Okay, I know what VTECH does but is there any thing special about a DOHC. If there is what.
THanx

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Den-Man07 &raquo;</TD></TR><TR><TD CLASS="quote">Okay, I know what VTECH
THanx</TD></TR></TABLE>

I heard DOHC VTECH give you better reception, so you can walk further away from the phone base, but I wouldn't want you to qoute me on that, 'cuz I'm no VTECH expert, and I know my VTECH phone doesn't have the DOHC

 

hes t<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by foz &raquo;</TD></TR><TR><TD CLASS="quote">

I heard DOHC VTECH give you better reception, so you can walk further away from the phone base, but I wouldn't want you to qoute me on that, 'cuz I'm no VTECH expert, and I know my VTECH phone doesn't have the DOHC</TD></TR></TABLE>


hes talking about engines not phones errrrrrrrrr

 

vtec = hondas veriable valve timing .... etc
vtech = 900 mhz of uber phone power


ok neways

in a DOHC Vtec engine both the intake and the exhaust cams switch over to the third cam loob

in a SOHC Vtec engine only the intake valves take on the new cam lob.

this causes less punch to be felt in the single cam design.


oh yeah you probbaly could of searched and found this info too....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by regime &raquo;</TD></TR><TR><TD CLASS="quote">

oh yeah you probbaly could of searched and found this info too.... </TD></TR></TABLE>

not if he searched for "vtech"

 

 

DOHC can also run higher RPM's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gutted-dx &raquo;</TD></TR><TR><TD CLASS="quote">DOHC can also run higher RPM's</TD></TR></TABLE>

No they cant, its all in how honda built the motors, if honda would have put just as much time into building d-series they would be just as strong, and high revving as a b, in stock form, Dont knock the sohc, there just as good. You just have to be a better tuner, and pay more attention to details to get them to kick some ***.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by phatrick2332 &raquo;</TD></TR><TR><TD CLASS="quote">

No they cant, its all in how honda built the motors, if honda would have put just as much time into building d-series they would be just as strong, and high revving as a b, in stock form, Dont knock the sohc, there just as good. You just have to be a better tuner, and pay more attention to details to get them to kick some ***.</TD></TR></TABLE>

totaly true

look at the s2000... is a single

 

i believe DOHC engines have better airflow because they have 4 valves per cylinder (2 intake, 2 exhaust) vs. 2 valves per cylinder in a SOHC engine. As you can imagine, this is especially useful at high RPMs, when a lot of air is being sucked in and blown out.
source: http://auto.howstuffworks.com/question562.htm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by regime &raquo;</TD></TR><TR><TD CLASS="quote">

totaly true

look at the s2000... is a single</TD></TR></TABLE>

s2k is a DOHC, if thats what you're implying. I'm a big fan of the drrrty D series

 

ummm not to be like the teacher in tis room but ever S2K i've seen has DOHC VTEC..and my D16A6 has a 16 valve (4 valves per cylider)

Oh and i almost bought a VTECH ..i need another cordless phone. But the DOHC ZC is my engine of choice from what i've read, with all the money i could put into swaping a B16 into my car i can make a cheap turbo kit and build the internals for 10 PSI as a daily driver; that should keep up with a B16 CRX

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx480 &raquo;</TD></TR><TR><TD CLASS="quote">i believe DOHC engines have better airflow because they have 4 valves per cylinder (2 intake, 2 exhaust) vs. 2 valves per cylinder in a SOHC engine. As you can imagine, this is especially useful at high RPMs, when a lot of air is being sucked in and blown out.
source: http://auto.howstuffworks.com/question562.htm</TD></TR></TABLE>

Sorry only The HF D series motor had 2 vavles per cylnder

 

yeah and its a noticable diffrence in performance compared to the Si model, i test drove one that my girl Friend wanted to buy and it had no power compared to my Si

 

Ya know I read all of the responses and didnt learn a thing. all of your answers went aginst the one before it will some one please tell me what is the absolute truth

