short ram air or cold air????
which wud b better to put on my stock 87 rx7 NA......short ram or cold air??
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cold air.
search man. there are plenty of threads covering this. |
what would be better is if you wrote in english,
replacing the intake will result in greater heatsoak, so just stick with the stock one put a k&n filter in and your good |
Originally Posted by VacavilleFC
what would be better is if you wrote in english,
replacing the intake will result in greater heatsoak, so just stick with the stock one put a k&n filter in and your good |
Originally Posted by Unseen24-7
So you're saying that a K&N replacement drop-in, will give just as much performance as a full cold air setup?? (NOTE: not flaming, just asking)
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I'm not sure what you guys are saying here, I see different ways of reading some of the statements made so far.
Isn't ram air essentially cold air plus extra intake pressure? |
Originally Posted by j_owen07
which wud b better to put on my stock 87 rx7 NA......short ram or cold air??
Originally Posted by VacavilleFC
...stick with the stock one put a k&n filter in and your good
Originally Posted by SpeedOfLife
Isn't ram air essentially cold air plus extra intake pressure?
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Originally Posted by NZConvertible
A true ram air intake is a forward-facing intake located a point of high-pressure, undisturbed air. By definition then this is also a "cold air" intake, since it's taken from outside the engine bay.
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Originally Posted by NZConvertible
"Short ram" is a completely bogus marketing term used to sell over-priced pipes to kids who don't know any better. Unless you plan on having something stick up through a hole in your hood, your intake will be neither "short" nor "ram".
Originally Posted by NZConvertible
Complete waste of money. You will see ZERO power improvement from upgrading just the filter. The filter's restriction is a tiny fraction of the restriction from the rest of the intake and exhaust systems.
$55 K&N Drop-In Filter (10 years) $10 K&N Recharge Kit (10 years) $65 Total for 10 years $27 Stock Air Filter (30 months) x4 $108 Total for 10 years $108 -$65 = $43 savings of K&N vs. stock filter over 10 years
Originally Posted by NZConvertible
A true ram air intake is a forward-facing intake located a point of high-pressure, undisturbed air. By definition then this is also a "cold air" intake, since it's taken from outside the engine bay.
Also, "undisturbed" is not such a great term to use in this definition as per aerodynamics, but I suppose the regular forum members will take that meaning the way you intended.
Originally Posted by SpeedOfLife
That's why I asked, because yes it's taking air straight from outside.
Also, "ram air" often describes an intake that generates a ram air pressure rise. The commercial "ram air intakes", including those on most of the American muscle cars, do NOT do this. An actual ram air rise intake requires a closed system with a divergent duct, and there is a ram air temperature RISE associated with any boost pressure that is produced. Warning - The Wikipedia article on ram-air intake is WRONG! Hopefully I will have some time to edit it soon. Dang open-source dillweeds.... :bash: |
Originally Posted by Evil Aviator
Also, "ram air" often describes an intake that generates a ram air pressure rise. The commercial "ram air intakes", including those on most of the American muscle cars, do NOT do this. An actual ram air rise intake requires a closed system with a divergent duct, and there is a ram air temperature RISE associated with any boost pressure that is produced.
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Originally Posted by SpeedOfLife
I haven't been going off commercial products. It should be obvious that a ram air system won't work right if it doesn't have a sealed system with positive pressure at the entry point.
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Like so on the right side of this illustration:
http://www.globalsecurity.org/milita...06/Fig2-10.gif That's interesting and good to know. |
Originally Posted by Evil Aviator
That is usually true for a TII or ported NA engine, but a mostly stock NA can usually see a very slight power increase from the drop-in K&N filter.
Have a read of this and see what you think. http://autospeed.drive.com.au/cms/A_2232/article.html Also, the K&N drop-in is not a complete waste of money, and will actually save money if the car is retained for the entire 10 year or million mile life of the filter. $43 savings of K&N vs. stock filter over 10 years A true cold air intake would chill the air below ambient temperature. Therefore, "Cold Air Intake" is yet another bogus term. |
Originally Posted by Unseen24-7
So you're saying that a K&N replacement drop-in, will give just as much performance as a full cold air setup?? (NOTE: not flaming, just asking)
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