Put intake cam in exhaust position
08-03-2005, 05:31 AM
#1
Junior Member
Thread Starter
Join Date: Jul 2003
Location: Harrisburg, PA, USA
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts
Put intake cam in exhaust position
Has anyone ever heard of putting the exhaust cam in the intake cams place or vice versa? Would this actually work?
08-03-2005, 03:12 PM
#4
Junior Member
Thread Starter
Join Date: Jul 2003
Location: Harrisburg, PA, USA
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (vtecb20coupe)
But even if you could put it there, wouldn't that mean the valve would open and close at the wrong time?
08-03-2005, 03:20 PM
#5
Junior Member
Thread Starter
Join Date: Jul 2003
Location: Harrisburg, PA, USA
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (hondapwr)
I mean the rollers are in the same place but the lobes are set to open the valves at the wrong time right? So if you had two intake cams in the engine the valves would open at the exact same time?
08-03-2005, 03:54 PM
#6
Re: Put intake cam in exhaust position (vtecb20coupe)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecb20coupe »</TD></TR><TR><TD CLASS="quote">exactly. it's impossible.</TD></TR></TABLE>
Wrong.
With the DOHC ZC it is possible, they have the keyway for the distributor in the intake cam and a keyway for the CYP in the exhaust cam. I came across one at our shop that had this problem. The car ran fine, just threw code 9 and the ignition timing couldn't be nailed. Pulled the valve cover off to discover the cams in the wrong spot
Swapped the cams and the code was gone and the timing could be set correctly.
Wrong.
With the DOHC ZC it is possible, they have the keyway for the distributor in the intake cam and a keyway for the CYP in the exhaust cam. I came across one at our shop that had this problem. The car ran fine, just threw code 9 and the ignition timing couldn't be nailed. Pulled the valve cover off to discover the cams in the wrong spot
Swapped the cams and the code was gone and the timing could be set correctly.
08-03-2005, 06:41 PM
#7
Junior Member
Thread Starter
Join Date: Jul 2003
Location: Harrisburg, PA, USA
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (96-EJ6 B18C)
But wouldn't that mean the event timing if reversed so it sucks air in the exhaust header, and blows it out the intake pipe?
I'm really trying to understand this.
I'm really trying to understand this.
Trending Topics
08-03-2005, 07:08 PM
#8
B*a*n*n*e*d
Join Date: Aug 2004
Location: Sanger, California, United States
Posts: 697
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (hondapwr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondapwr »</TD></TR><TR><TD CLASS="quote">But wouldn't that mean the event timing if reversed so it sucks air in the exhaust header, and blows it out the intake pipe?
I'm really trying to understand this.</TD></TR></TABLE>
No it just means it would suck air when it would regularly be blowing it. And visa versa.
Very stupid thing to do.
I'm really trying to understand this.</TD></TR></TABLE>
No it just means it would suck air when it would regularly be blowing it. And visa versa.
Very stupid thing to do.
08-03-2005, 10:53 PM
#9
Re: Put intake cam in exhaust position (hondapwr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondapwr »</TD></TR><TR><TD CLASS="quote">But wouldn't that mean the event timing if reversed so it sucks air in the exhaust header, and blows it out the intake pipe?
I'm really trying to understand this.</TD></TR></TABLE>
Nope the motor is still spinning the same way, and the cam profiles are such that when they are timed properly the motor will still run normally for the most part. Believe me when I pulled the valve cover and saw "EXH" stamped on the intake cam I was like WTF?!?!?!?!? How did this thing even run??? It actually ran pretty well too!
I'm really trying to understand this.</TD></TR></TABLE>
Nope the motor is still spinning the same way, and the cam profiles are such that when they are timed properly the motor will still run normally for the most part. Believe me when I pulled the valve cover and saw "EXH" stamped on the intake cam I was like WTF?!?!?!?!? How did this thing even run??? It actually ran pretty well too!
08-03-2005, 10:57 PM
#10
Member
Join Date: Nov 2004
Location: Kitchener, Ontario, Canada
Posts: 1,792
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (96-EJ6 B18C)
Hmm... why couldn't the ignition timing be nailed then? Are the keyways in different positions or something?
