A community of enthusiasts dedicated to Nissan's SR20DE/SR20VE/SR20DET engines.
Start here: forum search. Be sure to search on what you're looking for before posting a new thread.
You are currently browsing the forum as a guest. In order to access special features, the image gallery, and post you will need to be a registered member. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact the administrator.
Looking for nature of the acronym and what it does? Also, what engines it came on. Here is what I know
-Does not have anything to do with VVL
-Not a new generation of electronics (the SR20VE is afterall hardly more advanced than the B13 SR20DE)
-Came on SRxxVE and the RB25DE/T
Nissan Ecology Orientated Variable Valve Lift and Timing (yes, NEO is very much the same thing as VVL)
please search. i know im a noob too, but i could answer all of those questions with 5 seconds of searching...
The RB25 point has already been addressed, but what searchwords do I use to get my answer? Of course assuming that I don't know what the acronym stands for. I looked for considerably longer than 5 seconds, with no success.
And where is the "T"iming represented? How does this apply to NEO VVL?
No reason to be snide just because you know something that someone else doesn't.
Thank you rage.
Last edited by hachi_boroku : 07-09-2006 at 08:26 PM.
Nissan Ecology Orientated Variable Valve Lift and Timing (yes, NEO is very much the same thing as VVL)
please search. i know im a noob too, but i could answer all of those questions with 5 seconds of searching...
looks like you need to take some of your own advice.If the RB25DE-T did not have VVL but did have NEO writen on it then obviosly you didnt search to make sure whatever you spat out to bash on somebody was true.NEO is not VVL, it is just part of what was written on the VVL badge.Do I know what NEO stand for?Hell no, but i dont pretend to.people need to stop bashin on other people,especially when they are clueless themselves.
VVL=VE
NEO=???
VE>DE
Now please go put some ointment on that burn you just got!
And where is the "T"iming represented? How does this apply to NEO VVL?
T is not represented in the acronym. It just says it on the badge (duh). Nothing less or more. Its not variable valve timing like VTC or vvt. I think the variable timing comes in from the ECU. Not entirely sure.
Its just some clever little marketing thing they thought up. An obscure scrap of knowledge only dorks like us know. It would be pretty hard to search up I'd imagine.
__________________
1992 SE-R 'Fasty' Mods and mods in boxes. Ready for more boost, or more vvl.
"We have always known that heedless self-interest was bad morals; we know now that it is bad economics" F.D.R. Second inaugural.
"neo" is purely for marketing, to say that nissan cares about the enviroment. Nissan Ecology Oriented". VVL is "ecology oriented" because vvl help ALOT with NOx emissions. good for environment.
as for the skyline engine, it is ecology oriented because it has variable valve timing (cam phasing), kinda like the vq engines, and that also helps control NOx emissions, even better than vvl.
It's funny that people have so much trouble getting their VE's to pass emissions then, isn't it?
Personally, I had no issues at all. My car was super clean.
I was wondering if it was something specific that they did to the RB and SR, like with cumbustion chamber design or porting. The RB25DE actually is a LEV, but I believe there was a NEO R34 RB20DE that didn't achieve LEV figures.
Personally I never had trouble getting a pass with an SE-R. Tune it change the things you have to, and it flys through (even w/o aiv/egr).
WA emissions are not super strict like people seem to think (NY was much more stringent) but I think the VE would do even better than a DE if running right.
edit; I don't think wa even does NOx
Last edited by Benito Malito : 07-10-2006 at 01:14 AM.
yeah, *** in japan, they dont have egr as we all know, and the primary purpose of egr is to redue NOx emissions.
further, if you ever see a Saturn with the Ecotec engine in it (thats where the ecotecs came from), there was some model years that didnt' have egr on it, because the ecotec has variable valve timing, and it controls NOx by monitoring exhaust temperature (the hotter the exhaust temp is, the more NOx you have). so by adjusting cam timing, the more overlap you have = improved scavenging effect in cylinder (more power, higher temps), and the less overlap you have = reduction in NOx
there are many engines with this same example, i just used the ecotec as an exampl because i have learned ALOT about this engine when i went to ASEP (GM's technician school)
