ASM header
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Joined: Jun 2007
Posts: 927
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From: Perth, Western Australia
Sorry guys, I didn't have chance to dyno it and I installed the header together with test pipe as well.
As far as my butt concerns, I could feel extra midrange the most and bit of both top and low end, it also smoothen vtec crossover as it's not noticeable that much anymore.
On the brightside, I could only get 200km per half tank prior to header and test pipe but now I can get 300km half tank.
FYI, I (2002 s2k) raced my friend (2007 S2k)with J's FX60RS, J's Header, Spoon TB and Gruppem Intake when he had one passenger (around 70ish kg) from around 80 km/h and I pulled on him from 3rd (80 km/h) until almost end of 4th around 1/2 car length but then he overtook me at the end of 4th and on 5th gear as his car has a better top end.
Sorry for the vague review but this is the best I could do.
Hopefully someone else will buy this header and dyno it
so far it's been great.
P.S My mods are BYS Dual Exhaust, Berk Testpipe, ASM Header and AFE Filter.
As far as my butt concerns, I could feel extra midrange the most and bit of both top and low end, it also smoothen vtec crossover as it's not noticeable that much anymore.
On the brightside, I could only get 200km per half tank prior to header and test pipe but now I can get 300km half tank.
FYI, I (2002 s2k) raced my friend (2007 S2k)with J's FX60RS, J's Header, Spoon TB and Gruppem Intake when he had one passenger (around 70ish kg) from around 80 km/h and I pulled on him from 3rd (80 km/h) until almost end of 4th around 1/2 car length but then he overtook me at the end of 4th and on 5th gear as his car has a better top end.
Sorry for the vague review but this is the best I could do.
Hopefully someone else will buy this header and dyno it
so far it's been great.P.S My mods are BYS Dual Exhaust, Berk Testpipe, ASM Header and AFE Filter.
Registered User
Joined: Jun 2007
Posts: 927
Likes: 0
From: Perth, Western Australia
I couldn't really give a thumb down against ASM header as my result is not very conclusive and couldn't really justify spending that much on a header as well at the first place.
Who knows the car will transform after I get an ecu and proper intake.
carrera4: have a look at asm blog, they compared both header and explain the difference between 2 models but I couldn't really understand their point even with google translator.
Who knows the car will transform after I get an ecu and proper intake.
carrera4: have a look at asm blog, they compared both header and explain the difference between 2 models but I couldn't really understand their point even with google translator.
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Joined: Feb 2005
Posts: 764
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From: Sheppard AFB, Texas
Why oh why do people waste money on these ridiculously overpriced headers? For what - 5 or 6 whp. Maybe?
Face it. Honda did not, when creating the most efficient production N/A engine in the world, go to their engineers and say: "Hey guys, make sure you design a sub-optimal header - you know the aftermarket companies need to stay in business too".
Often these headers just shift the powerband around. Only very recently did C-West change out the stock header on their all-CF racing S2000 - upon which they have otherwise spent a fortune. They went with the Mugen, and I suspect it's simply because there was no further room for optimization and, in racing, every tiny bit counts.
Certainly, it was not at the top of their priority list. it shouldn't be at the top of anyone else's either. Unless you just enjoy spending money (btw, ASM makes some great $552 hood dampers as well) for no particular reason.
Get some 4.57 gears if you want to improve N/A performance. Otherwise, save your money and go FI.
Face it. Honda did not, when creating the most efficient production N/A engine in the world, go to their engineers and say: "Hey guys, make sure you design a sub-optimal header - you know the aftermarket companies need to stay in business too".
Often these headers just shift the powerband around. Only very recently did C-West change out the stock header on their all-CF racing S2000 - upon which they have otherwise spent a fortune. They went with the Mugen, and I suspect it's simply because there was no further room for optimization and, in racing, every tiny bit counts.
Certainly, it was not at the top of their priority list. it shouldn't be at the top of anyone else's either. Unless you just enjoy spending money (btw, ASM makes some great $552 hood dampers as well) for no particular reason.
Get some 4.57 gears if you want to improve N/A performance. Otherwise, save your money and go FI.
