Boost & AFR - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Craig B · 01-17-2015, 07:47 PM

What's a safe AFR to shoot for with meth and 92 pump gas? If anyone could recommend a good AFR wide band gauge? Think I'm going to pick one up. Thanks.

Bo White · 01-17-2015, 08:14 PM

I like my AEM wideband.

Unreal · 01-17-2015, 08:41 PM

AEM, innovative.

AFR, depends on timing, compression, etc. Anywhere from 10.5-11.5 IMO, depending a lot on how much meth and how reliant on meth you want it.

Craig B · 01-18-2015, 06:58 AM

Thanks for the info. After some reading, thinking a 11:1 is a safe A/F with pump.

Unreal · 01-18-2015, 07:46 AM

11:1 is safe, but what is it off meth. One thing to look at is if the meth fails what is it? How much meth are you spraying? Is that 11:1 on meth and 11.5:1 off, or 12:1 off? Or is that 11:1 off meth and 10.5 or richer on meth?

I like to run them ~10.8-10.9 on meth, then 11.5 off meth if possible on a basic setup, that way if the meth isn't working, no big deal, isn't lean.

stevieturbo · 01-18-2015, 04:20 PM

And you dont say whether 5psi or 50psi.

At low boost even 11.0:1 AFR is very rich, even more so with meth

Craig B · 01-18-2015, 04:28 PM

Quote:

Originally Posted by stevieturbo

And you dont say whether 5psi or 50psi.

At low boost even 11.0:1 AFR is very rich, even more so with meth

Sorry, it made 10.8 Lb. of boost.

stevieturbo · 01-18-2015, 04:31 PM

Even at that sort of boost I'd have no issue going to high 11's. Maybe even pushing low 12's with the meth

Certainly no need to run as rich as 11 flat though

camarossdusk · 01-18-2015, 05:26 PM

I have the aem wide/band boost gauge, and love it. im running 91/meth combo and still in the 11.4-11.5 range with single nozzle meth setup, no issues running 12/13 lbs of boost.

Craig B · 01-19-2015, 05:44 PM

Anyone using the NGK 91101 or the newer 96604? Looking at getting one of them.

ModBargains.com · 01-19-2015, 05:59 PM

Quote:

Originally Posted by Bo White

I like my AEM wideband.

Ditto. Matched that with a Autometer boost gauge. They've got so many styles it's crazy, at least one line up/style from Autometer will work with your project.

Wayniez · 01-24-2015, 08:19 AM

This is my first LS, as well as power adder build and I have a question about boost gauges. I'm using Auto Meter Ultra lite II gauges in my 69 Camaro. Do I need a gauge with boost and vacuum or just boost or does it even make a difference? Max on boost down the road would be less than 12 psi. Mechanical or electric?
Thanks.

stevieturbo · 01-24-2015, 12:09 PM

Quote:

Originally Posted by Wayniez

This is my first LS, as well as power adder build and I have a question about boost gauges. I'm using Auto Meter Ultra lite II gauges in my 69 Camaro. Do I need a gauge with boost and vacuum or just boost or does it even make a difference? Max on boost down the road would be less than 12 psi. Mechanical or electric?
Thanks.

Really it's entirely down to you.

I see no reason not to have vacuum though. And up to you whether mechanical or electric is preferred.

Sometimes mechanical is good for its simplicity

Wayniez · 01-24-2015, 12:28 PM

Neither is better or more accurate Elec. or Mech.?

01-17-2015, 07:47 PM	#1
Craig B Drives: 2013 1LE Join Date: May 2013 Location: NJ Posts: 685	Boost & AFR What's a safe AFR to shoot for with meth and 92 pump gas? If anyone could recommend a good AFR wide band gauge? Think I'm going to pick one up. Thanks.

