Next NSX (HSC) to be SOHC?
Honda-Tech Member
Joined: Apr 2003
Posts: 1,786
Likes: 0
From: San Jose, CA
Re: Next NSX (CleenSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CleenSi »</TD></TR><TR><TD CLASS="quote">no thers 2 cams there.</TD></TR></TABLE>
A v6 has two heads...the picture shows one cam on each head...thus making it a single overhead cam configuration.
A v6 has two heads...the picture shows one cam on each head...thus making it a single overhead cam configuration.
Trending Topics
Joined: Sep 2002
Posts: 307
Likes: 0
From: crazy town, tx
Re: Next NSX (Soon2B18Boost)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Soon2B18Boost »</TD></TR><TR><TD CLASS="quote">
SOHC-SingleOverHeadCam
DOHC-DualOverHeadCam......
look at each of the head's? and look closey....</TD></TR></TABLE>
we are aware of this, but why make it a SOHC, honda has always made the most power with DOHC, not SOHC, the point we are trying to make is why are they going SOHC - it there something we are missing?
only thing i can see if that the single cam with roller rockers make it to where the valve can move farther up and down - therefore letting more air in and more exhaust out...this is the only reason i see why honda would do this
intelligence is what we are looking for, we can see there is 2 cams and not 4
Joined: Jul 2003
Posts: 50
Likes: 0
From: Los Angeles, CA, US
Re: Next NSX (HSC) to be SOHC? (powerofdreams8)
Yeah, I see a SOHC too. What's so confusing? I guess the "V" 6 is confusing people that are more used to inlines. And yes a DOHC V6 does have 4 cams. Anyone have a picture like that (like crosssection) of a W8? Now that would have a 4 cam configuration on SOHC and 8 for DOHC. =D
Oh yeah, slowazz. If the SOHC were only beneficial in creating a higher lift in the valves, why couldn't they make higher profile lobes in the camshafts?
Oh yeah, slowazz. If the SOHC were only beneficial in creating a higher lift in the valves, why couldn't they make higher profile lobes in the camshafts?
Member
Joined: Jun 2001
Posts: 1,395
Likes: 0
From: Norwalk, CT
Re: Next NSX (aznxphreak)
It's more than likely going to be a J-series V6 . . . and they're all SOHC. But it's not like it's hard to make power with those engines, so it doesn't matter to me. The new TL's already put down almost as much power as the current NSX. A more aggressive cam profile, better exhaust manifold, & a massaged head . . . . 300 whp easy.
And the only real advantage DOHC holds over SOHC is the ability to tune via cam gears after the fact. Plus SOHC often offers the advantage of less reciprocating valvetrain weight, and straighter intake/exhaust paths in the head.
And the only real advantage DOHC holds over SOHC is the ability to tune via cam gears after the fact. Plus SOHC often offers the advantage of less reciprocating valvetrain weight, and straighter intake/exhaust paths in the head.
Honda-Tech Member
Joined: Oct 2003
Posts: 1,499
Likes: 0
From: Los Angeles, CA, USA
Re: (91integraLSVTEC)
hahaha cleensi... This just goes to show you I will never change my sig... Read it and enjoy explains alot of postings on the internet.
A SOHC can make more power becasue of less reciprocating mass, but there is always a but, most SOHC motors are designed to be usually smaller less efficient motors than that of a DOHC. Also the grinds on the cams on a SOHC would have to be perfect as to where on a DOHC cam the intake cam and exhaust cam are seperate and the timing of the cams can be changed independently instead of like that of a SOHC.
A SOHC can make more power becasue of less reciprocating mass, but there is always a but, most SOHC motors are designed to be usually smaller less efficient motors than that of a DOHC. Also the grinds on the cams on a SOHC would have to be perfect as to where on a DOHC cam the intake cam and exhaust cam are seperate and the timing of the cams can be changed independently instead of like that of a SOHC.
Member
Joined: Jun 2001
Posts: 1,395
Likes: 0
From: Norwalk, CT
Re: (91integraLSVTEC)
Correlation does not imply causation.
DOHC is often used on high-revving 4-cylinders, 8-cylinders, & inline 6-cylinders because the cams are so long -- too many lobes on a single shaft can reduce reliability at high rpms.
DOHC is often used on high-revving 4-cylinders, 8-cylinders, & inline 6-cylinders because the cams are so long -- too many lobes on a single shaft can reduce reliability at high rpms.
Member
Joined: Jun 2001
Posts: 1,395
Likes: 0
From: Norwalk, CT
Re: (ChronicWorks)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ChronicWorks »</TD></TR><TR><TD CLASS="quote">not all 2 cam v6's are sohc design... prime example is the vw vr6.... 2 cam dohc v6</TD></TR></TABLE>
Prime example is a good word, since it's the only example.
