Jump to content
SAU Community

Recommended Posts

Hi Guys,

 

I am building a Nitto Stroked RB28 with all the goodies, fully Ported/Polished Head, Kelford 182-SE Cams, VR38 Coil conversion, PRP 32T Trigger kit (or similar) etc. Looking at using either the 6Boost T4 Divided Manifold or Hypertune T4 divided. Which Turbo will give me the quickest spool from around 3500rpm to 8500rpm without running out of puff? Looking for around 750 - 900hp.

Thank you for your input.

Link to comment
https://www.sau.com.au/forums/topic/484757-best-turbo-for-early-spool-rb28/
Share on other sites

Hi, Forgot to mention that the car will run mostly on RON98 But will be E85 capable. I have been told either Precision 6870 A/R 1.00 with Artec 70mm Big Daddy "V" Band Manifold or Garrett G35-1050 A/R 1.05 using T4 Twin Scroll. Both of these sound great But as this will only be a street car, Which Turbo set up will give the best Response or should I stick with Twin EFR'S?

If wanting quickest spool/response then its twin scroll efr set up. For >750hp, efr8474 or larger. If not efrs, g35-900 or g40-1150, if wanting cheaper, gtw3884r-67mm or gbc37-900, all shoud be in twin scroll set up for better spool/response. Skip g35-1050 at it has mismatched wheels, compressor too large for turbine.

I run a gen2 6466 1.00ar divided T4 on my 2.8 and it spools wickedly fast. If you're aiming for 750-800whp, I think it's a great choice. If you're looking at 900whp+ I'd go 6870. 

 

If wanting quickest spool/response then its twin scroll efr set up. For >750hp, efr8474 or larger. If not efrs, g35-900 or g40-1150, if wanting cheaper, gtw3884r-67mm or gbc37-900, all shoud be in twin scroll set up for better spool/response. Skip g35-1050 at it has mismatched wheels, compressor too large for turbine.



Road car, Borg Warner is the only answer. Anyone who thinks anything responds great has not felt the transient differences that That Ti-Al wheel provides. The turbo is the single most important part of anything. The right turbo will have much more effect than going from 2.6 to 2.8L.

 

  • Like 1

hey mate 

 

check my build thread i have pushed the 6466 as far as i can go on a HKS 2.8 with Rams head and 276 cams

got 820whp and all in just after 4k 

good for a 9.6@146 

copped years of proper motorsport use 

I am going to swap over to a g35900 now just for shits and giggles to be honest and see how it all compares 

but i do recommend a 6466 on a 2.8 as a really good allrounder turbo 

  • Like 2
24 minutes ago, Dr Evil said:

Hi Hattori, The G35-900 was also one of the favorites, please let me know how you get on :) I need to order something in the next few weeks. Also, What Manifold? Hypertune T4 or 6Boost T4 or Artec V band?

Wouldn't the manifold you buy be dictated by the turbo and rear housing you choose? 

You're chasing 'early spool' so it would make sense to choose a T4 TS manifold for a T4 TS turbine housing.

2 hours ago, Dr Evil said:

Hi Hattori, The G35-900 was also one of the favorites, please let me know how you get on :) I need to order something in the next few weeks. Also, What Manifold? Hypertune T4 or 6Boost T4 or Artec V band?

I went 6boost t4 twin scroll

 

1.15 rear housing I gained alot and lost minimal response 

 

2013 my options were 6boost or a bespoke manifold so that's why I went 6boost. 

Ild try Artech if I went again

 

  • 2 weeks later...

I am currently building a Nitto 2.8, GSC S1 Billet cams, Headgames pocket port/shimless bucket head in an R33 GTR. Shooting to make a reasonably responsive 850whp for a street car when in "kill mode". I wanted to go the EFR 8474 Black series, but they are no longer making certain EFR's until further notice. I ended up getting an awesome deal on a Divided T4, 1.0 AR turbine Precision 6870 with the T51r mod for $2100 brand new. This turbo is very similar in size to the EFR 8474, but obviously uses different materials. I think spool should be around the same (all in around 4,500rpm) and I will be revving to about 8,500. Also using a PPG sequential, so once its spooled, it should stay there, which is why I may consider going larger turbo later. This will all be sitting on a Full-Race divided T4 twin 44mm wastegate manifold. My theory is that I will try the "smaller" Precision 6870 before jumping up to a 9180 or even 9280 EFR that are actually available. My engine is almost finished being built, so the car should be running in the next 4-6 months from now, although it wont likely be tuned on E85/full boost for a few months after initial startup. I will stay tuned and update once I have results. 

  • Like 2

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


  • Similar Content

  • Latest Posts

    • Hi, is the HKS  Tower Bar still available ? negotiable ? 🤔
    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
    • Onto the android unit. You need to remove the top screen because there is a daughterboard to put inside the case. Each side vent pops out from clips; start at the bottom and carefully remove upwards (use a trim remover tool to avoid breaking anything). Then the lower screen and controls come out, 4 screws, a couple of clips (including 3 flimsy ones at the top) and 3 plugs on the rear. Then the upper screen, 4 screws and a bunch of plugs and she is out. From there, remove the mounting brackets (2 screws each), 4 screws on the rear, 2 screws top and bottom and 3 screws holding in the small plates on each side. When you remove the back cover (tight fit), watch out for the power cable for the fan, I removed it so I could put the back aside. The mainboard is held in by 1 screw in the middle, 1 aerial at the top and 3 ribbon cables. If you've ever done any laptop stuff the ribbon cables are OK to work with, just pop up the retainer and they slide out. If you are not familiar just grab a 12 year old from an iphone factory, they will know how it works The case should now look like this:
    • Switching the console was tricky. First there were 6 screws to remove, and also the little adapter loom and its screws had to come out. Also don't forget to remove the 2 screws holding the central locking receiver. Then there are 4 clips on either side....these were very tight in this case and needed careful persuading with a long flat screw driver....some force required but not enough to break them...this was probably the fiddliest part of the whole job. In my case I needed both the wiring loom and the central locking receiver module to swap across to the new one. That was it for the console, so "assembly is the reverse of disassembly"
×
×
  • Create New...