I saw this video Starts at 4:32.


This is pretty interesting. Looks like it might actually be able be retrofit onto older M8 engines.
This is way more simple that I expected.

 

yeah, not quite as complex as the turbo encabulator transmission anyway

 

My personal take/view on the oil issues, are that it wasn’t anything as bad as quite a few make it seem, especially many it didn’t happen to.

Plus it’s been 5 years. Some things are best left to be in the past.

This isn’t new or revolutionary, just an adaptation of a proven system, made to work with the V-twin.

If it can be retrofitted to all M8 engines, talk about having to crack open the engine. I would be down for it.

 

Anyways, back to the VVT system.
I'm curious if the VVT setup absolutely needs the new cooling system.
Removing those hoses up top would be nice for getting a more stripped down look to the bike on something like a Street Bob or LRS.
I wonder how long any of this will take to trickle down into Softails.

 

coolest thing about that is he made it all up on the fly

 

It can likely be retrofit, but not sure it'd be very cost effective as a retrofit.

I don't know many in the truck world that retrofit cam phasers to their non VVT trucks - pretty expensive when not built into initial engine assembly.

I haven't seen data how much more hp & tq this yields - my read on this is it's another industry response to EPA fuel economy and exhaust emission lowerings. Otherwise I'm unsure anybody'd pay for this extra stuff vs. more displacement.

 

A well designed vvt can be optimized to have the best of all worlds. Standard minimal overlap at low RPMs and low loads. Then duration and overlap is increased under higher rpm & load. Seems this design tries to accomplish this via oil pressure.

 

Yep, but the benefit has not been quantified against the cost and complexity and reliability.

I haven't heard too many VVT failures on cars except for those using cheap oil or not changing oil enough, because this is a hydraulic system with small rifles and orifices in a dirty engine oil environment. It's like having a automatic transmission valve body in your engine.

So - how much more power and fuel economy is provided by this add-on gizmo?

 

the VVT itself is amazing for making good power bands,,,,think Honda V-tech.

the after market performance world, ALWAYS uses phase lock outs, and reverts to static cam desgin

the GM versions of this, are garbage, but it is nt the VVT design therory, it is the use for EPA mandate mileage, that allows the oil to be directed away and not pump up the lifter, then the oil cokes and BLAM, failures occur.

this will make a solid engine run really well on both ends, but will most likely hinder upgrades or need to be retor'd back to the current style

 

It has been a while since I played, (went diesel) but since its inception into the GM LS engines, the cam phaser gets ditched for a standard cam when you want to play with HP. I looked hard at it for one of my trucks.

So, of all the options offered by the new CVO, the VVT is near the bottom for me. The cam would get tossed on day one.

I don't see it as being a problematic item for anybody, it has been out a long time, and I am sure Bosch or Lucas, or whoever they are sourcing the components from has it figured out by now.