Jump to content
SAU Community

New Internal Gated T3 Housings.

simpletool

By simpletool,
in Engines & Forced Induction

 Share

Recommended Posts

Cubes Grand Master

Cubes

Posted
Posted

3lit3 32,

They also have the .63, .82 internal gate now also. ;)

Have a look through the thread, disco posted a few pics of the .82 and skinny .63 internal gate gt35r turbine housings. He grabbed the pics from GCG.

http://www.skylinesaustralia.com/forums/in...=134033&hl=

GT35r .63

and the .63 int wastegate

GT35R .82

and the .82 int wastegate

Unsure if the int gate gt30's turbine housings from 'garrett' are floating around yet or not.

The Dan Grand Master

The Dan

Posted
Posted
3lit3 32,

They also have the .63, .82 internal gate now also. ;)

Have a look through the thread, disco posted a few pics of the .82 and skinny .63 internal gate gt35r turbine housings. He grabbed the pics from GCG.

GT35r .63

and the .63 int wastegate

GT35R .82

and the .82 int wastegate

Unsure if the int gate gt30's turbine housings from 'garrett' are floating around yet or not.

Yeah I know all the different models available, my rep showed me all samples the day the turbo was available. They are a great setup but you still have to go to the trouble of changing the dump, oil and water hoses and intake. The only difference is you save money on not having to buy an external wastegate. They are limited in their flow and response due to the internal gated setup but make for a great upgrade on the 25's. Definately wouldn't recommend one of these on a 20 unless you have some major port work and other head work done.

If anyone is chasing one of these turbo, let me know. I should be able to beat anyone's price.

Cubes Grand Master

Cubes

Posted
Posted

How does internal gate reduce response?

dangerman4's gt35r appears to be doing quite well on his rb25 with an auto sitting behind it. Spools damn well, considerably better than I expected. We saw 5psi at 3000rpm and its all in by 4200rpm!!

But yes the GT30 is the limit for the RB20 I feel.. GT35r is simply too big.

discopotato03 Grand Master

discopotato03

Posted
Posted (edited)

I imagine the only way any waste gate could affect the spool phase is it were not sealed shut . All the exhaust gas needs to be going through the turbine at this stage to get it up to speed .

How well the IW performs I don't know , it seems obvious that the lower the exhaust housing AR the sooner boost pressure should reach the actuators opening pressure and open the valve (assumes all else engine wise being equal ) .

The XR6's turbo actually used a smaller series ie TO4E rather than TO4S comp cover/backplate probably because Ford wanted to artificially limit how much air the compressor could pump and make the waste gate regulator (actuator) very sensitive . It was after all a low boost OEM application .

So they use a large exhaust housing AR (1.06) and a smaller series comp cover in only .50AR to limit airflow . Under these conditions the IW seemed to work ok on a 4L six .

As I've said in the past I would not use the .63AR exhaust housing on a GT3076R or a GT3582R because the exhaust restriction , once it gets going , eventually cancells out the advantage of the high flowing large trim compressors in both cases . Some unique cases such as the real GT3071R would be ok with a 63 housing but thats because they use a smaller (71mm vs 76mm) compressor and need the revs (turbo) to make them work .

Also you may never see them but bush bearing Garrett GT turbos such as the GT3571 and GT3576 may end up with them though diesel app generally like larger exhaust housing AR's .

The way I see it the limitation of most production waste gates is trying to get the exhaust gas to turn 90 degrees and bugger off out through the hole in the side of the housing . The higher the gas speed is

the less it wants to know about doing the exit stage left . Corky Bell talks about the same sort of thing in the exhaust manifold section of his book Maximum Boost though thats to do with Ext gate placement on manifolds . If you can size your turbo right ideally the waste gate is only bleeding off enough exhaust gas to regulate the turbine /compressor speed to maintain a set boost pressure . If your engine breathes properly the boost pressure may not need to be super high and the exhaust manifold pressure should also be lower and the velocity also so the integral gate stands a much better chance of controlling it .

Cheers A .

Edited by discopotato03

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

    • GTSBoy
      Boost cut after swap(RB25DET NEO) R34

      By GTSBoy · Posted

      Don't even try to run it on the stock ECU if you're going to have the boost controller bring boost above ~10 psi. I've already told you that. If you use the Nistune ECU, you will need to CAREFULLY read the available documentation for Neo tuning, and read some threads on the Nistune forums, to discover the various things you have to do to prevent the ECU from going bananas when the boost is too high. The is a table associated with th boost sensor that must be modified to prevent it from shitting the bed. This is just one of the things that you will need to do to the tune in Nistune, because the Neo turbo ECU will be expecting to see a number of things (such as the TCS) that are not there, and you have to block the DTCs on those. It is totally not surprising to me that you are having the problems that you are, but the solutions to these problems have been known for >15 years. So just get it done.
    • dyl33
      VOLK RACING GTC CENTRE CAPS

      By dyl33 · Posted

      Centre caps $250
    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      Hi. Sry iam not a mechanic and iam not at the car atm so i dont know 100% but they told they measure those and even try to change those. AFM they have two. Coils are new a they have my old one too. Plugs too. ECU...we have 25 NEO stock and Nistune 25 NEO.   But i dont know if any one those could be the problem and why/if/what can cause this, Only thing they did not check is fuel...but that walbro 255 is new(like 1,5 years)... That fuel pressure gauge idk...but i let them know Any suggestions?   EDIT: how can they know if it is like you say he ECU pull power when it reaches a specific boost level that is too high? Tha car has boost controler
    • Duncan
      Boost cut after swap(RB25DET NEO) R34

      By Duncan · Posted

      Can you clarify what you mean by boost cut, do you mean it misfires both when under load (driving) and when stationary and out of gear? Or does the ECU pull power when it reaches a specific boost level that is too high (boost control issue)? Does it occur at idle with no throttle? When you say "the ECU is OK", what ECU is it and why do you think it is OK? Have you used the NEO ECU, and if so do you have a MAP sensor attached? Same for the AFM, why do you think it is OK? Do you have any way to put a fuel pressure gauge on it (even just a mechanical one between the fuel filter and fuel rail)?
    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      Hi.. Just another problem. So maybe you can help. I(my mechanic) done swap from my RB20DE NEO to RB25DET NEO. Everything is OK but we have a boost cut. Coils/Plugs are ok...AFM is ok. ECU is ok. I have Walbro 255 but it "changed" sound few months ago(you can hear it ouside) you did not hear that when it was new(maybe faulty?) Sooo...what now? What can cause this boost cut? It is even when you standing still...
×
×
  • Create New...