How to disable vvt on sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ukyo01 · 02-08-2009, 10:27 PM

Hey everyone Im very sorry for starting a new thread, but I did a lot of searches and couldn't find the answer.

So could anyone chime in or direct me to a link on how to disable the vvt on a blacktop sr20det?

Reason is because it is awfully noisy, and I wanted to try to disconnect it to make sure that it is the source of the noise.

Thank you

*fliprayzin240sx* · 02-08-2009, 10:30 PM

You tried disconnecting the plug off the sensor?

ukyo01 · 02-08-2009, 10:32 PM

Could you tell me or show a picture where it is located?

Z33dori · 02-08-2009, 10:35 PM

272 cams

that is the best way

no but really, there is a big, huge sensor that plugs into the side of the head, right next to the intake manifold.

ukyo01 · 02-08-2009, 10:39 PM

Quote:

Originally Posted by Z33dori

272 cams

that is the best way

This completely overpasses vvt?

Ill definitely consider this option, but I can't afford that at the moment, and I also need to know how to temporarly disable the vvt to rule out the noise Im hearing.

cheers

Z33dori · 02-08-2009, 10:40 PM

no...

i edited my post with more helpful info.... i'll try and get u a pic if u need

ukyo01 · 02-08-2009, 10:43 PM

Ill take a look.

Ill post tomorrow if I cant find it.

Thank you for your help

Z33dori · 02-08-2009, 10:44 PM

here ya go

Teambadrun · 02-08-2009, 11:52 PM

why do you want to disconnet it?
it works great,
btw its VCT
Variable CAM timing

anyway, it gives better low to mid range power for easier driveability.
however id rip it out if your going to tune your car with big fu-k off cams

Z33dori · 02-09-2009, 02:12 AM

did u even read the thread?

articdragon192 · 02-09-2009, 02:17 AM

Quote:

Originally Posted by Teambadrun

why do you want to disconnet it?
it works great,
btw its VCT
Variable CAM timing

anyway, it gives better low to mid range power for easier driveability.
however id rip it out if your going to tune your car with big fu-k off cams

Quote:

Originally Posted by ukyo01

Hey everyone Im very sorry for starting a new thread, but I did a lot of searches and couldn't find the answer.

So could anyone chime in or direct me to a link on how to disable the vvt on a blacktop sr20det?

Reason is because it is awfully noisy, and I wanted to try to disconnect it to make sure that it is the source of the noise.

Thank you

Here's why.

Teambadrun · 02-09-2009, 03:09 AM

haha my bad.

djcobra · 02-09-2009, 07:55 AM

Define the noise please. If the noise is a continous rattle, then unplugging the VTC solenoid will do nothing. Your problem could be the VTC Sprocket, which will need to be replaced with a new one. They are known to go due to many reason, one could be low oil pressure, 2nd could be just basic wear and tear. If you want to completely elimnate this VTC while upgrading cams you'll have to install S13 cam (on the intake side) along with a S13 Sprocket w/bolt. Some cams are NVCS safe which allows you to retain the VTC, HKS, GReddy, and Tomei offer cams that allows you to keep the VTC. Quite honestly driving the car without the VTC sucks balls especially on the streets. If you want crazy top end and mainly for drag racing then VTC isn't really required. Fliprayzin240sx will always bash how bad the VTC and how useless it is, as i've seen from his previous posts, but everyone has their own opinion especially when it comes to driveability.

Steve.

Monooxide · 02-09-2009, 10:53 AM

Quote:

Originally Posted by Teambadrun

why do you want to disconnet it?
it works great,
btw its VCT
Variable CAM timing

anyway, it gives better low to mid range power for easier driveability.
however id rip it out if your going to tune your car with big fu-k off cams

It's actually VTC and it is Valve Timing Control.

I wouldn't disconnect/disable the VTC unless you're upgrading to cams that are incompatible with the system. It helps low end torque and continues out to over 5000 RPM, so this will be a big chunk of your torque throughout that RPM. This also would increase the RPM at where you reach full boost.

I have no 'noise' coming from my VTC and I have chosen to wire it in an use it with my Standalone as well. The noise could very easily be coming from your upper timing guide underneath the valve cover.

ukyo01 · 02-09-2009, 07:32 PM

Hey everyone, so I disabled it and took the car for a test drive, the noise is still there, so I connected it back.

