degrees.

I don't care how many cars you've tuned, you don't know what you are talking about in this situation. Maybe you need to read about the FSI engine (bet you havn't tuned one of those) or the Bosch ECU in the GTI. But I guess the hundreds of pages and documents scattered around the internet and the big tuners like APR and Revo Technik are all wrong, and you know exactly how a car that you've never worked with is supposed to run.

And maybe if you truly did know all you say about tuning, you would know that running boost causes detonation, so while the timing may be OK at 2400RPM, at 4000 RPM under 21lbs of boost, det is going to happen, so you retard the timing to account for the early explosion.

[Dietcoke]

Boost doesn't cause detonation by itself, there's tons of factors that can cause detonation. What's the point in adding timing if the ecu is just going to be a nanny and take it away? My car runs 23psi on pump without a hint of detonation at 12.5:1 afr. Direct injection ftw... oh and I have a bosch ecu in this car as well.

Once again, let me reiterate: If you have say, 28 degrees of timing advance and the ecu is pulling four, if you ADD two more, the ecu is only going to pull more. It's counterproductive. Knock retard recovery cycles are adjustable in the pcm, but even in a perfect scenario, it's not going to benefit you over having no excess knock/detonation in the first place.

Detonation is bad.