AP1 tuned with Haltech Pro Plugin by Evans Tuning
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Joined: Jan 2009
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^^^ Dude i agree 100%...the first thing i spent my $ on on this car was kw coils, wheels, and tires. All im sayin is if your doing 2 or 3 power mods, you might as well go all out. Stock power with just suspension and tires lapping someone is different than saying i have intake header and exhaust ecu and tune. You already have chased after power.
Joined: Nov 2009
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From: south florida
Very true, although I think Honda used the tb from the b18c5 because the itr is a monster, so I would say the ITR tb is big for the b18 but not necesarily too small for the s2k. 195hp is a lot for a b18 which goes to show how important it is, esp because the b series doesnt have the coil pack and ecu technology the f and k have. I think stock tb is very good on a s2k stock, but once modding and tuning starts itb is a must. But with so much breathing, bigger is def better, and is amplified by any time of ram air effect. Stock tb cant cope with ram air. The main issue isnt with the primaries, but the end where the 4 connect and receive air from the single throttle. There is too much turbulence here, and too much mess. This matters a lot when the only force sucking air in in a N/a setup is the vacum pressure. When you have vaccum pressure it should be able to breath 100% free as it pleases, not 1 throttle controlling 4 cylinders. I am not sure if itb will add that much power, even though it should on paper, but response is VERY important on a racetrack, and the response is unparalleled with itb. It only makes sense.
For example take a look at the tb on a k24 (tsx), one on a k20 rsx-s, and one on a newer civic si, and a base rsx. They are all different, and they each act in a different way. On my rsx-s i had a stock tb, and my friend with a same MY rsx with a same setup upgraded to the larger better shaped (straighter more like a s2000 tb) si manifold (RBC) i believe its called and saw much better gains with the same injen cai we both had. We were both untuned and he showed strong gains. This goes to show how air acts matters esp at high revs.
For example take a look at the tb on a k24 (tsx), one on a k20 rsx-s, and one on a newer civic si, and a base rsx. They are all different, and they each act in a different way. On my rsx-s i had a stock tb, and my friend with a same MY rsx with a same setup upgraded to the larger better shaped (straighter more like a s2000 tb) si manifold (RBC) i believe its called and saw much better gains with the same injen cai we both had. We were both untuned and he showed strong gains. This goes to show how air acts matters esp at high revs.
yeah the intake manifold design on the rsx-s isn't the best. the stock prb and even the prc that came on the ep3 and dc5 type-r's isn't all that great when compared to the rbc intake manifold. like you said it's the better runner design. it's designed to make more power top end without sacrficing power in the mid range. the rbc intake manifold has become the norm for anyone modding a k-series lol.
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Joined: May 2010
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From: NYC
I don't know the altitude of Evans tuning (I guess you could look it up based on their address). Temps were maybe just around 50 degrees ambient and humidity I'd say quite low (it was a generally cold dry day). I don't know what a stock AP1 does on the Evans dyno either. Frankly, I wasn't really concerned with the final numbers but more about what gains I could get in the midrange so it is what it is. Having driven several S2000s of different configurations now, I can say that power-wise my car now approximately feels like an AP2 with typical boltons untuned except it's got a smoother, lower VTEC engagement and of course a lot more revs. It definitely does not have the torque of a tuned AP2 which can gain a lot due to the added displacement.
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Joined: Aug 2009
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From: Yardley/Levittown, pa
I don't know the altitude of Evans tuning (I guess you could look it up based on their address). Temps were maybe just around 50 degrees ambient and humidity I'd say quite low (it was a generally cold dry day). I don't know what a stock AP1 does on the Evans dyno either. Frankly, I wasn't really concerned with the final numbers but more about what gains I could get in the midrange so it is what it is. Having driven several S2000s of different configurations now, I can say that power-wise my car now approximately feels like an AP2 with typical boltons untuned except it's got a smoother, lower VTEC engagement and of course a lot more revs. It definitely does not have the torque of a tuned AP2 which can gain a lot due to the added displacement.
Nice Numbers BTW!
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Joined: Jan 2009
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Originally Posted by steguis' timestamp='1321642344' post='21168239
I don't know the altitude of Evans tuning (I guess you could look it up based on their address). Temps were maybe just around 50 degrees ambient and humidity I'd say quite low (it was a generally cold dry day). I don't know what a stock AP1 does on the Evans dyno either. Frankly, I wasn't really concerned with the final numbers but more about what gains I could get in the midrange so it is what it is. Having driven several S2000s of different configurations now, I can say that power-wise my car now approximately feels like an AP2 with typical boltons untuned except it's got a smoother, lower VTEC engagement and of course a lot more revs. It definitely does not have the torque of a tuned AP2 which can gain a lot due to the added displacement.
Nice Numbers BTW!
Wow thats crazy how 1 tune has 228 hp vs 206 with similar mods ?!?!?
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Joined: Oct 2005
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From: Denton, TX