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which A/R is better 

 

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 Post subject: which A/R is better
Posted: Thu Jun 09, 2005 7:45 pm 
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just wandering wich Turbo A/R is better.

A/R: 4,0
A/R: 14
A/R: 11

which one is better for low down power?
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Posted: Thu Jun 09, 2005 7:55 pm 
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Rough guide:

16.5:1 = best fuel economy. Never tune an engine to run this lean under load
14.7:1 = stoich ratio for petrol.
13.3:1 = lean best torque. This is a dangerous tune.
12.2:1 = safe best torque. Ideal for wide open throttle.
11.5:1 = rich best torque.

In answer to your question.... 12.2 - 12.5 ideal for torque at WOT, without being too aggressive.

 

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Posted: Thu Jun 09, 2005 8:18 pm 
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4.9 EF Futura wrote:
Rough guide:

16.5:1 = best fuel economy. Never tune an engine to run this lean under load
14.7:1 = stoich ratio for petrol.
13.3:1 = lean best torque. This is a dangerous tune.
12.2:1 = safe best torque. Ideal for wide open throttle.
11.5:1 = rich best torque.

In answer to your question.... 12.2 - 12.5 ideal for torque at WOT, without being too aggressive.

he's asking for the aspect ratio for the turbo, not the air-fuel ratio

 

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Posted: Thu Jun 09, 2005 8:39 pm 
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Then whats with the figures he gave us as options?
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 Post subject: a**
Posted: Thu Jun 09, 2005 8:48 pm 
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Dansedgli wrote:
Then whats with the figures he gave us as options?


LOL i dont mean air/ fuel i mean turbo A/R they are the three ratios that i have they are three different Tubos. so i want a turbo that would spool up quick and have good low down RMP that all im asking.
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Posted: Thu Jun 09, 2005 8:54 pm 
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Ill think you will find they arent same A/R figures between turbos.

Mine is 1.06.

On most turbos they are something like .63, .82, .96, 1.0, 1.06, 1.15 etc etc

The AR means nothing if you know nothing else about the turbo.

We need more info.
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Posted: Thu Jun 09, 2005 11:01 pm 
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http://www.turbomustangs.com/turbotech/main.htm

 

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Posted: Fri Jun 10, 2005 12:03 am 
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Posted: Fri Jun 10, 2005 5:29 pm 
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4.9 EF Futura wrote:
Rough guide:

16.5:1 = best fuel economy. Never tune an engine to run this lean under load
14.7:1 = stoich ratio for petrol.
13.3:1 = lean best torque. This is a dangerous tune.
12.2:1 = safe best torque. Ideal for wide open throttle.
11.5:1 = rich best torque.

In answer to your question.... 12.2 - 12.5 ideal for torque at WOT, without being too aggressive.



right answer, just wrong question
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Posted: Fri Jun 10, 2005 5:39 pm 
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maddog wrote:
4.9 EF Futura wrote:
Rough guide:

16.5:1 = best fuel economy. Never tune an engine to run this lean under load
14.7:1 = stoich ratio for petrol.
13.3:1 = lean best torque. This is a dangerous tune.
12.2:1 = safe best torque. Ideal for wide open throttle.
11.5:1 = rich best torque.

In answer to your question.... 12.2 - 12.5 ideal for torque at WOT, without being too aggressive.



right answer, just wrong question


So if at WOT i had say around 14 - 13.5 I would be running lean ?

 

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Posted: Fri Jun 10, 2005 5:46 pm 
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Dansedgli wrote:
Then whats with the figures he gave us as options?


My point exactly?!?!?!?!?!?!?!?!?!?!?!?!?!?

 

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