I don't want to use an SD tune on my LY6 turbo build (if I don't have to). I like the driving characteristics of the MAF. At what hp/boost are people running into issues with the stock metering?

My goal is 800whp with meth through a 4l80e and S475

 

I'm not going to say its impossible, but at that level its becomes a little impractical.

 

...ok. Why?

 

What ECM are you using?

 

It's probably an E38

 

Yes, E38.

 

Well if it's an E38 then depending on the OS it will go to the moon with the MAF and your goal is plenty doable.

 

IIRC a large portion of the factory units start breaking up around 12psi? I don't remember which ones can handle a higher load.

 

I plan to use HPTuners

The factory MAF, OSCS?

 

The PCM

 

I hope it can handle it. I want this car to be as streetable as possible on pump gas and meth. It is going in my '71 Chevelle and I refuse to lose to my buddy's '72 with a T-Trim. Gotta have goals right?

 

Why are you so scared of SD tune? I can't tell the difference one way or the other when the right person gets a hold of it.

 

I've heard that cold starts are barely a issue and everything else is the same otherwise.

 

Then don't worry because the E38 will read well over 1000 rwhp with a MAF depending on the operating system used.

 

There are opinions on both sides here that makes this a little murky.


Why is the PCM the limiting factor?

What OS is needed to make the MAF work?

 

Not sure on the specifics. I'm not a tuner.

 

I have never driven in an sd car apart from the older 5.0 Mustangs so I don't know exactly what to expect. However if I can get what I need with the factory components then I am not opposed.

 

There are tons of factory cars that don't use a MAF. 99% chance you won't be able to tell the difference with an SD tune.

 

I like the 2009 LS3 corvette OS for something like that since it already has the extended MAF table or maybe a 2008 Silverado OS with the enhancement applied to extend the MAF table. Either should work with a 4L80 TCM I believe if you are wanting to control the trans with the TCM, or run a manual OS with a MVB 4L80. A lot depends on your wiring harness, ECM/TCM part numbers, etc though so don't quote me on this.

 

I run MAF only on my 07 E38. 780 RWHP and plenty of room for more. Just use the 2.5 bar OS in HPT which extends the maf range. Works fine.