Jump to content


Photo
- - - - -

What would the interest be in a VVT&L system for an L series?


  • Please log in to reply
10 replies to this topic

#1 Mack

Mack

    Member

  • Members
  • PipPipPipPipPip
  • 771 posts
  • LocationMinneapolis, MN

Posted 09 July 2015 - 02:48 PM

I know this has probably been covered a thousand times before,  but I have an idea that would be easily retrofittable and could even be made 100% mechanical with no need for electronics what so ever. This system will essentially work on ANY non shaft mounted rocker arms (yes, SBC, SBF and mopar) Cost shouldn't be too bad, as there isnt much complexity or need for a whole slew of new parts.  Some minor modification to the cylinder head and valve cover, but other than that it should be a bolt in affair.  

 

I have spoken to an engineering firm about this and they seem to think it is feasible enough to at least warrant building a prototype.  I am also waiting to speak with their in house patent attorney about filing a provisional patent, at which time full details will be released.  It would essentially do what the intake side of the vq37hr VVEL system does, except a lot less complicated, and easily made to work on the exhaust side as well.  

 

So, any interest?


hey, check my website for pics of my free 280zx.

#2 Pac_Man

Pac_Man

    Always Here

  • Members
  • PipPipPipPip
  • 232 posts
  • LocationEverett, WA

Posted 10 July 2015 - 12:57 AM

I'm sure people would be interested, but I have seen a lot of good ideas where people are interested but they never get off the ground when it comes to people actually putting their money down on the table for it.

 

Definitely interested to see if this turns into something, though.



#3 TimZ

TimZ

    OG Member

  • Members
  • PipPipPipPipPipPipPip
  • 2345 posts
  • LocationDearborn, MI

Posted 11 July 2015 - 07:14 AM

I'm sure people would be interested, but I have seen a lot of good ideas where people are interested but they never get off the ground when it comes to people actually putting their money down on the table for it.

 

Definitely interested to see if this turns into something, though.

 

As long as the product announcement goes something like this I'm in!

 

In theory I could be interested, but it will come down a few factors - what will it cost, how much complexity does it add, is it tune-able, will it be reliable, how much benefit...


Posted Image

Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
-FZ, Joe's Garage

#4 noelawinslow

noelawinslow

    Regular

  • Members
  • PipPipPip
  • 70 posts
  • LocationSan Antonio, Texas

Posted 11 July 2015 - 03:15 PM

Yeah it'd really come down to cost vs benefit.

#5 Mack

Mack

    Member

  • Members
  • PipPipPipPipPip
  • 771 posts
  • LocationMinneapolis, MN

Posted 13 July 2015 - 03:10 AM

the benefits of it would be that if you had fine enough electronic control out of it, theoretically you could throttle the engine with it and run a 300 + degree "full race" cam and have all the power in between that your little heart desires.  You could also set it up completely mechanically, but the control would not be optimal.   Complexity?  not much really.  it would add a few moving parts to a standard head.  nothing nearly as complex as the vq37hr system, or even a honda vtec for that matter as it uses a hydraulic lifter esque part.  I know all of you are thinking "oh great, now we won't be able to wick the RPMs up"  But there have been recent engines built with hydraulic lash adjusters that are very capable of 8500RPM in STOCK trim (check out the vw 07k!)  

 

The Jury is still out on cost.  I'll know more after I have a chance to speak with the patent attorney.  That will hopefully be soon, but as I understand it he is dealing with family issues in rexas right now.  

 

And TimZ, I am glad someone appreciates my avatar!


hey, check my website for pics of my free 280zx.

#6 TimZ

TimZ

    OG Member

  • Members
  • PipPipPipPipPipPipPip
  • 2345 posts
  • LocationDearborn, MI

Posted 13 July 2015 - 03:32 AM

the benefits of it would be that if you had fine enough electronic control out of it, theoretically you could throttle the engine with it and run a 300 + degree "full race" cam and have all the power in between that your little heart desires.  You could also set it up completely mechanically, but the control would not be optimal.   Complexity?  not much really.  it would add a few moving parts to a standard head.  nothing nearly as complex as the vq37hr system, or even a honda vtec for that matter as it uses a hydraulic lifter esque part.  I know all of you are thinking "oh great, now we won't be able to wick the RPMs up"  But there have been recent engines built with hydraulic lash adjusters that are very capable of 8500RPM in STOCK trim (check out the vw 07k!)  

 

The Jury is still out on cost.  I'll know more after I have a chance to speak with the patent attorney.  That will hopefully be soon, but as I understand it he is dealing with family issues in rexas right now.  

 

And TimZ, I am glad someone appreciates my avatar!

Still sounds interesting - once you get your patent disclosures nailed down I'd like to hear more.


Posted Image

Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
-FZ, Joe's Garage

#7 calZ

calZ

    Regular

  • Members
  • PipPipPip
  • 91 posts
  • LocationCalifornia

Posted 30 December 2016 - 05:56 PM

Anything ever come of this?



#8 Tony D

Tony D

    Wiki D

  • Donating Members
  • PipPipPipPipPipPipPipPipPip
  • 9956 posts
  • LocationReno NV & Lucena Quezon, Philippines

Posted 01 January 2017 - 09:38 PM

I'm sure people would be interested, but I have seen a lot of good ideas where people are interested but they never get off the ground when it comes to people actually putting their money down on the table for it.
 
Definitely interested to see if this turns into something, though.


Well, there were oracles in the crowd...
Misanthropic Anthroparion Class 5 Hoarder, aspiring to posthumous fame as my containers are cut open and the market floods with crap I've squirrelled away over the years! I endeavour to persevere...

#9 texis30O

texis30O

    Member

  • Donating Members
  • PipPipPipPipPipPip
  • 1275 posts
  • LocationTexas

Posted 04 January 2017 - 10:53 AM

I am in Mankato for 10 days working.... I would be interested to see what you have


1970 240 Z #806, LS2 with a Maggie, t56, Fritz 8.8 swap, Coilovers, Cage, Flares, Wilwood.....

IG: sean70240z

'13 Tundra, CrewMax, .....I have issues...

"Driving this car on the street is like kissing a porn star on the cheek." -RebekahsZ


#10 HowlerMonkey

HowlerMonkey

    Member

  • Members
  • PipPipPipPipPipPip
  • 1377 posts
  • LocationWest Palm Beach

Posted 4 weeks ago

If you ever do valve springs on any VVT/L engines, you will find that the springs are super light because the valvetrain is usually correspondingly light.

 

The L28 has a relatively heavy valvetrain which requires pretty intense spring pressure and this spring pressure might be tough on any mechanism used to achieve VVT/L



#11 Neverdone

Neverdone

    Always Here

  • Members
  • PipPipPipPip
  • 235 posts
  • LocationMilwaukie, OR

Posted 4 weeks ago

So make the head desmodronic and don't worry about springs.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users