Does anyone here have a T04b with a #8 hotside? How is this combo? I had my internals upgraded to a 57 trim stage 3 wheel and now I feel like the #6 hot side is choking the air flow. What's your thoughts?

I have to now pull my turbo for the third time. Play in the shaft again.

 

i got the 8 in an e had an 8 in a b also worthy upgrade

 

How was the lag with the b? Was yours a ball bearing?

 

no ball bearing, not much lag with a b 1st gear was useless that was with a manual boost controller 2nd gear was slippery as well

 

Do you have any idea how much power you were putting down with the b? What boost level were you running it at? Just trying to compare to see if I'm in the right ball park.

 

It has been said in here that once you get a real big compressor, the #6 is too small and actually ADDS to the lag due to all the backpressure.

 

I wonder if that added backpressure caused the shaft play that I now have. This would also explain the excessive heat I was getting from the hotside. My manifold and fuel rail were too hot to touch.

 

18lbs of boost, about 300 ish at the wheels my injectors were holding me back a bit if you're going hybrid dump the 6 side get an 8 much better

 

B vs E housing has nothing to do with lag, lag is the hotside.

The E housing is more efficient than the B housing because it has a larger scroll to it which allows
better efficiency meaning lower air temp coming out of the cover.

 

hosrom, that's not correct.. You can CNC a "B" wheel in the so called E compressor housing.. You efficiency of the compressor side of the turbo would be lower, not because of the housing but because of the low efficiency comp wheel. Larger scroll=larger A/R.. The TO4E compressor wheels are typically 4-6% more efficient than the TO4B.. The "E" wheels have a larger major and many times the aero tip is changed.. thus the need for a re-designed housing with more meat for the larger major.. You can change A/R's of any compressor housing... You can take a larger A/R scroll of a TO4B or TO4E housing and be less restrictive, but your velocity suffers. You can also port an existing housing and hog out some aluminum and change the A/R at the throat of the scroll..

 

Kevin, that is what Turbonetics, Precision and Innovative informed me with regards to the E and B housing for the 60-1HiFi with regards to efficiency.


I never brought up the subject of compressor wheels and housings, i was referring to the T04B housing compared with the T04E housing with respect to efficiency.

 

Does everyone agree that a B with 57 trim would be more suited for a #8 housing compared to a #6 housing? Do you think I was causing too much back pressure?

 

Kevin, if that is a street car and you plan on no modifications and want quick spool, then it is the #6

If you plan on future mods (p&p for example) and have a plan for track/DE's, you may sacrifice some lag but it would give you more top end power to use.....

Unless you get a BB #8 hotside

 

One thing that you folks can do with your #6 housing is enlarge the port and modify the A/R.. If you remove material at the throat of the housing or the end of the snail you will free up the turbine housing and remove backpressure.. Basically turning your housing into a 6.5 or .7 A/R.. One can custom port his turbine housing for his driving or racing needs..

 

We run a T04B with a #8 hothouse - it feels very laggy (power comes on after 4,500 rpm), but I will defer judgement until we have checked the blow-off valve (it sounds like it is open all the time), and have been to the dyno again. Will not quote any numbers now . they were disappointing (on a fresh and carefully run-in engine).