hello i have a 1994 civic vx and i saw V-TEC E on my valve cover and just wondered what it stood for. Mainly need to know what the E stands for

 

economy I do believe

 

I think thats right

 

i think it uses only 12 valves until you hit vtec, thats why its economy and it sucks

 

economy.
very good gas milage with that motor. onli uses one set of intake valves below 2000 rpm, the usual functions after that, and im not exactly sure on the vtec cross over, but it uses alittle more agressive profile. nothing special tho, it makes 92 factory hp

 

extra vtech yO

 

Most likely because i get 45-50 miles to the gallon on the freeway

 

vtec-economy
vtec-extra
vtec-english
vtec-emo


What is vtec-e?

 

a decent explaination of VTEC-E:

http://www.leecao.com/honda/vtec/sohcvtece.html

 

It is vtec-economy, as some have said. Crossover should be 2800-3000, and it's not really where vtec starts, but where it ends, technically (I think). In any case, yeah, it's used in the vx, hx, insight, and jdm 3 stage vtec d15b (the first stage). Meh, not much else to say, shuts down one set of intake valves to reduce pumping losses and lean out the engine to 18:1 or 20:1. Uses a stock wideband to monitor that crap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SVOboy &raquo;</TD></TR><TR><TD CLASS="quote">It is vtec-economy, as some have said. Crossover should be 2800-3000, and it's not really where vtec starts, but where it ends, technically (I think). In any case, yeah, it's used in the vx, hx, insight, and jdm 3 stage vtec d15b (the first stage). Meh, not much else to say, shuts down one set of intake valves to reduce pumping losses and lean out the engine to 18:1 or 20:1. Uses a stock wideband to monitor that crap.</TD></TR></TABLE>

yep.

Although, with my project, i'm going to change the E to mean efficiencent!

 

Is that right? AF ratio of 18-20:1? That seems really lean even at that low of an rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Red 211 &raquo;</TD></TR><TR><TD CLASS="quote">Is that right? AF ratio of 18-20:1? That seems really lean even at that low of an rpm.</TD></TR></TABLE>

It's all about load levels, if the load is low enough... the car can basically run as lean as it can stay running on.

I run my idles at around 16afr, much leaner and car gets a hair rough.

 

my friend has a VTec+eCOMINCAL

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Red 211 &raquo;</TD></TR><TR><TD CLASS="quote">Is that right? AF ratio of 18-20:1? That seems really lean even at that low of an rpm.</TD></TR></TABLE>

Yeah, I learned this from simateoako, he's done all the research since he bought a d15z1 swap and crap, very interesting. Evidently the engine is built to take it.

 

So if I take my SAFC and EGT and go out to make some light throttle runs, how would I test to see when it is too lean so that I can stop there?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Red 211 &raquo;</TD></TR><TR><TD CLASS="quote">So if I take my SAFC and EGT and go out to make some light throttle runs, how would I test to see when it is too lean so that I can stop there?</TD></TR></TABLE>

You are hooking those upto a stock VX motor? Honestly it isn't worth your time. I even bothered to do a mini-me on a VX... it wasn't worth it either