how can i tell if Vtec is working?
03-19-2003, 06:15 PM
#1
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how can i tell if Vtec is working?
i swapped a d16z6 into my CX and i wired the vtec but i dont really know what its supposed to feel like and is there a way to test if its working or not? i feel a slight pickup at 6K rpms but i dont know what it is or not..
mike
mike
03-19-2003, 06:28 PM
#2
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Re: how can i tell if Vtec is working? (civicracer1993)
a z6 isnt a very big performance motor. the vtec engages at 4400~ and well.. you dont feel it.
i never felt it with my civic ex. once i put my b16 in, then you hear/feel it.
i never felt it with my civic ex. once i put my b16 in, then you hear/feel it.
03-19-2003, 08:09 PM
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Re: how can i tell if Vtec is working? (Kamin)
a z6 isnt a very big performance motor. the vtec engages at 4400~ and well.. you dont feel it.
i never felt it with my civic ex. once i put my b16 in, then you hear/feel it.
i never felt it with my civic ex. once i put my b16 in, then you hear/feel it.
03-20-2003, 06:00 AM
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Re: how can i tell if Vtec is working? (civicracer1993)
ok. but why would i feel an increase at like 6K ?
But you "should" be able to hear a distinct change in sound level at the VTEC activation point. (someone said 4400 rpms) What other mods do you have on it again? With an intake, you should be able to hear it more clearly.
03-20-2003, 06:08 AM
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Re: how can i tell if Vtec is working? (98CTRCoupe)
i have intake , exhaust , header , plug wires , thats it .. i dont know if it works or not.. i wish there was a way to tell for sure.
03-20-2003, 11:44 AM
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Re: how can i tell if Vtec is working? (civicracer1993)
If Vtec is working, your redline will be higher. I forget what a SOHC motor redlines at. 
If it isn't working then the motor willl redline the same as the DX motor.
If it isn't working then the motor willl redline the same as the DX motor.
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03-20-2003, 01:43 PM
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Re: how can i tell if Vtec is working? (Bryant)
a z6 isnt a very big performance motor. the vtec engages at 4400~ and well.. you dont feel it.
i never felt it with my civic ex. once i put my b16 in, then you hear/feel it.I know the feeling my Z6 i cant feel or hear it at all. But im sure with Exhuast and intake you probley could a little better.
i never felt it with my civic ex. once i put my b16 in, then you hear/feel it.I know the feeling my Z6 i cant feel or hear it at all. But im sure with Exhuast and intake you probley could a little better.
03-20-2003, 02:21 PM
#10
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Re: how can i tell if Vtec is working? (Trey)
If Vtec is working, your redline will be higher. I forget what a SOHC motor redlines at.
If it isn't working then the motor willl redline the same as the DX motor.
If it isn't working then the motor willl redline the same as the DX motor.
vtec has nothing to do with redline or rev limit.
[Modified by Kamin, 3:22 PM 3/20/2003]
03-20-2003, 04:52 PM
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Re: how can i tell if Vtec is working? (Kamin)
to my understanding...you're both wrong. sohc vtec motors do rev about 1000 rpm higher than non vtec sohcs,so it does effect redline... but i think that you are also correct that in the case of it working or not working on an already vtec motor, will not affect the redline. Best thing i can tell ya is that if you don't feel it at all, then it's probly not working...as for the pull at 6 grand, maybe those bolt on mods you named are doin something for ya.
03-20-2003, 05:43 PM
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Re: how can i tell if Vtec is working? (96 Civic LS)
ok . well i think its working.. at around 4-5ish i do hear like a slight whistling sound and it builds up till i shift.. i guess thats what it is.. like a real quiet turbo.. thanks for all the help.
mike
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03-20-2003, 08:59 PM
#15
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Re: how can i tell if Vtec is working? (96 Civic LS)
to my understanding...you're both wrong. sohc vtec motors do rev about 1000 rpm higher than non vtec sohcs,so it does effect redline... but i think that you are also correct that in the case of it working or not working on an already vtec motor, will not affect the redline. Best thing i can tell ya is that if you don't feel it at all, then it's probly not working...as for the pull at 6 grand, maybe those bolt on mods you named are doin something for ya.
vtec dosent affect redline.
they are diffrent motors, with diffrent redlines. and diffrent ecus.
wether vtec is working or not dosent affect how high it will rev.
03-21-2003, 06:23 AM
#16
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Re: how can i tell if Vtec is working? (Kamin)
Kamin, you are wrong.
I know for a fact that when Vtec isn't working, the redline is lowered. I had that problem on my B16a swap in an EF and when the codes were cleared, the Vtec worked, the redline was higher.
