auxilary Posted April 11, 2003 Share Posted April 11, 2003 Can someone explain AR numbers to me? I'm getting into the turbo world, I know how the turbo works, but I need more info to learn what turbo I'll need to mate to my wankel (rotary, that is, get your minds out of the gutter). I'm swapping a 13b turbo into my Z, and the stock turbo's not going to cut my needs. I just need a brief (or detailed, i favor detailed!) rundown of different trims, turbo sizes, how to calculate what's needed, and what a/r numbers represent thanks! (can't be ignorant if I ask, right?) Quote Link to comment Share on other sites More sharing options...
DavyZ Posted April 11, 2003 Share Posted April 11, 2003 ... I'll need to mate to my wankel (rotary, that is, get your minds out of the gutter). ... That would be "winkle" Davy Borrow my Maximum Boost or Turbochargers for a textbook answer... Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 11, 2003 Share Posted April 11, 2003 ... I'll need to mate to my wankel (rotary' date=' that is, get your minds out of the gutter). ...[/quote'] That would be "winkle" Davy Or maybe wrinkle Tim Quote Link to comment Share on other sites More sharing options...
auxilary Posted April 11, 2003 Author Share Posted April 11, 2003 maybe you guys should actually focus on the info request at hand, instead of making immature jokes? (holy shit, did I, of all people, just say that?) Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 11, 2003 Share Posted April 11, 2003 maybe you guys should actually focus on the info request at hand, instead of making immature jokes? (holy dodo, did I, of all people, just say that?) Sorry Tim Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted April 11, 2003 Share Posted April 11, 2003 Aux - that's a pretty tall information order. A/R is the area/radius ratio of a turbine or compressor housing. In such a housing, the area/radius around the snail is a constant. Radius being the distance from the center of the housing to the center of the passage, and area is the area of the passage at the point you measure the radius. The higher the number, the greater the flow potential for that particular series of turbocharger. For a turbine, the A/R is directly related to the spoolup time, or response of the turbo. I don't know anything about turbos on rotaries, but what I see people using are larger A/R turbines. As far as compressors, you need to determine your power needs and calculate the flow and boost pressure necessary to support that. Based on that and what type of driving you will do, you can then choose your turbo, both turbine and compressor. Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted April 11, 2003 Share Posted April 11, 2003 Full T4 stuff on a rotary (two rotor) will usually require a P-trim with a .96 a/r housing. A good compressor matchup is a 60-1 or 62-1. This setup spools well on a rotary. Rotaries DO NOT like back pressure. Quote Link to comment Share on other sites More sharing options...
auxilary Posted April 11, 2003 Author Share Posted April 11, 2003 ok, so what's the different between the p-trim, s-trim, and whatever else is available? Is there a site with all explanations listed as a legend, or should I just pick your guys' brains? Quote Link to comment Share on other sites More sharing options...
zlalomz Posted April 11, 2003 Share Posted April 11, 2003 Bryan Feldman of Datsun 510 fame in Georgia has quite a bit of 13B turbo rotary experience. His website is down right now but perhaps someone has his E-mail address. Go to http://www.bryanf.com/ to see a picture of his radical rotary ride. P.S. it was good to meet you at the Rio Vista event. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted April 12, 2003 Share Posted April 12, 2003 An S trim is a compressor wheel, and a P trim is a turbine wheel, just for starters. Make sure you don't confuse the two. The advice on the turbo from Tim is good. Rotaries typically run a larger AR turbine housing then a piston engine. They have three power pulses per revolution if that helps you understand why. Just so you know, N, O, P and Q trim are all turbine wheels. S and V are compressor. Also Stage III, IV, and V are turbine wheels. You could probably have the stock turbo upgraded by sending it to one of the better shops, like Forced Performance. I am not sure if they do those or not. Alex on here also can build a turbo, but I don't know if he messes with those. He rebuilt one for me and did a nice job, so I would use him again. Quote Link to comment Share on other sites More sharing options...
auxilary Posted April 12, 2003 Author Share Posted April 12, 2003 Bryan Feldman of Datsun 510 fame in Georgia has quite a bit of 13B turbo rotary experience. His website is down right now but perhaps someone has his E-mail address. Go to http://www.bryanf.com/[/url'] to see a picture of his radical rotary ride. P.S. it was good to meet you at the Rio Vista event. Yeah, I've seen Bryan's 510 info before, I just wish his site was back up should've saved it locally Yeah, definitely a great turnout at Rio Vista, thanks again for the tank and the bumper! Quote Link to comment Share on other sites More sharing options...
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