LS3 90mm Throttle Body Question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Shodown · 03-02-2019, 10:56 PM

I've read that a lot of guys like to swap to the LS3 90mm TB for better throttle response. Do you need an LS3 MAF sensor or will the stock LSA work?

DSMer1 · 03-02-2019, 11:08 PM

Keep the maf sensor your currently tuned on

DrkPhx · 03-02-2019, 11:30 PM

Stock MAF works fine but you will need a tune to adjust certain parameters.

d454brisson · 03-03-2019, 11:02 AM

I have run both a LS3 and Ported LS2 (for sale) out of the box with no tune changes. The Throttle response is definitely different. A touch quicker.

When I switched to the 102mm I had to change the scalar but that was it.

RobZL1 · 03-03-2019, 04:23 PM

Quote:

Originally Posted by d454brisson

I have run both a LS3 and Ported LS2 (for sale) out of the box with no tune changes. The Throttle response is definitely different. A touch quicker.

When I switched to the 102mm I had to change the scalar but that was it.

+1. You can just plug in the 90mm TB and go.

GoTopless · 03-03-2019, 07:49 PM

Ok might be a dumb question but?
I had a 2011 2ss that I had a vmax CNC ported TB. I took it off before they totaled the vehicle and installed the stock TB.
Are you saying I could take that Vmax CNC ported TB and just swap them out in my 2013 ZL1 and it would be fine or would I need to at that point have a tune to change the scalar.
Thanks

d454brisson · 03-03-2019, 09:52 PM

Should be fine, only have to update scalar if the diameter changes.

GoTopless · 03-05-2019, 04:35 PM

Well I installed the VMAX ported Throttle body from my 2011 2ss and it seems to work really good. I have the stock airbox but an AEM filter that I bought for my 11 but never used since I got a good deal on a Cold air Inductions intake.
Might be a crazy question but how would I know if I needed to adjust the scalar with a tune? Could I theoretically monitor it by the Throttle body air compensation % via a scanner? erratic idle?
Thanks for any help.

RobZL1 · 03-05-2019, 10:00 PM

You should be good without changing the scalar when changing from the 87 to the 90. There are several stock GM tunes with slightly different scalars for the 90mm throttle body, actually.

Shodown · 03-08-2019, 07:48 PM

Thanks, guys! Just waiting on the Roto Fab to show up so I can install everything all at once.

03-02-2019, 10:56 PM	#1
Shodown Drives: 2014 ZL1 Join Date: Jun 2009 Location: Tucson, AZ Posts: 314	LS3 90mm Throttle Body Question I've read that a lot of guys like to swap to the LS3 90mm TB for better throttle response. Do you need an LS3 MAF sensor or will the stock LSA work?

03-02-2019, 11:08 PM	#2
DSMer1 Drives: 14 and 15 SS's Join Date: Feb 2018 Location: Minneapolis, Minnesota Posts: 387	Keep the maf sensor your currently tuned on __________________ Bolt-ons!

03-05-2019, 10:00 PM	#9
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,281	You should be good without changing the scalar when changing from the 87 to the 90. There are several stock GM tunes with slightly different scalars for the 90mm throttle body, actually. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp Past Rides- 2014 ZL1 M6 Red Hot \| Tons of mods 2004 CTS-V M6 Silver \| Many mods 1995 Corvette M6 Torch Red \| A few more mods 1992 Camaro M5 White \| A few mods

03-02-2019, 11:30 PM	#3
DrkPhx Drives: 2013 Triple Black ZL1 / 2006 TB SS Join Date: Feb 2011 Location: MN Posts: 2,250	Stock MAF works fine but you will need a tune to adjust certain parameters.

03-03-2019, 11:02 AM	#4
d454brisson Drives: 2014 ZL1 Join Date: Jul 2016 Location: Baltimore MD Posts: 345	I have run both a LS3 and Ported LS2 (for sale) out of the box with no tune changes. The Throttle response is definitely different. A touch quicker. When I switched to the 102mm I had to change the scalar but that was it.

03-03-2019, 07:49 PM	#6
GoTopless Drives: 2013 Camaro ZL1 Convertible Join Date: Sep 2017 Location: midwest Posts: 44	Ok might be a dumb question but? I had a 2011 2ss that I had a vmax CNC ported TB. I took it off before they totaled the vehicle and installed the stock TB. Are you saying I could take that Vmax CNC ported TB and just swap them out in my 2013 ZL1 and it would be fine or would I need to at that point have a tune to change the scalar. Thanks

03-03-2019, 09:52 PM	#7
d454brisson Drives: 2014 ZL1 Join Date: Jul 2016 Location: Baltimore MD Posts: 345	Should be fine, only have to update scalar if the diameter changes.

03-05-2019, 04:35 PM	#8
GoTopless Drives: 2013 Camaro ZL1 Convertible Join Date: Sep 2017 Location: midwest Posts: 44	Well I installed the VMAX ported Throttle body from my 2011 2ss and it seems to work really good. I have the stock airbox but an AEM filter that I bought for my 11 but never used since I got a good deal on a Cold air Inductions intake. Might be a crazy question but how would I know if I needed to adjust the scalar with a tune? Could I theoretically monitor it by the Throttle body air compensation % via a scanner? erratic idle? Thanks for any help.

03-08-2019, 07:48 PM	#10
Shodown Drives: 2014 ZL1 Join Date: Jun 2009 Location: Tucson, AZ Posts: 314	Thanks, guys! Just waiting on the Roto Fab to show up so I can install everything all at once.