The noise im experiencing is kind of like a high pitched rattle that sounds pretty random, and it happends between about 4800-7000 rpm.

I was thinking it could be a rattle coming from inside the dash at that certain rpm? but I definitly not know that for sure.

I'd appreciate if someone could try to help me out, the noise kind of comes on and off very quickly for random lenghts of time, is that what it would sound like if it was a vct problem? or would it be continious?

Z33dori · 02-09-2009, 07:59 PM

have some one stand out side, and drive by them in that rpm range.

also, does it only do it under load, or will it do it free revving. If it makes the sounds free reving, stand there and rev the motor off the throttle body and see if you can pin point the location.

s15specR · 02-09-2009, 08:19 PM

So clarify this, I have a set of s13 272's sitting and I have a s15 sr in the car, if I drop the s13 cams in I'll lose the VTC ? I've read on this forum that I need to cam gears ?

Z33dori · 02-10-2009, 02:17 AM

you will need the s13 intake cam gear.

tho i'm not 100% sure if S13 cams fit s14/15... but i don't see why they wouldn't

mikaelrules · 02-10-2009, 02:35 AM

For Tomei, they have different part numbers for S13 and S14 cams. However, there is only one part number for the cam sprocket.

Teambadrun · 02-10-2009, 02:40 AM

s13 cam gear fits, correct.

*fliprayzin240sx* · 02-10-2009, 02:43 AM

Quote:

Originally Posted by djcobra

Define the noise please. If the noise is a continous rattle, then unplugging the VTC solenoid will do nothing. Your problem could be the VTC Sprocket, which will need to be replaced with a new one. They are known to go due to many reason, one could be low oil pressure, 2nd could be just basic wear and tear. If you want to completely elimnate this VTC while upgrading cams you'll have to install S13 cam (on the intake side) along with a S13 Sprocket w/bolt. Some cams are NVCS safe which allows you to retain the VTC, HKS, GReddy, and Tomei offer cams that allows you to keep the VTC. Quite honestly driving the car without the VTC sucks balls especially on the streets. If you want crazy top end and mainly for drag racing then VTC isn't really required. Fliprayzin240sx will always bash how bad the VTC and how useless it is, as i've seen from his previous posts, but everyone has their own opinion especially when it comes to driveability.

Steve.

Excuse me? How did I bash it on this thread, hell, did you even read what I typed up?!?!

Well since you brought it up, i hate on it due to a couple of things. Most of them go bad. If you have one in the states, have you looked at how much these fuckers are to replace? Thats if you can even find them...

For as much money you'd spend to fix the fucking thing, your better off spending that money on upgrading something else.

I dont go around telling people to get rid of it when they work perfectly fine now do I?!?!

Quote:

Originally Posted by Z33dori

you will need the s13 intake cam gear.

tho i'm not 100% sure if S13 cams fit s14/15... but i don't see why they wouldn't

You can use S13 cams, most aftermarket VTC cams made for S14/15s have lower lift than their S13 counterparts. That would be the main advantage of going with S13 aftermarket cams, gives you the option to run more aggressive cam setups.

Z33dori · 02-10-2009, 02:49 AM

oh okay. I always wonder myself. thanks for the info

ukyo01 · 02-10-2009, 03:50 PM

Okay so I took a pretty extensive test drive and here is what happens:

The noise only appears in 1st and 2nd gear with heavy load, so if I only give it just over half throttle the engine will rev up through the rev range with no noise, so it only happens with heavy load, and when going through the other gears no noise either.

When free revving in neutral no noise either.

I am extremely puzzled, any help would be very appreciated.

Cheers

Sileighty_85 · 02-10-2009, 04:24 PM

Knock??

I had a friend with a similar issue

around 3.5-4K around crusing throttle he would get audiable knock until he pulled 5* timing

ukyo01 · 02-10-2009, 04:42 PM

It is not a knock, its more of a very rapid rattle almost a buzz?

