2K Corvette C5 / SuperCharged tune check

[Z06SUPERCHARGED]

I do not have my tune laptop or any files with me as im out of state and wont be back home until August sometime. Sent you a PM to ask more specific q's about the calculations your figuring out .

[titanium_skeleton]

I will be running this same setup an just need a base map to start. Looking for some smart people with good inputs ideas. New to this program an am willing to listen an learn. I would like to see more base maps for this set up. Or just good Ideas it makes sense to me to keep the map in aswell I am at 3500 feet an temp extremes like crazy ! dam CANADA an rocky mountains !

[titanium_skeleton]

Basically from what I have read redoing the tables for the bigger injectors/ higher fuel pressure. 2 Cut back on timing 3 . create a second table for boost only peramitors (os system ?) lower thermo settings , Sorry for being so new ! just don't have software yet an not sure efilive or hptuner ? got the A&A kit from cali but the local tuner will not tune it because i dint buy from him !!

[LSxpwrdZ]

I did a car similar to this not long ago that was ARH LT's, Xpipe, and some kind of catback (can't remember brand) and a Novi 2000 blower on unknown boost (LOL). I started out conservative on the dyno with this car and slowly gained RPM on each pull to keep from maxing out the MAF. Finally did a full pull and noticed it peaked the frequency on the MAF sensor above 5800rpm. I left the 6200 rpm limit on the car and I had scaled this particular tune 50% so I was able to crank up, if you will, the last cell on the MAF table to keep the car safe. I recommended they convert to a 2bar SD tune though and they said when they get ready to do a cam later on it will get the 2bar SD tune then.

Anyhow I still don't know how much boost it was running but on my dyno dynamics it only made 42x rwhp.... not much but on this dyno it is lol... truly a heartbreaker. My Cam only Formula made 395rwhp on a DJ and a few weeks later on my dyno I had just purchased made 348rwhp.

[titanium_skeleton]

I am almost done the install same setup 2000 c5 manual . Corsa cat backs bassi x pipe a&a v3 supercharger 60 lbs injectors innercooler. Bigger fuel pump cooler plugs. Not sure what stats in the car right now. But I thought I had a stock tune ... After tonight NOT SO ... How did you make out on tuning your auto ? Any chance I could see the tune now that its tweeked ??
hes what I have to try an figure out I need the stock Tune But I dont have one !

[Jabbott]

Here is what I don't get. Just because you hit the ceiling of your MAF does not mean you have to start looking at the PE or a SD only tune. It means it is time to change the MAF. There is ceiling in PCM and it can only read to a certain HZ depending on what year your car is. I just finished a 03 ZO6 with and A&A, the car at 6500 RPM is only in the 10,000 HZ range. Why, because I put a bigger MAF on it. If you increase the size of the housing on the MAF you decrease the Speed of the air passing through it which decreases the HZ level and you are getting the same amount of air. Problem fixed for $400. If you are at you should also change the MAP sensor to a 3 bar sensor that is on the ZR1. Even though your VE table will not show you the upper cells, the PCM is still reading the MAP at the higher KPA and is using that in it's fueling calculations also. I mean if you want it right you do it right, if you don't then you apply bandaids, it is really as simple as that.

[titanium_skeleton]

Here is what I don't get. Just because you hit the ceiling of your MAF does not mean you have to start looking at the PE or a SD only tune. It means it is time to change the MAF. There is ceiling in PCM and it can only read to a certain HZ depending on what year your car is. I just finished a 03 ZO6 with and A&A, the car at 6500 RPM is only in the 10,000 HZ range. Why, because I put a bigger MAF on it. If you increase the size of the housing on the MAF you decrease the Speed of the air passing through it which decreases the HZ level and you are getting the same amount of air. Problem fixed for $400. If you are at you should also change the MAP sensor to a 3 bar sensor that is on the ZR1. Even though your VE table will not show you the upper cells, the PCM is still reading the MAP at the higher KPA and is using that in it's fueling calculations also. I mean if you want it right you do it right, if you don't then you apply bandaids, it is really as simple as that.

So lets see if I am understanding this right... maf table maxes out at 14 k .. Bigger maf sensor less air velocity lower output Hz ..... If I am going this far and want to do it right. Upgrade to a 2 bar or 3 bar an change OS an dont fail MAF once tune is setup an done ???

[Z06SUPERCHARGED]

Its not the Hz that usually maxes first on blown applications its the 512 g/sec that maxes way before the HZ does. Dont matter if you get a bigger maf once you are past the 512 limit.

[SargeZ06]

I am starting a class action lawsuit against GM for selling me a car with a raped PE table in the stock tune. Gees, you would figure they would know someone who can tune.

[LSxpwrdZ]

In most cases the actual and commanded are still fairly close on a stock GM car. Those commanded rich PE tables you see actaully run that rich from the factory. This is part of the reason why I gain on average ~15-20whp on stock vehicles with only a tune.

The 512 g/sec limit is also easy to get around. Scaling... anything with boost anymore I scale 50% just to gain resolution in timing tables and airflow. Also seems to make some corvettes act better and keep from throwing that crazy airflow to TP correlation code.

Jabbot the PCM will not base it's airflow calculations off of a 3bar sensor if it's not programmed in the PCM to do so. That would be like increasing the MAF size as you suggested without re-calibrating the MAF vs Output Freq. If you put a 3bar sensor on the car then the PCM needs to know it is there. Also it is pointless to use a 3bar sensor on a 1bar OS because above 1bar it will not change anything. The sensor will be capable of seeing boost but the PCM will not reflect any changes.

[edcmat-l1]

Jabbot the PCM will not base it's airflow calculations off of a 3bar sensor if it's not programmed in the PCM to do so. That would be like increasing the MAF size as you suggested without re-calibrating the MAF vs Output Freq. If you put a 3bar sensor on the car then the PCM needs to know it is there. Also it is pointless to use a 3bar sensor on a 1bar OS because above 1bar it will not change anything. The sensor will be capable of seeing boost but the PCM will not reflect any changes.

Exactly. Without setting the linear and offset for the 3 bar, the car won't even run. That's point 1. Point 2 is, if you don't have the corresponding VE table, there's no use having the 3 bar MAP.

PS the 512 g/sec can be worked around as well. Scale the MAF/VE/IFR and no more problem.