Zach. yes. argue with me. that is a brilliant idea.

i look at it like this. you are trying to jump into this game way to fast and do not have enough knowledge of what happens behind the scenes to fully understand it all.

made from scratch? really? hmmm. why is it they look an awfully lot like mine from over a year ago? why is it a customer of yours flat out told me that you used an lnf base of mine?

 

You have never given me a tune??? The lnf base tune that I am using is the other bryans, maybe he got them confused, I don't know the lnf's nearly as well as I do the lsj's hence why I was using that as something to get started. As far as my tunes go I have never even seen a tune from you, even though I would like to. I don't really see a problem with me going around and tuning peoples cars if they are happy with what I am giving them. I make sure there car is safe and not pushed right to the edge, give them a proper afr, make sure there not running to much timing etc, and they have always been happy. It's not like I am charging them an arm and a leg and telling them they will win every race. I'm really not trying to argue with you, but I don't see any harm/foul in tuning peoples cars??

 

i personally do not give a **** what you do. what i do care about is feeding people information that you do not fully understand.

as far as files from 06black. the chain of information runs a lot deeper that you know.

there is a reason why i sit back and watch and say something when the time is right.

 

One thing that I have never seen discussed on this forum regarding timing is MBT timing (minimum best torque timing).

The majority of LSJ make peak tq around 5200-5500 rpms. Yet I have seen some "custom" tunes that increase timing after that point.

How do you properly ramp the timing table to avoid knock due to jumps in timing and still be able to run 22, 23 degrees?

 

I haven't told anyone that I have your tunes, the only tune I have from anyone is a base tvs file from tom, a tune from 06black for the lnf and thats it. If you want to talk about this more via pm let me know, I really don't have any of your tunes, I wish I did though lol.

It was a large shot of nitrous that brought my motor down.

 

Good question!

In addition to this, I'm wondering if it's a good thing to bring timing up before this point and then perhaps trail it off a degree or two in the higher rpm's or as a general rule, do you bring it up to a point and hold it solid all the way through to redline?

 

peak cylinder pressure at peak torque.

 

hmm?

 

Cool. What if cyl pressure increases all the way to redline? maintain timing at an even amount? Or trail it off? <-- or was that a stupid question?

 

learning

 

General statement, not to you DTCD

 

Gotcha

 

I don't think that is a dumb question.

 

Well I was thinking I should re-word it a bit. Maybe I'll receive an answer? After peak cyl pressure / peak torque is what I'm wondering about. Does it make sense to continue to leave the amount of timing commanded at an even level or will trailing it off a bit help make more horsepower or to alleviate cyl pressure? Or as ebristol has seen, is it advisable to increase timing after this point?

I have a feeling the answer will be.. depends on the car -- need a dyno to find out. I realize that. I'm wondering if there is a general rule though. Maybe?

 

bump. hoping for a response from a professional.

 

IMO, make adjustments, do logs. Record times from a bunch of different pulls, all starting the same and ending at the same time. Shift at the same time each time and go from there. Nothing shows more proof than logging times.

 

or dyno pulls... easier to see results, but at a cost

 

Dynos dont account for real air and actual load. Street pulls do.

 

the street doesn't show a 2 hp gain from 1 degree of timing being increased.

the street doesn't show a 10whp gain from an afr change.

 

you're right, but a log of time elapsed for said pull does.

 

a controlled enviroment works much better for dialing in maf scaling, and little hiccup's a long the way

 

You right zach. I don't know much about timing/tuning. Yet anyway. I'm just learning. Where can I get hptuners from? I heard somethin about you having to buy credits to tune. What's that about?

 

www.hptuners.com

The program comes with 6 or 8 credits. It takes 2 credits to tune a car.

You dont have to buy credits for your own car, since it comes with some.

But if you were to tune someone else, they would need to pay 50 bucks a credit, for 2 credits...

 

Some tuners also have the cars unlocked for the year. Example my car is a 2006 and I have tuned quite a few 06's so I just unlocked them for the entire year make and model. So every 2006 chevy cobalt ss/sc does NOT cost credits. I think I almost have 08 and 09 lnf's unlocked too along with 07 ss/sc's. Still kinda far away on the 05's though. Oh well.

 

So its tuning the same for the 05-06s and the 07s? Somewhere on here I read that they were a lil different