boring out a compressor housing

[14spectre88]

This might seem a little ridiculous but I was wondering if anyone has ever tried to bore out their compressor housing to fit a bigger wheel inside. For instance, take an HX40 8 blade (54mm) and bore out the housing to fit a 6/7 blade (60mm). Could this be done?

 

[quayzar590awd]

If you have the correct bit to do it and a drill press that can clamp the piece down to keep the sub straight still while you bring the hole out. You may also need to get a finishing bit to hone your new bore to silky smoothness. Be aware that taking material of anything comes with its own set of risks anytime you remove metal you are literally taking out the structure and strength of the piece. The most important thing is to not over do it. Ask JUSTMX141 how far away the wheel needs to be from the housing. I have no idea what the spec is. He is the resident expert on turbo over hauls and can provide you with much more info on that subject. He could probably do it for you and put the turbo back together as well for a small fee.

 

[donniekak]

The compressor is not drilled out. It is machined and has to have the contour changed for a different compressor. The local turbo shop where i live charges about $65 to machine a compressor or turbine housing.

 

[quayzar590awd]

Well gladly no one mentioned anything about drilling anything. A drill press or variant of is what the machine shops use for line honing decking, boring and numerous other tasks and have done since the 1800's when Samuel colt invented the technology and the American way of manufacturing.

 

[14spectre88]

Hey, thanks for the info guys. So we're talking about something you can't do yourself (unless you have a machine shop at your disposal), you definitely have to get it machined. Do you know the maximum bore you can achieve? Do you think 6mm would be too much?

 

[donniekak]

If the new compressor is big enough the turbo inlet is sleeved with a larger inlet. People put 16g, and 19t compressors into tdo4 9b compressor housings this way.

 

[LiquidX]

If you are going to port or drill anything only do the inlet hole before the wheel. The compressor housing is machined with strict tolerances to wheel size and it's not something you should touch with out the proper tools and skill/knowladge of what you are affecting. If you want to open up the compressor housing for a larger wheel either send it out to get machined or buy a larger one for the correct wheel size.

 

[14spectre88]

If you are going to port or drill anything only do the inlet hole before the wheel. The compressor housing is machined with strict tolerances to wheel size and it's not something you should touch with out the proper tools and skill/knowladge of what you are affecting. If you want to open up the compressor housing for a larger wheel either send it out to get machined or buy a larger one for the correct wheel size.

that's what I figured seeing all the pics of wheels inside housings and noticing the precision of the fit. At least I know you can send it out to be done...Thanks!

 

[LiquidX]

Check with forced performance to see what kind of service they can offer.

 

[quayzar590awd]

hey this is slightly off topic but I was considering having my cold and hot sides housing ceramic coated then having the outside jet hot coated. I wanted to know if anyone has tried this, I have not really seen anything on the subject. I know the ceramic coating will make the air create less friction and the jet hot coating reduces heat. The service will only cost me around 80 or 100 dollars. Sorry if it sounds stupid but I regret going with a big 16 g due to its increased spool time VS output over the small 16 g. I have wondered if I could coat the both sides with a ceramic to make it create less friction then jet hot to make it work cooler overall to maybe boost the turbos overall performance and make it spool a wee little bit faster.

 

[Afroclipse]

This might seem a little ridiculous but I was wondering if anyone has ever tried to bore out their compressor housing to fit a bigger wheel inside. For instance, take an HX40 8 blade (54mm) and bore out the housing to fit a 6/7 blade (60mm). Could this be done?

Turbo rebuild shop usually have machines that do just that, I had my 14b machined to fit a 18g wheel, comp housing and CHRA.

 

[knochgoon24]

This is what you can do if you bore out the compressor/turbine housing.

From: http://www.dsmtuners.com/forums/turbo-system-tech/342222-anyone-heard-20g.html

The Texas 16g.

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Imagine popping the hood to reveal what appears to be a stock TD05H turbo.

old school 7-blade GT30R compressor
TD06H turbine

 

[quayzar590awd]

sweet, That is a good looking turbo very very sleeper , What kind of numbers will that baby put down?