VVT - Disable in tune only?
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
VVT - Disable in tune only? Have read probably every post here regarding VVT, but haven't found an answer...
Engine is a 2015 L96 6.0 with VVT (NO AFM).
It is going into my 72 blazer (rock crawler) in front of an SM465 4-speed manual (Hence, the need to deactivate VVT)
Question: If I just de-activate the VVT in the tune, will the engine still run well?
I understand I will lose the benefits of the VVT, but should I expect any problems, deactivating the VVT in the tune, and just running the engine as-is?
Sometime down the road, I plan to do a VVT delete on the engine, cam/lifter swap, etc, but for now, I just want to run the engine in its stock configuration, and get my truck back in action... This engine has plenty of power, stock, for what I am doing.
Thanks
Rob
Engine is a 2015 L96 6.0 with VVT (NO AFM).
It is going into my 72 blazer (rock crawler) in front of an SM465 4-speed manual (Hence, the need to deactivate VVT)
Question: If I just de-activate the VVT in the tune, will the engine still run well?
I understand I will lose the benefits of the VVT, but should I expect any problems, deactivating the VVT in the tune, and just running the engine as-is?
Sometime down the road, I plan to do a VVT delete on the engine, cam/lifter swap, etc, but for now, I just want to run the engine in its stock configuration, and get my truck back in action... This engine has plenty of power, stock, for what I am doing.
Thanks
Rob
Last edited by rwhite692; Aug 30, 2016 at 02:46 PM.
Perhaps not too many people have done what you are asking. For example the only time I have ever set the VVT cam parameter from one to none from is when someone has actually eliminated all the VVT hardware. No one has ever asked me to set it to none with all the VVT hardware still in place so I can't tell you what it does.
Trending Topics
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
Perhaps not too many people have done what you are asking. For example the only time I have ever set the VVT cam parameter from one to none from is when someone has actually eliminated all the VVT hardware. No one has ever asked me to set it to none with all the VVT hardware still in place so I can't tell you what it does.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
We tune a lot of swaps but all of the VVT motors the shops or customers have deleted it before doing the swap. It's much easier to delete it sitting on the engine stand than once its in the vehicle. Not saying it wont work just turning it off in the tune, its just not the norm for sure.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
We tune a lot of swaps but all of the VVT motors the shops or customers have deleted it before doing the swap. It's much easier to delete it sitting on the engine stand than once its in the vehicle. Not saying it wont work just turning it off in the tune, its just not the norm for sure.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
The other reason I'm kind of leery of doing a cam swap, is because I want to maintain low rpm torque; all the cams I am seeing for the LS are more suited to street car applications, ie building power higher up in the RPM range, where I simply won't be running... My truck is geared very low (final drive ratio is 54:1 in first) for climbing, etc. Most of the time, on the trail, I am turning like 1,200 RPM.
I'd hate to go and do the cam swap, and then actually be worse off...
I guess I could swap in a stock 6.0 (non-VVT) cam.
But what if the VVT cam, in the motor now, with VVT deactivated in the tune, is already the equivalent of running a stock non-VVT cam?
It would then be a complete waste of time to do all of that work...
I guess I'm trying to figure out why you would turn off VVT on a stock setup? There are no upsides to turning off VVT but plenty of downsides. Not sure what having a manual transmission has to do with the need to disable VVT.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
VVT won't function without the ECM receiving inputs (among them, engine load) from the transmission control module.
I have no TCM, as I am running an SM465 (manual) transmission.
On The Tree
Joined: Sep 2007
Posts: 196
Likes: 0
We've setup a few tunes here in shop for VVT and manual trans applications. We always warn against it just because we aren't sure if it will ever work. But we've setup a few that way. I've had one guy call back and say everything is working fine. I asked about whether VVT was working and he said he never checked. However, he did say the vehicle was running fine and sounded normal. So I still can't say for certain but I would enable VVT functionality in a manual tune file and go from there.
The ECM calculates engine load and I've never seen VVT not function before with manual transmission swaps. Granted I've only tuned a few swaps like that but none of them had any problems with VVT functioning correctly.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
After I get the engine up and running, I plan to experiment with it activated/deactivated, in the tune.
Thread Starter
Teching In
Joined: Aug 2016
Posts: 19
Likes: 0
We've setup a few tunes here in shop for VVT and manual trans applications. We always warn against it just because we aren't sure if it will ever work. But we've setup a few that way. I've had one guy call back and say everything is working fine. I asked about whether VVT was working and he said he never checked. However, he did say the vehicle was running fine and sounded normal. So I still can't say for certain but I would enable VVT functionality in a manual tune file and go from there.
