zenon8890

whats the diffrence between the blacktop jdm d15b vtec from a 92-95 civic and the JDM d15b vtec silver top from the 96+ civics?! i wanna swap one on my civic lx, so if there's a big diffrence between these two engines i'll buy the better one, i'm just swapping the engines wont swap the ecu for now, and engage vtec through a vtec controler, or just swap head.

BlueIntegraBoy

iTrader: (5)

The most common D15B from 92-95 was the SOHC VTEC and from 96-00 was the SOHC 3-STAGE VTEC. I think the OBD1 D15B would be easiest to install.

But there were other D15Bs as well.

zenon8890

i hope u can tell me how can i recognise them, the silver top d15b doesnt say vtec on it, and there's vtec-e, just wanna know who'll give me more power and more noticable vtec engagment

pdotjones

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zenon8890 &raquo;</TD></TR><TR><TD CLASS="quote">i hope u can tell me how can i recognise them, the silver top d15b doesnt say vtec on it, and there's vtec-e, just wanna know who'll give me more power and more noticable vtec engagment</TD></TR></TABLE> a nice cam and headwork

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zenon8890 &raquo;</TD></TR><TR><TD CLASS="quote">i hope u can tell me how can i recognise them, the silver top d15b doesnt say vtec on it, and there's vtec-e, just wanna know who'll give me more power and more noticable vtec engagment</TD></TR></TABLE>

I didn't know there was such thing as an OBD-II JDM D15B..?

Just get a Z6 head and slap it on, not only is it cheaper and just as powerful, but it's a ****-ton more plentiful.

Probot

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueIntegraBoy &raquo;</TD></TR><TR><TD CLASS="quote">The most common D15B from 92-95 was the SOHC VTEC and from 96-00 was the SOHC 3-STAGE VTEC. I think the OBD1 D15B would be easiest to install.

But there were other D15Bs as well.</TD></TR></TABLE>

i dont think the d16y8(96-00) had 3-stage vtec - you're thinking of vtec-e and i cant remember the engine code off the top of my head. unless im completely wrong, then i apologize for that.

dannis.

3-stage VTEC is implemented on the D15B 1.5l SOHC engine in which the VTEC-E mechanism is combined with the power VTEC mechanism.

Below 2500rpm and with gentle accelerator pressure, neither pin gets actuated. The engine operates in 12V mode with very good fuel combustion efficiency. When the right foot gets more urgent and/or above 2500rpm, the upper pin gets actuated. This is the VTEC-E mechanism at work and the engine effectively enters into the '2nd stage'. Now D15B 3-stage works in 16V mode (both intake valves works from the same mild cam-lobe).

Stage 2 operates from around 2500rpm to 6000rpm. When the rpm exceeds 6000rpm, the VTEC mechanism activates the wild cam-lobe pushing the engine into the '3rd stage', the power stage. Now the engine gives us the full benefit of its 130ps potential !

The 3-stage VTEC D15B engine is used on the current EK-series JDM Civic/Civic Ferio VTi/Vi together with Honda's new Multimatic CVT transmission. Stage-1 12V or "lean-burn" operation mode is indicated to the driver by an LED on the dashboard. The 2500rpm cutover from lean-burn to normal 16V operation in fact varies according to load and driver requirements. With gentle driving, lean-burn can operate up to 3000rpm or higher. Stage-3 may not always be activated. The Multimatic transmission has a selector for Economy, Drive, and Sports mode. In Economy mode for eg, the ECU operates with a max rpm of around 4800rpm even at Wide-Open-Throttle positions.

The essence of 3-stage VTEC is power AND economy implemented on a 1.5l SOHC PGM-Fi engine. Many people mistakes 3-stage VTEC as a "superior" evolution of the power oriented DOHC VTEC implementation, describing DOHC VTEC as "the older 2-stage VTEC" and implying an inferior relationship. This is totally wrong because DOHC VTEC is tuned purely for high specific output and sports/racing requirements. 3-stage VTEC is in truth an evolution of SOHC VTEC and VTEC-E, merging the two implementations into one.

I hope that helps everyone understand how 3 stage vtec works.

zenon8890

ok so i can say the 2 stage vtec from the 95 is exactly the same as the d15b vtec 2 stage from the 96+ right?