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View Full Version : To 2bar or not


Slowrc
January 27th, 2009, 01:33 AM
I have a lq4 swapped STS turboed reg cab truck I want to tune. I run about 7 psi and I think I want to keep my maf. Will a 2 bar map help me tune this thing or should I keep the 1bar since I am keeping the maf? I am pretty green to this tuning so please explain your anwers fully. Thanks, Rodney
Lextech
January 27th, 2009, 03:22 AM
Absolutely--Get the 2 Bar MAP sensor. There is no reason to have EFILive and not give the PCM the correct information it needs.

Jeff
Slowrc
January 27th, 2009, 01:49 PM
Can anyone tell me whats involved? Will it change my current tune? I know this has all been done many times. Anyone???
Lextech
January 30th, 2009, 03:09 PM
You will need to rescale C6301 to 190 for the 2 bar MAP sensor. COS3 would also be a good upgrade for your boosted application.

Jeff
nonnieselman
February 2nd, 2009, 02:19 AM
you can remove your MAF and just install a IAT sensor along with the 2 Bar MAP and get to tuning. Thats what i did and its very simple to do.
SSpdDmon
February 2nd, 2009, 08:51 AM
Anyone have the part number for a 2-bar MAP sensor that fits the LS1/LS6 style intake?
Biggsy
February 2nd, 2009, 09:04 AM
http://forum.efilive.com/showthread.php?t=1581
Slowrc
February 5th, 2009, 05:21 AM
you can remove your MAF and just install a IAT sensor along with the 2 Bar MAP and get to tuning. Thats what i did and its very simple to do.

I don't want to ditch my Maf, I like my stock driveability. Maybe I should do what you suggest and if I don't like the results I could just go back to my saved tune. There is a happy middle ground somewhere I think. seems like I should be able to tune the auto ve up to the point of 0psi. then use to 2bar to take over from there. keep the info coming ...Someone will get me straight.
nevinsb
February 5th, 2009, 05:28 AM
I am using 12580698 MAP sensor (Now 12615136)
nonnieselman
February 5th, 2009, 07:29 AM
why you against ditching the MAF? You won't know the difference having it or not.
I'm running Custom Operating System 3, tuned open loop speed density.
its leaned out while cruising so I'm gettin better gas mileage, and its simple to tune.
fastsspr
May 11th, 2010, 06:39 PM
why you against ditching the MAF? You won't know the difference having it or not.
I'm running Custom Operating System 3, tuned open loop speed density.
its leaned out while cruising so I'm gettin better gas mileage, and its simple to tune.

How you do that?
nonnieselman
May 12th, 2010, 03:24 AM
How you do that?

Autove


COS has a commanded fuel table (B3647) just command what AFR you want and go dial it in.. Look in the tutorials for auto VE.