[ZTUNER]

Here is the Dyno Log for The Cobb Tune + FMIC. in a single gear everything looks wonderful

[ZTUNER]

Originally Posted by Rysandro

Is pure water injection a possibility with our N54's? I've read on these forums that water does better at keeping temps down. And with the new "meth" system from shiv stalling shouldn't be an issue even with pure water?

I'm a complete noob with meth/water/whatever injection. I've PM'd Shiv twice on the subject of pure water injection with his new "meth" kit, but he's completely ignored me on the subject.

This is my opinion, yours might be different so don't beat me up for saying this....

I believe meth / water on a DD is too much work, even with all the failsafes and cool addons that are available. On a racecar its acceptable but keep in mind a lot of drag strips frown on meth injection due to the safety issue. Some tuners claim meth is safe if you add some water to it but infact you have to dilute it significantly to make it truly safe. I also believe having any meth mixture close to a high heat source like the turbos is asking for trouble. The new solution from Vishnu uses the factory washer bottle which IMO is too close to the turbos. A correctly designed meth system needs to have either hardlines or high pressure braided hose. All the plastic hose kits are ridiculous IMO. I could go on but i think i make my point clear already.

Harry

[Proper Motion LLC]

Originally Posted by ZTUNER

This is my opinion, yours might be different so don't beat me up for saying this....

I believe meth / water on a DD is too much work, even with all the failsafes and cool addons that are available. On a racecar its acceptable but keep in mind a lot of drag strips frown on meth injection due to the safety issue. Some tuners claim meth is safe if you add some water to it but infact you have to dilute it significantly to make it truly safe. I also believe having any meth mixture close to a high heat source like the turbos is asking for trouble. The new solution from Vishnu uses the factory washer bottle which IMO is too close to the turbos. A correctly designed meth system needs to have either hardlines or high pressure braided hose. All the plastic hose kits are ridiculous IMO. I could go on but i think i make my point clear already.

Harry

I agree with all this, which is why I ask if using pure water instead of meth/water blend is possible and safer? Do new precautions need to be taken for pure water? Shiv mentioned that with his new "meth" system, you can go 50/50 mix and the car will no longer stall. But one of my questions is can you go 100% water without having the car stalling with the new injection system?

Also water has been said to do a better job at keeping IAT's down vs Meth, and it's not like running Meth is going to raise your octane rating when you are already running 104 octane gas. So than wouldn't the better combination when going all out in a race be Pure Water Injection and 104 octane gas?

[boom]

You can do pure water but your nozzle will need to be much smaller to keep from quenching the combustion. I was bogging on a D07 nozzle with a 50/50 mix.

[Proper Motion LLC]

Originally Posted by boom

You can do pure water but your nozzle will need to be much smaller to keep from quenching the combustion. I was bogging on a D07 nozzle with a 50/50 mix.

Cool, and perhaps place the nozzle a little closer to the intercooler?

Wish I could see some testing and results

[Clap135]

Tune is way to hot for your mods Harry. Maybe get in touch with Lance to see if he can drop timing

[ZTUNER]

Originally Posted by Clap135

Tune is way to hot for your mods Harry. Maybe get in touch with Lance to see if he can drop timing

I might have to. Is this the same tune they supply everyone.

Harry

[acdHQK713K]

Originally Posted by Clap135

Tune is way to hot for your mods Harry. Maybe get in touch with Lance to see if he can drop timing

Is there a specific reason or mod that explains why your tune is working a bit better than Harry's?

[Clap135]

Originally Posted by crewkip

Is specific reason or mod that explains why your tune is working a bit better than Harry's?

Imo cobb made this stage 1 tune a bit aggressive, they look fine on the dyno, but like i said multiple times, dyno logs are useless, you need to log longer pulls on the street to find out how the tune is really performing.

As for me, fully bolted and in temps that are in the 20s-50s cause its winter. I have meth, but its not on and hasnt been on since I got cobb since its simply a waste cause it wont raise ignition as the base maps are drastically lowered.

[Clap135]

Originally Posted by ZTUNER

I might have to. Is this the same tune they supply everyone.

Harry

Yea, maybe bump down to the 91 octane map? Give it a shot, I mean it will be a little slower, but it sure as hell won't drop timing in 4th that much if any at all.

[Gunzaro]

Anyone know if it is a good idea to reset ECU, transmission etc adaptations via a BT tool after a flash install like a Procede for example?

[ZTUNER]

Originally Posted by Clap135

Yea, maybe bump down to the 91 octane map? Give it a shot, I mean it will be a little slower, but it sure as hell won't drop timing in 4th that much if any at all.

Good idea, i forgot about that tune. I'll load it up and try to log it on the street to see how it does.

Harry

[ZTUNER]

Originally Posted by Gunzaro

Anyone know if it is a good idea to reset ECU, transmission etc adaptations via a BT tool after a flash install like a Procede for example?

Cobb has a built in function that allows reseting adaptations.

Harry

[Gunzaro]

Have you tried it yet -any difference?

[BrianMN]

I've got question about the timing dropouts/knock events from the above logs...

Is it the same 3-degree bump-downs the factory ECU calls for? Has that been changed at all with the AP?

[ZTUNER]

Originally Posted by BrianMN

I've got question about the timing dropouts/knock events from the above logs...

Is it the same 3-degree bump-downs the factory ECU calls for? Has that been changed at all with the AP?

Don't know the answer to that unless we can log requested timing. Currently only have access to actual timing.

Harry

[Clap135]

Cobb also mentioned they monitor all 6 cylinders. So when either knocks you can see timing drop on the logged cylinder. Not too sure how it works yet but its something along those lines.

[ZTUNER]

So here are some more logs on the 91 oct tune on the street. I did not pull it all the way thu 4th but i tried to do a 0 thru 115mph pull more or less due to space / cop constraints. 1st run i think car was too cool. Have the temp graph and then the AF, Timing Boost graph. Boost is significantly lower but the car does not feel that much slower so maybe this a good map for me.

Run one is in the first 2 graphs, Run three is in the next 2 graphs. Temps are warmer in run 3. Notice the FMIC does not get as hot as it does at the track.

[Imperator]

Originally Posted by Clap135

Cobb also mentioned they monitor all 6 cylinders. So when either knocks you can see timing drop on the logged cylinder. Not too sure how it works yet but its something along those lines.

We don't see KR on the AP live monitors or in the datalogs yet but I know that's a feature they were working on adding for a future firmware release.

[ZTUNER]

Originally Posted by Imperator

We don't see KR on the AP live monitors or in the datalogs yet but I know that's a feature they were working on adding for a future firmware release.

That would be very cool , no guessing then. Also need to see the effect of AIT compensation if that exists. I am sure they have some compensation based on all temps.

Harry

[mithiral67]

Still trying to educate myself on reading these logs. So, if you see a 3 degree drop in the Timing CA () value during WOT it indicates a knock event?

[Imperator]

I'd like to see the additional links or DME logic behind the timing tables. There's gotta be more information on how advance is adjusted based on IAT and/or KR. I'm also curious if the DME stores additional timing tables, should a low-octane table exist when sustained KR is triggered.