yeah Its called variable valve timing...
Nissan started doing it a whileeee back before honda called vvt and nvcs, honda just made it "tunable"

 

*CoughwowBScough*


I'm glad the last two posters don't actually know what they're talking about.


Honda invented the first Variable timing on a production car over 20 years ago, everyone else followed suite.

First versions were two cam profiles, the "on/off" versions if you like. They then started developing fuel economy versions - instead of going aggressive/race cams, they went easier more efficient profiles.

After that, they started introducing more crossover points to make the power increase more linear and progressive.

Toyota call their system VVT, not sure what Nissan call it? But yes, most manufacturers use it, even Ford used it from 2005 onwards. They're all "tunable"

Cams can only be "perfect" for one point in the rev range, the kick you feel is a combo of the cams coming on song and the electronic butterfly finally opening fully (it's opening is slowed in lower gears)

 

LOL... your just as bad as the guys above you. Porsche created variable valve timing in the 50's. Toyota's VVTi isn't like Vtec... their VVLTi is(Celica GTS, Matrix XRS, Corolla XRS, Lotus PP). They retard cam timing and have staged cam profiles. VVL(NEO) and Vtec mirror each other in operation and both have "Vtec Popping" sounds. VVL came in SR20's and IIRC SR16(or 18). Honda uses another system to incorporate the engagement and nice wikipedia reference BTW. Vtec cam lobes have 3 per cylinder and the center lobe being the largest. When the car engages Vtec the rocker arms lock and run in unison on the largest lobe... hence the "vtec pop". The new systems now are highly refined so the engagement is almost seamless to the point the new K's found in the 2012 Civic Si have a "Vtec" light that flashes on the display so you can see when the car is in Vtec.

 

Well i'm sorry if i didn't make it clear about production cars having a usable system. I'm interested in the Porsche system though, care to share?

I was generalising about the VVt system, i didn't know they had variations on the acronym... It's still a variable timing setup.

Also, what wikipedia reference? (seriously)

Until the 21st century, VTec was only two profiles, not 3, 3 lobes, yes, not 3 profiles.

 

Ok yes that makes more sense... and I was referring to the "butterfly" reference to wiki as they said something to that effect. As for the Porsche they developed the technology in the late 1950's. I believe Fiat had the first production engine using mechanical VVT but not sure which one it was or what year. Honda first used the simplest Vtec set up in motorcycles in the early 80's. I was into Honda's for many years(Still love them had: DA6-GSR, EG6/1x'2) and thought the technology was cool. My Dad worked on Porsche's, Alfa's, BMW's while living in PR and when he told me that Honda wasn't the first to develop it I thought he was crazy too.

 

ok ok I'm sorry my answer wasnt the exact answer u all copy pastad from wiki.
Yes sir this is right, I never really had a honda nor cared about vtec history classes. But I read up on the topic thanks to you all.

^ is correct

 

"winning races in a z.. Any one?"

Dumbest question I've heard in a long time

 

I thought it was a legitimate question until I realized he was referring to street racing.

 

I hate when people ask me how fast it is. I usually say idk it depends on what the speed limit is lol.

 

one of the many reasons i wanted the z

 

"So your car came pre- riced out?"

 

When I had my 06 350Z Coupe I was asked by a guy at a dealer how the "Hard Top" came down.....


Now with the 370Z I get "Where are the turbos" and "why didnt you get the V8"





DAN

 

"Can I drive it to pickup my girlfrend.. please daddy?"

LOL yea, right. uh, no.

 

I am getting very tired of these three questions:

1. But isn't the real NISMO twin turboed?
2. So that's a V8 right?
3. Is it fast?

 

"Want to get some rotas for it?"

FACEPALM

 

I get the same ones. Its soo anoying!

07 NISMO #0326
Stillen Gen 3 intake, Stillen Y-pipe, Berk HFC, Up-Rev tune 283whp

 

You will not believe what I was told the other day.

"How much horsepower does it have?"

"Around 300, comes 287 stock"

"That's slow my tundra has over 350 horsepower."



...................

 

By numerous people, What's that stickin' out the front of your grill? (Tow Hook) LOL!

 

"Does the 350 stand for # of horsepower?"

 

Do you have a 5 speed?
Yes
But it looks like an automatic
(facepalm)