My log

[ZenkaiRacerDsM]

I did it in 3rd gear. What do you think it looks like? Am I getting a little knock?

This was with a 14b at 14psi, intake, ic pipes, bov, 3in dp. Yes its a stock fuel system.

I did it to see where it was at at 14psi. I was going to up it to 16psi and compare. But if its knocking already then I wont.

I forgot to mention my intercooler is full of oil from the previous turbo that I have yet to clean out.

 

[turbolarry]

I did it in 3rd gear. What do you think it looks like? Am I getting a little knock?

This was with a 14b at 14psi, intake, ic pipes, bov, 3in dp. Yes its a stock fuel system.

I did it to see where it was at at 14psi. I was going to up it to 16psi and compare. But if its knocking already then I wont.

I forgot to mention my intercooler is full of oil from the previous turbo that I have yet to clean out.

Yea, your knocking. Based on the timing pull from 17 degrees to 14 degrees your knocking above 6000 RPM's. Leave the boost where it's at and try cleaning out the IC. See if it helps.

 

[ZenkaiRacerDsM]

I cleaned my intercooler... it was dripping with oil inside. Hopefully it does something.

 

[hellotbone]

Let us know thats a nasty log not much advance at redline on the timing really. I would think you should be banging 20 anways thats what my car turned with the 14b.

 

[ZenkaiRacerDsM]

Ok I just pulled another log now that the intercooler is clean. What do you think?

 

[ludevtec93]

that's a pretty dam good log to me.. i say try it at 16psi and see how it goes

 

[16g-95gsx]

You are on a stock fuel system with zero correction right? Try something for me. If you are on the peak airflow curve on a 2g, you should reach a peak of around 16* of timing if you have zero fuel corrections. Seeing as you reach around 20*, this tells me that you are actually running on a lower airflow curve. Try actually adding boost, go to around 16psi or so, and see what timing peaks at. If you do in fact have 0 fuel corrections and are running on the stock fuel system, you should see your timing hit 16* around 6000rpms and never drop any lower, just flatline. If it drops below 16* at 6000rpms you are knocking, if its higher, then you arent on the peak timing map, meaning you need to flow more air. Again this is all assuming you are on the stock fuel system, aka stock 450's with zero fuel adjustments from a piggyback system.

 

[ZenkaiRacerDsM]

Really? Cool. Yep my fuel system is completely stock. Ill up it and see how it goes.

 

[16g-95gsx]

Yea, also be sure not to rev that high, 6500 is all id ever take it to, the 14b just simply wont keep up in those ranges, therefore your airflow will also be lower, and you're more likely to run on a lower timing map (high timing degrees).

The lower the airflow you flow, the leaner the ECU makes airflow, and the higher the ECU makes timing. On the highest airflow curve, 2.1g/rev the ECU gives a peak of 16* of timing on 2g's, and aim's for around 9.5:1 according to the dsmlink guys. If you are on stock injectors, it will be the exact same for you since you are a 2g. Meaning that if you see above 16*, you arent flowing enough air to place you in the peak timing and fuel map, meaning you're leaner, and also higher timing. More boost with less timing makes more power, so dont feel hesitant to run 16psi if your logs correspond to what Ive said. A 14b flows at most 29lb/min or so generally, and the stock fuel pump on a 2g will keep up with that fine. If you rewire your stock fuel pump, it will keep up with any fueling demands the 14b will demand, without hesitation. In rewired form it will support over 30lb/min with ease. On stock wiring, on the stock fuel map, it will support 26lb/min or so at 15psi of boost, before it starts to run out of breath. This is assuming 9.5:1 AF, which is what your factory ECU will try to give you if it has its way. Id say rewire it just t be on the safe side as its cheap and being the stock fuel pump it wont overrun your FPR, and itll assure the fuel pump wont run out of steam for you. Your injectors however, at 85% duty cycle it will only support 24lb/min, or 28.63lb/min at 100% IDC, assuming 9.5:1 AF. At 16psi you should be safe, and your injectors shouldnt max out, however under higher boost your injectors will start to max out if your AF isnt leaned out slightly over stock.

I just listed that to help you judge where you stand in your fueling, and to help you tune to your peak on your current setup. I say rewire the fuel pump, and also get a new catback and testpipe. For now try what I had mentioned earlier with turning the boost up and seeing how your timing reacts. Its likely you'll notice your timing lower, and your O2's actually increase slightly under the higher boost. Good luck

 

[ZenkaiRacerDsM]

Thanks man. Thats some good info. I have a 255lph fuel pump I was thinking about putting in to aid with more boost. But looks like I wont need it at all right now. Ill definetly rewire the pump. Thanks again.

 

[16g-95gsx]

No problem, just trying to help ya out. Being that you're on the factory fuel setup makes things nice and easy to work with. An issue you may run into shortly down the road unfortunately will be fuel cut, which to continue the ability to completely control fuel and timing, will force you to use either a keydiver chip or run DSMlink. Like I said though, turn it up and see how she does, and dont bother revving past 6500 as your turbo wont be flowing well past there anyway, not enough at least to make it worth it.

 

[hellotbone]

Your second log looks great and is right on the money. Nicely Tuned.

 

[16g-95gsx]

The second log looks decent, however does show some knock in the topend.

 

[ZenkaiRacerDsM]

Ok heres another one with like 1-2 psi increase. Thing is though it drops back to 14. My wastegate is being a real biatch. I just now got it to stop spiking but still havent gotten the boost where I want it. I also rewired my fuel pump.

Timing still goes to 20... Ill have to mess with it and get that boost where I want it.

 

[OverboostXS]

Correct me if i am wrong but I thought PSI has nothing to do with airflow so adding boost really would mean he hasnt changed airflow and wont meet maximum "PEAK" of the fuel map anyways. Reference http://home.comcast.net/~tarryo/kyle/articles/flowpress.html