LS1 5 Pin MAF on LT1, Stock PCM? - Chevy Impala SS Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 05-22-2012, 07:54 AM Thread Starter
Senior Member
 
Hilpala SS's Avatar
 
Join Date: Aug 2003
Location: Fort Washington, MD
Posts: 6,032
 
Send a message via AIM to Hilpala SS
Question LS1 5 Pin MAF on LT1, Stock PCM?

Greetings,

Most of you have caught a post or two where I mention that I'm converting my setup to run without the opti and will be using the LS1 411 PCM, of which I'll be using the 85mm 5 pin MAF. I was wondering out of curiosity if anyone is using that same MAF with an LT1 pcm and if it's even possible? I can't locate the thread on the F-body forum where somone claimed to have done this. I know the earlier LS MAFs were very similar (if not identical) to the 3.5" MAF of the LT1 so more insight would be greatly appreciated.

Pic below:


Hil Was Here...

Quote:
Originally Posted by ProTools4 View Post
at some point a large overlap high compression motor with long tubes is going to shake & make so much sound that all metal spherical suspension noise transfer is another musician in the symphony of "Hot Muscle Cars Rule" in B minor
Hilpala SS is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 05-22-2012, 11:34 AM
Senior Member
 
Rocko350's Avatar
 
Join Date: Apr 2007
Location: Mount Airy,MD
Posts: 3,912
 
It was here . It was a gen 3 truck MAF. I hav the tranfer table data on my laptop at home. I thing beertstr was one opf the guys involved. Maybe it was Hussker. It was one of those guys...

Chris

94-95 Scan. Free, well written diagnostic software
http://www.mediafire.com/?0elo4c935uc5s
Rocko350 is offline  
post #3 of 6 (permalink) Old 05-22-2012, 11:56 AM Thread Starter
Senior Member
 
Hilpala SS's Avatar
 
Join Date: Aug 2003
Location: Fort Washington, MD
Posts: 6,032
 
Send a message via AIM to Hilpala SS
Gotcha...someone was interested in the MAF I was selling and I swear someone had devised a method to use this with our stock PCMs. Thanks Rocko!

Hil Was Here...

Quote:
Originally Posted by ProTools4 View Post
at some point a large overlap high compression motor with long tubes is going to shake & make so much sound that all metal spherical suspension noise transfer is another musician in the symphony of "Hot Muscle Cars Rule" in B minor
Hilpala SS is offline  
 
post #4 of 6 (permalink) Old 05-29-2012, 05:02 PM
Senior Member
 
Join Date: Sep 2000
Location: CT
Posts: 4,993
 
Quote:
Originally Posted by Rocko350 View Post
It was here . It was a gen 3 truck MAF. I hav the tranfer table data on my laptop at home. I thing beertstr was one opf the guys involved. Maybe it was Hussker. It was one of those guys...

Chris
It was me, I did this math years ago...the original LS1 MAF is actually the same 3.5" MAF as the LT1 cars, except the screen is epoxied in rather than held in with a snap ring. This 5 wire MAF first came out in ZO6's and trucks...was never used in the F-Body.
Attached Files
File Type: zip 85mm MAF SSRI and stock location.zip (8.9 KB, 319 views)

2010 Camaro 2SS LS3 TR6060 heads/cam/LSXr...500rwhp daily driver.
2005 Silverado RCSB 5.3/4WD

Last edited by MikeOD; 05-29-2012 at 05:23 PM.
MikeOD is offline  
post #5 of 6 (permalink) Old 05-30-2012, 07:47 AM Thread Starter
Senior Member
 
Hilpala SS's Avatar
 
Join Date: Aug 2003
Location: Fort Washington, MD
Posts: 6,032
 
Send a message via AIM to Hilpala SS
Thanks Mike! So is it still possible to use the 85mm Truck/ZO6 MAF on LT1 cars without converting the PCM? I can't open that file but I'll point Rocko back to this thread as I'm sure he has software that can.

I truly appreciate the help!

Hil Was Here...

Quote:
Originally Posted by ProTools4 View Post
at some point a large overlap high compression motor with long tubes is going to shake & make so much sound that all metal spherical suspension noise transfer is another musician in the symphony of "Hot Muscle Cars Rule" in B minor
Hilpala SS is offline  
post #6 of 6 (permalink) Old 06-05-2012, 08:49 PM
Senior Member
 
Join Date: Sep 2000
Location: CT
Posts: 4,993
 
It's just a ZIP file with a spreadsheet in it.

Yes, you can use that MAF with an LT1 PCM. You need the right connector, and you can actually remove your original intake air temp sensor as well. The 5 wire MAF's have both MAF and IAT in the same sensor, makes it a little cleaner.

I did some research on the IAT calibration as well at the same time, and the info I was able to get says the original seperate IAT and the IAT in the 5 wire MAF are the same...so you literally just bring those 2 wires, and the 3 MAF wires, into the new connector, plug it in, and you can use my spreadsheet for starting data for the MAF calibration. It will never be perfect with my spreadsheets as the entire air intake affects the calibration, and your intake is likely not identical to a ZO6 or a truck, but it should get you started down a path that any competent tuner can complete.

2010 Camaro 2SS LS3 TR6060 heads/cam/LSXr...500rwhp daily driver.
2005 Silverado RCSB 5.3/4WD
MikeOD is offline  
Sponsored Links
Advertisement
 
Closed Thread

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome