How important is a tune...
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EMU is best compromise between standalone like AEM and halfing it like VAFC. I paid about $700 brand new with harness.
I don't know how much gains you will get, since you are AP2, but my AP1 gained like 19HP and like 13 TQ. I had K&N FIPK and Rick's header.
I don't know how much gains you will get, since you are AP2, but my AP1 gained like 19HP and like 13 TQ. I had K&N FIPK and Rick's header.
Joined: Jan 2006
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From: location, location
Originally Posted by Terror,Sep 8 2009, 02:34 AM
In my eyes, a safe A/F is anything above 11.5 and below 13.2-13.5.
If you get your car tuned in the future, try for a 13.2 or around there. I've seen cars make power at 13.5, but that is too lean in my opinion.
If you get your car tuned in the future, try for a 13.2 or around there. I've seen cars make power at 13.5, but that is too lean in my opinion.
This car knows the score, couldnt of said it better myself.
Mod's dont always equal running too lean, depends on what you add and their design.
Joined: Apr 2006
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From: Clifton, NJ
My car: 2007, T1R 70mm with test pipe, K&N intake, J's header: 16:1 AFR
Friends car: 2006, T1R 63mm with test pipe, K&N intake, stock header: 15:1 AFR
2006+ are better tuned from the factory than previous years, and therefore more susceptible to running lean when adding flow mods, especially a test pipe which removes considerable restriction caused by the stock catalytic converter
Even on the same dyno, there was a 2004 or 2005 with the full J's treatment (J's 70 rr headerback, J's header, etc) that ran a 15-16:1.
Friends car: 2006, T1R 63mm with test pipe, K&N intake, stock header: 15:1 AFR
2006+ are better tuned from the factory than previous years, and therefore more susceptible to running lean when adding flow mods, especially a test pipe which removes considerable restriction caused by the stock catalytic converter
Even on the same dyno, there was a 2004 or 2005 with the full J's treatment (J's 70 rr headerback, J's header, etc) that ran a 15-16:1.
Thread Starter
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Joined: Nov 2005
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From: Virgnia
Lots of great info in here, thanks guys!
Well, I might be running the Toda or ASM exhaust manifold along with the ASM exhaust. But, I'm hoping that the exhaust being just a 60mm, shouldn't make the car TOO lean. We'll see.
Well, I might be running the Toda or ASM exhaust manifold along with the ASM exhaust. But, I'm hoping that the exhaust being just a 60mm, shouldn't make the car TOO lean. We'll see.
Joined: Sep 2004
Posts: 4,894
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From: Tampa, FL
Originally Posted by devs2k,Sep 8 2009, 04:59 PM
My car: 2007, T1R 70mm with test pipe, K&N intake, J's header: 16:1 AFR
Friends car: 2006, T1R 63mm with test pipe, K&N intake, stock header: 15:1 AFR
2006+ are better tuned from the factory than previous years, and therefore more susceptible to running lean when adding flow mods, especially a test pipe which removes considerable restriction caused by the stock catalytic converter
Even on the same dyno, there was a 2004 or 2005 with the full J's treatment (J's 70 rr headerback, J's header, etc) that ran a 15-16:1.
Friends car: 2006, T1R 63mm with test pipe, K&N intake, stock header: 15:1 AFR
2006+ are better tuned from the factory than previous years, and therefore more susceptible to running lean when adding flow mods, especially a test pipe which removes considerable restriction caused by the stock catalytic converter
Even on the same dyno, there was a 2004 or 2005 with the full J's treatment (J's 70 rr headerback, J's header, etc) that ran a 15-16:1.
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Joined: Aug 2005
Posts: 1,545
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From: Glenview/Northbrook
I am running K&N Fipk, 70mm TP, Greddy Ti-C Single and gained 9 hp/10tq up top and gains in the midrange up to 25hp's That is just with a VAFC2. I picked it up for cheap $200-$250 w/ Frog harness, plus the tune. Well worth it. Tune isn't necessary, but it will maximize your mods.
Joined: Aug 2007
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I'm installing J's header + Invidia TP + T1R 70 EM Dual this weekend (K&N FIPK already installed) and shortly after that I should be getting Emanage Ultimate pretuned from holyrollerdyno (EMU Chrome).
I read a lot of threads about it and after conversation with Giles from holyrollerdyno decided to go EMU and pre-loaded maps just to be safe.
Here is some info I got from Giles that might be helpful for you as well (it was very helpful for me since I didn't know anything about A/F ratios and what is bad or good):
I read a lot of threads about it and after conversation with Giles from holyrollerdyno decided to go EMU and pre-loaded maps just to be safe.
Here is some info I got from Giles that might be helpful for you as well (it was very helpful for me since I didn't know anything about A/F ratios and what is bad or good):
The mods that you have are air flow modifications, enabling more air to get in and out of the engine. The problem there is that the S2000 doesn't have an air flow monitoring system, i.e. Mass Airflow Sensor, so it has no clue about these changes and as such still injects the same amount of fuel as before, therefore running very lean, especially during VTEC where there is no back pressure from the cat in the exhaust anymore to help keep fuel in the cylinder. If the sound of your exhaust sounds thinner than stock then you are running lean. Given your mods I would be 99% sure that you are running very lean during VTEC. We've seen some hit an AFR of 17:1 before tuning. It is not good to run with the car like this. The pistons will get very, very hot as will the plugs and start to cause damage.
With or without the e-Manage it takes about 30 minutes to one hour of driving for the fuel trims to stabilise. Without the e-Manage the fuel trims will probably be at larger numbers than with the e-Manage. The big problem with the S is that it doesn't have multizone fuel trimes, i.e. it uses the same long term fuel trim at full throttle as it does at idle. This is not helpful for modded cars. With the e-Manage we tune the fuel so that the fuel trims are consistent across the load and rpm bands.
With or without the e-Manage it takes about 30 minutes to one hour of driving for the fuel trims to stabilise. Without the e-Manage the fuel trims will probably be at larger numbers than with the e-Manage. The big problem with the S is that it doesn't have multizone fuel trimes, i.e. it uses the same long term fuel trim at full throttle as it does at idle. This is not helpful for modded cars. With the e-Manage we tune the fuel so that the fuel trims are consistent across the load and rpm bands.