hey hey from easternshore! (with Civic VX questions) - Page 3 - Fuel Economy, Hypermiling, EcoModding News and Forum

vrmouseyd15b · 06-17-2014, 10:20 PM

vtec e is equivalent to my 12v operation

from there your ecu can lean burn for more economy, or go into vtec for 16v

83gs1100g · 06-17-2014, 10:39 PM

Quote:

Originally Posted by xntrx

It has nothing to do with lean burn, its all rpm vtec switch over dependent.

what is?

[/QUOTE] Its technically always using 16v. [/QUOTE]

correct. and thats at any rpm that its not in lean burn.

[/QUOTE] At low rpm, one only opens very slightly (to promote swirl and fuel pooling), so it might as well be 12v. [/QUOTE]

yes but not at all low rpm. it only does this if you are easy on the throttle. as soon as you step on it even at 1500rpm it goes back to 16v mode.

[/QUOTE] Once it reaches the change over (2500 for USDM), to two rocker arms are locked together and fully open. Since you've looked at 3 stage, its the same, just without the extra high lift rocker. [/QUOTE]

its in 16v mode even at idle. vx vtec-e doesnt have to wait to get above a certain rpm to go in 16v mode. the rpm limit just means it wont go into lean burn after that point.

Superfuelgero · 06-17-2014, 11:15 PM

Quote:

Originally Posted by 83gs1100g

what is?

lean burn and vtec, they are independant. Don't get stuck thinking they are connected. You can lean burn even after the change over if the load is low enough.

To clarify:
Lean burn = any time it is low load (assuming gear or temp is within spec).
Vtec (full 16v) = anytime over 2500rpm in US spec d15z1's

Notice from the above, there are 4 possible combinations, since the requirements for each are different.

vrmouseyd15b · 06-17-2014, 11:21 PM

[QUOTE=83gs1100g;430318]what is?

HUH??? Ok, my turn to ask you some questions.

Since we are all ECOMODDERS, we do things to our cars. Many times this means switching motors, transmissions, etc. I'M NOT SAYING YOU DID, BUT....

If you told us what engine block, head, and ECU you are running, you would be able to cast a much wider net in your search for information.

Then you might really find an expert, a guy that might not have a clue what motor came in YOUR car, but because he liked the specs and bought the same motor to put in HIS car, he would know what you're talking about

I'M NO EXPERT, I'm just trying to share what I picked up along my quest for knowledge

83gs1100g · 06-18-2014, 01:17 AM

[QUOTE=vrmouseyd15b;430321]

Quote:

Originally Posted by 83gs1100g

what is?

HUH??? Ok, my turn to ask you some questions.

Since we are all ECOMODDERS, we do things to our cars. Many times this means switching motors, transmissions, etc. I'M NOT SAYING YOU DID, BUT....

If you told us what engine block, head, and ECU you are running, you would be able to cast a much wider net in your search for information.

Then you might really find an expert, a guy that might not have a clue what motor came in YOUR car, but because he liked the specs and bought the same motor to put in HIS car, he would know what you're talking about

I'M NO EXPERT, I'm just trying to share what I picked up along my quest for knowledge

bone stock vx. all original. i am trying to find a vx service manual if there is such a thing?

83gs1100g · 06-18-2014, 01:19 AM

Quote:

Originally Posted by xntrx

lean burn and vtec, they are independant. Don't get stuck thinking they are connected. You can lean burn even after the change over if the load is low enough.

To clarify:
Lean burn = any time it is low load (assuming gear or temp is within spec).
Vtec (full 16v) = anytime over 2500rpm in US spec d15z1's

Notice from the above, there are 4 possible combinations, since the requirements for each are different.

are you saying vx vtec-e is same as hx vtec-e? cause there not from what i have learned.

vrmouseyd15b · 06-18-2014, 01:21 AM

If I remember, correctly, I found a download link at < d series.org >

Let me see if I can find it again and post a link - it's too big to share otherwise