your car isn't magically flowing any more air with just a tune... its just a maf recal or air temp related

 

right. that wouldn't make sense without an intake/tb/rotor/housing/exhaust change.. either way car actually pulls when i step on the gas now

 

the AP is magical!

 

If only there was some way the AP could improve the vacuum of the engine...

 

Incorrect. If combustion efficiency goes up, airflow goes up. That is the point of tuning.
I don't do anything to recalibrate the MAF that would account for more than a fraction of a gram at cruise.
Maybe you are a prime candidate for the seminar.

Why? Are you trying to clean your rugs?
Vacuum is a function of compression and sealing. You could bump your idle OMP values, but there really isn't any reason to do that.
Check your vacuum as you cruise at very low throttle and 3000 RPM. That is your "real" engine vacuum.

 

Actually I do need a new vacuum the current one keeps chewing up the belts.

That's what I was alluding to is improving the sealing via OMP or pre-mix. Probably not a huge effect but every little bit I suppose...

 

Rofl.

Speaking of airflow... whats are the points of the RPM curve and which gears does the car generate the highest flow? Is there a standard area that tends to be the peak for flow? Also what is the average max airflow for a stock 8 and what is the max people have seen both NA and FI?

 

I think I went to college with the girl on the left in your av, MM.

 

Ok.. I have 4 MSD ls2 blaster coils on order, question for MM. will I anything need to be changed in my tune going from stock to msd ls2 coils? I don't know if they have the same dwell issues of mazsport or anything..,. I'm willing to bet once I change to the new coils it's gonna solve my problems... I DID notice, that when I start it cold, and it idles high, it's a bit sputtery.

 

your about as comical here as in e-mails
oh, and find out how the MEP is effected by combustion efficiency

 

Any clue when il receive my map?? its been a while... I did receive confirmation that it was ok..

 

MM has told me my tune is complete! Car runs like a dream! My AFR's under WOT are in the low 12's.

Thanks again Jeff for the work you have put in to give me a better running 8 !

 

Hopefully I get my tune soon as well =D

 

^ you will.. MM is a busy man. Give him time, and be patient ( I know its hard...)

 

i know ive been patient. lol. this is first time i asked to see the status.. its been a month?

 

actually, it does make sense, unless i'm completely off my rocker. If you cram a whole bunch of air and fuel into a chamber, and blow it up, the more complete the combustion, the higher pressures (aka torque) you'll get. When the exhaust port opens, if there is higher pressure, more exploded air/fuel will leave the engine, leaving lower pressures in the engine after the exhaust port closes. You can fill the lower pressure chamber with more air in less time once the intake port opens, since it takes less energy to pressurize air..

...I just didn't realize it was that much MORE airflow.

 

with port overlap there could be a small increase in flow but big picture its insignificant... in our engines its completely wishful thinking

The AFR effects how well the mixture will burn and how fast it burns. Timing effects when it burns. The idea of tuning is to find the ideal burn rate and timing that creates the most amount of work on the piston/rotor. Thats the real "point of tuning".

 

Been spending a lot of time on the dyno with that lately?

So, you wanna hazard a guess at where the extra flow is coming from since the MAF isn't being recalibrated as you asserted as your explanation elsewhere?

 

With my latest tune 4.0.3 my idle gets a little wacky. It stays around 800 and then i hear a thump and it drops to 700 to just resume at 800 a second later. This thump comes every 10 seconds during idle.

I'm going to take logs for the next tune tomorrow. Should I revert back to 4.0.2 while waiting for 4.0.4 or is this idle-thumping ok?

 

The "thump" is probably a lean-misfire.
It won't "hurt" anything, but I'm sure its annoying.

 

the extra hot air from your head?

 

lol. I didn't think you would give up so easily.

 

MM, I just got a pack of ls2 coils. i'm on map 4.0.1, will I have to start over again? or can I continue?

 

No, you should stay with your current calibration.
Just make sure you add any changes to your 11 questions (but only AFTER you have actually installed the parts).

 

ok, thank you very much mm.. I was just worried about wot on the ls2 coils. i'm installing them now to see if they fix that sputter i've been having, I was told months ago that my coils were bad after I bought them about 3 weeks prior, so I didn't believe the mazda dealership. I couldn't believe that coils could die in 3 weeks. Now i'm thinking it was my coils.