Cosworth Replacement Air-Filter

Sankar · 27th July 2010, 10:03

Installed Cosworth replacement air-filter in my A-Star. Apparently Cosworth are the only people with a replacement filter available for the A-Star last time i checked (which was a month ago). Filter medium is Cosworth's proprietary non woven synthetic material and the best part imho is that it is an oil-free type, so no oiled MAF sensor if you happen to over oil the filter. The recommended cleaning procedure (after 10k Kms as per them) is to soak the filter in mild soap solution and washing it under flowing water inside out, and drying naturally.

I did not expect any huge improvements in performance after installing this, but i'm pleasantly surprised about the fact that the car feels a little more peppy now, even with AC on, and it builds revs more quickly. A-Star has a typical jerk (reported by many) when throttle is let off, in slow speed city runs this can get a bit uncomfy, now after the filter this symptom has reduced by a fair amount, car feels much smoother.

The stock filter was not very dirty to begin with as you can see in the pic, so the improvements i noticed with Cosworth must be genuine.

Cosworth Replacement Air-Filter-img00102201007261249.jpg

Cosworth Replacement Air-Filter-img00105201007261825.jpg

Cosworth Replacement Air-Filter-img00108201007261828.jpg

As you can see in this photo, the K10B airbox looks a bit small.. i was wondering if the K12B airbox from Swift would do any good here? From the pics i've seen of 1.2 Swift it looks like the K12B airbox can be squeezed in there. Any thoughts?

Cosworth Replacement Air-Filter-img00110201007261828.jpg

Cosworth Replacement Air-Filter-img00113201007261837.jpg

MutantX · 27th July 2010, 10:09

Good one Shankar. Please do also report the FE after the filter change. One more question, do you have plans of replacing the filter for i10? if yes, it would be good to know the certain parameters such as gain in performance, FE etc.,

Sankar · 28th July 2010, 07:49

Hi MutantX, right now i don't have plans to do this on i10. I'd let you know if something happens on that front.

theMAG · 28th July 2010, 09:16

I'm surprised K&N didnt have an option. BTW, how much did this cost ?

Sankar · 28th July 2010, 09:45

Neither K&N nor Green Cotton have replacement filters for the A-Star and AFAIK other K10 & K12 engine vehicles. Even if others were available i still would have bought Cosworth since its oil free type. Price is Rs. 3500/-

GTO · 28th July 2010, 22:47

Nice report, and always good to hear of a positive experience. 3.5K is a decent price. Cleaning K&N's is terribly inconvenient, what with sourcing the oil et al. I used to just send my Vtec over to 4 seasons to get the job done.

Did you consider a CAI? What is the life of this air-filter? IIRC, K&N advertises theirs to last the lifetime of the car.

Vid6639 · 28th July 2010, 22:57

Quote:

Originally Posted by theMAG

I'm surprised K&N didnt have an option. BTW, how much did this cost ?

K10B engine is for the indian market and available only in few countries outside in the A-star. That means K&N hasnt really made a filter for the A-star.

The Alto and WagonR had a K&N filter available as the air box was similar to a 660cc Alto sold internationally.

Sankar · 30th July 2010, 08:08

Quote:

Originally Posted by GTO

Nice report, and always good to hear of a positive experience. 3.5K is a decent price. Cleaning K&N's is terribly inconvenient, what with sourcing the oil et al. I used to just send my Vtec over to 4 seasons to get the job done.

Did you consider a CAI? What is the life of this air-filter? IIRC, K&N advertises theirs to last the lifetime of the car.

Thanks GTO.

I didn't consider a CAI because for an otherwise stock engine i thought its wise to retain the factory airbox. I really don't have muchfaith in off the shelf generic CAI available for our cars here, unless they're made to spec. For some cars generic CAI may work and for some cars it may not make much of an improvement except sound. Have known instances were CAI have raised the IAT.

Quote:

Originally Posted by vid6639

K10B engine is for the indian market and available only in few countries outside in the A-star. That means K&N hasnt really made a filter for the A-star.

The Alto and WagonR had a K&N filter available as the air box was similar to a 660cc Alto sold internationally.

K10B is available in all markets where the 2009 Alto (AStar) is available, which means almost all of Europe and UK, few countries in the Middle East, South East Asia, South America, Australia and where ever the previous generation Alto was available.

660cc Alto was a JDM vehicle fulfilling the Kei car requirements, and few were imported to Australia and other countries by privateers.

K&N/Green doesn't have filters for K12B/K10B engines right now.

Vid6639 · 30th July 2010, 08:16

Quote:

Originally Posted by Sankar

K10B is available in all markets where the 2009 Alto (AStar) is available, which means almost all of Europe and UK, few countries in the Middle East, South East Asia, South America, Australia and where ever the previous generation Alto was available.

660cc Alto was a JDM vehicle fulfilling the Kei car requirements, and few were imported to Australia and other countries by privateers.

K&N/Green doesn't have filters for K12B/K10B engines right now.

Yeah but the one in Alto and WagonR was available only because they shared the airbox with other cars in the Suzuki stable. I can't recollect which ones.

I think K&N will have filters available for A-star and K12B models soon. I'm sure the filter in the A-star is compatible with some other cars.

Sankar · 30th July 2010, 19:25

Good news for the Swift K12 owners. AStar's Cosworth replacement filter will suit K12 Swift. They both have same airboxes, only difference is that Swift has a slightly longer intake pipe and its got a piggy back resonator.

