VTEC in neutral?
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From: usa
Re: VTEC in neutral? (sledgehammer)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sledgehammer »</TD></TR><TR><TD CLASS="quote">Nope, from what i've read around here it engages when there is a load on the engine.</TD></TR></TABLE>
yep. the engine has to be warm too.
yep. the engine has to be warm too.
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Re: VTEC in neutral? (sledgehammer)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sledgehammer »</TD></TR><TR><TD CLASS="quote">Nope, from what i've read around here it engages when there is a load on the engine.
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Correct... on a stock ECU. But if you have a program like Mugen, then VTEC will engage with no load on the car (revving it in your garage). It was a good way to find out the valve/piston clearance on my old (like back in 1998) LS/VTEC motor with stock B18A block and putting in Type R cams. With the cam timing advanced too much, the valves hit the pistons and it made a very loud, obnoxious sound but this was just by revving it past 4500 rpms in neutral to make sure before we took it out on the road and drove it with a load on the motor.... good thing too or we'd say bye bye to the valves.
</TD></TR></TABLE>
Correct... on a stock ECU. But if you have a program like Mugen, then VTEC will engage with no load on the car (revving it in your garage). It was a good way to find out the valve/piston clearance on my old (like back in 1998) LS/VTEC motor with stock B18A block and putting in Type R cams. With the cam timing advanced too much, the valves hit the pistons and it made a very loud, obnoxious sound but this was just by revving it past 4500 rpms in neutral to make sure before we took it out on the road and drove it with a load on the motor.... good thing too or we'd say bye bye to the valves.
mugen program ownz
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From: Memphis, Tn, USA
Re: (liam821)
yep, when in neutral my car can go vtec, if youve got a vafc (i do) or anything that interupts the vtec signal, it will overide the computer and will hit vtec anytime you reach the set rpm 
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Joined: Nov 2002
Posts: 48
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From: Around Berks County, PA, USA
Re: (dantastic)
Yes it most certainly does. The engine doesn't know or care what gear its in, as long as there is a load on it, creating high oil pressure.
So basically the criteris for VTEC is this:
If engine = warm AND
oil pressure >= threshhold AND
RPM >= 5500 THEN
Activate VTEC
So basically the criteris for VTEC is this:
If engine = warm AND
oil pressure >= threshhold AND
RPM >= 5500 THEN
Activate VTEC
Joined: Sep 2003
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From: nor, cal, usa
Re: VTEC in neutral? (B18cEK)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18cEK »</TD></TR><TR><TD CLASS="quote">I know this is a stupid question, but its been buggin me lately. Does VTEC engage in neutral? It doesn't matter really, just wanted to know.</TD></TR></TABLE>
on a normal ecu, in addition to a few other signals (temp, oil), it requires like a 15-20 mph signal on vss - has nothing to do with 'load'.
on a normal ecu, in addition to a few other signals (temp, oil), it requires like a 15-20 mph signal on vss - has nothing to do with 'load'.
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From: USA
Re: (RichXKU)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RichXKU »</TD></TR><TR><TD CLASS="quote">You can mess up a tranny in any gear if you force it, but driving fast in reverse at any speed will not damage a transmission.</TD></TR></TABLE>
Well, in an auto tranny it can make a bad burning smell.
We got my friends base auto rsx up to 34 mph in reverse in an empty parking lot. It sounded like a giant turbo spooling.
Well, in an auto tranny it can make a bad burning smell.
We got my friends base auto rsx up to 34 mph in reverse in an empty parking lot. It sounded like a giant turbo spooling.
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From: Santa Barbara, California, usa
Re: VTEC in neutral? (Newman)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Newman »</TD></TR><TR><TD CLASS="quote">
Correct... on a stock ECU. But if you have a program like Mugen, then VTEC will engage with no load on the car (revving it in your garage). It was a good way to find out the valve/piston clearance on my old (like back in 1998) LS/VTEC motor with stock B18A block and putting in Type R cams. With the cam timing advanced too much, the valves hit the pistons and it made a very loud, obnoxious sound but this was just by revving it past 4500 rpms in neutral to make sure before we took it out on the road and drove it with a load on the motor.... good thing too or we'd say bye bye to the valves.</TD></TR></TABLE>
not good...thats scary...its doesnt take much to bend valves.....dont do that again
Correct... on a stock ECU. But if you have a program like Mugen, then VTEC will engage with no load on the car (revving it in your garage). It was a good way to find out the valve/piston clearance on my old (like back in 1998) LS/VTEC motor with stock B18A block and putting in Type R cams. With the cam timing advanced too much, the valves hit the pistons and it made a very loud, obnoxious sound but this was just by revving it past 4500 rpms in neutral to make sure before we took it out on the road and drove it with a load on the motor.... good thing too or we'd say bye bye to the valves.</TD></TR></TABLE>
not good...thats scary...its doesnt take much to bend valves.....dont do that again
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From: Mustafar
Re: VTEC in neutral? (Newman)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Newman »</TD></TR><TR><TD CLASS="quote">It was a good way to find out the valve/piston clearance on my old (like back in 1998) LS/VTEC motor with stock B18A block and putting in Type R cams. With the cam timing advanced too much, the valves hit the pistons and it made a very loud, obnoxious sound but this was just by revving it past 4500 rpms in neutral to make sure before we took it out on the road and drove it with a load on the motor.... good thing too or we'd say bye bye to the valves.</TD></TR></TABLE>
Claying is a "good way" to determine valve/piston clearances -- that method was most certainly not.
Claying is a "good way" to determine valve/piston clearances -- that method was most certainly not.
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From: bay area
Re: (RichXKU)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RichXKU »</TD></TR><TR><TD CLASS="quote">I also forgot about the speed sensor needing input as well. If the vehicle speed sensor is damaged or disconnected, VTEC won't engage.</TD></TR></TABLE>
truth to this?
truth to this?
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From: SoCal
Re: VTEC in neutral? (Newman)
[QUOTE=Newman]
Correct... on a stock ECU. But if you have a program like Mugen, then VTEC will engage with no load on the car (revving it in your garage). QUOTE]
yup, im using a mugen p28 and when the car is warm and i rev it in nutrual it hits vtec.
Correct... on a stock ECU. But if you have a program like Mugen, then VTEC will engage with no load on the car (revving it in your garage). QUOTE]
yup, im using a mugen p28 and when the car is warm and i rev it in nutrual it hits vtec.
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From: Nashville, TN, USA
Re: (jdmsiR20)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmsiR20 »</TD></TR><TR><TD CLASS="quote">
truth to this?</TD></TR></TABLE>
if the ECU is stock. Yes.
truth to this?</TD></TR></TABLE>
if the ECU is stock. Yes.