Joined: Nov 2006
Posts: 5,217
Likes: 4
- Header and exhaust port design is heavily influenced by emissions targets not absolute performance.
- Alternative header designs can be much more expensive to manufacture and make the engine more difficult to service (the sequential header).
- All auto manufactures, including Honda, are not incentivized in terms of the marginal gain to sales to drag the last drop of power out of the exhaust system.
- The best headers on the market aren't that much better unless paired with complementing parts. A larger exhaust, a test pipe, cams, etc. Adding a J's header to an otherwise stock car is a complete waste of money.
- The gains made by aftermarket companies have not been acheived easily or without effort. Nearly 10 firms have all made incremental improvements that have been built upon by others, the end result being what you have today. I would speculate that the knowledge and time applied to the S2000 header in the aftermarket exceeds that at Honda while the aftermarket also is incentivized to produce higher performance, whereas the OEM is not (to the same degree).
- Alternative header designs can be much more expensive to manufacture and make the engine more difficult to service (the sequential header).
- All auto manufactures, including Honda, are not incentivized in terms of the marginal gain to sales to drag the last drop of power out of the exhaust system.
- The best headers on the market aren't that much better unless paired with complementing parts. A larger exhaust, a test pipe, cams, etc. Adding a J's header to an otherwise stock car is a complete waste of money.
- The gains made by aftermarket companies have not been acheived easily or without effort. Nearly 10 firms have all made incremental improvements that have been built upon by others, the end result being what you have today. I would speculate that the knowledge and time applied to the S2000 header in the aftermarket exceeds that at Honda while the aftermarket also is incentivized to produce higher performance, whereas the OEM is not (to the same degree).
Registered User
Joined: Feb 2006
Posts: 1,991
Likes: 3
From: Blue Bell, PA
Originally Posted by Kondor999,Feb 14 2008, 04:48 AM
Why oh why do people waste money on these ridiculously overpriced headers? For what - 5 or 6 whp. Maybe?
Face it. Honda did not, when creating the most efficient production N/A engine in the world, go to their engineers and say: "Hey guys, make sure you design a sub-optimal header - you know the aftermarket companies need to stay in business too".
Often these headers just shift the powerband around. Only very recently did C-West change out the stock header on their all-CF racing S2000 - upon which they have otherwise spent a fortune. They went with the Mugen, and I suspect it's simply because there was no further room for optimization and, in racing, every tiny bit counts.
Certainly, it was not at the top of their priority list. it shouldn't be at the top of anyone else's either. Unless you just enjoy spending money (btw, ASM makes some great $552 hood dampers as well) for no particular reason.
Get some 4.57 gears if you want to improve N/A performance. Otherwise, save your money and go FI.
Face it. Honda did not, when creating the most efficient production N/A engine in the world, go to their engineers and say: "Hey guys, make sure you design a sub-optimal header - you know the aftermarket companies need to stay in business too".
Often these headers just shift the powerband around. Only very recently did C-West change out the stock header on their all-CF racing S2000 - upon which they have otherwise spent a fortune. They went with the Mugen, and I suspect it's simply because there was no further room for optimization and, in racing, every tiny bit counts.
Certainly, it was not at the top of their priority list. it shouldn't be at the top of anyone else's either. Unless you just enjoy spending money (btw, ASM makes some great $552 hood dampers as well) for no particular reason.
Get some 4.57 gears if you want to improve N/A performance. Otherwise, save your money and go FI.
Gears should be the first mod period (that is if the driver mod is complete :-) ).
Everything else is just 'cosmetic'.
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Joined: Feb 2005
Posts: 764
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From: Sheppard AFB, Texas
Originally Posted by carrera4,Feb 14 2008, 10:22 AM
- The best headers on the market aren't that much better unless paired with complementing parts. A larger exhaust, a test pipe, cams, etc. Adding a J's header to an otherwise stock car is a complete waste of money.
In any case, I think this is one of the worst $/whp mods you can make on the S. Like I said: get some gears and start saving for FI if you want to go fast.
Nothing else makes much sense unless you *have* to stay NA for some reason - such as racing or CARB requirements.
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