New Info - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**TR65** · 01-23-2014, 10:26 PM

I really like my scan gauge. I use it for the digital speedo, a very accurate fuel level gauge, temp gauge, and tach. Of course you can see any gauge you want like the average fuel economy in the picture. You can calibrate it very accurately over time. The 17.8 mpg is correct.

TR

Andy4639 · 01-23-2014, 11:56 PM

Quote:

Originally Posted by TR65

I really like my scan gauge. I use it for the digital speedo, a very accurate fuel level gauge, temp gauge, and tach. Of course you can see any gauge you want like the average fuel economy in the picture. You can calibrate it very accurately over time. The 17.8 mpg is correct.

TR

Yes I bought one the other day. It looks nice and looks to have a bunch of promise for the LSx motor info. I will have my factory gauges also but it will be nice to compare the 2 and see how they match up to one another.

BR3W CITY · 01-24-2014, 02:46 AM

Handheld tuners arent' the same thing....and most handheld tuners are really only useful on certain vehicles. When I had late model chryslers', you had to have one for the srt4/8s that we did, but since working with late model GM efi, there just isn't a replacement for HPT. Buy a scanguage, save the rest of the money.

Houston Ben · 01-30-2014, 10:52 AM

I just bought the Scan gauge II, it is nice but unfortunately it is telling me I am only getting 14-15 mpg at 70mph

BR3W CITY · 01-30-2014, 02:42 PM

It uses injector pulse to guess that, assuming you calibrated the tank and fillup system, that still might be off. The mpg calc isn't really that great, tho I find its usually as accurate as the lie-o-meter that comes on cars these days.

That being said, I don't think thats terrible for hurling a brick into the wind.

68GMCCustom · 01-30-2014, 04:29 PM

even with these bricks....rpm at cruise still makes a huge difference in mpg. If you want the big mpg numbers...your cruise rpm needs to be at or below 2k rpm...every 100 rpm's or so above that is dropping the mpg that much more. the lower the better (to a degree).

My TBSS with 4.10's is running like 2200-2300 rpm at 70mph and 2500 rpm at 80mph (IIRC)....and it rarely gets better then 17mpg. I had a bigger/heavier 6.0L full time AWD, 2001 Sierra C3 that got better mpg's with its 3.73's.

BR3W CITY · 01-30-2014, 09:06 PM

^ see mine's all wacky because I have a 3:73 and turn the same RPM's roughly (4l80e), and I can get 17-19 give or take freeway (but I also have those steel 12" wide wheels in back)

68GMCCustom · 01-31-2014, 05:56 PM

well I rechecked and I was off on the rpm's.....70mph is closer to 2500rpm with the 4.10's.
tire height makes a difference too.

is there a difference in an 80e's OD ratio and a 60e's? seems they are close...like .05 or .10 difference or so. can't remember.

Andy4639 · 01-31-2014, 08:03 PM

Quote:

Originally Posted by 68GMCCustom

well I rechecked and I was off on the rpm's.....70mph is closer to 2500rpm with the 4.10's.
tire height makes a difference too.

is there a difference in an 80e's OD ratio and a 60e's? seems they are close...like .05 or .10 difference or so. can't remember.

That sounds more like it. Mine is 4:10 gears with the 20" tires and driving it to Greenville last Saturday was about 2500-2600 per the scan gauge. My regular tach want be right until the tuner gets his hands on it.

Custom 68 · 02-01-2014, 03:23 PM

Just flip the switch on the back to "4 cyl" mode and all fixed on your tach...

Andy4639 · 02-01-2014, 07:19 PM

Quote:

Originally Posted by Custom 68

Just flip the switch on the back to "4 cyl" mode and all fixed on your tach...

Nope, not that easy on the Speed Hut gauges!

Andy4639 · 02-02-2014, 08:16 PM

Played with the scan gauge today. I got it to take the transmission codes and it saved it but it has no signal showing!

