Damn. Step away for a few days to go to Vegas, I get back and everyone is talking about timing.

Kaisoboy, I applaud you for getting the info you need, but you are a bit ahead of yourself... Unless, of course, you have your injectors dialed in?

 

Well I have not started tuning yet and I'm getting tired of this half ass tuning around here so I figured if I want it done right I better learn it myself along with Neo so we can tune our cars get it down packed so we can tune others that require it. I am trying to get all the information prior and the theory behind it. When you say getting injectors dialed in what are you referring to? I do have the 42lb injector stage 2 control tables and yes I know the will need to be tweaked.

What type of injectors are the stage 2? Do you have anything that might help out.

cheers

How was Vegas by the way. Will be heading to Arizona for the cart series in August.

Hey Steve

You should come up here to our meet in Drumheller alberta...haha That way I can pick your brain in person.

 

Oh, I get you. And there is def nothing wrong with that. I would incourage you to get all the info you can. I just caution against putting the cart before the horse. Remember the steps to tuning that I outlined before.

Getting injectors dialed = IFRs, offsets vs volts vs VAC, adders. Yes you need adders for the stage 2 injectors. And the stage 2 injectors (to answer your question) are Siemens 42 lbers. The offsets on the stage 2 map are too low, the IFRs are inprecise at best and GM chose not to use the adders at all. That is why some people have reported bouncing idle at with AC on and you can't get 14.7 at decel without changing the injector related settings.

Vegas was cool. Lost too much money, but saw some good shows. It was for my GFs b-day, so it was her gig, really. I was just kinda tagging along.

Oh, and I don't go to Canada on purpose.

 

^Can't handle the low crime rate eh...and I understand, you'd just get to drunk on our beer.

OK. I understand. Yes I do have the sweeping idle when AC is running. Not to mention even when the rear defog is on. I beleive with all the data we have collected we are pretty much ready to go. Still don't quite understand how to dial in the 60lb injector adders though. I do understand that GM compensated elseware to dial in the injectors. Can you shed some light on that when you have time?

Cheers

 

anything above 25 degree's on the lsj is useless.

 

Thanks Area

I am not trying to create a race day tune, but a more stable tune so there is not all this surging that drives me nuts because this is my daily driver. I appreciate all you guys helping out with info as this is my first tuning car that requires tuning this way. I am used to old school muscle way of tuning by ear...

I think all the info we have is a great start and as soon as we get some decent tuning weather we are going to start. Neo has the 60lb injectors and I'm still running my 42lb so one of the other things I have to be careful of is my IDC but I have not seen anything over 91% WOT.

I'm running 42lb inj, 2.85 pully, RAW 3"intake and GMPP cat back and we are at 3400' SL here.

cheers

 

Hey guys

What style of driving did you do when tuning VE and MAF?

 

Everyone has a different method. I usually try and keep throttle movement smooth and try and hit the most different road conditions as I can and all the revs.

 

For both?

 

dunno. don't do ve

 

ve tune FTL..

 

why is that?

 

our cars only use it if the maf fails

 

I used to do the VE table but I also agree now, it's pretty much a waste of time. May make things a bit smoother but it might just be in our heads.

 

hmmmm...I read that the MAF periodically checks the VE and makes adjustments. Can't remember where I read it tough.

 

????

 

I've heard that, but I'm still not convinced.

 

u can tune ur car..dump the ve part into the worse conditions..and it effects nothing

 

I you are going to go through all that work - you might as well tune VE. In the grand scheme of things, it does not take very long. Plus - if your MAF fails, you will kick yourself in the ass for not getting it done.

 

only reason why i even look at ve

 

On the 2006 cars - if your VE is not "in line" with your MAF tuning, you will have problems with your cruise control.

 

Think of it this way. The VE or volumetric efficiency table is the base for the whole tune would you not say. I would think that if you are trying to stabilize say something like MAF then it would need a source to check the air flow against volume. and pretty much every part of the tune is a volume or flow calculation so it has to have somewhere to check and correlate data.

 

You got it.

BUT for some reason (different ECU), on the 2007 cars, the VE table has alot less to do with normal engine operation - I say just buck up and do it anyways.

 

I know that before I always used to tune VE. Not that I've gone turbo I just wanted to tune the MAF so it was drivable and then do the VE later. Now I don't think I'll even touch the VE because it's smooth as hell.

 

did u copy and paste that? im telling u from experiance on alot of cars...so are the other 2 (area and black) ve doesnt effect our cars..but if u tune it good on u because if my maf fails ur golden...but dont expect to tune ve and pull 20hp outta it