PT6776RS vs. PT6776RH?

[dejacky]

Hi,
has anyone compared these two turbo's in terms of performance and spool characteristics? Does the PT6776RH spool noticeably slower than the PT6776RS if exhaust housing sizes are identical? The PT6776RH has a 3 inch outlet whereas the PT6776RS has a 2.5inch compressor outlet, so I'm curious to learn from you more experienced turbo gurus..

 

[SGRIM]

We have an H on the way. I have not heard of anybody comparing them. I will post how the H spools!

 

[1chance]

I have the 4inch 3inch, with 3000 L/U spool is instant!6776H

 

[ScorpionT]

Compressor housing doesnt really have an effect on spool, but it does effect compressor efficiency.

 

[dejacky]

Compressor housing doesnt really have an effect on spool, but it does effect compressor efficiency.

so does the H compressor housing make the pt6776r more efficient than the S compressor cover?

 

[Darkcyde]

Compressor housing doesnt really have an effect on spool, but it does effect compressor efficiency.

I disagree, but look i only have 200 posts so i am new haha

 

[ScorpionT]

so does the H compressor housing make the pt6776r more efficient than the S compressor cover?

The larger compressor housings (H over S) will be slightly more efficient because the air is heated less as it exits the turbo.