Jump to content
SAU Community

Dumb Ass Question - Tripple Turbo GTR Possible?

iNCOGNiTO
 Share

Recommended Posts

iNCOGNiTO Enthusiast

iNCOGNiTO

Posted
Posted

After driving Xboy's GTR, the turbines kick in at around 3500rpm, and boy do they kick in :) however until you get there it's a little dead. So would it be possible to put a third small turbo or even supercharger to cover say 1500-3000rpm or so?

I've driven the Liberty B4 and the power comes on rather early <2000rpm with the first turbine, then the second at around 4000rpm.

My extreamly limited knowledge of car mechanics would say why not put a third smaller turbo on the GTR, I've heard of supercharged twin turbos on small cc engines, why not on a larger engine or even a tripple turbo? I am assuming that this concept is either ridiculas for some reason otherwise somone else would have done it?

hippy Grand Master

hippy

Posted
Posted

well i dont' know if it really is possible .. i'd say no .. but i'm no expert .. if u wanted it to kick in earlier i'd say the choice of the turbos are more important along with the tune ... i'm sure the turbos can reach boost earlier .. say 2.5krpm with the right settings ..

EnricoPalazzo Grand Master

EnricoPalazzo

Posted
Posted

It would be a bitch to design as the small turbo would have to ajoin the plenum of the 2 big turbos. PLus the constraints of the room in the engine bay, plus pipin to intercooler, i doubt in practice it would ever work, however in theory it would.

Anymore questions

predator Grand Master

predator

Posted
Posted

The GTR's aren't sequential.. so you're probably out of luck with what you suggest.. maybe more appropriate on a TT Supra where its a sequential setup.

See the Liverty is sequential.. so its been designed as a refined daily driver and just driving around on boost most of the time with power always ontap across the range via two smaller turbos.

What you're experiencing on the GTR isn't a "gap" in the range, its just how its engineered as a non-sequential twin turbo setup.. to give full kick when you really need it - that is mid to high range power.

I think there was a concept RB26DETT motor with a supercharger (its posted on here somewhere).. it wasn't in a car for some reason.. I think it had to do with basically just fitting - as the supercharger pushed the width of the engine out too far to fit in an engine bay. Anybody correct me as to why they couldn't get it in a car??

rb25 Grand Master

rb25

Posted
Posted

NASA developed a 4million horsepower engine with one VERY large turbo feeding into another large single turbo, then that feeds 2 x smaller twin turbos (all in sequence) and makes 400psi boost. They now use these engines in their planes that fly on the edge of the atmosphere or statosphere. The turbos are 4 times the size of the engine itself, which is no bigger than a 4 cyl engine....

Also, I can't remember who, someone on here will, but a rally car driver had a Delta S4 which was supercharged and turbocharged. Best of both worlds....

My 25 to 30cents worth

Guest MFX_R33

Guest MFX_R33

Posted
Posted

Twin charging is alot of stuffing around for very little gain. If you are getting good boost by 3000rpm that is fine. All you need to do is to adjust your driving style. With a redline of 8000 (you could even push further than that), you have a rev range of 5000rpm. That is quite a good useable rev range for most driving.

Jeff.

iNCOGNiTO Enthusiast

iNCOGNiTO

Posted
  • Author
Posted

Yes it is a bit of a dreamer idea. but thought I'd check it out. Looks like the concept is fine, and a suprecharger would be the way to go, if it would fit :(

Don't mind having the power up in the higher rev range, but would like a bit more down low for just "normal" driving. Would be ideal as you could then have nice progressive power with the option to give it boot when you want to really bring it on :D

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by rb25

NASA developed a 4million horsepower engine with one VERY large turbo feeding into another large single turbo, then that feeds 2 x smaller twin turbos (all in sequence) and makes 400psi boost. They now use these engines in their planes that fly on the edge of the atmosphere or statosphere. The turbos are 4 times the size of the engine itself, which is no bigger than a 4 cyl engine....

Also, I can't remember who, someone on here will, but a rally car driver had a Delta S4 which was supercharged and turbocharged. Best of both worlds....

My 25 to 30cents worth

big boats use the same system feeding compressed air from 1 turbo into another in another etc

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

    • sunsetR33
      Replacing turbo water line - any recommendations or advice?

      By sunsetR33 · Posted

      One thing I can tell you is, do it properly the first time. If you encounter unexpected problems just let the car sit for a week or two if you have to get some other parts or figure stuff out.  I'd have said go and use as many OEM parts as possible but since you want to change the turbo later on a custom kit is probably the better choice. Since I have no experience with RB25 just compare parts diagrams and images before buying a line kit and it should be easy to see if it has everything you need. Amayama has very good parts diagrams and part number lists, that is what I used a bunch to figure out what I might need. And don't forget to plan ahead and possibly renew other stuff that's easy to get to while you're in there doing the turbo lines. Happy wrenching
    • sunsetR33
      Unpeeling the Orange

      By sunsetR33 · Posted

      Update 4:   Hi all, good news. Engine is running and all the gaskets and seals seem to be working as intended. No leaks so far, even the JB Weld seems to hold. I flushed out the old coolant a few times and put in fresh coolant, not Nissan stuff, I decided to try the Ravenol Protect FL22, they claim it works for a wide variety of JDM cars and the opinions on it by some people were pretty good. And it has the nice poison green color! And man am I glad I bought a coolant system tester earlier this year, vacuum filling works wonders on this engine. I can definitely recommend this to anyone still doing it the old school way. All you need is compressed air supply. Will have to do a small test drive as soon as I can, I removed the gauge cluster again as the tacho needle was still bouncing around a bit but it was much better than before already.  I also found some cracks on all 4 tires inner and outer sidewalls. Apparently these tires should 't be parked on for extended periods or be kept under 0 degrees during storage, which I did not know. Clearly the previous owner didn't look into those details either, he probably bought them just cause they are cool semi-slicks. I'm just wondering how tf I am supposed to reach 30-80 degree tire temperatures on the public road consistenly, these tires were never going to work for my use case. I'll probably order Continental SportContact7 ones as these are the best allround summer tire available right now and I don't think I'll need anything crazier for now. Do let me know if you have experience with various tires and which ones you recommend.
    • sunsetR33
      Unpeeling the Orange

      By sunsetR33 · Posted

      You have no idea how many goddamn boxes I received these past three months haha Most have been put to use by now though, luckily
    • sunsetR33
      Unpeeling the Orange

      By sunsetR33 · Posted

      Not going to pretend I didn't do a bit of junky work this time around, but mostly due to the fact that some things I am not willing to spend days fixing right now, like wiring. I try to do most things properly the first time around.
    • sunsetR33
      Unpeeling the Orange

      By sunsetR33 · Posted

      Regardless of neglect or incompetence, fixing either is tedious and annoying. Most of the neglect on my car is definitely rust. I hope I can at least pass inspections later on and they won't fail the car due to slightly corroded hardlines. I was generous with rust converter and wax and it looks ok, most lines in the rear are hard to see properly anyways.  Definitely will test them though to make sure they don't rupture under pressure, in that case the car isn't going anywhere this year.
×
×
  • Create New...