Hey it's STS2/SS how the hell is my MAF maxxed out at 4000 rpm's? I make beuttifull power untill that happens any idea on how to fix the issue?
Here is with a 2.7 pulley

here is with the 2.6 pulley

With the 2.6 the MAF sensor frequency was 10,000 Hz at 5,500 rpm's
With the 2.7 the MAF sensor freq was 10,000 Hz at 6,000 rpms.
You can see the HP/TQ suffer from it. The engine at those rpms actually sounded like it was skipping?
Any help would be nice!

 

maybe post up logs and your tune??

 

^^ well, when there is no MAF input, it definitely sounds like the car starts skipping/misfiring. However, these MAFs are supposed to be good to over 500hp....its the same MAF thats on the Z06, or so I hear..so idk why it would be maxxing out so low. Maybe theres a restriction where the actual MAF sensor is, so it thinks its seeing a lot more flow than it actually is? course then this would make you run really rich...so probably not.

 

I really need fred to send my logs. I'll try and get em today! Thank you.

 

curious to see what is happening... i have the same problem, i thought maybe it was because i am close to having my injectors maxxed
altough i never throw a code off of it

 

Not to sound like captian obvious, but have you removed you're intake, cleaned the filter, cleaned the MAF, made sure the entire intake from filter to sc is nice and tight? Also pull a couple plugs and re check the gap? Reset the ecu? I've had a lot of skipping, flattening out, and weird acceleration issues myself and Ive always been able to fix it by cleaning/resetting everything and checking the ignition etc.. I dont know about the rest of the 06 SC's out there, but mine sure was a tempermental biatch.

 

sts has plenty of injector left...

he had the same problem before he put his intake on with a new filter and all...

and yes the 06's are horrible they just fight you everywhere you go

 

ive spent plenty of time on the plugs.. 4 different sets at all gaps.... hours of fun....
intake is clean, tb clean, maf clean.... might get a new maf sensor

 

Without know what your mods are it'll be hard to tell anything. But that last sheet you can see your AFR getting leaner at about 122, was there anyway to monitor your Injector Duty Cycle?? You may need to run it leaner. What is the IAT2?? If your generating too much heat there's a good chance you'll get knock.

 

mine stutters at 4.5k when im on it, then if i go easy it wot do it till about 6k

 

no heat problems with the car he has exhaust header intake ported sc intake manifold 60# injectors and now a 2.6 pulley

 

the only reason why your maf is maxed on a blower car is due to improper tuning.

due a WB error log, copy her over by % and a few runs latter you'll have a dialed in maf.

if you lack the ability to due so, or if you mess that up you can go the uber ghetto way and scale the maf table on your own.

also, setting the maf fail freq higher will net more head room to work with.

 

06Black I just called my tuner and left a message on his phone to let him know your input. I also think that could be it. I wish I had the ability to use the HPT. Anyone in the CT/RI area with one that wouldn't mind helping? I cant get a hold of Fred as usual?

I'll take a look at all the obvious today. I have 2 step colder NGK's gapped to .035. I need to buy a better intake that is bigger in diameter. I think that will make my MAF think it's seeing less frequency?

 

You would still need to recalibrate the MAF after changing intakes. It's not going to make a Huge difference but it will be off by 5 to 10%

 

10% isnt a lot? Anyhow, you could bring the MAF to the dealership to test and make sure its functioning to spec?

 

Bah.... 10% no biggie.
On a 2.8, that's only about 50cfm not accounted for.
Only enough to change an 11.5 AFR to 12.8-ish.

 

Thanks.

 

ok it wasnt just me then

 

what should it be calabrated to for a 3" intake?

 

it's the size of your intake tube I'm telling you. That custom intake can't help it. You have to atleast change it too eliminate the problem.

 

Everyone's car is different.
My car with a 3" will be different than your with a 3".

 

ive never had a problem with it before nor thrown any codes from it... there are alot of people running 3" intakes... i guess ill just have to recalibrate it

 

what do you think about the rebbel unit?

 

That's what I'm running. Pretty good unit. Bit of a long wait time to get one though... unless you can find one used.

 

the larger intake drop's maf freq's as well...allows for more power to be made with out maxing the MAF.

as long as you scale it appropriately.