Hacked my 2g MAS today, problem...

[OneFastEclipse]

I decided to do the MAS hack as seen on RRE's web page and now it seems like it is impossible to tune my Low throttle. The car runs ok except a little on the rich side. When I go to tune it with my pocket logger, it can't make up it's mind on whether it is rich or lean. One minute it will be extremely rich, then the next minute it will be extremely lean. It just keeps jumping back in forth making it impossible for me to tune. Anyone know what is up? I almost think it isn't worth the hassle and I am gonna just put the honey combs back in. Thanks!

 

[psychlow]

It all depends on the particular sensor you're doing, and many times, hacking isn't a good mod.

Karman-vortex (stock DSM) sensors require air vortices (turbulence) to vibrate a plate in order to register airflow. The honeycombs are there to stimulate a certain amount of turbulence for a given amount of air.

When you remove the honeycombs on some sensors, you remove the sensor's ability to accurately measure airflow at low airflow levels (idle), since there are not enough vortices to measure.

What do your fuel trims look like? Have you given the ECU enough time to compensate and tune itself before you modified the settings with your own tuning?

 

[OneFastEclipse]

I adjusted it immediately after I was done hacking it with the SAFC so I could get the car to idle. It was loping really bad and then would die after a few seconds. I got it to idle pretty smooth now but it is still reading 12% on my LTFT. The STFT will jump from -4% to 8% repeatedly like it can't make up its mind on whether it is rich or lean.

 

[doug]

You should probably give the ECU a day or two to relearn everything first, then try to adjust stuff. Like was stated though, it's not that good a mod on 2Gs. I did it for a while, and the car ran fine, but there's no perceptible performance gain and as you mentioned it made tuning harder, so I put mine back in.

 

[Eclipsei95cl]

People are still doing the hacked 2g mas mod? Wow I thought dsmers ruled that out a few years back seeing how it hurts you rather than help you.

 

[2bar]

I just recently put my honeycombs back in. I could not get the car to idle right after warm up for the life of me. I did a 6 bolt sway and thought is was somthing with that. but I installed the honey combs and readjusted my afc and no more problems. The only think I noticed that is just made my bov louder. NOT a good mod. If you going to do a mod go to a maft and gm mass air

 

[Maglin]

The 2G MAS is a really good unit for most all DSMers to run. It can handle the airflow requirements of most all of the turbo's that most are running around here before you reach MAS overrun. The 1G MAS sucks. It is overran very quickly. I currently overrun my 1G now with the stock 14B. I personally don't see a reason to use the MAFT and GM MAF unless you wanted to either tune with the MAFT or you just really want to vent your BOV that badly to go and drop almost $300-$400 for all the parts required to put it in.

I'm not knocking the MAFT. It's a kick ass product that works great. Just people think the 2G MAS is restrictive for some reason and replace it cause of that. My 2G MAS should be here in a few days. I personally plan on running it until I'm putting out over 500 HP and start to see MAS overrun. This is just my opinion though and everyone has one.

If you have a SAFC or DSMLink or know how to program your ECU then the 2G MAS is the cheapest upgrade for the 1G and good to stick with for the 2G.

 

[Turbo Talon DL]

The 2G MAS is a really good unit for most all DSMers to run. It can handle the airflow requirements of most all of the turbo's that most are running around here before you reach MAS overrun. The 1G MAS sucks. It is overran very quickly. I currently overrun my 1G now with the stock 14B. I personally don't see a reason to use the MAFT and GM MAF unless you wanted to either tune with the MAFT or you just really want to vent your BOV that badly to go and drop almost $300-$400 for all the parts required to put it in.

I'm not knocking the MAFT. It's a kick ass product that works great. Just people think the 2G MAS is restrictive for some reason and replace it cause of that. My 2G MAS should be here in a few days. I personally plan on running it until I'm putting out over 500 HP and start to see MAS overrun. This is just my opinion though and everyone has one.

If you have a SAFC or DSMLink or know how to program your ECU then the 2G MAS is the cheapest upgrade for the 1G and good to stick with for the 2G.

I agree on this 100%, just you already said it ! The 2g mas is easier to install also, cut, match, and solder wires. http://www.vfaq.com/FAQlocator-intake.html That shows why its a good idea to go with the 2g mas. 2g MAS with an afc and some sort of timing control plus a keydiver and some sort of logger can be a good combo to tune with Much less than a DSMLink also