GBC22-350 instead of -7s? RB26

[Beelzebub89]

Been getting ready to finish my car which has been sitting around for ages. It was originally a -7 bolt on kind of deal with a built 2.6 in it. Just going to be used for fun weekend driving and looking purty.

Ive been reading a bit on the newer turbo ranges that have come out but most of them are targeted at big power these days and the bolt on upgrade stuff is all gtx2860 cores on old turbine housings which don't seem to work that well. 

I came across the gbc22-350 mentioned in a thread on here but can't find much other info of any installed on an RB. Lots of them on miatas and smaller displacement stuff where people seem to be happy with them.

 

From a compressor map point of view they look very similar to the -7 but don't fall over as much at higher boost pressures.

 

https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/garrett-boost-club-line-gbc22-350/

 

https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/gt2860r/

 

Looks like it would need some new intake piping to fit on the 26 and plug up the water cooling pipes etc.

 

Thoughts on this instead of -7s? Would be running a flex tune so potentially could push these harder on e85 than the -7s

[Murray_Calavera]

What are your thoughts on going to a single turbo setup? You don't need to bolt on a huge turbo and you'll open up a lot more options this way. 

[Piggaz]

The GT series link you provided is for the larger -5’s.

https://www.turbomaster.info/eng/applications/707160-0009.php

link for -7’s.

[morboost]

what ever you do dont go single, fitting a single to a 100k gtr in this current time is regarded. 

what you should be doing is fitting hks and nismo parts, your only real option in hks2530. click buy now install tune to 550 weekend horsepower, it lags when it lags who cares.

[Beelzebub89]

Yeah wasn't really about going single. Ive read plenty on it but it's not something I want for my car.

Was more looking to see if anyone here had seen results with these new smaller turbos. Lots of new compressor and turbine tech in the last few years but not a lot of that finding its way into smaller aftermarket turbo's that I've seen.

Even less being experimented with other than varying sizes of singles and people messing around with the GTX compressors on old exhaust housings.

Just looking at wheel sizes and compressor maps these look very close to -7s but still working at high pressure ratios.

 

[joshuaho96]

On 4/28/2023 at 10:51 AM, Beelzebub89 said:

Been getting ready to finish my car which has been sitting around for ages. It was originally a -7 bolt on kind of deal with a built 2.6 in it. Just going to be used for fun weekend driving and looking purty.

Ive been reading a bit on the newer turbo ranges that have come out but most of them are targeted at big power these days and the bolt on upgrade stuff is all gtx2860 cores on old turbine housings which don't seem to work that well. 

I came across the gbc22-350 mentioned in a thread on here but can't find much other info of any installed on an RB. Lots of them on miatas and smaller displacement stuff where people seem to be happy with them.

 

From a compressor map point of view they look very similar to the -7 but don't fall over as much at higher boost pressures.

 

https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/garrett-boost-club-line-gbc22-350/

 

https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/gt2860r/

 

Looks like it would need some new intake piping to fit on the 26 and plug up the water cooling pipes etc.

 

Thoughts on this instead of -7s? Would be running a flex tune so potentially could push these harder on e85 than the -7s

They are not direct bolt-on like -7s. Compare the two bolt pattern diagrams and just by shape alone they aren’t the same. I would not run a purely oil cooled turbo either, the CHRA is going to run hotter and put more heat into the oil which is already challenged in the RBs.

If you’re going to change manifolds and all this other stuff to make turbos work why not just run a single EFR7163 with twin scroll? If you just want higher efficiency at high boost vs -7s you’ve basically described -9s.