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View Full Version : do you have to have VCT connected on your s14?

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 :newbie:

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-why-disable-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
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
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 :bigok:
Teambadrun
06-14-2009, 09:25 PM
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
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?