do you have to have VCT connected on your s14? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Teambadrun · 06-13-2009, 10:20 PM

i was just thinking
what happends if you disconnect the plug for VCT. does the car play up and run shit because the actual VCT gear is still in the car?
if anyone knows that would be awsome

cheers

RPS13nutt · 06-13-2009, 10:43 PM

Never physically disconnected it, but using nissan datascan to disable it made it run shitty. Assume it would do the same if it was physical disco'd.
but have you done it yet to see what happens?

Your answer might be here: http://zilvia.net/f/tech-talk/23907-...sable-vtc.html

look at the 6th post

***S14DB*** · 06-13-2009, 10:48 PM

The solenoid stays retracted without power. No interference, Just laggy with VTC off.

jr_ss · 06-14-2009, 12:08 AM

Quote:

Originally Posted by S14DB

The solenoid stays retracted without power. No interference, Just laggy with VTC off.

Exactly. The VTC is there to increase low-end response and trq...

Teambadrun · 06-14-2009, 06:46 AM

just want to know because i destroyed the motor on my streeter the other day and now replaced it with another motor and never changed the cam gear back to S13, ( because i just run stock motors *(s14de + 1.8mm metal gasets) on my s13 daily with s13 loom so i can't run VCT or anything!) Tomorrow ill remove the vct gear and replace with a s13 one from my destroyed motor ! and let you guys know if thats why this things mega slow now!
Thanks

***S14DB*** · 06-14-2009, 02:54 PM

It's the Cam not the VCT that is causing the lag. The VCT advances the cam from idle to TQ peak. Your best bet is to swap the S13 intake cam with the gear.

jr_ss · 06-14-2009, 03:26 PM

The cam is exactly the same size as the exhaust... They didn't change the cam size, duration, or lift over the S13's. They simply implemented the VTC to help with low-end trq.

If you install the S13 cam gear, you should have a normal operating intake cam.

***S14DB*** · 06-14-2009, 04:42 PM

I though the S14's were 248/248 and the S13's were 256/248?

Teambadrun · 06-14-2009, 09:23 PM

Quote:

Originally Posted by S14DB

It's the Cam not the VCT that is causing the lag. The VCT advances the cam from idle to TQ peak. Your best bet is to swap the S13 intake cam with the gear.

haha nah man its not the cam.

LOL i have lots of these SR S14 DE's.

the intake cam on DE is the SAME it just has 0.75mm more lift on INTAKE.

the exhaust has same lift

they have 9degrees more duration then DET.

What i mean is, my car has jack shit power as if the valve is bent or something. I will compression test it before i chage the cam gear back to S13.

thanks anyway

Teambadrun · 06-14-2009, 09:25 PM

Quote:

Originally Posted by S14DB

I though the S14's were 248/248 and the S13's were 256/248?

nah.
sr20 = 240/240 9.0mm lobe lift

sr20de = 249 intake 9.75mm lift , exhaust = 249 9.0mm

did measuring on this to even see for myself lol

guitaraholic · 06-14-2009, 10:12 PM

So is it possible to use an Sr20de (FWD) say from a Sentra? I know you would need to grind down the pinons, but would they work with the VTC on an S14 sr20?

Teambadrun · 06-15-2009, 09:33 AM

Quote:

Originally Posted by guitaraholic

So is it possible to use an Sr20de (FWD) say from a Sentra? I know you would need to grind down the pinons, but would they work with the VTC on an S14 sr20?

sorry mate, i have no clue about sentras

you could probably ask more info on the sr20forum?

06-13-2009, 10:20 PM	#1
Teambadrun Zilvia Addict Join Date: Jan 2007 Location: Melbourne,Australia Age: 46 Posts: 642 Trader Rating: (1) Feedback Score: 1 reviews	do you have to have VCT connected on your s14? i was just thinking what happends if you disconnect the plug for VCT. does the car play up and run shit because the actual VCT gear is still in the car? if anyone knows that would be awsome cheers __________________

06-13-2009, 10:48 PM	#3
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	The solenoid stays retracted without power. No interference, Just laggy with VTC off. __________________ Comments should be taken as Opinions not as Statements of Fact

06-14-2009, 06:46 AM	#5
Teambadrun Zilvia Addict Join Date: Jan 2007 Location: Melbourne,Australia Age: 46 Posts: 642 Trader Rating: (1) Feedback Score: 1 reviews	just want to know because i destroyed the motor on my streeter the other day and now replaced it with another motor and never changed the cam gear back to S13, ( because i just run stock motors *(s14de + 1.8mm metal gasets) on my s13 daily with s13 loom so i can't run VCT or anything!) Tomorrow ill remove the vct gear and replace with a s13 one from my destroyed motor ! and let you guys know if thats why this things mega slow now! Thanks __________________

06-14-2009, 02:54 PM	#6
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	It's the Cam not the VCT that is causing the lag. The VCT advances the cam from idle to TQ peak. Your best bet is to swap the S13 intake cam with the gear. __________________ Comments should be taken as Opinions not as Statements of Fact

06-14-2009, 03:26 PM	#7
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,415 Trader Rating: (35) Feedback Score: 35 reviews	The cam is exactly the same size as the exhaust... They didn't change the cam size, duration, or lift over the S13's. They simply implemented the VTC to help with low-end trq. If you install the S13 cam gear, you should have a normal operating intake cam. __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

06-13-2009, 10:43 PM	#2
RPS13nutt Join Date: Oct 2005 Location: J'ville/ FLA Age: 43 Posts: 45 Trader Rating: (0) Feedback Score: 0 reviews	Never physically disconnected it, but using nissan datascan to disable it made it run shitty. Assume it would do the same if it was physical disco'd. but have you done it yet to see what happens? Your answer might be here: http://zilvia.net/f/tech-talk/23907-...sable-vtc.html look at the 6th post

06-14-2009, 04:42 PM	#8
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	I though the S14's were 248/248 and the S13's were 256/248? __________________ Comments should be taken as Opinions not as Statements of Fact

06-14-2009, 10:12 PM	#11
guitaraholic Zilvia Junkie Join Date: Jun 2006 Location: Spanish Fort, AL Posts: 430 Trader Rating: (0) Feedback Score: 0 reviews	So is it possible to use an Sr20de (FWD) say from a Sentra? I know you would need to grind down the pinons, but would they work with the VTC on an S14 sr20?