JusMX141
Moderator
- 15,152
- 1,268
- Dec 13, 2005
-
Greensburg,
Pennsylvania
Before Dave had even wrapped up the project of completely rebuilding his car two summers ago, I had already started planning what his next turbo might be. The old HX40 has absolutely surpassed our expectations of both performance and reliability....so what's the next step?
With such a large gap between the HX40 and HX52, something custom would need to be introduced. Wanting to stay T3 but concerned we may be at the end of what a 76/64mm HX40 turbine can do for us, a larger turbine would be mandatory to support any additional compressor flow. I explored getting certain T04S/T04Z Garrett compressors machined to work with the HX40 turbine, but many of these wheels are sporting a 88mm exducer which didn't seem large enough to make the custom machining worthwhile.
Not long after I had started researching upgrade possibilities, Austin at Turbo Lab had pointed out to me that Kawasaki Turbo System introduced a billet 66mm HX40 compressor designed to be the largest available to fit behind a machined HX40 cover to their catalog. Of course this was right up my alley, although it doesn't exhibit a larger exducer like I had hoped....and it doesn't resolve the need for a larger turbine wheel as well.
Just in time for the start of the 2014 season, here's the next turbo Dave will be running...slated to be the first Holset turbocharger into the 8-second category around the globe. The car has gone a best of 9.12 and 158.5 mph with a standard 60/86mm 6-blade HX40, so improving on that time once this turbo is dialed in should be a walk in the park.
The turbo uses a KTS 66mm HX40 compressor wheel mated to a new Genuine Holset 76/67mm H1E turbine. It's big. This turbine wheel has a 3mm-larger exducer and also a taller tip height than a standard HX40 turbine....so the increased tip height and larger exducer spec will hopefully handle the additional airflow that the 10% larger compressor inducer will draw in. A new Genuine Holset turbine shaft, new Genuine internals, and a machined Genuine HX35 center housing and compressor cover....the only aftermarket parts are the new Bullseye turbine housing and the KTS compressor wheel.
As much as BAE likes to call their knockoff H2D with a HX50 compressor wheel the "HX45", this turbo is closer to being a HX45 than any other considering it's still built using HX40/H1E parts...not to mention the Holset HX35 is it's own turbo and doesn't have too large of a compressor on too small of a turbine like BAE's "HX45".
I did the research, tracked down the parts, built the turbo, and ported the turbine housing inlet; all machining credit goes to TurboLab, and the exceptional powdercoating job on the compressor cover is from Detective Coating....so this unit is basically a collaboration of individuals who got their start within our platform. If you guys are looking to get machining and powdercoating work done, definitely use one of these Freelancers/Vendors and support those who support our platform!
Without further adieu....
With such a large gap between the HX40 and HX52, something custom would need to be introduced. Wanting to stay T3 but concerned we may be at the end of what a 76/64mm HX40 turbine can do for us, a larger turbine would be mandatory to support any additional compressor flow. I explored getting certain T04S/T04Z Garrett compressors machined to work with the HX40 turbine, but many of these wheels are sporting a 88mm exducer which didn't seem large enough to make the custom machining worthwhile.
Not long after I had started researching upgrade possibilities, Austin at Turbo Lab had pointed out to me that Kawasaki Turbo System introduced a billet 66mm HX40 compressor designed to be the largest available to fit behind a machined HX40 cover to their catalog. Of course this was right up my alley, although it doesn't exhibit a larger exducer like I had hoped....and it doesn't resolve the need for a larger turbine wheel as well.
Just in time for the start of the 2014 season, here's the next turbo Dave will be running...slated to be the first Holset turbocharger into the 8-second category around the globe. The car has gone a best of 9.12 and 158.5 mph with a standard 60/86mm 6-blade HX40, so improving on that time once this turbo is dialed in should be a walk in the park.
The turbo uses a KTS 66mm HX40 compressor wheel mated to a new Genuine Holset 76/67mm H1E turbine. It's big. This turbine wheel has a 3mm-larger exducer and also a taller tip height than a standard HX40 turbine....so the increased tip height and larger exducer spec will hopefully handle the additional airflow that the 10% larger compressor inducer will draw in. A new Genuine Holset turbine shaft, new Genuine internals, and a machined Genuine HX35 center housing and compressor cover....the only aftermarket parts are the new Bullseye turbine housing and the KTS compressor wheel.
As much as BAE likes to call their knockoff H2D with a HX50 compressor wheel the "HX45", this turbo is closer to being a HX45 than any other considering it's still built using HX40/H1E parts...not to mention the Holset HX35 is it's own turbo and doesn't have too large of a compressor on too small of a turbine like BAE's "HX45".
I did the research, tracked down the parts, built the turbo, and ported the turbine housing inlet; all machining credit goes to TurboLab, and the exceptional powdercoating job on the compressor cover is from Detective Coating....so this unit is basically a collaboration of individuals who got their start within our platform. If you guys are looking to get machining and powdercoating work done, definitely use one of these Freelancers/Vendors and support those who support our platform!
Without further adieu....
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