Z33dori · 02-10-2009, 08:05 PM

it could still be knock, just light amount really fast.

but the buzzing makes me think diff. you might just have a loss stud/nut or something. it's really hard to say. u think u can make a vid?

rex2sx · 02-10-2009, 08:28 PM

If you have a noise and its coming from the head doesnt that mean maybe bad valvetrain? Guides, Seats, seal idk. You usually hear tapping form lack of oil. But if its really loud, im not sure what it could be.

ukyo01 · 02-10-2009, 10:12 PM

Its really hard to explain this noise, ill make a video and post it as soon as I can

ukyo01 · 02-15-2009, 11:25 PM

okay so I still dont have my camera so I wasnt able to make a video.

But I was thinking, the noise only appears under full throttle, so I was wondering if it could be the turbo?

There is absolutely no noise unless I don't give it a WOT.

So I guess my question is, if there was too much play in the turbo or whatever other problem it could have, would it be possible that the noise would only be audible under full boost?

DJ_Sunrise · 02-16-2009, 01:12 PM

take your car to a dyno. Whatever it is, it isn't your VTC.

-Bart

02-08-2009, 10:27 PM	#1
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	How to disable vvt on sr20det Hey everyone Im very sorry for starting a new thread, but I did a lot of searches and couldn't find the answer. So could anyone chime in or direct me to a link on how to disable the vvt on a blacktop sr20det? Reason is because it is awfully noisy, and I wanted to try to disconnect it to make sure that it is the source of the noise. Thank you

02-08-2009, 10:30 PM	#2
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	You tried disconnecting the plug off the sensor? __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

02-08-2009, 10:35 PM	#4
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	272 cams that is the best way no but really, there is a big, huge sensor that plugs into the side of the head, right next to the intake manifold. __________________

02-08-2009, 10:40 PM	#6
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	no... i edited my post with more helpful info.... i'll try and get u a pic if u need __________________

02-08-2009, 10:44 PM	#8
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	here ya go __________________

02-08-2009, 10:32 PM	#3
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	Could you tell me or show a picture where it is located?

02-08-2009, 10:43 PM	#7
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	Ill take a look. Ill post tomorrow if I cant find it. Thank you for your help

02-08-2009, 11:52 PM	#9
Teambadrun Zilvia Addict Join Date: Jan 2007 Location: Melbourne,Australia Age: 42 Posts: 642 Trader Rating: (1) Feedback Score: 1 reviews	why do you want to disconnet it? it works great, btw its VCT Variable CAM timing anyway, it gives better low to mid range power for easier driveability. however id rip it out if your going to tune your car with big fu-k off cams __________________

02-09-2009, 02:12 AM	#10
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	did u even read the thread? __________________

02-09-2009, 03:09 AM	#12
Teambadrun Zilvia Addict Join Date: Jan 2007 Location: Melbourne,Australia Age: 42 Posts: 642 Trader Rating: (1) Feedback Score: 1 reviews	haha my bad. __________________

02-09-2009, 07:55 AM	#13
djcobra Zilvia Junkie Join Date: Aug 2006 Location: Calgary Age: 42 Posts: 306 Trader Rating: (1) Feedback Score: 1 reviews	Define the noise please. If the noise is a continous rattle, then unplugging the VTC solenoid will do nothing. Your problem could be the VTC Sprocket, which will need to be replaced with a new one. They are known to go due to many reason, one could be low oil pressure, 2nd could be just basic wear and tear. If you want to completely elimnate this VTC while upgrading cams you'll have to install S13 cam (on the intake side) along with a S13 Sprocket w/bolt. Some cams are NVCS safe which allows you to retain the VTC, HKS, GReddy, and Tomei offer cams that allows you to keep the VTC. Quite honestly driving the car without the VTC sucks balls especially on the streets. If you want crazy top end and mainly for drag racing then VTC isn't really required. Fliprayzin240sx will always bash how bad the VTC and how useless it is, as i've seen from his previous posts, but everyone has their own opinion especially when it comes to driveability. Steve. __________________ S14 326 whp, 311 tq @ 15 psi HKS F-CON V-PRO Last edited by djcobra; 02-09-2009 at 07:57 AM.. Reason: edited...

