Procharger Stage 2 Installed, Tuning Questions

[diablomatt]

One thing a dyno gives you that data logging does not is and actual power/ torque figure so you know if the change you made is better or worst.

The logs you are posting seem to have lean spikes on tip in. This is a transient fueling issue. Could cause it to be prone to knock. Also 15* of knock advance is excessive.

the knock is always after it has already transitioned and is in power enrich. and 15 is peanuts. hell procharger runs more than that

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[Jay-rod427]

I think he meant 15 knock retard, not timing advance.

 

[markmurfie]

That's 15 of knock advance that I was seeing not final timing but what the ecu is adding. Look in the part throttle areas. On tip in that's not what you want the timing to be doing.

 

[Tommy V]

Knock advance????If the ecu is adding timing i think its spark advance.

 

[markmurfie]

Ecu adding timing from not sensing knock.

 

[Tommy V]

Ok got what your saying now,but u think 15 degrees is excessive?Mine runs 18 on 93,or maybe im not just understanding what your getting at,not being sarcastic in any way.

 

[markmurfie]

Yes you may be running 18 saftot. Spark advance final total. But your ecu is not at -18 for knock retard/advanced.

 

[diablomatt]

Yes you may be running 18 saftot. Spark advance final total. But your ecu is not at -18 for knock retard/advanced.

oh i misunderstood. FYI the diablo tool records the knock amount in 2X the actual number. so 16 in the datalog is really 8 degrees being pulled. assuming he posted the diablo log. i honeslty didnt look as i have them in my email. but yes we are on the same page now

 

[diablomatt]

oh and -number is ADDING timing. and +number is removing. not sure how it in on the n gauge

 

[3beeps]

oh and -number is ADDING timing. and +number is removing. not sure how it in on the n gauge

Same on the nGauge.

 

[diablomatt]

what a differance!!! and there you have it folks. everything tighend up and not rattling now. ;)

 

[ramairgt1]

What was loose?

 

[diablomatt]

What was loose?

you would have to ask purpra. i THINK it was the tensioner. im seeing more and and more that the belt isnt tight enough and the tensioner is bouncing and causing knock because its only a few inches from the sensor. but it might have been the exhaust too. i was just showing the difference. no tuning changes made

 

[Davepurp]

What a difference! Now I just have to get back on the dyno to see what it can really do.

As for the false knock I would also say it was the tensioner, but I did tighten everything I could down including the exhaust clamps fuel rails catch can etc. I didn't really tighten anything too much either but as it shows it doesn't have to be a lot to make a huge difference

 

[markmurfie]

Nice. Always good to see a problem fixed.

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