Which engine to look for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C20-67_N_MO · 01-07-2011, 05:54 PM

Looking for one of the LSx engine family that support the V-8 to V-4 cylinder cut out function.

So my question is what year and model vehicle would these engines orginally come equiped with? Hoping these would be the 6.0 liter engines for performance for my heavy 4x4 and then on the highway be able to go into economy mode for fuel saving mode.

Thanks for your help in this matter.

matthew20061 · 01-08-2011, 06:33 AM

I believe it came on the 2007+ new bod style trucks. It's Active Fuel Management (AFM) but I'm not sure how or if it would work well in a swap into an old truck because I'm guessing the trucks BCM might control the system but I'm really not sure.

C20-67_N_MO · 01-08-2011, 08:11 AM

Quote:

Originally Posted by matthew20061

I believe it came on the 2007+ new bod style trucks. It's Active Fuel Management (AFM) but I'm not sure how or if it would work well in a swap into an old truck because I'm guessing the trucks BCM might control the system but I'm really not sure.

At least that's a start.

Not sure what the BCM is suppose to be but pretty sure that any function can be programmed in or out that is not needed. But still have the system work as intended.

Looking at long term project so planning now.

Thanks.

usmcchevy · 01-09-2011, 12:35 PM

Keeping the AFM with a engine swap has been done on the board....just can't find them at the moment. Heres a link to another place that will have delt with AFM in swaps. Just might need to search for a bit because most seem to eliminate it.

http://www.ls1tech.com/forums/conversions-hybrids-28/

Oh and BCM= Body Control Module

C20-67_N_MO · 01-09-2011, 03:06 PM

Cool Thank you.

Will have to become a member there and check things out.

dan76 · 01-09-2011, 03:51 PM

I had an 08 Sub with the displacement on demand system and found the slightest grade, use of the A/C or engaging 4WD would instantly disengage the system. As a result I did not see a fuel economy increase attributed to it's use. It sounds great in theory but I didn't experience a benefit. Perhaps during periods of extended idling it would improve fuel mileage.

01-07-2011, 05:54 PM	#1
C20-67_N_MO Champagne Taste on Beer Budget Join Date: Dec 2008 Location: High Ridge, Missouri Posts: 2,190	Which engine to look for? Looking for one of the LSx engine family that support the V-8 to V-4 cylinder cut out function. So my question is what year and model vehicle would these engines orginally come equiped with? Hoping these would be the 6.0 liter engines for performance for my heavy 4x4 and then on the highway be able to go into economy mode for fuel saving mode. Thanks for your help in this matter. __________________ Coming Soon: Project 1970 Country Truck

01-08-2011, 06:33 AM	#2
matthew20061 69' Chevy Stepside Join Date: Mar 2008 Location: Anchorage, Ak Posts: 526	Re: Which engine to look for? I believe it came on the 2007+ new bod style trucks. It's Active Fuel Management (AFM) but I'm not sure how or if it would work well in a swap into an old truck because I'm guessing the trucks BCM might control the system but I'm really not sure. __________________ -Matthew -69' Chevy Custom/10 Shortbed Stepside 2WD "Copperhead" - Restored, 6.0L LQ9 Built. L92 Heads and LS3 Intake with Comp Cam 223/231 .610/.617 112 LSA, 4L60E with Shift Kit and Circle-D 3200 Stall Converter ~Build Thread -1957 Chevy BelAir 2 Door Post Sedan, Full Frame off Restoration done myself - 6.0L with T56 six speed -1957 Chevy BelAir 2 Door Post Sedan - Nearly rust free AK car, Project in the waiting -2003' Chevy Silverado SS AWD 6.0L! - Daily Driver

01-09-2011, 12:35 PM	#4
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: Which engine to look for? Keeping the AFM with a engine swap has been done on the board....just can't find them at the moment. Heres a link to another place that will have delt with AFM in swaps. Just might need to search for a bit because most seem to eliminate it. http://www.ls1tech.com/forums/conversions-hybrids-28/ Oh and BCM= Body Control Module __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index Last edited by usmcchevy; 01-09-2011 at 12:36 PM.

01-09-2011, 03:06 PM	#5
C20-67_N_MO Champagne Taste on Beer Budget Join Date: Dec 2008 Location: High Ridge, Missouri Posts: 2,190	Re: Which engine to look for? Cool Thank you. Will have to become a member there and check things out. __________________ Coming Soon: Project 1970 Country Truck

01-09-2011, 03:51 PM	#6
dan76 Registered User Join Date: Mar 2008 Location: Salt Lake City UT Posts: 441	Re: Which engine to look for? I had an 08 Sub with the displacement on demand system and found the slightest grade, use of the A/C or engaging 4WD would instantly disengage the system. As a result I did not see a fuel economy increase attributed to it's use. It sounds great in theory but I didn't experience a benefit. Perhaps during periods of extended idling it would improve fuel mileage.

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