Topic: Share your HP Tuners logs

[kennysabarese]

It was really hot that day. I am gunna log today again and see how it goes. I did have the AC on right before that pull which could cause higher intake temps.

There is a Dejon IC for sale on the BB, considering it if it's a goo deal.

[Kelu]

Load: 295% 
5500rpm and 255 kPa  and dropping off pretty slowly after
More than 35 lbs airflow and
Nice matching EQ Ratio vs lambda
Still some some knock  which ruins you advance
IAT: 126 F  big no no

[kennysabarese]

I guess I need an IC or some water meth or both.

[tazz]

Here's mine Shabby did some tweaks.
Thanks
Not pushing as much as kenny but still alright for me.

[kennysabarese]

Shabby, I have a question. It seems to me that the best power is made just on the limit of knock. The computer, even with stock tune, will attempt to get more aggressive timing until it senses knock then backs down. So by limiting your timing to never have any KR, you could be actually sacrificing some power....

Do you agree, at least theoretically?

[tazz]

Im no expert hear but I would think it would depend on how much initially the ECM is backing down the timing to prevent KR.  If the ECM is pulling 1.5* of timing and would be fine with .5* of timing then it's actually hurting you making the most power.  Not sure on how fast the ECM can adjust the timing and exactly what margin it may use to get in the zone of no KR.  From what Im reading on HP tuners it looks like dialing in your MAF tuning will allow you to run a more advanced timing curve this allowing for more power. 

[shabby]

The ecm runs whatever timing is in the timing table, it doesn't add any additional timing, and i never noticed any extra timing in any of my logs. There's only 2 additional tables in hptuners(im sure there's more hidden) where it'll add/take away timing based on intake temps and coolant temps.

[kennysabarese]

I'm not saying that it goes beyond what is in the table. But say you put in 87 octane fuel, there's no way for the computer to know the octane of the fuel it is spraying so it has to try the timing in the table. But it's going to knock, sense the KR and adjust timing down, but it's going to always try to get back to what is in the table because you may have filled up your tank with 93 octane fuel. Right?

So you are saying that it will use the IAT sensors and coolant temp to guess the timing, then fine tune that with the knock sensors?

[shabby]

I'm not saying that it goes beyond what is in the table. But say you put in 87 octane fuel, there's no way for the computer to know the octane of the fuel it is spraying so it has to try the timing in the table. But it's going to knock, sense the KR and adjust timing down, but it's going to always try to get back to what is in the table because you may have filled up your tank with 93 octane fuel. Right?

That sounds about right, unless the ecm has some way of determining the octane in the tank somehow and switches to some lower octane correction tables just like it does with iat/coolant. There's really not enough info on how the ecm does all this though, there's only a handful of timing related tables in hptuners. Plus i never run anything lower than 94 octane so i don't know how the ecm reacts to lower octane fuel.

So you are saying that it will use the IAT sensors and coolant temp to guess the timing, then fine tune that with the knock sensors?

There's really no fine tuning the ecm does, if there's lots of knock it simply pulls timing, if there isn't it runs whatever timing is in the tables plus it uses correction tables to add/subtract timing based on iat/coolant and probably a whole bunch of other sensors/inputs that we don't know about.

[Graywolf]

Great idea to share logs!! Just got hp tuners pro suite and have not connected it up yet. !st  I plan to copy my current setting for BSR tune with gmpp sensors and then try to find the best hp tuner in the midwest to tune my car and copy there setting. Any suggestions for who is a great tuner in the midwest?   Also I ran 100 octane Sunoco and saw no improvement and after several hard laps my car started over heating up to 230 degrees with no loss in performance. Ron Davis racing radiator ordered.

[kennysabarese]

There's really no fine tuning the ecm does, if there's lots of knock it simply pulls timing, if there isn't it runs whatever timing is in the tables plus it uses correction tables to add/subtract timing based on iat/coolant and probably a whole bunch of other sensors/inputs that we don't know about.

Yea fine tuning isn't the right term. I meant that it corrects if there is knock detected, kinda like how the MAF tells the computer how much air is coming in so it can adjust the fuel mixture, but if the O2 sensor shows something unexpected coming out the other end, it will adjust the AFR. That's all I meant...

Saw those correction tables in HPT. I wonder how fast they can kick in. People discussing using water meth seem to be worried that if the meth stops flowing, the temps will go up, but if the computer sees it, they should not be worried.

[shabby]

Its instantaneous, the correction tables are added before the final timing number is calculated. Now assuming the ecm uses the iat2 sensor in the ic pipe for its calculations then the meth has to be sprayed before that sensor and it doesn't look like people are doing that from the install pics that i've seen, so that table wont do them much good.

[kennysabarese]

Exactly!

I just did some reading to and it looks to me like the IAT not only only affects the timing, but also will help determine the AFR since the computer needs to know the density of air, and density can only be found if it knows the pressure and temp of the air.

So it would seem to me that if you spray water/meth before the IAT2 sensor you shouldn't have to change the AFR or timing, the computer would just take care of it.

[NormSky]

Don't have 2.23 beta on my phone but GM cars in the past blended coolant and intake temps. NA guys would reblend to bias toward intake temperatures. This would eliminate the cool ambient increase in performance we see on cool days.

[jinks]

Hi there, I have an '06 deep with a Hahn stage II and the stage III on the way, I live in Utah at about 4500ft. is HP tuners the way to go to fine tune my tune? Thanks, Mike

[Gentleman Jack]

jinks,

welcome to the forum!  I don't know the answer to your question, but Kenny, Kelu or one of the other HPT geniuses here will be able to give you great direction!

Gentleman Jack

[Kelu]

Hi there, I have an '06 deep with a Hahn stage II and the stage III on the way, I live in Utah at about 4500ft. is HP tuners the way to go to fine tune my tune? Thanks, Mike

I'm not familiar to turbo LE5s and especially with Hahn stages.

HPTuners is pretty much the only way if you want to fine tune your ecm.
The other solution would be Trifecta but you can't tune it yourself.

Lately a new method raised, buy a Trifecta "base" tune with changes in some areas where HPT is still undecoded and fine tune on top with HPT. But this is offered only through a limited number of Trifecta dealers afaik.
This applies to LNF, not 100% sure works on LE5 too.

If I remember corectly Westers have some experience in tuning turbo LE5 (I hope I'm not wrong) I would ask Lyndon too. Working with Westers means reading/writing/logging is accomplished using HPT.