LS VVT with non electric trans?

[encasedmetal]

finding conflicting opinions on if I can retain VVT with my SM465 manual transmission. I've seen where 5th camaros have swapped to a manual trans with their L99 engines which come with vvt so wouldn't that indicate that it'd work for me too? this is concerning a L96 motor I have for my 85'

[Hart_Rod]

Originally Posted by encasedmetal

finding conflicting opinions on if I can retain VVT with my SM465 manual transmission. I've seen where 5th camaros have swapped to a manual trans with their L99 engines which come with vvt so wouldn't that indicate that it'd work for me too? this is concerning a L96 motor I have for my 85'

They could have turned the VVT off in the tune. I know the LS3s that come stock in the Camaros with T56s don't have VVT or AFM.

[encasedmetal]

Originally Posted by Hart_Rod

They could have turned the VVT off in the tune. I know the LS3s that come stock in the Camaros with T56s don't have VVT or AFM.

You can't simply turn VVT off however. you have to use a VVT delete kit which includes a different valve cover, different cam gear, and 3 bolt cam.

[Hart_Rod]

Originally Posted by encasedmetal

You can't simply turn VVT off however. you have to use a VVT delete kit which includes a different valve cover, different cam gear, and 3 bolt cam.

Yes you can. Here's the table that you can use in HPTuners to do it.

[encasedmetal]

Originally Posted by Hart_Rod

Yes you can. Here's the table that you can use in HPTuners to do it.

and so the vvt cam gear holds the cam in what position when you turn off the vvt in the tune? see what i'm saying?

[Hart_Rod]

Originally Posted by encasedmetal

and so the vvt cam gear holds the cam in what position when you turn off the vvt in the tune? see what i'm saying?

0 base time, TDC, as if you had a 3 bolt cam.

[Hart_Rod]

A couple of threads I've found.

http://www.camaro5.com/forums/showthread.php?t=346704

http://www.camaro5.com/forums/showthread.php?t=346749

http://www.camaro5.com/forums/showthread.php?t=391775

[Matt Cramer]

Supposedly the reason the AFM isn't used with a manual is that it is hard to engage smoothly.

I see no reason that you couldn't use VVT with a manual transmission, however - we've successfully used it on other engine types when backed with a manual transmission. (Whether GM ECUs will support this combination or throw an error, I'm not sure.)

[rwhite692]

Interested in this thread as well, I will be soon be putting an L96 with VVT in front of my SM465 4-speed in my 72 Blazer rock crawler.

I really would like to just keep the VVT active (my tuner says he will disable the DOD, in the tune). This engine will have PLENTY of power for my application, and I have no interest in swapping the cam, deleting VVT...This engine is fresh out of a wrecked 2015 van, with 40K miles on it.

I will use the E38 ECM.

Question I have is, does the ECM need to receive a VSS signal, for any reason, including the VVT functionality?

And if it does in fact need it, what is the best way to get a VSS signal to the ECM, when running an old-school manual transmission, as I am doing?

I already have an autometer speedo with GPS in the truck, so, I don't need the VSS for operating a speedometer, but I am wondering if the ECM really needs a VSS signal?

[BR3W CITY]

Yes, you can disable VVT on an E38 with the tune only. For it to be deleted, then the actual parts need to be changed.

The e38 runs a separate TCM and can be used for just engine control, but you will lose control of things like DFCO, which uses the speed to control the decel fuel cutoff. They aren't crucial, but they can be nice to have for the sake of driveability.

[rwhite692]

Originally Posted by BR3W CITY

Yes, you can disable VVT on an E38 with the tune only. For it to be deleted, then the actual parts need to be changed.

The e38 runs a separate TCM and can be used for just engine control, but you will lose control of things like DFCO, which uses the speed to control the decel fuel cutoff. They aren't crucial, but they can be nice to have for the sake of driveability.

Thanks....Again, I don't want to disable or delete VVT....

I won't have a TCM, as I am running a SM465 manual trans. So if the E38 ECM needs a VSS signal, what is the best way to get the required signal? I am thinking one of the sensors/encoders (made by Painless and a couple of others) that screws into the mechanical speedo drive on my transfer case....?

[rwhite692]

I am thinking that the E38 ECM will be happy with getting a VSS signal from this unit from Dakota Digital...

[Hart_Rod]

Originally Posted by rwhite692

I am thinking that the E38 ECM will be happy with getting a VSS signal from this unit from Dakota Digital...

I have one of those for sale here if you need it:

http://67-72chevytrucks.com/vboard/s...d.php?t=696560

[rwhite692]

Sold! PM Sent!

[Hart_Rod]

Originally Posted by rwhite692

Sold! PM Sent!

PM sent

[BR3W CITY]

I love it when a problem presents its solution within-thread, another win for the community.