What factors will decide the direction of the crank rotation. Do all honda engines rotate counter clockwise??? which engines are the exception's......... Any help will be apreciated.

 

Well the starter gets the crank going in that direction then the engine just continues on as the pistons fire.
The K series i THINK rotates clockwise. Or maybe they just turned the engine around.

 

The crank will usually rotate the same as the tires when moving foward. So it depends which side the engine is on.

 

so it's the starter,hmm..... That makes sense... thanks alot guys..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedymon &raquo;</TD></TR><TR><TD CLASS="quote">Well the starter gets the crank going in that direction then the engine just continues on as the pistons fire.
The K series i THINK rotates clockwise. Or maybe they just turned the engine around.</TD></TR></TABLE>are you sure
i was thinking that maybe the cranks are different, and the distributer has to be different firing order, and maybe cams different

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g4drb17 &raquo;</TD></TR><TR><TD CLASS="quote">are you sure
i was thinking that maybe the cranks are different, and the distributer has to be different firing order, and maybe cams different</TD></TR></TABLE>
that would have no effect on rotation direction.

 

If you bolted on a starter that turned the oposite way, would the engine run backwards?

 

well i hope he's not tryin to put a different crank dirrection head on the same series block like a f20 s 2000 head on an f20 accord block(actually i hope someone tries it and it works) because i think those things might change, above posts make it sound like if you change the dirrection the starter turns the engine will run the opposite direction, which i don't think is true

 

what prompted me to ask this question? a while back i remember popping the clutch on my 90 civic si to start it (bad starter) Lucky for me i have to park on an incline. So i put the clutch in and let it roll back and let go the clutch and it started.
Is it possible to make your honda engine rotate clockwise on accident doing this. How could this hurt the engine?? this was only a one time thing


p.s. i think i was in 1st gear ,not reverse

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">
that would have no effect on rotation direction.</TD></TR></TABLE>
Engine rotation is determined by the cam and distributer firing order. If a motor was to spin the opposite way it would draw air in from the exhaust and the last time i checked, no fuel is delivered through the exhaust. The firing order would need to be moved 180 degrees and go backwords i believe, not 100% sure though. So if the orginal firing order was 1342, it would become 4312.

 

you could make a 2 stroke run backwards

 

does your engine run the opposite direction when youre usually in reverse?

lol, the engine still turns the same way whether youre going forward or reverse.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mexicutioner &raquo;</TD></TR><TR><TD CLASS="quote">
Engine rotation is determined by the cam and distributer firing order. If a motor was to spin the opposite way it would draw air in from the exhaust and the last time i checked, no fuel is delivered through the exhaust. The firing order would need to be moved 180 degrees and go backwords i believe, not 100% sure though. So if the orginal firing order was 1342, it would become 4312.</TD></TR></TABLE>
the cam doesnt actually make the engine turn though. obviously.
a cam is a cam is a cam. just differeent sized lump on metal round stock.

it is all controlled by the starter, hence the name. STARTER

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">
the cam doesnt actually make the engine turn though. obviously.
a cam is a cam is a cam. just differeent sized lump on metal round stock.

it is all controlled by the starter, hence the name. STARTER</TD></TR></TABLE>
yea but i think the most complex partof making an engine spin backwards is the cam.
i think apex made a car that used a b or h series and made it spin backwards..
pretty sure it was apex..
not completly sure tho

 

Let's take a B series engine for example. Assuming you put a reverse starter on it, the complete bottom end would not have to be touched. In the head, however, the cams would indeed need to change places as the lobe separation angles between the two at any given point are so extreme that the engine wouldn't be able to run. You would also need to notch the exhaust cam in order for the dizzy to fit but the firing order wouldn't change. You would need to mount the intake manifold and associated parts on the other side of the engine, so be prepared to fab up some coolant lines and a new flange as well as extend some wiring and possibly get a different throttle cable. The engine should run rather well with the only downfalls being the relative size of the valves on the now-intake and now-exhaust sides and the reversed agression of the cam profiles (unless of course you are using a symmetric profile).

 

Wow, this thread's amazing.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">The crank will usually rotate the same as the tires when moving foward. So it depends which side the engine is on.</TD></TR></TABLE>[satire]So if I want it to turn the opposite way, all I have to do is turn it around in the engine bay?[/satire]
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">If you bolted on a starter that turned the oposite way, would the engine run backwards?</TD></TR></TABLE>Based on all your other posts, I do believe you know the answer to that.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FIGARILA &raquo;</TD></TR><TR><TD CLASS="quote">what prompted me to ask this question? a while back i remember popping the clutch on my 90 civic si to start it (bad starter) Lucky for me i have to park on an incline. So i put the clutch in and let it roll back and let go the clutch and it started.
Is it possible to make your honda engine rotate clockwise on accident doing this. How could this hurt the engine?? this was only a one time thing</TD></TR></TABLE>If you rolled backward with the tranny in 1st, popped the clutch, the engine would spin backwards. But it can't start. You can sorta 'damage' it that way, basically by causing the timing belt to skip teeth.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FIGARILA &raquo;</TD></TR><TR><TD CLASS="quote">p.s. i think i was in 1st gear ,not reverse</TD></TR></TABLE>If so, it wouldn't have started.

 

and now you have 5 reverse gears and one forward...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drunknbass &raquo;</TD></TR><TR><TD CLASS="quote">
yea but i think the most complex partof making an engine spin backwards is the cam.
i think apex made a car that used a b or h series and made it spin backwards..
pretty sure it was apex..
not completly sure tho</TD></TR></TABLE>

your wrong the cam profile is the same forward and backward