I have up for sale my Holset HX40. I bought it for $650 rebuilt with 100 miles on it since the rebuild, the previous owner decided to upgrade to a bigger turbo. The Holset turbos are known to be very reliable and resilient, many e30, and dsmers use them to great success. The HX40 has a very wide efficiency range with better high flow efficiency than a GT35R and similar spool, dsmers have proven them to 650-700whp on 0.63 T3 housings! It is of course a journal bearing turbo, but is rebuildable yourself for VERY cheap($50).
Here are the specs per my measurements with the outside vernier calipers I have:
Compressor is a 8-blade:
Inducer: 2.2746"=57.77484mm
Exducer: 3.2183"=81.74482mm
Turbine is a 12-blade:
Inducer: 2.4831"=63.0704mm
Exducer: 2.9653"=75.3186mm
The above are the EXACT measurements, this is what is commonly referred to as the 58mm 8-blade compressor wheel with 64mm 12-blade turbine wheel that is common.
I had two Precision turbine housings machined to fit the Holset HX40 by Austin Cole of TurboLab.
1) Precision T4 0.84 A/R Divided.
2) Precision T4 0.58 A/R Open, the inside had to be machined out a little extra so it most likely closer to a .63-73 in actual A/R.
For reference, here is a table of cm2 to A/R conversion:
6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R
14 cm2 = 1.05 A/R
16 cm2 = 1.21 A/R
18 cm2 = 1.37 A/R
21 cm2 = 1.61 A/R
Here are pictures of the turbo:
I had previously been using a T4 17cm2 divided housing which as you can see is equivalent to around a 1.30 A/R.
With my s52 I was seeing 9psi by 3800RPM with the 17cm, with boost coming on around 3000RPM in 3rd gear. Here is a video of a quick pull @9psi. http://www.youtube.com/watch?v=nH3RqDQKfHI
You can imagine what spool would be like with one of the smaller Precision housings.
How it fitted with my OBX top mount in my e36:
Pictures of the cartridge, in the interest of full disclosure the little bit of oil around the turbine wheel MAY necessitate a new rear seal. I had an issue with crankcase pressure/a kink in my oil drain that I believe was pushing oil past the turbine-side seal. It is POSSIBLE it needs a new rear seal, but from talking to many Holset guys the rear seal is basically a metal washer and is very resilient, so on a proper oil drain there should no longer be an issue. At WORST a $50 dollar rebuild kit would be necessary to replace the seal.
I'm asking $700 OBO plus shipping for the HX40 with one of the precision housings of your choice.
Here are the specs per my measurements with the outside vernier calipers I have:
Compressor is a 8-blade:
Inducer: 2.2746"=57.77484mm
Exducer: 3.2183"=81.74482mm
Turbine is a 12-blade:
Inducer: 2.4831"=63.0704mm
Exducer: 2.9653"=75.3186mm
The above are the EXACT measurements, this is what is commonly referred to as the 58mm 8-blade compressor wheel with 64mm 12-blade turbine wheel that is common.
I had two Precision turbine housings machined to fit the Holset HX40 by Austin Cole of TurboLab.
1) Precision T4 0.84 A/R Divided.
2) Precision T4 0.58 A/R Open, the inside had to be machined out a little extra so it most likely closer to a .63-73 in actual A/R.
For reference, here is a table of cm2 to A/R conversion:
6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R
14 cm2 = 1.05 A/R
16 cm2 = 1.21 A/R
18 cm2 = 1.37 A/R
21 cm2 = 1.61 A/R
Here are pictures of the turbo:
I had previously been using a T4 17cm2 divided housing which as you can see is equivalent to around a 1.30 A/R.
With my s52 I was seeing 9psi by 3800RPM with the 17cm, with boost coming on around 3000RPM in 3rd gear. Here is a video of a quick pull @9psi. http://www.youtube.com/watch?v=nH3RqDQKfHI
You can imagine what spool would be like with one of the smaller Precision housings.
How it fitted with my OBX top mount in my e36:
Pictures of the cartridge, in the interest of full disclosure the little bit of oil around the turbine wheel MAY necessitate a new rear seal. I had an issue with crankcase pressure/a kink in my oil drain that I believe was pushing oil past the turbine-side seal. It is POSSIBLE it needs a new rear seal, but from talking to many Holset guys the rear seal is basically a metal washer and is very resilient, so on a proper oil drain there should no longer be an issue. At WORST a $50 dollar rebuild kit would be necessary to replace the seal.
I'm asking $700 OBO plus shipping for the HX40 with one of the precision housings of your choice.
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