I know for a fact that when Vtec isn't working, the redline is lowered. I had that problem on my B16a swap in an EF and when the codes were cleared, the Vtec worked, the redline was higher.
03-21-2003, 09:57 AM
#17
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Re: how can i tell if Vtec is working? (Trey)
Kamin, you are wrong.
I know for a fact that when Vtec isn't working, the redline is lowered. I had that problem on my B16a swap in an EF and when the codes were cleared, the Vtec worked, the redline was higher.
I know for a fact that when Vtec isn't working, the redline is lowered. I had that problem on my B16a swap in an EF and when the codes were cleared, the Vtec worked, the redline was higher.
no i am not
i ran without vtec for 2 months on my b16 and no codes. still revved to 8300.
your revlimit was lower because your ecu was in limp mode from a code you were throwing.
i am NOT wrong about this. i know for 100% fact.
dont belive me?
go unplug your vtec solenid and run to 8000. i will bet you 25,000$ it will make it.
certan sensors not working will put the ecu into limp mode, MAP, CKP, etc. wich will then run the car with base fuel maps, no vtec and a 6000~ rev limit so you dont damage the motor.
vtec not working will NOT AFFECT THE REV LIMIT.
[Modified by Kamin, 11:02 AM 3/21/2003]
03-21-2003, 12:09 PM
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Re: how can i tell if Vtec is working? (Kamin)
your revlimit was lower because your ecu was in limp mode from a code you were throwing.
i am NOT wrong about this. i know for 100% fact.
i am NOT wrong about this. i know for 100% fact.
when i had my d16z6, i could NOT feel or 'hear' the vtec engagement...if you have no CEL, you should be all fine......
03-21-2003, 06:24 PM
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Re: how can i tell if Vtec is working? (civicracer1993)
My buddy of mine hooke up one of those srewdriver things that light up when they get power.Hook that up to the vtec solenoid and either rev it up or drive it and see if it lights up.I hope that helps.
03-21-2003, 09:18 PM
#22
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Re: how can i tell if Vtec is working? (J2turbo21)
My buddy of mine hooke up one of those srewdriver things that light up when they get power.Hook that up to the vtec solenoid and either rev it up or drive it and see if it lights up.I hope that helps.
vtec dosent work in neutral.
03-22-2003, 06:29 AM
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Re: how can i tell if Vtec is working? (civicracer1993)
This is really funny. I can't believe that some people call rev limit REDLINE.
The term REDLINE comes from the tachometer, where racers of old used to mark their tach face with a simple red line to know where their threshold of RPM was. Anything past this was to assume damage.
REV LIMIT is an electronic (or mechanical) means of limiting the actual maximum RPM. I have seen many, if not all cars hit rev limit AFTER red line.
FYI: did you know that before they had shift lights, old school racers made yellow lines on their tach faces to know when to shift? My father told me that was what it was for when I asked him as a child. He had a tachometer that was CABLE DRIVEN, and said in those days it was really popular to mark their shift points in multiple colors, for 1st, 2nd, and 3rd. If you had a 4th line on your tach, then you were either low geared, of top dog on the block.
Please, can we stop calling everything red line? I mean it is like calling Nitrous Oxide NAWSS. NOS is a Brand. Not the oxidizer itself. Like calling all gasoline EXXON. Calling all shoes NIKES... HAHA
Ok I am finished now...
(Solemn stare)
JM2CW with a slight rant
Scott 
The term REDLINE comes from the tachometer, where racers of old used to mark their tach face with a simple red line to know where their threshold of RPM was. Anything past this was to assume damage.
REV LIMIT is an electronic (or mechanical) means of limiting the actual maximum RPM. I have seen many, if not all cars hit rev limit AFTER red line.
FYI: did you know that before they had shift lights, old school racers made yellow lines on their tach faces to know when to shift? My father told me that was what it was for when I asked him as a child. He had a tachometer that was CABLE DRIVEN, and said in those days it was really popular to mark their shift points in multiple colors, for 1st, 2nd, and 3rd. If you had a 4th line on your tach, then you were either low geared, of top dog on the block.
Please, can we stop calling everything red line? I mean it is like calling Nitrous Oxide NAWSS. NOS is a Brand. Not the oxidizer itself. Like calling all gasoline EXXON. Calling all shoes NIKES... HAHA
Ok I am finished now...
(Solemn stare)
JM2CW with a slight rant
Scott
03-22-2003, 09:06 AM
#25
Honda-Tech Member
Re: how can i tell if Vtec is working? (CRneXt)
I know the diffrence between rev limit and redline but for simplicity ill talk the way they do.
like calling all 92-95 civics EG's.
like calling all 92-95 civics EG's.