does this mean that... (regarding VTEC engagement)
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does this mean that... (regarding VTEC engagement)
okie dokie in my efforts to find a way to have an LED indicator for the engagment at 4500 rpm (around peak torque), i finally came across something (crosses fingers)
reading this article (http://www.7thgencivic.com/forums/sh...d.php?t=188161) "SOHC VTEC Explained," it says that:
Here are the specs on what it takes to activate VTEC
1 Your MAP (Manifold Absolute Pressure) sensor must read 0hg (aka 0 inches of vacuum). When it reads this it will send a 3volt signal to the ECU.
2. Your throttle has to be open 100% because your TPS sensor has to send a 4.5-volt signal to the ECU.
3. Your coolant temp has to be at running temp.
4. Vehicle speed has to be above 20mph.
5. You have to have 65-80 oil psi.
6. The engine must be running at a minimum of 4500 RPM
When all of this happens your ECU sends a 12-volt signal to your VTEC solenoid. does "When all of this happens your ECU sends a 12-volt signal to your VTEC solenoid." specifically mean that when all these parameters are met (therefore engaging the secondary lifters), does it mean that the signal in the VTEC signal wire from the ECU (green w/ yellow stripe) has a 12v signal running through it?
thats all i need clarified...
thanks!
wait, if the above is true (if the VTEC signal wire gets 12v when VTEC is engaged), then why does an LED tapped into that line engage 2600-3200 rpm? well, from what i think, would it be because there is a signal of increasing voltage as the RPM's rise? (for instance at 4000rpm, there's a signal to the VTEC solenoid via this green wire, but its not at 12v?)
reading this article (http://www.7thgencivic.com/forums/sh...d.php?t=188161) "SOHC VTEC Explained," it says that:
Here are the specs on what it takes to activate VTEC
1 Your MAP (Manifold Absolute Pressure) sensor must read 0hg (aka 0 inches of vacuum). When it reads this it will send a 3volt signal to the ECU.
2. Your throttle has to be open 100% because your TPS sensor has to send a 4.5-volt signal to the ECU.
3. Your coolant temp has to be at running temp.
4. Vehicle speed has to be above 20mph.
5. You have to have 65-80 oil psi.
6. The engine must be running at a minimum of 4500 RPM
When all of this happens your ECU sends a 12-volt signal to your VTEC solenoid.
thats all i need clarified...
thanks!
wait, if the above is true (if the VTEC signal wire gets 12v when VTEC is engaged), then why does an LED tapped into that line engage 2600-3200 rpm? well, from what i think, would it be because there is a signal of increasing voltage as the RPM's rise? (for instance at 4000rpm, there's a signal to the VTEC solenoid via this green wire, but its not at 12v?)
Last edited by skarteez; Feb 24, 2005 at 01:27 AM.
Once boosted now i-VTEC
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Originally Posted by skarteez
okie dokie in my efforts to find a way to have an LED indicator for the engagment at 4500 rpm (around peak torque), i finally came across something (crosses fingers)
reading this article (http://www.7thgencivic.com/forums/sh...d.php?t=188161) "SOHC VTEC Explained," it says that:
Here are the specs on what it takes to activate VTEC
does "When all of this happens your ECU sends a 12-volt signal to your VTEC solenoid." specifically mean that when all these parameters are met (therefore engaging the secondary lifters), does it mean that the signal in the VTEC signal wire from the ECU (green w/ yellow stripe) has a 12v signal running through it?
thats all i need clarified...
thanks!
wait, if the above is true (if the VTEC signal wire gets 12v when VTEC is engaged), then why does an LED tapped into that line engage 2600-3200 rpm? well, from what i think, would it be because there is a signal of increasing voltage as the RPM's rise? (for instance at 4000rpm, there's a signal to the VTEC solenoid via this green wire, but its not at 12v?)
reading this article (http://www.7thgencivic.com/forums/sh...d.php?t=188161) "SOHC VTEC Explained," it says that:
Here are the specs on what it takes to activate VTEC
does "When all of this happens your ECU sends a 12-volt signal to your VTEC solenoid." specifically mean that when all these parameters are met (therefore engaging the secondary lifters), does it mean that the signal in the VTEC signal wire from the ECU (green w/ yellow stripe) has a 12v signal running through it?
thats all i need clarified...
thanks!
wait, if the above is true (if the VTEC signal wire gets 12v when VTEC is engaged), then why does an LED tapped into that line engage 2600-3200 rpm? well, from what i think, would it be because there is a signal of increasing voltage as the RPM's rise? (for instance at 4000rpm, there's a signal to the VTEC solenoid via this green wire, but its not at 12v?)
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From: warren ohio
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see, i dont know if i agree with all of that... because, it seems that mine activates only on these requirements..
a. rpm
b. oil pressure
c. engine temp.... but kind of goes along with oil pressure.
if i take 5th up to about 7grand ( 140mph) and let off the gas, closing my throttle body, and let the drag slow my car down ill stay in vtec till about 5,000rpms..... and if i go to 4,000 and hit the gas, it will engage at 4,400...
even under part throttle. if im between 4400 and 8300... no matter what throttle i give it, its activated...no if this pressure is meet or this or that...
or is that cuae i have a difference engine? i have b18c jdm?
also, saying your car needs to be going 20mph is kind of redundant....since the speedo is linked to your front tires... and if your in first, you will be above 4,400 at 20mph....
also, if i sit at a light... i cant hold the rear brake and spin my front tires witht he lsd... and sit there at 4000 and then hit 6000 and vtec will engage...
i dont think your car cares about going 20mph, i think its just rpm...
ive also sat in neutral and reved it and activated vtec....
a. rpm
b. oil pressure
c. engine temp.... but kind of goes along with oil pressure.
if i take 5th up to about 7grand ( 140mph) and let off the gas, closing my throttle body, and let the drag slow my car down ill stay in vtec till about 5,000rpms..... and if i go to 4,000 and hit the gas, it will engage at 4,400...
even under part throttle. if im between 4400 and 8300... no matter what throttle i give it, its activated...no if this pressure is meet or this or that...
or is that cuae i have a difference engine? i have b18c jdm?
also, saying your car needs to be going 20mph is kind of redundant....since the speedo is linked to your front tires... and if your in first, you will be above 4,400 at 20mph....
also, if i sit at a light... i cant hold the rear brake and spin my front tires witht he lsd... and sit there at 4000 and then hit 6000 and vtec will engage...
i dont think your car cares about going 20mph, i think its just rpm...
ive also sat in neutral and reved it and activated vtec....
Last edited by gsrchad; Feb 25, 2005 at 01:39 AM.
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