08-03-2005, 10:58 PM
#11
Re: Put intake cam in exhaust position (_Cyclone_)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by _Cyclone_ »</TD></TR><TR><TD CLASS="quote">Hmm... why couldn't the ignition timing be nailed then?</TD></TR></TABLE>
Becuse the angle of the keyways is slightly different, about 20 deg. That is also why the car was throwing the CYP code. Swap the cams and the code was gone and timing could be dialed perfectly.
Becuse the angle of the keyways is slightly different, about 20 deg. That is also why the car was throwing the CYP code. Swap the cams and the code was gone and timing could be dialed perfectly.
08-03-2005, 11:18 PM
#12
Member
Join Date: Nov 2004
Location: Kitchener, Ontario, Canada
Posts: 1,792
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (96-EJ6 B18C)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96-EJ6 B18C »</TD></TR><TR><TD CLASS="quote">Becuse the angle of the keyways is slightly different, about 20 deg. That is also why the car was throwing the CYP code. Swap the cams and the code was gone and timing could be dialed perfectly. </TD></TR></TABLE>
Ah... that's what I figured.
Ah... that's what I figured.
08-04-2005, 02:39 PM
#13
Junior Member
Thread Starter
Join Date: Jul 2003
Location: Harrisburg, PA, USA
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (96-EJ6 B18C)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96-EJ6 B18C »</TD></TR><TR><TD CLASS="quote">Nope the motor is still spinning the same way, and the cam profiles are such that when they are timed properly the motor will still run normally for the most part. Believe me when I pulled the valve cover and saw "EXH" stamped on the intake cam I was like WTF?!?!?!?!? How did this thing even run??? It actually ran pretty well too! </TD></TR></TABLE>
How can this be?? I thought the rocker arms come in contact with the cam in the same place, no matter if it's in the int or exh position? Therefore is is the camshaft that determines the open/close of the valve.
So confused..
</TD></TR></TABLE>How can this be?? I thought the rocker arms come in contact with the cam in the same place, no matter if it's in the int or exh position? Therefore is is the camshaft that determines the open/close of the valve.
So confused..
08-04-2005, 07:40 PM
#14
Re: Put intake cam in exhaust position (hondapwr)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondapwr »</TD></TR><TR><TD CLASS="quote">
How can this be?? I thought the rocker arms come in contact with the cam in the same place, no matter if it's in the int or exh position? Therefore is is the camshaft that determines the open/close of the valve.
So confused.. </TD></TR></TABLE>
I have a B-Series all torn down at the shop, Ill do some further investigation and try to figure out how to explain it better.
How can this be?? I thought the rocker arms come in contact with the cam in the same place, no matter if it's in the int or exh position? Therefore is is the camshaft that determines the open/close of the valve.
So confused..
</TD></TR></TABLE>I have a B-Series all torn down at the shop, Ill do some further investigation and try to figure out how to explain it better.
08-04-2005, 08:49 PM
#15
Junior Member
Join Date: Nov 2004
Location: Tempe, AZ, USA
Posts: 87
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (96-EJ6 B18C)
I have heard of people building Hayabusa engines buying like a Web cam for the intake side and moving the factory intake cam to the exhaust side. I was told that no modification to the cam was needed. Only to degree the cams properly.
The reason is that a factory intake cam has an ideal profile for an agressive exhaust cam. And you only have to purchase 1 cam!
I was just talking about this to a guy at the shop today. we couldn't think of anyone who has tried yet on a honda. we are probably too lazy to try, but if anybody does it with success I would love to know the results!
The reason is that a factory intake cam has an ideal profile for an agressive exhaust cam. And you only have to purchase 1 cam!
I was just talking about this to a guy at the shop today. we couldn't think of anyone who has tried yet on a honda. we are probably too lazy to try, but if anybody does it with success I would love to know the results!
08-05-2005, 12:26 AM
#16
Member
Join Date: Nov 2004
Location: Kitchener, Ontario, Canada
Posts: 1,792
Likes: 0
Received 0 Likes
on
0 Posts
Re: Put intake cam in exhaust position (flatblackracing)
After the cost of machining a keyway for the dizzy, you're probably better off just getting the aftermarket cams together as a package deal.
Thread
Thread Starter
Forum
Replies
Last Post
milano2kdc2
All Motor / Naturally Aspirated
14
05-13-2005 06:34 PM
sicilian2k1
Acura Integra
6
09-16-2001 07:20 PM
