LS7 card maf

[VX L67 Getrag]

Well I made up an excel sheet of 4 of those 5 cars maf Hz Vs rpm from Hp tuners (5th car had it setup as Hz Vs g/s) but I'm not sure how to compare in the excel sheet to get the curves?

[antus]

Whats hp tuners giving you?

I pulled out hz vs gms/s from efilive and got this.

watch out for the 5800hz thats doubled up between the two factory tables the way its been done.

If you mean where do you put hz in the spreadsheet, i'd say ignore the % change column and overwrite the new gms/sec column with values figured from the chev tune.

[VX L67 Getrag]

Yeah saw the low rpm & hi rpm change over at 5800 so I just made it 1 big line, but all these are Hz Vs RPM the other file that I didn't copy was Hz Vs g/s.

[antus]

I only see 2d hz against grams a sec, even in your data.

[VX L67 Getrag]

Sorry Ant, I'm not sure what you mean, I'm probably mis-interpreting as usual but left column is RPM & right column is the Hz that relates to it in 2D but thats how it is in HP tuners?

I've attached the other odd one which is supposedly Hz Vs g/s.

[antus]

Nah, have a closer look at mine. The data is in yours is all hpt messed up (they havnt set up the equasions).

You can use efilive as the demo version and get the tune from tunefile depot and source your info that way. (right click top left corner of the table and pick copy... with labels and paste in to excel.

[VX L67 Getrag]

You mean for that last 1, thats what I thought too as it was backwards & forwards with numbers, but the other 4 seem o.k.?

[yoda69]

I'm away for a couple if days so will try and have a look over the weekend.
To hard to do much with excel on an iphone.

[VX L67 Getrag]

LOL don't expect anything from anyone, but appreciate everyone's efforts!

Was hoping once we get is scaled so it reads close to what is standard then it's going to be the cheapest & easiest option for everyone to buy & use, my testing with the LS6 maf is with it's 11KHz limitations there's not much point trying to convert to it unless you start at a lower scale & can steal some extra from it there!

[yoda69]

Was doing a little bit of reading on the LS7 MAF and cam across this that may cause headaches like we've seen on other MAF's:
http://www.jdpmotorsports.com/genuine-g ... r-15865791

Genuine GM - LS3/L99 and LS7 MAF SensorDesigned to provide a smooth idle and consistent power throughout the entire powerband. GM offered MAF sensors that were manufactured by 2 difference manufactures; there is a "weak" and a "strong" sensor. The “weak” sensors do not show the same resistance levels as the “strong” sensors. The MAF sensors that have been identified as “weak” read 1560-1670HZ at idle while a “strong” MAF reads at 1800MHZ. When driving on the road at partial throttle the MHZ are slow and weak in response to throttle changes which is what causes the hesitation. When at wide open throttle the “weak” MAF shows 120-170MHZ lower than the 8600MHZ “strong” MAF sensors show on the same car. The fuel trims with a “weak” MAF can range from -25% on the high end to -3% with a simple aftermarket panel replacement filter. Simply remove the “weak” sensor and install a “strong” sensor and within seconds the fuel trims go to 0% and MHZ are back to 1800+. This will completely change the responsiveness of the car.

How to determine if you have the "weak" MAF Sensor
When the MAF sensor is removed you will see an indented portion on the back side. Within this indented section there will be a letter or a letter followed by a number like the MAF shown above. If you have a MAF with a single letter you have a "weak" MAF sensor and if you're MAF has a letter followed by a number you have a strong sensor. If you already have the "strong" sensor you have nothing to worry about. Please feel free to call or email us anytime with questions.