Can are will the computer tunner be able to turn this on in the computer when he does the tune? I was told the 4l80e should have the signal in the computer in a stock setup which I realize mine isn't.
Anyone have any thoughts on this? I sure would like to have a temp reading on the trans.

smartass12 · 02-05-2014, 10:39 AM

Quote:

Originally Posted by BR3W CITY

Mine is 50% of my dash. I use it for a speedo, temp, oil temp and voltage gauges. Works simple, and color matched the other blue interior lights that I had.

Take a look through my build again, or take a look at the Truck Light Test video on my YT channel to see it litup/working.

Lights Test in the 66 C10 - REV J HD - YouTube

Did you have an issue with it connecting? My port might be wired wrong because as soon as i plug it in (without the ignition on it) It starts to try to connect but fails. I believe it should only turn on with the ignition.

Andy4639 · 02-05-2014, 04:36 PM

Mine only comes on after cranking it up. It works fine just no signal from computer n the transmission.

01-23-2014, 10:26 PM	#26
TR65 Senior Member Join Date: Nov 2007 Location: Greenville, SC Posts: 873	Re: New Info I really like my scan gauge. I use it for the digital speedo, a very accurate fuel level gauge, temp gauge, and tach. Of course you can see any gauge you want like the average fuel economy in the picture. You can calibrate it very accurately over time. The 17.8 mpg is correct. TR Attached Images __________________ 1965 C10 SWB Fleet Two owner LS2 Swap Thread http://67-72chevytrucks.com/vboard/s...d.php?t=413880

01-24-2014, 02:46 AM	#28
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: New Info Handheld tuners arent' the same thing....and most handheld tuners are really only useful on certain vehicles. When I had late model chryslers', you had to have one for the srt4/8s that we did, but since working with late model GM efi, there just isn't a replacement for HPT. Buy a scanguage, save the rest of the money. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-30-2014, 10:52 AM	#29
Houston Ben Registered User Join Date: May 2013 Location: Houston Texas Posts: 713	Re: New Info I just bought the Scan gauge II, it is nice but unfortunately it is telling me I am only getting 14-15 mpg at 70mph

01-30-2014, 02:42 PM	#30
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: New Info It uses injector pulse to guess that, assuming you calibrated the tank and fillup system, that still might be off. The mpg calc isn't really that great, tho I find its usually as accurate as the lie-o-meter that comes on cars these days. That being said, I don't think thats terrible for hurling a brick into the wind. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-30-2014, 04:29 PM	#31
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: New Info even with these bricks....rpm at cruise still makes a huge difference in mpg. If you want the big mpg numbers...your cruise rpm needs to be at or below 2k rpm...every 100 rpm's or so above that is dropping the mpg that much more. the lower the better (to a degree). My TBSS with 4.10's is running like 2200-2300 rpm at 70mph and 2500 rpm at 80mph (IIRC)....and it rarely gets better then 17mpg. I had a bigger/heavier 6.0L full time AWD, 2001 Sierra C3 that got better mpg's with its 3.73's. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

01-30-2014, 09:06 PM	#32
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: New Info ^ see mine's all wacky because I have a 3:73 and turn the same RPM's roughly (4l80e), and I can get 17-19 give or take freeway (but I also have those steel 12" wide wheels in back) __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-31-2014, 05:56 PM	#33
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: New Info well I rechecked and I was off on the rpm's.....70mph is closer to 2500rpm with the 4.10's. tire height makes a difference too. is there a difference in an 80e's OD ratio and a 60e's? seems they are close...like .05 or .10 difference or so. can't remember. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

02-01-2014, 03:23 PM	#35
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: New Info Just flip the switch on the back to "4 cyl" mode and all fixed on your tach... __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

02-02-2014, 08:16 PM	#37
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: New Info Played with the scan gauge today. I got it to take the transmission codes and it saved it but it has no signal showing! Can are will the computer tunner be able to turn this on in the computer when he does the tune? I was told the 4l80e should have the signal in the computer in a stock setup which I realize mine isn't. Anyone have any thoughts on this? I sure would like to have a temp reading on the trans. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-05-2014, 04:36 PM	#39
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: New Info Mine only comes on after cranking it up. It works fine just no signal from computer n the transmission. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

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