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10-21-2005, 05:30 PM
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#1 |
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Go fast, Go Cheap
Join Date: May 2005
Location: Selinsgrove, PA
Age: 23
Posts: 1,299
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Ride: Hybrid POWER!
Rep Power: 24
   
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Can someone explain or point to a site that shows what the signifigance of trim and a/r are i really don't know
__________________
Resurrected Sol http://hondaswap.com/auto-multi-medi...ted-sol-60210/ 2003 Civic Hybrid (I'm a grown-up now) www.myspace.com/burdenelectronica |
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10-21-2005, 06:58 PM
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#2 | |
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HS Troll...And Mod
Join Date: Apr 2005
Location: Dallas, TX
Age: 23
Posts: 10,304
iTrader: 0 / 0%
Ride: 2001 Honda S2000
Rep Power: 179
  
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Hotrod.com has a really good article that touches on it.
http://www.hotrod.com/techarticles/engine/...rbo/index1.html oh, and that is page 2, there is more to that article than just that. __________________
If you PM me with tech questions, you better have a link to the thread in your PM. Quote:
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10-21-2005, 07:05 PM
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#3 |
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Senior Member
Join Date: Jul 2003
Location: buck teeth and government checks, PA
Posts: 3,782
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Rep Power: 50
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http://www.midwesthybrid.com |
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10-23-2005, 07:05 AM
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#4 |
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Member
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For compressor wheels, trim is the ratio of inducer diameter vs exducer diameter. The inducer is the part of the wheel where the air enters it, and the exducer is the part of the wheel where air leaves. For compressor wheels the exducer is the outer diameter of the wheel, and the inducer is the inner diameter of the wheel. For turbine fans the inducer is the outer part of the wheel, while the exducer is the inner part of the wheel. See the pic I posted below to tell you which is which.
 The rx7 link I provided tells you how to calculate the trim of a compressor wheel. Just a little fyi when calculating trims you can just calculate it in inches or mm it doesn't matter. Trim is just the ratio of ind/exd and the trim will come out the same whether you calculate inches or mm. The link also tells you how a higher or lower trim number determines where the compressor is the most efficient. Also check out the Garrett link and look atthe products menu and the tech menu. You can use the products->turbochargers menu to calculate the trim of the compressor wheels. Use the formula in the rx7 club site or Garrett site to calculate the trim. http://www.rx7club.com/printthread.php?t=345518 http://www.turbobygarrett.com/ __________________
-1989 Ford Probe GT (stock, pos) **SOLD** -1999 EBP Civic SI (modded) **SOLD** -2001 EBP Prelude Base (almost stock) **SOLD** -1993 VR RX-7 R1 (modded, 280 RWHP) **RIP** -1991 Red CRX DX (turbo B18C in the works) -1990 White CRX DX (stock) |
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