this is exciting, i just got a funky new borgwarner airwerks turbo sent in we want to try out, 2009 is going to be a very interesting year for twinscroll turbos!

 

nice cant wait to see some testing. Im starting to like borg warner turbos alot more now!

 

There isnt anything inherent to the HTA wheel aero that makes it unsuitable for use with a twin scroll turbine housing. In fact a very large number of the HTA wheels in service are in front of divided EVO9 turbine housings.

If a twin scroll header makes a big turbo come on fast, then it makes a smaller turbo with the improved efficency of the THA wheel areo come on even faster, no black magic there! So if you feel that the different cylinder pulse timing from a divided housing is helpful in your application (and it is in MANY applications) then go that route by all means, but don't feel that using a HTA wheel aero is a conflict for some reason. Furthermore I stongly disagree with comments made earlier in this thread that HTA wheel areo is somehow not compatible with DHPT or divided housing pulse timing.

The main problem in supplying FP HTA turbos with divided or "twin scroll" housings is that garreett doesnt have any great or even good divided T3 flanged housings for the 35R CHRA. The only good work around that I know of is the one being used by Ted B, run the T4 divided housings instead.

 

Good luck with the new setup Teddie B!

Glad to hear you are liking it.. I bet it is awesome.