The stock turbo is not efficient after 11 to 12 pounds it will run hot and cause the turbo to blow its seals, the Turbo would need to be modified to run efficiently at higher than 12psi

Rotary > Pistons

 

No, that's not why the turbo shouldn't really be run past about 12 PSI. It has nothing to due with blowing turbo seals, but everything to do with the fact the compressor out of it's efficiency island trying to supply that much air, and it ends up just heating the intake charge. Certainly not good for the turbo seals to overspin it, however that's not the primary concern.

IATs on the stock IC between 10 PSI and 14 PSI are MUCH higher.

Though the aftermarket hybrids have better thrust bearings and typically better seals to cope with the higher boost. But they also run lower shaft speeds due to the larger compressors...

 

I was planning on running 10 psi , I'm putting some reflective tape on my tmic to help with lowering iats.

Rotary > Pistons

 

I think you missed Van Halen's point.

 

My exhaust is mostly 2.5" only the mid section is 3" so I hope it will be easier to keep it around 10psi

Rotary > Pistons

 

Reflective tape will do little to help IATs, as the primary source of temperature in the intake air is the turbocharger compressor. Really, the choices are:

1. Keep the boost in the efficiency range of the turbo
2. Upgrade the intercooler
3. Use some kind of aux injection to chemically cool the charge

 

What do you consider the efficiency range of the stock Turbo?

I'm doing what I can to run cooler, as I can't afford AI or upgrading my ic

Rotary > Pistons

 

Around 10 - 12 PSI, depending on the engine.

Typically after 10 PSI on a 13B IATs start to increase significantly.

This is all pretty well documented.

 

I was going to run around 10 psi, my engine is.rebuilt with stock ports.

I know pretty much everything is documented but alot of the information is conflicting.

I do appreciate you answering my questions, thank you.

Rotary > Pistons

 

I appreciate all the responses. I was really hoping to come across a plug/play turbo kit that would let me retain the stock intercooler or even just build a larger intercooler that would stay in the stock location. My main goal is to get this car setup for some hard driving and track days. I plan to tune the car for low boost, about 10psi. I think that would be enough to keep the car fun and the throttle down for most of the track.

I want to keep the front of the car open for a large radiator and 2 stock oil coolers running in parallel. I will sheet metal ducting designed to channel the air as efficiently as possible.

It's too bad the HKS sport upgrade isn't available anymore. The BNR seems like the best option at this point. I don't clearly understand the advantages of the Stage 2 vs the Stage 1. But I know that's about my boost/power level.

If intake air temps become a huge problem, I'll add water injection to help remedy it.

 

stage 1 is a stock compressor housing with a bigger compressor wheel, stage 2 has a t04b compressor housing.

only running ~10psi you shouldn't need to change the turbo at all