Compressor housing a/r. Any point to different sizes at all?
24-08-2008 | 10:06 PM
#1
Thread Starter
DEYTUKURJERBS
Joined: Apr 2004
Posts: 29,378
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From: North Korea
Compressor housing a/r. Any point to different sizes at all?
As title, I love turbos and know a lot about em, but ive never seen owt about it, and is certainly never an option n turbos like turbine a/r is, so whatever difference it makes must be rather small.
Reason I thought of this now is I have a Garrett turbo which ive identified by its wheel sizes, but the compressor housing itself is MASSIVLEY bigger than the listed one, even though the wheels are identical, inducer and exducer.
a/r is listed at .60 and looks pretty ordinary for the compressor wheel size, but this one is .86 and is about twice the fucking size as youd expect for the wheel it houses.
Why would that have been done? Its not a hybrid turbo, its of a standard engine.
Reason I thought of this now is I have a Garrett turbo which ive identified by its wheel sizes, but the compressor housing itself is MASSIVLEY bigger than the listed one, even though the wheels are identical, inducer and exducer.
a/r is listed at .60 and looks pretty ordinary for the compressor wheel size, but this one is .86 and is about twice the fucking size as youd expect for the wheel it houses.
Why would that have been done? Its not a hybrid turbo, its of a standard engine.
24-08-2008 | 11:28 PM
#4
Norris Motorsport
Joined: May 2003
Posts: 3,437
Likes: 3
From: Derbyshire
Stavros,
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
24-08-2008 | 11:30 PM
#5
PassionFord Post Whore!!
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Joined: May 2004
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From: Bangor, Northern Ireland
Stavros,
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
How about thick fucker terms?
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24-08-2008 | 11:48 PM
#9
Ban[B][/B]ned
Joined: Jul 2005
Posts: 34,090
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From: The Pool.
Stavros,
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
25-08-2008 | 12:12 AM
#10
Thread Starter
DEYTUKURJERBS
Joined: Apr 2004
Posts: 29,378
Likes: 1
From: North Korea
Stavros,
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
In laymans terms, when wanting to run a high boost pressure for a given compressor wheel, it is best to run a larger A/R compressor housing. For low boosting applications it is better to use a smaller A/R ratio. This is because the compressor housing can be considered in the same way a plenum is to the engine, and the larger compressor housing gives a larger volute volume immediately at the exducer exit, which helps the compressor to process a greater air flow at the higher boost pressure required.
From what I can tell, the turbo the wheel tallys up to fits in a housing the same as the others in the range, but the compressor map shows another bar or so of boost compared to the others in the range.
So seems like the large housing suits it more than the "normal" housing this compressor comes with, making what Karl said make sense
The turbne a/r is also very different, smaller a/r but bigger inlet/outlet, so thats less conclusive.
Still odd though, never seen one like this. My immediate thought was maybe its the 2nd or 3rd turbo in a compound charged engine, which tally up with the big boost etc etc. I dunno, odd really.
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