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Den-Man07 &raquo;</TD></TR><TR><TD CLASS="quote">Ya know I read all of the responses and didnt learn a thing. all of your answers went aginst the one before it will some one please tell me what is the absolute truth </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by regime &raquo;</TD></TR><TR><TD CLASS="quote">in a DOHC Vtec engine both the intake and the exhaust cams switch over to the third cam loob

in a SOHC Vtec engine only the intake valves take on the new cam lob. </TD></TR></TABLE>

 

ok...vtec gives you more power at higher RPMs, so where a non-vtec engine starts to max out on power, the vtec will engage and continue with power. Now i'm not 100% sure about this but the way Vtec was explained to me is its simular to a racing cam, it opens the valves more and provides more fuel/air thus creating a more powerful explosion. As most people know a full race cam will idle at like 1500-2000 RPMs and have a more broad power band, so Vtec gives you the effeciency of a daily driven honda, but if you floor the pedal and engage VTEC (4500 RPMs i think) you switch over to the "racing" cam and have more power

As for the DOHC...the only reason i can think it would be better is that it simply because it would be more tunability and run smoother being as that (i think) one cam runs intake and one runns exhaust

now i hope some people who really know can elaborate of kill anything i said. I'm not 100% sure on all this but i think you'll get the idea

 

What a retarded thread.

 

maybe he was just confused...as long as he has potential to learn then he is worth it, well the time at least.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4drEF &raquo;</TD></TR><TR><TD CLASS="quote">What a retarded thread.</TD></TR></TABLE>

 

^^ your correct, just not really a "racing" cam, kind of a mild cam compared to non-vtec lobes.

With vtec you get the fuel economy and the easy driveability of a typical honda engine, and when vtec is hit, u get a more aggresive lift, and duration on the cam, when the vtec lobe is enabled. DOHC the intake and exhaust both have the vtec lobes, so both intake and exhuast stay open longer, and open up more, SOHC, just the intake is getting the increased lift and duration.

But, vtec is not always the best for every build. If your going for a really build d-series NA setup, non-vtec is the way to go, you can run a higher lift cam with non-vtec, but ur going to lose some of the driveability down low, and its going to be a harsh, and sudden power band.

There are trade offs to both, and both do there intended purposes great.

I prefer the D-series non-vtec engines myself, always liked the underdog

 

yea he said it, if you want more detail read here: http://auto.howstuffworks.com/question229.htm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gutted-dx &raquo;</TD></TR><TR><TD CLASS="quote">DOHC can also run higher RPM's</TD></TR></TABLE> in theory the less moving parts you have the higher you can take your motor.... thats why the wankel (rotary) engine can go so hight up there in rpm's

 

So the topic's question is what exactly? DOHC vs. VTEC? You do realize that there are plenty of SOHC and DOHC VTEC engines, right? You can have both.

I'd like to know what two engines you are comparing or debating upon getting, because a VTEC vs. DOHC topic itself is just damned silly.

Also a few things:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">DOHC can also run higher RPM's</TD></TR></TABLE>

Says who? You? Why would an engine be able to sustain higher revs just because it's a DOHC? Revs have more to do with the valvetrain, cam profiles (as far as the powerband goes) and the bottom end - not whether or not the engine has two cams. I've seen plenty of SOHC engines able to make more power up top than some DOHC engines simply because the way they were built.

Also stock vs. stock a D16Z6 SOHC VTEC engine has just as high if not higher redline than a DOHC B18A1 engine.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">look at the s2000... is a single</TD></TR></TABLE>

Come on bro, really? Since when is an S2000 a SOHC? They are DOHC VTEC motors - always have been.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Sorry only The HF D series motor had 2 vavles per cylnder </TD></TR></TABLE>

Not true.

The 1992-1995 Civic CX engines were also 8 valve engines - 2 valves per cylinder.

Just a few things I noticed in this topic.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Den-Man07 &raquo;</TD></TR><TR><TD CLASS="quote">Okay, I know what VTECH does but is there any thing special about a DOHC. If there is what.
THanx</TD></TR></TABLE>

Darwin called he is looking for you..