Phat shaft 62/ht3b

[TReed]

I could be wrong but I think the BHT3B is made by garrett and HT3B is made by Holset

 

[JGK]

Just wondering what the difference is between a HT3B and a BHT3B?

The "B" prefix refers to the compressor housing. I can't remember exactly what it stands for, but it refers to a slot or port cut around the intake tract leading to the compressor wheel. Forgive me, but its been about 6 months since this was explained to me (by HTT) and about 4 months since I looked at mine. This port or slot widens the useable range of the turbo, but sacrifices a little bit of efficiency, as I remember.



I don't think its a manufacturer-related issue. All the builders of the HT3B-type turbos may provide this option.