Jump to content
SAU Community

Quick Question R33 Gtr Does It Have Vtc?

Badgaz

By Badgaz,
in Engines & Forced Induction

 Share

Recommended Posts

  • Replies 52
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

iruvyouskyrine
iruvyouskyrine

There is a guy in Melbourne who has retrofitted 25 (iirc) VCT onto a 26. Look up 'down and out' car club in Facebook. Silver R32.

Ben C34
Ben C34

An rb30 with vct!

Posted Images

MJTru Mentor

MJTru

Posted
Posted

That's so cool. Sounds like I'll give it a try one day. I like the ideas of how it sounds guys. A whole 50 degrees. Yep that would help the response for sure. I just don't like the price of the hks unit. Also the fact that it's variable was a good point to bring up. I'll definitely check this out for my future street gtr. Retro fitting the the VQ25 until to fit that also interesting idea. Has anyone seen this done. If it can even be done at half the price would be a good new topic to start.

scotty nm35 Grand Master

scotty nm35

Posted
Posted

It could almost be done for free if you had the tools. Tuning it may be a little harder. Not sure if you would need the cam position sensor for feedback...

It has never even been looked at afaik.

jjman Mentor

jjman

Posted
Posted

As sweet as it sounds in theory, in reality I bet it would be an overly expensive mod that would make tuning more difficult as well as bring up problems and gremlins.

If it was me id spend the money on really good turbos that best suit the desired outcome, other supporting mods (good actuators, ebc, pipes etc) as well as really good tuning.

scotty nm35 Grand Master

scotty nm35

Posted
Posted

As sweet as it sounds in theory, in reality I bet it would be an overly expensive mod that would make tuning more difficult as well as bring up problems and gremlins.

If it was me id spend the money on really good turbos that best suit the desired outcome, other supporting mods (good actuators, ebc, pipes etc) as well as really good tuning.

If it were me it would cost nothing to set it up mechanically. I just have no idea how to actuate it properly.

VCT on the other hand is easy to actuate.

You can set your cams up however you like, but you can never have response and power, just something in between. If you had driven my car with the cams actuating then not, you would realise the difference 40 degrees advance/retard makes to efficiency and spool.

You could always put an RB25neo in there. :P

scotty nm35 Grand Master

scotty nm35

Posted
Posted

As we have discussed, that is a kit to hand it to you on a plate. All you need is a VCT actuator and a good fabricator/engineer to shove it in there, no need to spend 7k unless you wanted to sell multiple kits off yourself.

Ben C34 Grand Master

Ben C34

Posted
Posted

meh, who needs vct when you have 3L!

esp a built 3L with E85 n a sweet turbo on it!

Do you have a 3l?

I have a 2530 neo in my stage a and there's no way I would do without vct.

jjman Mentor

jjman

Posted
Posted (edited)

no but iv driven one (25/30) a bit that was fully built, very well tuned and putting down 500hpatw.

I couldn't complain about the torque curve at all... now thinking back I cannot remember if it did or did not have the VCT. maybe it did...

but this is a slightly different equation. as the OP was regarding GTRs with VCT. For a 25 head and the fact it was already there I would indeed put the effort in to retain it, even in a 2530 build. For GTR's /26 head, and the cost of getting it in and working, no I would not. Hence saying I would spend the money on some other aspects of the car.

Edited by jjman
scotty nm35 Grand Master

scotty nm35

Posted
Posted

Response is a pretty big aspect of how a car drives. It would help with midrange response and power which is worth more imo than top end on a road car. What if it could be done for $500, would it be worth it then? Perhaps someone should look into it further and work out exactly what's needed, and what it would cost to be made in bulk. The market is definitely there for a short production run I would think, especially if the positive results could be proven. If I had a head here I would look into it myself.

I guess it comes down to how cashed up you are, and how early you want the 26 to spool.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The Bogan
      NC MX5

      By The Bogan · Posted

      Yeah, plenty of air flow, there is a dedicated path that feeds the air in to the OEM intake tube behind the bumper As for a "tangible effect", maybe, but getting the pod/intake air out of the hot engine bay is worth it psychologically to me, even if it gives no performance difference, so the tangible effect in my Lizard brain saysss yessss  In the end, to me a tangible effect isn't always about performance, sometimes it a sound or a look, or even a...... feeling  Ooga-Chaka Ooga-Ooga Ooga-Chaka Ooga-Ooga Ooga-Chaka Ooga-Ooga Ooga-Chaka Ooga-Ooga
    • Duncan
      RB20DE NEO smallbox clutch.

      By Duncan · Posted

      yeah first and reverse is where you will find clutch release issues (whether hydraulic or mechanical) because the difference in revs required is the highest there; particularly changing down from 2nd to 1st when still moving. To be clearer though, it is possible that the clutch release bearing is the wrong height. This is less likely than a hydraulic issue but it is not unheard of when you are mixing and matching
    • Duncan
      NC MX5

      By Duncan · Posted

      Quite right, if you make it to that pension you deserve every cent
    • jtha7
      Replacing turbo water line - any recommendations or advice?

      By jtha7 · Posted

      Hi all, Restoring r33 series 1 rb25det. All the heater hoses were on their way out, have replaced them and put it all back together. After testing I noticed a small leak from behind the head on the actual metal water line to the turbo when cars warm. I tried running a longer hose over it but it kept leaking...   I am about to take the (stock) manifold off again😔 to change the water line does any one have any lines they recommend? I was looking at Aeroflow Turbo Oil & Water Line Set but not sure what everyone else recommends. Car is completely stock but want to upgrade turbo eventually. it looks like ill have to disconnect a lot just to replace these lines so if there's anything else recommended to do please let me know. Thank you in advance!
    • MBS206
      RB20DE NEO smallbox clutch.

      By MBS206 · Posted

      From memory, on the R33 GTSt at least, while everyone says "It's not adjustable", I found when I changed clutches in mine, it just needed a small adjustment on the rod length. But be very wary here, as you could end up trying to push the pushrod in the master too far, or blowing out the slave.   Most likely though, if the master/slave isn't bypassing internally or leaking out, then the throw out is the wrong height compared to the fingers on the clutch, so when it moves to disengage the clutch, it isn't 100% disengaged. You can check part of this out too by jacking the car up, having the engine running, put your foot on the clutch and try to engage 1st gear. If it goes in pretty easy (Compared to the ground) and/or the wheels start turning a fair bit and it takes a bit too much brake pedal to bring them back to a stop, this is likely the issue.  I'm not sure if you can adjust the height of the forks etc in these though, it's been that long since I've touched any RB gearbox.
×
×
  • Create New...