EFR7670 exhaust housing selection RB26

[LegendGTR]

I'm looking for some real world experiences/feed back from anyone who has personally ran a EFR7670 with a 1.05 exhaust housing or a .83

I'm leaning towards the .83 because its a street car used mostly for spirited driving in the canyons roads. I"m not looking for big numbers on paper. I want a responsive powerband that will be very linear to 8000 rpm. I dont mind if power remains somewhat flat but dont want power to drop off on top. The turbo I've purchased is a 1.05, although the mounting flange T3 vs T4 and internal vs external waste gates are different on both housings, I not concern about swapping parts or making fabrication mods to get what I want. Based on some of the research I've done with chat gpt, the 1.05 housing seems to be the way to go with slightly more lag and future proofing for more mods but recommends .83 for best response/street car setup. AI doesn't have the same emotions as real people driving a GTR so I think you guys will be able to give me better feed back 😀 

 

[LegendGTR]

The title should have posted "EFR7670 exhaust housing selection RB26"

I can seem to edit thr title on my Android.

[Duncan]

Title sorted

[r32-25t]

1.05 you’ve gotta let it breath 

[GTSBoy]

6 hours ago, LegendGTR said:

Based on some of the research I've done with chat gpt,

People have got to stop doing that. ShatGPT is not a search engine. It is a hallucination factory.

 

I also would recommend the 1.05. The .83 will "work" for you , in that it will be more responsive, but I think you'll find that it won't be anywhere near as good running it out to 8000rpm as the big housing will be.

[Dose Pipe Sutututu]

Before all the EFR fan boys come in, have a look at:

https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/g-series-ii-g30-825-58mm/

It also comes in a T4 1.06 divided housing.

I would dare say if you want response & also decent power, this thing would chop.

 

AND apologies, just re-read your post, you've already bought the turbo... whatever you do, make sure you stick with divided housing and proper twin scroll manifold.