street/strip engine question

richie 2 · 12-16-2020, 07:54 AM

hope you's dont mind me in this section. very healthy 496ci/auto, 67 chevelle. holley hp 950 carb. need to determine lean/rich conditions with 8'' of vacume @ idle. egt probes/system in the headers? tks a bunch for any suggestions.

Glenn Briglio · 12-16-2020, 07:58 AM

Quote:

Originally Posted by richie 2

hope you's dont mind me in this section. very healthy 496ci/auto, 67 chevelle. need to determine lean/rich conditions with 8'' of vacume @ idle. egt probe/system in the headers? tks a bunch for any suggestions.

Put an O2 sensor and data logger in it.

richie 2 · 12-16-2020, 08:01 AM

tks glen, who makes that system?

jmcarter · 12-16-2020, 09:08 AM

Call him, you won’t be sorry...

http://www.motorsportsinnovations.com/

Mark Ruset · 12-16-2020, 11:08 AM

Here is another option for an monitoring air /fuel ratio:
http://www.daytona-sensors.com/wego-...-displays.html
easy to install and has many options

Dave Noll · 12-16-2020, 06:23 PM

Ive used an Autometer wideband gauge and O2 sensor in my truck to get a tune out of it. Works great.

slick5861 · 12-27-2020, 09:34 PM

Do you have a power valve in the carb or is it blocked off ?

richie 2 · 12-27-2020, 09:49 PM

950 holley HP. nice carb..... 3.5 pv, timing @ 18 inital/35 total. (pump gas)

slick5861 · 12-27-2020, 09:57 PM

You said 8 inches of vacuum at idle. Was the car in drive or in park when checked ? I always adjust the carb, idle mixture vacuum etc. in drive. Being in park raises the rpm and vacuum readings. Just checking because if overlooked it will not be an optimized setting of the carb. Good luck.

12-16-2020, 07:54 AM	#1
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 418 Liked 200 Times in 91 Posts	street/strip engine question hope you's dont mind me in this section. very healthy 496ci/auto, 67 chevelle. holley hp 950 carb. need to determine lean/rich conditions with 8'' of vacume @ idle. egt probes/system in the headers? tks a bunch for any suggestions. Last edited by richie 2; 12-16-2020 at 08:04 AM.

12-16-2020, 08:01 AM	#3
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 418 Liked 200 Times in 91 Posts	Re: street/strip engine question tks glen, who makes that system?

12-16-2020, 09:08 AM	#4
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,284 Likes: 2,337 Liked 3,126 Times in 962 Posts	Re: street/strip engine question Call him, you won’t be sorry... http://www.motorsportsinnovations.com/ __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table

12-16-2020, 11:08 AM	#5
Mark Ruset Member Join Date: May 2006 Location: Southwest Florida Posts: 263 Likes: 35 Liked 43 Times in 29 Posts	Re: street/strip engine question Here is another option for an monitoring air /fuel ratio: http://www.daytona-sensors.com/wego-...-displays.html easy to install and has many options __________________ Mark Ruset 2048 STK

12-16-2020, 06:23 PM	#6
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 709 Likes: 2,641 Liked 238 Times in 111 Posts	Re: street/strip engine question Ive used an Autometer wideband gauge and O2 sensor in my truck to get a tune out of it. Works great. __________________ Dave Noll, EF/S ,?/SA 6526

12-27-2020, 09:34 PM	#7
slick5861 Junior Member Join Date: Sep 2008 Location: East St Paul,Manitoba Canada Posts: 23 Likes: 14 Liked 2 Times in 2 Posts	Re: street/strip engine question Do you have a power valve in the carb or is it blocked off ?

12-27-2020, 09:49 PM	#8
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 418 Liked 200 Times in 91 Posts	Re: street/strip engine question 950 holley HP. nice carb..... 3.5 pv, timing @ 18 inital/35 total. (pump gas) Last edited by richie 2; 12-28-2020 at 09:56 AM.

12-27-2020, 09:57 PM	#9
slick5861 Junior Member Join Date: Sep 2008 Location: East St Paul,Manitoba Canada Posts: 23 Likes: 14 Liked 2 Times in 2 Posts	Re: street/strip engine question You said 8 inches of vacuum at idle. Was the car in drive or in park when checked ? I always adjust the carb, idle mixture vacuum etc. in drive. Being in park raises the rpm and vacuum readings. Just checking because if overlooked it will not be an optimized setting of the carb. Good luck.