01-17-2015, 08:14 PM	#2
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	I like my AEM wideband. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

01-17-2015, 08:41 PM	#3
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	AEM, innovative. AFR, depends on timing, compression, etc. Anywhere from 10.5-11.5 IMO, depending a lot on how much meth and how reliant on meth you want it. __________________ Nick Corvette Z06 -1200ish rwhp

01-18-2015, 07:46 AM	#5
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	11:1 is safe, but what is it off meth. One thing to look at is if the meth fails what is it? How much meth are you spraying? Is that 11:1 on meth and 11.5:1 off, or 12:1 off? Or is that 11:1 off meth and 10.5 or richer on meth? I like to run them ~10.8-10.9 on meth, then 11.5 off meth if possible on a basic setup, that way if the meth isn't working, no big deal, isn't lean. __________________ Nick Corvette Z06 -1200ish rwhp

01-18-2015, 05:26 PM	#9
camarossdusk whippled 5th gen Drives: 2013 camaro ss Join Date: Jun 2013 Location: West Texas Posts: 442 View My Garage	I have the aem wide/band boost gauge, and love it. im running 91/meth combo and still in the 11.4-11.5 range with single nozzle meth setup, no issues running 12/13 lbs of boost. __________________ Whipple running 13 lbs of boost, Innovators west 8 rib with 10 percent over drive crankshaft pulley. Fore level 2 Dual pump fuel system, with duel TI auto fuel pumps, ID 1300 fuel injectors, tuned on e85. Driveshaft shop aluminum driveshaft, 1400 hp half shafts, Detroit tru-trac. ls9 camshaft, CNC ported heads, with trunion and dual valve spring upgrade, LS9 head gaskets, ARP 2000 head studs, Manley stainless valves. Adjustable Bmr toe rods, trailing arms, rear adjustable sway bar, full cradle bushings, upper control arm bushings, BMR diff. bushings, bmr driveshaft safety loop.

01-18-2015, 06:58 AM	#4
Craig B Drives: 2013 1LE Join Date: May 2013 Location: NJ Posts: 685	Thanks for the info. After some reading, thinking a 11:1 is a safe A/F with pump.

01-18-2015, 04:20 PM	#6
stevieturbo Drives: it changes Join Date: Nov 2010 Location: Norn Iron Posts: 1,126	And you dont say whether 5psi or 50psi. At low boost even 11.0:1 AFR is very rich, even more so with meth

01-18-2015, 04:31 PM	#8
stevieturbo Drives: it changes Join Date: Nov 2010 Location: Norn Iron Posts: 1,126	Even at that sort of boost I'd have no issue going to high 11's. Maybe even pushing low 12's with the meth Certainly no need to run as rich as 11 flat though

01-19-2015, 05:44 PM	#10
Craig B Drives: 2013 1LE Join Date: May 2013 Location: NJ Posts: 685	Anyone using the NGK 91101 or the newer 96604? Looking at getting one of them.

01-24-2015, 08:19 AM	#12
Wayniez Drives: 69 Camaro with LSA Join Date: Oct 2014 Location: Se Ma. Posts: 117	This is my first LS, as well as power adder build and I have a question about boost gauges. I'm using Auto Meter Ultra lite II gauges in my 69 Camaro. Do I need a gauge with boost and vacuum or just boost or does it even make a difference? Max on boost down the road would be less than 12 psi. Mechanical or electric? Thanks. __________________ 69 SS/RS Camaro complete frame off new sheet metal. DSE mini tubs, frame connectors, tubular control arms. Ride Tech 4 link with coil overs and Chassis Works Fab 9. C6 Z51 Corvette brakes. GM crate LSA/4l85 crate drivetrain. http://www.lateral-g.net/forums/showthread.php4?t=17217

01-24-2015, 12:28 PM	#14
Wayniez Drives: 69 Camaro with LSA Join Date: Oct 2014 Location: Se Ma. Posts: 117	Neither is better or more accurate Elec. or Mech.? __________________ 69 SS/RS Camaro complete frame off new sheet metal. DSE mini tubs, frame connectors, tubular control arms. Ride Tech 4 link with coil overs and Chassis Works Fab 9. C6 Z51 Corvette brakes. GM crate LSA/4l85 crate drivetrain. http://www.lateral-g.net/forums/showthread.php4?t=17217