Originally posted by "Someone"
Originally posted by Boosted Z31
well duh
thats simple enough to know
but i am not worried about the wheels as any wheel can be machined to fit in any housing -- to a f;ng point ya know
but the housings are important b/c that is what allows them to be bolted on
***Not exactly. A 0.63 A/R and a 0.82 A/R T3 exhaust housing can both fit the same size wheels. The only difference is in the spiral portion of the housing....which is not where the wheel resides.
All we need to know about the housings is what family they are in..T25 T3 T4 etc...
Oh by the way you should not just hog out the housing and stuff a big ass wheel in there. For example I had my T28 rebuilt here in Tampa before I knew shit about turbos. I told the guy to upgrade it using his knowledge. So he found the largest possible wheel that would fit in the T28s T3 compressor housing. It was an S or V trim T04B wheel. The turbo turned out to be a piece of shit after it was done. The efficiency was way down from stock. This is because when you machine out the compressor housing too much for a larger wheel you cut into the diffuser of the housing. The diffuser is where most of the work is done in the compressor. When you decrease the area of the diffuser you lose several points worth of compressor efficiency.
Bottom line here is to spec or your own turbo using compressor maps and the pertinent info about your engine. So stay away from the junkyard man!
Later