02-09-2009, 07:32 PM	#15
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	Hey everyone, so I disabled it and took the car for a test drive, the noise is still there, so I connected it back. The noise im experiencing is kind of like a high pitched rattle that sounds pretty random, and it happends between about 4800-7000 rpm. I was thinking it could be a rattle coming from inside the dash at that certain rpm? but I definitly not know that for sure. I'd appreciate if someone could try to help me out, the noise kind of comes on and off very quickly for random lenghts of time, is that what it would sound like if it was a vct problem? or would it be continious?

02-09-2009, 07:59 PM	#16
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	have some one stand out side, and drive by them in that rpm range. also, does it only do it under load, or will it do it free revving. If it makes the sounds free reving, stand there and rev the motor off the throttle body and see if you can pin point the location. __________________

02-09-2009, 08:19 PM	#17
s15specR Zilvia FREAK! Join Date: Oct 2007 Location: USA Posts: 1,021 Trader Rating: (18) Feedback Score: 18 reviews	So clarify this, I have a set of s13 272's sitting and I have a s15 sr in the car, if I drop the s13 cams in I'll lose the VTC ? I've read on this forum that I need to cam gears ?

02-10-2009, 02:17 AM	#18
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	you will need the s13 intake cam gear. tho i'm not 100% sure if S13 cams fit s14/15... but i don't see why they wouldn't __________________

02-10-2009, 02:35 AM	#19
mikaelrules Join Date: Jul 2008 Location: Manila Posts: 15 Trader Rating: (0) Feedback Score: 0 reviews	For Tomei, they have different part numbers for S13 and S14 cams. However, there is only one part number for the cam sprocket.

02-10-2009, 02:40 AM	#20
Teambadrun Zilvia Addict Join Date: Jan 2007 Location: Melbourne,Australia Age: 42 Posts: 642 Trader Rating: (1) Feedback Score: 1 reviews	s13 cam gear fits, correct. __________________

02-10-2009, 02:49 AM	#22
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	oh okay. I always wonder myself. thanks for the info __________________

02-10-2009, 03:50 PM	#23
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	Okay so I took a pretty extensive test drive and here is what happens: The noise only appears in 1st and 2nd gear with heavy load, so if I only give it just over half throttle the engine will rev up through the rev range with no noise, so it only happens with heavy load, and when going through the other gears no noise either. When free revving in neutral no noise either. I am extremely puzzled, any help would be very appreciated. Cheers

02-10-2009, 04:24 PM	#24
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Knock?? I had a friend with a similar issue around 3.5-4K around crusing throttle he would get audiable knock until he pulled 5* timing __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

02-10-2009, 04:42 PM	#25
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	It is not a knock, its more of a very rapid rattle almost a buzz?

02-10-2009, 08:05 PM	#26
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 32 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	it could still be knock, just light amount really fast. but the buzzing makes me think diff. you might just have a loss stud/nut or something. it's really hard to say. u think u can make a vid? __________________

02-10-2009, 08:28 PM	#27
rex2sx Zilvia Member Join Date: Feb 2009 Location: pennsylvania Age: 30 Posts: 158 Trader Rating: (0) Feedback Score: 0 reviews	If you have a noise and its coming from the head doesnt that mean maybe bad valvetrain? Guides, Seats, seal idk. You usually hear tapping form lack of oil. But if its really loud, im not sure what it could be.

02-10-2009, 10:12 PM	#28
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	Its really hard to explain this noise, ill make a video and post it as soon as I can

02-15-2009, 11:25 PM	#29
ukyo01 Join Date: Feb 2009 Location: AB Posts: 27 Trader Rating: (0) Feedback Score: 0 reviews	okay so I still dont have my camera so I wasnt able to make a video. But I was thinking, the noise only appears under full throttle, so I was wondering if it could be the turbo? There is absolutely no noise unless I don't give it a WOT. So I guess my question is, if there was too much play in the turbo or whatever other problem it could have, would it be possible that the noise would only be audible under full boost?

02-16-2009, 01:12 PM	#30
DJ_Sunrise Zilvia FREAK! Join Date: Feb 2004 Location: NJ Age: 34 Posts: 1,134 Trader Rating: (1) Feedback Score: 1 reviews	take your car to a dyno. Whatever it is, it isn't your VTC. -Bart

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