Turbo housing

[GWInquisitor14]

I'm searching around for a turbo to buy, I'm gonna custom build my kit. I'm looking something around a T3/4 Turbonetics. i know that is a small turbo that will be safe for my vtec prelude. What i dont understand is all these trims and houseing. I'm confused about stuff like .60 A/R compressor housing and .53 A/R turbine housing....yadda yadda yadda. If someone could just give me the low down on what all the numbers mean so that i could know what I'm looking for as a comsumer. THis is just what I have to my knowledge, correct me if im wrong but it starts out w/ T3 and then as the numbers go up, the turbo gets bigger so like a T60 is the biggest. See then I'd consider a T25 or so turbo and put in low compression pistons. I wanna build up my motor as one spring so i can race this summer in a league. Also maybe you could give me your opinion on what turbo would be best for the application. It is all stock except 2.5" custom exhaust cat back. Thanks

[turbo2nr]

ok here we go..
the a/r is hte size of the turbine housing, thats where the exhaust gasses flow from the exhaust mainfold, now the bigger the a/r the more air will flow into the turbine wheel, for example a .53 ar is really small and wont flow alot of air but it will move the turbine qucikly and allow for qucik spool up but little top end, a .63 a/r will spool slower but give you more topend, the bigger the a/r is the slower it will spool but the more hp can be made, you should also see how much cfm the turbo flows, if you want to make 400hp look for a turbo that flows about 400lb/min but that will work on a built motor not a tock one, i say a t-25 or a 14b from a 1st gen gsx/tsi will be good they make up to 350hp..
btw 3' exhaust is great for turbo, try to get form the turbo back to see maximum hp..
good luck
1

[TEAM KLR]

what is your target horse power? now and in say 6-12months?
i prefer a higher comp like 9.5 with alittle less boost for a street car and for a race car only use like a 8.5 with more boost.
a very popular turbo now that works well for 300-just over 400hp applications is the tnetics 60-1

[GWInquisitor14]

thanx for the replys, but isn't that 60-1 turbo a larger turbo. I was thinkin of going w/ a 3" downpipe but not sure yet cuz i do kinda wanna keep the air conditioning. If i go w/ that will that spool the turbo a lot easier? My guess is yes. Ive looked around for 8.5 comp pistons but I cant find any. The lowest i found is 9.0. I want this to be a daily driver. My plan is that i'll just run lower boost daily. I want to get a Hondata S200, to control everything, but from what I'm getting out of their website, you cant control the boost easily. I wanna get a boost controller, probably APEXi, is this a wise decision. I know a kid who has a supra, he has a manual boost controller that he just bumps up the PSI when he goes to race. that what i wanna do. So basicly my question is, will this work.....getting an APEXi boost controller work w/ the hondata