MAP sensor - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

general23cmp · 09-07-2009, 12:04 AM

Does the stock L99 have a single bar MAP sensor that needs changed out if going with forced induction?

*mlee* · 09-07-2009, 12:13 AM

Do you mean MAF Mass Air Flow?... and what exactly do you mean by forced induction?
Blower or CAI

general23cmp · 09-07-2009, 12:25 AM

No, I mean MAP...Manifold Absolute Pressure.

Typically LS engines have a 1 bar meaning they measure from full vacuum to atmospheric. A Supercharged Cobalt, for example, has like a 2 bar one to measure boost. many people, when tuning, decide to go without the MAF totally, and just use the MAP sensor for air estimates.

Let's say a turbocharger for sake of discussion....a Maggie might have that built-in.

*mlee* · 09-07-2009, 12:35 AM

OK... got it... I've heard of some replacing the MAF with aftermarket MAP. Not sure if there is a stock MAP sensor someplace else.

general23cmp · 09-07-2009, 12:52 AM

Well, I suspect it has both a MAF and a MAP from the factory.....The LS1 engines did. It's just that some folks do not MAF sensors and use the MAP solely.

I was just wondering if it needs swapped out for a boosted engine for the programming to work right.

vsgls1 · 09-07-2009, 08:19 AM

I thought the LS3 was 1.5 Bar, not sure on the L99.

pharmd · 09-07-2009, 08:31 AM

Yes, you need to replace it (if you are L99 for sure, I can only comment on that)...I got rid of my 1 bar and added a 2 bar...my tuner said it would have been cool if they would have come with the ZR1 style 3 bar, but oh well.

general23cmp · 09-07-2009, 07:10 PM

Quote:

Originally Posted by pharmd

Yes, you need to replace it (if you are L99 for sure, I can only comment on that)...I got rid of my 1 bar and added a 2 bar...my tuner said it would have been cool if they would have come with the ZR1 style 3 bar, but oh well.

Do you know any part numbers?

pharmd · 09-07-2009, 09:37 PM

Quote:

Originally Posted by general23cmp

Do you know any part numbers?

Send 1sickta a pm and ask him...I think he knows what to tell you to ask for.

Kilo-9 · 09-07-2009, 10:19 PM

gmpartsdirect online catalog shows these part numbers for the ZR-1:

pressure sensor, baro 12591290

pressure sensor, inlet 12592525
pressure sensor, outlet 12592525

Please VERIFY these numbers before ordering.

09-07-2009, 12:04 AM	#1
general23cmp Drives: 2010 RS SS Join Date: Aug 2009 Location: Huntsville, AL Posts: 196	MAP sensor Does the stock L99 have a single bar MAP sensor that needs changed out if going with forced induction?

09-07-2009, 12:13 AM	#2
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,973 View My Garage	Do you mean MAF Mass Air Flow?... and what exactly do you mean by forced induction? Blower or CAI __________________

09-07-2009, 12:35 AM	#4
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,973 View My Garage	OK... got it... I've heard of some replacing the MAF with aftermarket MAP. Not sure if there is a stock MAP sensor someplace else. __________________ Last edited by mlee; 09-07-2009 at 12:53 AM.

09-07-2009, 08:19 AM	#6
vsgls1 Drives: 07 GMC Sierra Join Date: Oct 2008 Location: Palm Bay, FL Posts: 421	I thought the LS3 was 1.5 Bar, not sure on the L99. __________________ Keith 2SS/RS MN6 in CGM. Delivered 6/22/09. Blown 7/29/09. Sold 12/6/10. 07 GMC Sierra

09-07-2009, 08:31 AM	#7
pharmd Master of Medicine Drives: 4th Gen Join Date: Oct 2008 Location: Kentucky Posts: 784	Yes, you need to replace it (if you are L99 for sure, I can only comment on that)...I got rid of my 1 bar and added a 2 bar...my tuner said it would have been cool if they would have come with the ZR1 style 3 bar, but oh well. __________________ 2002 Camaro SS. 408 LS2. 500+RWHP/480RWTQ. Full UMI RR suspension. Koni/Strano. 295F/315R. 3500#(55/45)

09-07-2009, 12:25 AM	#3
general23cmp Drives: 2010 RS SS Join Date: Aug 2009 Location: Huntsville, AL Posts: 196	No, I mean MAP...Manifold Absolute Pressure. Typically LS engines have a 1 bar meaning they measure from full vacuum to atmospheric. A Supercharged Cobalt, for example, has like a 2 bar one to measure boost. many people, when tuning, decide to go without the MAF totally, and just use the MAP sensor for air estimates. Let's say a turbocharger for sake of discussion....a Maggie might have that built-in.

09-07-2009, 12:52 AM	#5
general23cmp Drives: 2010 RS SS Join Date: Aug 2009 Location: Huntsville, AL Posts: 196	Well, I suspect it has both a MAF and a MAP from the factory.....The LS1 engines did. It's just that some folks do not MAF sensors and use the MAP solely. I was just wondering if it needs swapped out for a boosted engine for the programming to work right.

09-07-2009, 10:19 PM	#10
Kilo-9 Dog Is My Copilot Drives: 2011 2SS/RS LS3 Join Date: Jun 2009 Location: Pittsburgh, PA Posts: 1,394	gmpartsdirect online catalog shows these part numbers for the ZR-1: pressure sensor, baro 12591290 pressure sensor, inlet 12592525 pressure sensor, outlet 12592525 Please VERIFY these numbers before ordering. __________________

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