Is 255 the most the maf can flow or is 255 the most it can measure, if it can only measure up to 255 how can a person change that besides changing to sd.Also what does it flow with the screens and fins removed(good estimate)Is there a way to change the setting in the prom I have seen some maf tables that stop at 205 and others that go to 255.Thanks for any replys

 

255 has several meanings here.
It is the largest number that the ecm can understand for that calculation, ie FF. It also happens to be the max grms/sec that MAF can accurately measure.

The 255 as far as the ecm is concerned can be kilorams per fortnight. If you find a maf that at 400grms/sec has the same output as the oem one, then all you need to do is rehas all the MAF related items in the code. ALL of it. So you need a fully commented hac and understanding of how it works to do that.

Going SD so far is by far the best answer.....

 

Good point Bruce. I find it funny that people would be willing to do ALL that work (and it would be a LOT of work) to retain the MAF (which is a restriction). When with a LOT LESS EFFORT they could develop near PERFECT VE Tables where they don't have to live with "compromises" and can be to "tune perfectly" for the effects of elevation and ambient air temp (which MAF can't).

And, in the end of it all, they wouldn't have that restriction either.

 

Well you guys are looking at it from the wrong side of the fence

1.) Gotta find a good SD ecm (yes i know of the interchange theory)
2.) Gotta get refamiliar with the ecm (big differences from maf)
3.) HARDEST PART. Finding (and installing) a reasonable harness, personally I refuse to run a painless because 1. I gotta plug the big hole in the fender wall from the stock cable. 2. The cable lengths etc aren't specific to F-body's. 3. THE PRICE

An OEM one costs more, or if you go used/junk yard you're GOING to miss a few plugs/wires.

yes sd is grand, yes it'd be neat if we could all have it, but even finding a MAF harness (for us 870 guys) to repin is a PITA.

My 870 harness wont survive another repinning

 

Have you looked at Mike Davis' web site where he converts from the "870" to "165" and then "165 " to "730"? He didn't install a completely new harness to my knowledge, but repinned/wired it.

Unfortunately, it is highly unlikely there will be a solution for the "MAF maxxing problem" on a car that hasn't been produced in 13+ years. Your solution is to either "kludge it and live with it" or "convert".

And even if there ever is a solution, there still is the problem with the 165s inability to ACCURATELY compensate for air temp, elevation or humidity. It will always be a "compromise" at best.

 

yea I'd say i'm familiar with it

But if you've ever seen it in person it leaves the harness pretty hacked up, and if you ever needed to go back through it there isn't much hope for you.


repinning once is acceptable, but twice is a mess.

 

Well, then there's the "kludge" using the PE tables. This is what I am using on my buddy's '165 MAF 383 pushing around 500 HP.

We've had good luck so far, but ultimately we'll probably convert too.

 

Believe me, we ALL want to run SD


And if you find a reasonable harness or place to get one be sure to let us know

i called GM and they said $700 for an OEM one

and all the aftermarket ones have no previsions for the huge square hole in the fenderwall

 

How do you kludge the pe tables ,also I see the timing table charts stop at 4800 rpm so what happens after that is there a way to increase the charts for higher rpm. THANKS FOR ALL REPLYS