Lowbuck LS Turbo Truck Project - 3 Bar MAP Sensor Install

[@nsogiba]

Great video. Thanks for showing step by step how you did things. I'm about to do this on my 2002 RCSB sloppy build.

[@LowbuckLS]

Glad you found it helpful, good luck on your project!

[@BullCitySpeed]

Dude...you're crushing it and leaving my hunk o junk in the dust. looks neat and tidy. AND great info on the MAP.

[@LowbuckLS]

Wow, thanks Ry... will wear my Bull City Speed shirt with pride in an upcoming episode. You’re crushing it too... interviewing Cletus on the podcast, getting your car ready for drag week, and doing the Clapd Out thing, you must be a busy man. Keep up the hard work and good luck at drag week.

[@chaseholsonbake5503]

Must be an instrument tech , our gear works great for this stuff👍

[@LowbuckLS]

Chase Holsonbake yes sir Journeyman Instrument Tech/Master Electrician here

[@cameronunkefer868]

I’ve really been thinking about turboing my lq9 these are very helpful!!!! It helped me Alot

[@slightlyboringgameplay]

This video has helped me a lot, I couldn't find info on this anywhere

[@silentbravo]

You should be able to mount that coolant overflow tank sideways in the same spot (turn it 90 degrees) and that will at least get it off the turbo. May require a different hose if that kinks the factory to much, or just snip the factory hose to work.

[@LowbuckLS]

Thanks silentbravo, I appreciate you’re input. Will try turn it sideways as you suggested. Thanks again for watching and commenting.

[@scottduke3607]

We love ya and your videos! U the man

[@payload88]

What size turbo are you running? I'm thinking about a small turbo and about 7psi on my suburban just for a little help when towing. Not particularly a race or high hp application. Also how much boost are you running?

[@LowbuckLS]

Michael Brown I’m running a 7875 turbo and currently running about 10lbs of boost but plan on cranking that up to 15lbs once I upgrade my fuel pump.

[@venomousproductions7539]

Under boost, does the stock map sensor stay in place?

[@bryanwhitehouse8662]

Thanks for the knowledge couple vids really came in handy! I did this swap and my boost gauge came with a map sensor as well you think it’ll be fine to tee and use the same vacuum line for both

[@LowbuckLS]

Bryan Whitehouse should be fine I would think

[@Griffsmechanical_stang]

Hey mate I’m having some trouble with my ls1 idling I have adjusted the tune it is surging and the idle is up and down I run a high rise manifold and it has no map sensor spot so I haven’t got it hooked up would that be my problem since I have no map sensor?

[@LowbuckLS]

4x4 life yes I would bet that is your problem, pretty important to have that MAP sensor reading for the computer to do its calculations correctly

[@georgiaboy1579]

My OS tab shows a blank page. Do I have to install the 3 bar MAP first then connect to the truck for it to recognize the 3 bar?

[@LowbuckLS]

Maybe there's already a custom OS installed on that ECM, go in to the VCM Editor, click on the "Edit" menu option at the top of the screen, click on "Calibration Details" and go to the "Controllers" tab. $ Item down should say "Operating System" see what it says there. You need to be starting with a stock OS to be able to install the 3 bar OS. IF some other OS is installed the OS tab will be blank like you are seeing.

[@georgiaboy1579]

@@LowbuckLS thanks Brother. As soon as I finish this Z71 transmission I will do just that.

[@georgiaboy1579]

@@LowbuckLS Did what you said and it says OS is 9381344. What now?

[@georgiaboy1579]

@@LowbuckLS I changed something to from basic to advanced and now it's allowing me to change to a 3 bar. Thank you for your help Brother

[@al7nfi]

thanks for you sir about yore great work

[@knighttime19]

Nice job.

[@davek556]

Good info 👍

[@LowbuckLS]

Thank you, and thanks for watching and taking the time to comment.

[@avatarstore]

installing a Fitech standalone ls efi on my 5.3 that I have in my 77 C10 (it came from a 2000 1500 Silverado) and the fitech comes with a 3 bar map sensor which won't fit into the factory spot, and they said to drill it out, and that would mean pieces falling into it, I have been all over youtube, and the internet to figure this out, on how to connect FItech's map sensor, and you resolve it, at least for now I have a way (I don't want to take off the intake to drill a hole for that sensor) and I hope there is another way ,,,, but i thank you 4 years youtube,, anyone has other ways - please I am open

[@altinademaj4376]

When we put a higher bar sensor car makes more boost(bar) or not

[@LowbuckLS]

Altin Ademaj the 3 bar map sensor just allows the engine computer to measure a higher level of boost it doesn’t create more boost, you would need to adjust your boost controller or wastegate spring to do that. The 3 bar map sensor is needed so the computer can measure the manifold pressure under boost and calculate how much fuel is needed to keep the air fuel ratio correct.

[@sharkcitywarrior5485]

So do you have to run an air intake temp sensor when running 3 bar ?

[@LowbuckLS]

SHARK CITY WARRIOR yes you still need an IAT sensor, the ECU uses that temperature for calculations. Up til this point I have been using the IAT sensor that is built in to the MAF sensor, but I’m getting rid of the MAF so I just bought a stand alone IAT sensor, will show how to install it in an upcoming video.