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  #11  
Old 12-16-2005, 10:11 PM
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Originally Posted by retroshark
thanks for the sticky, but if i want to edit anything is there any way that i can?
I was looking for a way to give you edit permission to the thread once it's stuck, but was un able to find anything. I'm going to remove the stiky until you are until you tell me other wise.
  #12  
Old 12-17-2005, 02:12 AM
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ok man, i appreciate it. ill get on writing abou turbo sizes soon.
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Old 12-17-2005, 07:26 PM
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nice, can't wait to see it. great job so far.
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Old 12-18-2005, 05:33 AM
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thanks

anything to help fellow 6th gen owners.
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2002 Honda Accord Coupe 5spd
Turbo - 3" exhaust - obd1 - stage 5 act - 450cc - ground controls - mad tyte JDM goodies
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Old 08-14-2006, 07:59 PM
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What happen here? why did the knowledge stop?
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Old 08-14-2006, 08:02 PM
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lol, people get busy

retro how's your build going anyways, all done?
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Old 08-14-2006, 11:47 PM
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It's been almost a year, at least he could stop by and say here is where I'm @........... but whatever!
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Old 01-30-2007, 04:11 PM
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Bringing this thread back from the dead...

On the topic of turbo sizing, here's a few pictures I found that I think give a pretty plain explanation of all the measurements (trim, compressor size, a/r size).

A/R ratio:

This is a measure of volumetric efficiency. A water hose is the best example I've seen to explain this. Imagine you have a waterhose with no nozzle on it. You're watering your grandmothers's garden with it, and she has one of those stupid pin-wheels stuck in the ground. Your ADHD kicks in and you begin to run the water over the pinwheel. It spins like a geo metro with 22's. boring... So you grab the super-ultra-turbo nozzle from the garage and tighten it down. Aim and squeeze. The water jets out bashing the blades of the pin-wheel like a cinder block landing on a baby duckling. That pin-wheel now resembles a pro 5.0 half way down the track.

Putting that nozzle on, you're flowing less volume, but you've increased the pressure of the water exiting the hose.






So... larger a/r = more volume. More volume/larger a/r is great if you've got a stroked and bored 5.7L with more flow than the Mississippi river. A more minute sized motor like those in our Hondas, won't flow anywhere near this much, and the goal when choosing a turbo is to find one with maximum efficiency for your vehicle's flow capabilities. For example, a typical T3/TO4 57 trim turbo and a .48a/r housing might be most efficient between 3000-6000rpms, and capable of up to 300whp on an F23. The same turbo with a .63a/r might be between 3500~7300rpms, capable of 450hp, and a turbo with a .82 A/R housing might be good for 5000-9000rpms, and capable of 650hp. Though with the F23, anything over 6000rpms is nearly pointless unless you've had headwork done, and have an upgraded valve train as a minimum. Even then you might top out around 7200rpms, making a turbo larger than .63a/r very ineffective and inefficient for this particular motor. Still with me?

Let's move to Trim:

Trim is very simple. Trim is calculated by taking the square of the exducer's diameter, divided by the square of the inducer's diameter, and multiplied by 100.





Work in Progress... More to come...
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  #19  
Old 01-31-2007, 12:13 AM
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good analysis afaccord
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Originally Posted by Danny
the s2k is like a hot lesbian with a 9k rpm tongue. the sti...is like a hardcore porn star...that likes @ss to mouth.
  #20  
Old 03-07-2007, 10:26 AM
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Hmm great.. Little by little I'm gaining the knowledge to turbo my sleeper woot. So the bigger the turbo the more lag correct? A t3/to4 with a 57 trim and .48a/r would be great for our cars to turn 10 psi daily and not have to work on our trannys? How much psi's do you think u could run for a race or two? 20-25?
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Originally Posted by mnaccord View Post
Fuqking clean
take notes people - this is the proper way to do an accord
READ & SEARCH STOP ASKING DUMB QUESTIONS!
Fo' Do's Mo' Ho's #001
Hid Kit Club! #001.
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http://board.accordtuner.com/showthread.php?t=32734
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