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Old 03-04-2014, 11:34 PM   #61
goingtoscotland
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Most likely no gain to be had for the n/a guys. If the 57mmtb can handle 250hp on the ST it's more than enough for the n/a Focus
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Old 03-05-2014, 03:47 PM   #62
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Quote:
Originally Posted by goingtoscotland View Post
Most likely no gain to be had for the n/a guys. If the 57mmtb can handle 250hp on the ST it's more than enough for the n/a Focus
Your logic is flawed.

The ST and the n/a Focus share the exact same air box. If the airbox can handle enough air to support 252hp, then replacing it on the 160hp n/a Focus would yield very little if any gains (using your logic), right? Yet we've seen dyno results showing as much as 20hp gains from replacing the airbox with a well designed intake on the n/a Focus.

My point is this; just because the 57mm tb can handle enough air to support 252hp on the ST doesn't necessarily mean that the n/a Focus wont see any power benefit from the 59mm tb. We will have to wait on the dyno results to be sure.
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Old 03-05-2014, 03:58 PM   #63
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well someone needs to already get a car dynoed with the TB :D
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Old 03-05-2014, 04:16 PM   #64
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^^^^^ agreed get er' done!
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Old 03-05-2014, 05:39 PM   #65
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Quote:
Originally Posted by Deesiel678 View Post
Your logic is flawed.

The ST and the n/a Focus share the exact same air box. If the airbox can handle enough air to support 252hp, then replacing it on the 160hp n/a Focus would yield very little if any gains (using your logic), right? Yet we've seen dyno results showing as much as 20hp gains from replacing the airbox with a well designed intake on the n/a Focus.

My point is this; just because the 57mm tb can handle enough air to support 252hp on the ST doesn't necessarily mean that the n/a Focus wont see any power benefit from the 59mm tb. We will have to wait on the dyno results to be sure.
Funny that you make fun of someone else's logic of comparing it to a turboed car, when you compare the air box's without understanding a turbo.
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Old 03-05-2014, 06:04 PM   #66
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Funny that you make fun of someone else's logic of comparing it to a turboed car, when you compare the air box's without understanding a turbo.
Funny that you assume that I don't know how a turbo works. Where in my post did I indicate that? And where did I 'make fun'? I was pointing out the flaw in thinking by using a well documented example.

Slap yourself for failing to comprehend.
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Old 03-05-2014, 07:40 PM   #67
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Quote:
Originally Posted by Deesiel678 View Post
Your logic is flawed.

The ST and the n/a Focus share the exact same air box. If the airbox can handle enough air to support 252hp, then replacing it on the 160hp n/a Focus would yield very little if any gains (using your logic), right? Yet we've seen dyno results showing as much as 20hp gains from replacing the airbox with a well designed intake on the n/a Focus.

My point is this; just because the 57mm tb can handle enough air to support 252hp on the ST doesn't necessarily mean that the n/a Focus wont see any power benefit from the 59mm tb. We will have to wait on the dyno results to be sure.
You're not seeing results from the box itself so much as you're seeing results because you're not only removing some restriction which allows more air to flow through the box(a freer flowing aftermarket air filter vs stock), but also from a more dense intake charge thanks to lower temperatures. This is why dyn085's dyno results on a K&N drop in with the stock airbox show an 8+hp gain. A 2 mm larger hole going into the intake isn't going to help when the previous hole was capable of flowing way more than enough in the first place.

Say you have a 200mm throttle body for the 2.0 Ti-VCT. That's well in excess of what is required. Going to a 210mm throttle body will not give you any gains when 200mm was already more than enough. I sincerely doubt the OE TB is a bottleneck in the system.
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Old 03-06-2014, 01:26 AM   #68
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but with a better intake, couldn't the tb become a part of the bottleneck? I think that a slight increase in the tb, would still be beneficial, but yet again, i don't know if 2mm would make much of a difference even if the stock has some restriction.
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Old 03-06-2014, 01:47 AM   #69
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You kids are funny.

Lets look at Physics.

You have a circle with a diameter of 3" and one with a diameter of 4".
What is the total air pressure exerted on each?


When you can answer that, you will understand how an engine breathes.
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Old 03-06-2014, 01:49 AM   #70
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6"!!! lol. I'm not a mechanical engineer lol. what is your opinion on the subject :)
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