Of course, it's arguable that the VR6 doesn't even count as a V6 . . . . only one head and the cylinders aren't parallel.
It's also worth noting that some 4-cam V engines still function as SOHC . . . . One cam drives the other on each head, so it's impossible to adjust intake or exhaust independently unless you get a different grind in there.
Prime example is a good word, since it's the only example.
Of course, it's arguable that the VR6 doesn't even count as a V6 . . . . only one head and the cylinders aren't parallel.It's also worth noting that some 4-cam V engines still function as SOHC . . . . One cam drives the other on each head, so it's impossible to adjust intake or exhaust independently unless you get a different grind in there.
Honda-Tech Member
Joined: Jan 2003
Posts: 8,132
Likes: 5
Re: (Daemione)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Daemione »</TD></TR><TR><TD CLASS="quote">... the VR6 doesn't even count as a V6 . . . . only one head and the cylinders aren't parallel...</TD></TR></TABLE>Yes. Even VW has occasionally described it as an inline-6 with staggered bores.
And... Sometimes SOHC is used because of space. Look at that engine up at the top of the thread. Maybe(?) a DOHC head would take up too much space, requiring a more restrictive intake manifold.
And... Sometimes SOHC is used because of space. Look at that engine up at the top of the thread. Maybe(?) a DOHC head would take up too much space, requiring a more restrictive intake manifold.
Guest
Posts: n/a
Re: Next NSX (michaelOlson)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by michaelOlson »</TD></TR><TR><TD CLASS="quote">
A v6 has two heads...the picture shows one cam on each head...thus making it a single overhead cam configuration.</TD></TR></TABLE>
yea makes sense...didnt know that
sorry for the misconception
A v6 has two heads...the picture shows one cam on each head...thus making it a single overhead cam configuration.</TD></TR></TABLE>
yea makes sense...didnt know that
sorry for the misconception
Guest
Posts: n/a
Re: (TeStUdO)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeStUdO »</TD></TR><TR><TD CLASS="quote">If they were DOHC, wouldnt you call it a Quad Cammer???? Just wondering...........</TD></TR></TABLE>
that was also sorta the thought going thru my head.
that was also sorta the thought going thru my head.
Honda-Tech Member
Joined: Oct 2003
Posts: 1,499
Likes: 0
From: Los Angeles, CA, USA
Re: (raene)
Not really yes they are longer, but if built right you will not have a problem. The biggest problem would be the actual valvetrain being able to sustain a high RPM. I built a car SOHC which we could rev to 12500 all day long D16.
Joined: Jul 2003
Posts: 50
Likes: 0
From: Los Angeles, CA, US
Re: (raene)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene »</TD></TR><TR><TD CLASS="quote">I believe SOHCs also have longer rocker arms, causing higher valvetrain instability at high rpms. That's why the DOHCs rev more - the rockers are nowhere near as long as on a SOHC. </TD></TR></TABLE>
I see rollers instead...
I see rollers instead...
Member
Joined: May 2002
Posts: 1,861
Likes: 1
From: Hell, frozen over. USA
Re: Next NSX (HSC) to be SOHC? (powerofdreams8)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by powerofdreams8 »</TD></TR><TR><TD CLASS="quote"> 
</TD></TR></TABLE>
I'm still trying to figure out were the sparkplugs are supposed to go... The cam is in the way..?
I'm still trying to figure out were the sparkplugs are supposed to go... The cam is in the way..?
i HAS questions ?
Joined: Feb 2003
Posts: 7,850
Likes: 0
From: OH
Re: Next NSX (MrTodd)
Look just to the inside of the valvesprings for the exhaust side. There are long cylindrical tubes going from the valvecover down. I'm assuming thats what they are, as thats what they looked like on my D16.
Joined: Sep 2003
Posts: 116
Likes: 0
From: Deerfield, IL, USA
Re: Next NSX (MrTodd)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrTodd »</TD></TR><TR><TD CLASS="quote">
I'm still trying to figure out were the sparkplugs are supposed to go... The cam is in the way..?</TD></TR></TABLE>
hmmm that made me think of something.... i read in a mag recently that honda had just built its first Diesel engine. Now bear in mind that i don't know what a diesel engine looks like internally, but i do know that they don't have spark plugs. Could this be the honda diesel engine?
I'm still trying to figure out were the sparkplugs are supposed to go... The cam is in the way..?</TD></TR></TABLE>
hmmm that made me think of something.... i read in a mag recently that honda had just built its first Diesel engine. Now bear in mind that i don't know what a diesel engine looks like internally, but i do know that they don't have spark plugs. Could this be the honda diesel engine?