SOHC VTEC Explained

[wez20011]

hey i got a noob question. we here at the phillipines post a 3 stage vtec 2k1 model civic. engine model is d16w8. u guys have an idea this is true or bull? i mean we even got stickers placed on the back side of the car saying 3 stage. although we have the same chasis, we only got the 1.6 variant available here and not the 1.7l so m thinking did we here just got lied too? heres the official honda philippines site stating that we have a vtec3 engine. and a 2.0l k20 http://www.hondaphil.com/indexFlash.htm

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[allmotor]

great info

[nindoo]

I heard there isn't much you could do on our engines, in terms of boring and and all. Its pretty much maxed out from the factory. How do you know when boring an engine makes a diff? and what is boring th engine?

[4drcivic2k1]

Boring an engine means making the cylinders bigger, thus increasing the displacement. Most stock sleeves in hondas can take .5mm oversize with no problem.

wez,
To see if your car has 3 stage VTEC, look for 2 VTEC solenoids by the valve cover.

[_Viper_]

You forgot to say how SOHC VTEC sucks lollll

Great post

[fuya_inc]

great vtech info!! thanks

[SUPERFLY]

Cam specs are wrong, basically were measured wrong.

[C Orndorff]

Those are from a Honda Tech book. I included the copies of the pages also.

[rum151]

so does this mean that the D17A2 engine is just worthless even if you port and polish the head and block and add retainers, rings, valves, piston and rods, cams ect ect, ?.. can an attempt to sleeve out the D17A2 all motor make a beast out of it.?? plus maybe addinga turbo afterwards..

what do yall think.?

[CivicsRdBest]

Originally Posted by wez20011

hey i got a noob question. we here at the phillipines post a 3 stage vtec 2k1 model civic. engine model is d16w8. u guys have an idea this is true or bull? i mean we even got stickers placed on the back side of the car saying 3 stage. although we have the same chasis, we only got the 1.6 variant available here and not the 1.7l so m thinking did we here just got lied too?

heres the official honda philippines site
stating that we have a vtec3 engine. and a 2.0l k20

http://www.hondaphil.com/indexFlash.htm

3 stage is interesting becasue it combines VTEC-E and a regular SOHC VTEC into one engine. It is correct. You have a very lean slow mode for Philippine traffic, a mild mode for highway and super highway use, and the last one for accelerating like a bat out of hell Honda style. The reason that a 1.6 L engine is used in the Philippines is because there are taxes on larger engines, which is why the K20 is also available because the Corolla has a 1.8L optional engine (here, it comes standard)

here is some info on the 3-stage, which is the version we should get if Honda keeps the Civic SOHC. 3- stage VTEC info for my pare in the Philippines.

[C Orndorff]

Here is the proof that only one valve opens until VTEC engagement. I tore apart my entire F****** motor to prove you wrong 4drcivic2k1 (and I was doing some other stuff too but you will see that in the DIY section soon). This is at top dead center.

[FingerJ]

4drcivic2k1 you just got owned. I remember you saying there was no way only one valve could open up on the intake side. You even made a big fuss over it, saying you knew everything about Honda’s. Nice job caorndorff, looks like a lot of work.

[gearbox]

Yup that exactly how mine looked when we swapped the head. We thought something was wrong cause of that one valve sticking out

[gearbox]

and it seems like the lx would be faster having both valves open instead of 1 when vtec is in low cam profile. Does that mean the extra power from the ex only comes from vtec, which nobody ever even uses if you have to floor the car and take it to high rpms. I don't think any average civic owner does that.

[4drcivic2k1]

You said 2 valves open total. Rotate it to the exhaust lobe, both of those will be open. That other intake valve is open as well, pour some water on it and see.