So let me give everyone the full story. Bought the car a year ago, and it obviously had some mods on it. A few months after buying it the engine went boom and literally sprayed oil on my windshield. So I have now spent around 15 grand rebuilding the motor. Had it rebuilt buy MAPerformance and it now has all the parts listed in my sig. My issue is I feel like it does not have the power it should. I have everything I need to tune and log the car and have on an ongoing basis been adjusting the tune a little here and there to first of all get rid of knock, which seems to be impossible because no matter what I do it seems to always want to knock even if its just a little. And since it is knocking I am afraid to increase boost or timing to get more power out of it. If someone could take a look at a few of my logs and my tune it would be much appreciated. Let me know what I am doing wrong. According to VD I am getting somewhere around 315 to 335 HP on 93 octane at 25 pounds boost. Thanks for any help that can be givin.

 

You need to get that to a good pro tuner (with a set of det cans) on a dyno.

Your timing table is way, way more retarded than I would have expected. * Your boost target points at load 280 @ 4500rpm, but at that point you'd be running with just two degrees timing advance.

Wow,your "Calibration Fuel Map" and "High Octane Fuel Map" have both been revised quite a bit.


I do get where you're coming from, not wanting to advance timing due to knocksum activity... hence the very first suggestion.

Rich


* I'm not a pro tuner, I don't have a dyno, and I don't have a set of det cans.

 

You should be hitting 400hp/350tq easily on that setup. Your timing map is way too conservative and your Mivec maps are switched around (low temp timing maps should be copied over to normal temp map). Your fuel maps are all over the place as well. It could be rich knocking, or it could be knocking from too little timing as well, or both. Also with a built engine you most likely will have to adjust the knock filters since it will most likely be a little more noisy than a stock engine.

Have you done a compression test on it lately as well?

~Chris@MooreAutomotive
Tuner/Master Technician

 

So I think I am getting closer, my MIVEC and timing maps have been updated and I am getting a lot more power now, around 400whp, but still seeing some knock above 5500 rpm. Wondering if this amount of knock is ok or do I need to adjust my timing a little to get rid of it? Attached are logs and my maps. Also, I have been told I should not have to adjust my knock filters because my motor was built by MAPerformance and they are very good with making sure all clearances are to spec so it should not be much more noisy then a stock motor.

 

You're heading in the right direction. Timing and Mivec needs to be smoothed out more, it's a little blocky, and mid-range timing should be increased. Large timing jumps in boost can produce knock as well. Your afr's are pretty good, might want to richen up a little at peak boost.
I think those last logs are the wrong ones though, they still only show 9 deg of timing up top and VD only showed low 300 hp.

~Chris@MooreAutomotive
Tuner/Master Technician

 

As the thread that describes them sates - don't touch the knock filters unless you know what you are doing!

That said - any built engine will be at least a little noisier than stock. The materials they are made out of do not expand and contract at the same rate as stock materials which were chosen for a reason. Clearances to stock spec does not really apply for a built motor, and still wouldn't necessarily mean the engine would sound the same to the knock filter. There is a different weight to parts and everything interacts just a little different.

I very much encourage self-tuning... but maybe after 15k and a blown motor a pro tuner should at least get you in the right direction? You have to start to learn somewhere. There is no black magic, but there is a lot to learn.