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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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| 4.9 EF Futura |
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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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| Interceptor |
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{USERNAME} 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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| Dansedgli |
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Then whats with the figures he gave us as options?
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| Two-stroke-turbo |
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{USERNAME} 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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| Dansedgli |
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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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| EBXR8380 |
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http://www.turbomustangs.com/turbotech/main.htm
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| CHEF |
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Dont go any smaller than a 1.00 ex, and 0.6 comp on a garrett T4, To4 variant...
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| maddog |
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{USERNAME} 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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| Dellboy999 |
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{USERNAME} wrote: {USERNAME} 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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| 4.9 EF Futura |
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{USERNAME} wrote: Then whats with the figures he gave us as options?
My point exactly?!?!?!?!?!?!?!?!?!?!?!?!?!?
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