(Ken)-Blown-383 4x4

Looks like I will be resetting my max shift points to 5000rpms

MAF Sensor maxes out at 327 g/s at about 5100 rpms this is where it stops going up!...suggestions guys?

85mm ZO6 MAF? or maybe a LS1 truck 6.0-8.1L MAF which is the same size? What is the max flow rate on these? I need something in the 400's g/s

I know James has looked into this but he's not on ICQ at the moment.

I've seen plenty of Z06 MAF sensors on ebay for sale...

Ken

Stroker 1500

iTrader: (1)

I don't quite understand how you got 327 g/s because the maf table in tunercat for a stock maf goes to a max of 278.258 which is 11000hz. Maybe the pcm has values higher than 11000hz but tunercat just doesn't have that table setup right in the program yet, might be worth emailing them over to see if they can extend that table. I remember james talking about going to the 6.0 maf. I know the maft for the ls1's works with our trucks so that means the maf should plug in. Since the maf is wired the same and can plug into our harness i would think you would just need to buy the 6.0 maf and then find a maf table from ls1 edit or something like that and convert it into tunercat for the hz vs gm/sec. I found this for the 2001 c5 maf http://www.ls1howto.com/index.php?article=25 .. im going to continue and look to see if i can find some more information.

(Ken)-Blown-383 4x4

May be a 1996 truck thing...my table maxes out at 256 gm/sec at 11000 Hz.

Ken

BigTex

iTrader: (16)

The stock truck MAFs are 85mm, same as the Z06 units. Our PCM has tables that extend out to 12000Hz, which is 454 Grams/Sec on our MAF. I wish it were more than that though.

You could probably make the swap if they are electrically compatible. Our units have 5 wires, 3 for the MAF, and 2 for the built-in IAT sensor. You can ignore the IAT if you want though. If your tunercat app will allow you to replace the values in the MAF table, you could just fill in the corresponding numbers from our tables. Sounds good in theory.

Stroker 1500

iTrader: (1)

It's under fuel tables then MAF Sensor Airflow VS Output Frequency . I belive that table should go to 12000hz even for us. I also found this post: https://ls1tech.com/forums/showthrea...ght=maf+tables
which appears to have the stock 6.0 maf about half way down with the gm/sec for the hz levels which is needed if you got a 6.0 maf

(Ken)-Blown-383 4x4

Looks like I am going to be stuck at 5K shift points until I get this figured out!

Thanks for the info guys...if anyone has anything else to add, please do so

Ken

Stroker 1500

iTrader: (1)

ya we have the ability to change our maf table, so all we would need is to adapt our 3 wire connector to the 5 wire of the ls1 maf and change the table and it should work. also on this site : http://www.ls1howto.com/index.php?article=25
it appears they used a adapter which made a 3 pin connector and then a 2 pin. one for the iat and one for the maf. The 3 pin with this adapter should plug right in place for our trucks

(Ken)-Blown-383 4x4

I can't increase the Hz but I can bump up the gm/sec to 512 max...any thoughts there?

Ken

Stroker 1500

iTrader: (1)

as far as increasing the HZ that was something im thinking might be problem in the tunercat software and that they might be able to extend that for us. as far as changing the gm/sec to 512 that will skew the reading and cause problems. The table needs to be accurate to what the maf is reading, that table is the measurement the maf is reading for the hz value. If you where to put 512 in there at 11000hz it would think the maf is reading 512 gm/sec when in reality the maf is probably reading the 324 at 11000hz where its maxed out. There isn't programming that will fix this. the only thing that will is a different maf such as the 2001 c5 maf. I also found that casper electronics makes the adapter to adapt the five wire maf to a 3 wire for the maf and a 2 wire for the iat which would plug into our trucks part number CAS108100

GoldenVelvet

Someone (Harlen?) was working on a duel MAF with a averager box. That would double the ceiling of the MAF. GM had a prototype GTO running duel MAFs also.