Anyway don't quote me on this check before you buy.

nvc_4125 · 30th July 2010, 22:26

i called cosworth people and they tell that cost for swift K12 is 3500/- with delivery charges.

I m planing to covert my swift in to CNG so is this worth to put this air replacement filter in my swift K12?

Sankar · 2nd August 2010, 10:32

Sure, why not? Performance would be slightly better than with stock.

nvc_4125 · 2nd August 2010, 21:42

thanks for this info.

i m planing to change it in next mount.

Sankar · 2nd August 2010, 21:52

Do update us with the results. The difference would be noticeable.
Btw if you decide to stick the chrome decal you get alongwith it, be sure to clean the surface with colin or soap solution and wipe it dry before applying the chrome decal.

JustCause · 11th August 2010, 19:36

Quote:

Originally Posted by Sankar

Do update us with the results. The difference would be noticeable.
Btw if you decide to stick the chrome decal you get alongwith it, be sure to clean the surface with colin or soap solution and wipe it dry before applying the chrome decal.

Ordered & received the Cosworth filter for my Alto 0.8. The difference is particularly noticeable when letting go of the throttle with A/C in 1st/2nd gear.

Costs 3500Rs & ships within 2 days.

Now the chrome <COSWORTH> decal is the one I'm hesitant to put as it might become a hot favourite among Monogram/Emblem stealers.

27th July 2010, 10:03	#1
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	Cosworth Replacement Air-Filter Installed Cosworth replacement air-filter in my A-Star. Apparently Cosworth are the only people with a replacement filter available for the A-Star last time i checked (which was a month ago). Filter medium is Cosworth's proprietary non woven synthetic material and the best part imho is that it is an oil-free type, so no oiled MAF sensor if you happen to over oil the filter. The recommended cleaning procedure (after 10k Kms as per them) is to soak the filter in mild soap solution and washing it under flowing water inside out, and drying naturally. I did not expect any huge improvements in performance after installing this, but i'm pleasantly surprised about the fact that the car feels a little more peppy now, even with AC on, and it builds revs more quickly. A-Star has a typical jerk (reported by many) when throttle is let off, in slow speed city runs this can get a bit uncomfy, now after the filter this symptom has reduced by a fair amount, car feels much smoother. The stock filter was not very dirty to begin with as you can see in the pic, so the improvements i noticed with Cosworth must be genuine. As you can see in this photo, the K10B airbox looks a bit small.. i was wondering if the K12B airbox from Swift would do any good here? From the pics i've seen of 1.2 Swift it looks like the K12B airbox can be squeezed in there. Any thoughts?
	(1) Thanks

27th July 2010, 10:09	#2
MutantX BHPian Join Date: Sep 2009 Location: Madras Posts: 868 Thanked: 93 Times View My Garage	Good one Shankar. Please do also report the FE after the filter change. One more question, do you have plans of replacing the filter for i10? if yes, it would be good to know the certain parameters such as gain in performance, FE etc.,
	() Thanks

28th July 2010, 07:49	#3
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	Hi MutantX, right now i don't have plans to do this on i10. I'd let you know if something happens on that front.
	() Thanks

28th July 2010, 09:16	#4
theMAG Distinguished - BHPian Join Date: May 2006 Location: Avon, CT Posts: 7,217 Thanked: 1,807 Times View My Garage	I'm surprised K&N didnt have an option. BTW, how much did this cost ?
	() Thanks

28th July 2010, 09:45	#5
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	Neither K&N nor Green Cotton have replacement filters for the A-Star and AFAIK other K10 & K12 engine vehicles. Even if others were available i still would have bought Cosworth since its oil free type. Price is Rs. 3500/-
	() Thanks

28th July 2010, 22:47	#6
GTO Team-BHP Support Join Date: Feb 2004 Location: Bombay Posts: 70,534 Thanked: 300,737 Times View My Garage	Nice report, and always good to hear of a positive experience. 3.5K is a decent price. Cleaning K&N's is terribly inconvenient, what with sourcing the oil et al. I used to just send my Vtec over to 4 seasons to get the job done. Did you consider a CAI? What is the life of this air-filter? IIRC, K&N advertises theirs to last the lifetime of the car.
	() Thanks

30th July 2010, 19:25	#10
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	Good news for the Swift K12 owners. AStar's Cosworth replacement filter will suit K12 Swift. They both have same airboxes, only difference is that Swift has a slightly longer intake pipe and its got a piggy back resonator. Anyway don't quote me on this check before you buy.
	() Thanks

30th July 2010, 22:26	#11
nvc_4125 BHPian Join Date: Jun 2007 Location: Surat Posts: 40 Thanked: Once	i called cosworth people and they tell that cost for swift K12 is 3500/- with delivery charges. I m planing to covert my swift in to CNG so is this worth to put this air replacement filter in my swift K12?
	() Thanks

2nd August 2010, 10:32	#12
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	Sure, why not? Performance would be slightly better than with stock.
	() Thanks

2nd August 2010, 21:42	#13
nvc_4125 BHPian Join Date: Jun 2007 Location: Surat Posts: 40 Thanked: Once	thanks for this info. i m planing to change it in next mount.
	() Thanks

2nd August 2010, 21:52	#14
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	Do update us with the results. The difference would be noticeable. Btw if you decide to stick the chrome decal you get alongwith it, be sure to clean the surface with colin or soap solution and wipe it dry before applying the chrome decal.
	() Thanks