whats a good filter for my turbo?
whats a good filter for my turbo?
12-15-13, 12:37 PM
#4
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For looks, HKS offers their filters in several colors that you can match to your car. They only make kits for specific models, but you could use a 80-200mm or 100-200mm filter and adapt it to a custom pipe for your car. The dry filters last about 12 months, and the wet filters last about 6 months.
If you don't like the HKS filter, then you could either make a custom air box with a panel filter, or you could use a cone filter. I personally like the K&N filters because they are of high quality, used by many professional race teams, last up to 10 years or a million miles, and come in many shapes and sizes. See the universal section for sizes that will fit in your particular engine bay. If you over-size the filter, there will be no adverse performance effects, and the filter will last longer before it needs to be cleaned or replaced.
K&N Universal Clamp-on Air Filters for a Variety of Universal Air Filter Applications
12-15-13, 08:15 PM
#5
MECP Certified Installer
Every major brand functions, so just avoid the cheapie Ebay filters and you will be OK. Also, ensure that you do not use the filter longer than its standard service life or it will start disintegrate with age and get sucked into the engine, regardless of the brand.
For looks, HKS offers their filters in several colors that you can match to your car. They only make kits for specific models, but you could use a 80-200mm or 100-200mm filter and adapt it to a custom pipe for your car. The dry filters last about 12 months, and the wet filters last about 6 months.
If you don't like the HKS filter, then you could either make a custom air box with a panel filter, or you could use a cone filter. I personally like the K&N filters because they are of high quality, used by many professional race teams, last up to 10 years or a million miles, and come in many shapes and sizes. See the universal section for sizes that will fit in your particular engine bay. If you over-size the filter, there will be no adverse performance effects, and the filter will last longer before it needs to be cleaned or replaced.
K&N Universal Clamp-on Air Filters for a Variety of Universal Air Filter Applications
For looks, HKS offers their filters in several colors that you can match to your car. They only make kits for specific models, but you could use a 80-200mm or 100-200mm filter and adapt it to a custom pipe for your car. The dry filters last about 12 months, and the wet filters last about 6 months.
If you don't like the HKS filter, then you could either make a custom air box with a panel filter, or you could use a cone filter. I personally like the K&N filters because they are of high quality, used by many professional race teams, last up to 10 years or a million miles, and come in many shapes and sizes. See the universal section for sizes that will fit in your particular engine bay. If you over-size the filter, there will be no adverse performance effects, and the filter will last longer before it needs to be cleaned or replaced.
K&N Universal Clamp-on Air Filters for a Variety of Universal Air Filter Applications
the stock airbox is really not a bad design and you can even modify it. If you are keeping the stocker, just use paper or a K&N drop in. Paper catches a lot of ****, so you have to keep an eye on it. Oiled gauze like the K&N, not so much, but you get a longer service interval and can clean it.
12-15-13, 09:03 PM
#6
When I was shopping for a bigger filter for my TII I called one of the companies offering dry filters and asked which flowed more, the traditional pleated oiled filter or the newer pleated dry filters.
I was told the traditional pleated oiled filters flowed more.
On my TII I went from 3" inlet 9" long filter to 6" inlet 10" long filter w/ velocity stack on my piddly 380rwhp stock hybrid and datalogs showed an improvement in boost response.
It makes sense, any pressure drop in front of the turbo affects the pressure ratio at the outlet of the turbo.
My thread from '09.
https://www.rx7club.com/single-turbo...k-pics-865265/
I was told the traditional pleated oiled filters flowed more.
On my TII I went from 3" inlet 9" long filter to 6" inlet 10" long filter w/ velocity stack on my piddly 380rwhp stock hybrid and datalogs showed an improvement in boost response.
It makes sense, any pressure drop in front of the turbo affects the pressure ratio at the outlet of the turbo.
My thread from '09.
https://www.rx7club.com/single-turbo...k-pics-865265/
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12-19-13, 11:06 PM
#8
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There isn't a standard formula because:
- There is no standard tolerance for acceptable pressure loss.
- There is no standard for filtration efficiency.
- There is no standard for filter life or cleaning interval.
- Given the various filter shapes and sizes, the only way to standardize a formula is to yield results in terms of area. However, different brands of filters have varying characteristics for a given filter area, and most brands do not give these statistics to the general public.
- You stated that looks were important, and I am not aware of any logical method to rate filters by a subjective attribute.
If you intend to use a K&N filter, then you can use the formula on their website. However, you will need to adjust their NA piston engine formula to work with a turbocharged rotary engine.
K&N Air Filter Facts You Should Know
If you don't have a solid background in physics to adjust their formula, then I have over-simplified it to Horsepower / 4.53 = Filter media area square inches. This formula is just an approximation, but K&N's formula isn't much better because it makes a lot of generic assumptions. When in doubt, use a larger filter if it will fit in the car.
A bell mouth inlet is the most efficient subsonic inlet known at this time. I think your gains were from the "velocity stack".
- There is no standard tolerance for acceptable pressure loss.
- There is no standard for filtration efficiency.
- There is no standard for filter life or cleaning interval.
- Given the various filter shapes and sizes, the only way to standardize a formula is to yield results in terms of area. However, different brands of filters have varying characteristics for a given filter area, and most brands do not give these statistics to the general public.
- You stated that looks were important, and I am not aware of any logical method to rate filters by a subjective attribute.
If you intend to use a K&N filter, then you can use the formula on their website. However, you will need to adjust their NA piston engine formula to work with a turbocharged rotary engine.
K&N Air Filter Facts You Should Know
If you don't have a solid background in physics to adjust their formula, then I have over-simplified it to Horsepower / 4.53 = Filter media area square inches. This formula is just an approximation, but K&N's formula isn't much better because it makes a lot of generic assumptions. When in doubt, use a larger filter if it will fit in the car.
A bell mouth inlet is the most efficient subsonic inlet known at this time. I think your gains were from the "velocity stack".
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