Best Turbo for early Spool RB28

[Dr Evil]

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.

[Dr Evil]

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?

[CefiroA31]

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.

[TurboTapin]

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. 

 

[Kinkstaah]

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.

 

[Predator1]

EFR9180 hands down.. You're welcome.

[SiR_RB]

6466

[hattori hanzo]

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 

[Dr Evil]

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?

[Piggaz]

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.

[hattori hanzo]

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

 

[StubbyFoil]

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.