Vtec in RSX
Im thinking about buying an RSX type S and i test drove one from a dealer tonight. Everything seemed alright but when i wound it up in 2nd gear, vtec kicked in with an increase in sound, but suprisingly there was no noticable power gain. I had an 01 prelude and when vtec kicked in at around the same RPM there was an unmistakable power increase as well as sound. Now, is this normal in the RSX type S or could there have been something wrong? What could that be?
the vtec in the K series doesnt crack as hard as the b series but there is a power gain trust me all you need to do is put an AEM cold air and you will feel the difference the k series responds well to any upgrades and you really shouldn't be hitting vtec if the car is still brand new wait till it has some miles and the engine is broken in
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redLUDEs2k1 »</TD></TR><TR><TD CLASS="quote">Im thinking about buying an RSX type S and i test drove one from a dealer tonight. Everything seemed alright but when i wound it up in 2nd gear, vtec kicked in with an increase in sound, but suprisingly there was no noticable power gain. I had an 01 prelude and when vtec kicked in at around the same RPM there was an unmistakable power increase as well as sound. Now, is this normal in the RSX type S or could there have been something wrong? What could that be?</TD></TR></TABLE>
Thats bc the B series is old technology man... With the b series motors, all the power and torque was in vtec, with the new K series motors, everything is far more improved and advanced (i-vtec)... Aside from better tuning/timing, the torque in the k series motors is far more linear or broad. This is why you dont feel a kick once "vtec" kicks in because most of the torque is already there which is actaully better because you get more power throughout the rpms... And you may not notice the vtec cross-over stock, but once you get a CAI, its very apparent! I just have intake and exhaust and when vtec kicks in, its very loud, you can defenitly hear the cross over. Hope this helps man
PS, K>B
Thats bc the B series is old technology man... With the b series motors, all the power and torque was in vtec, with the new K series motors, everything is far more improved and advanced (i-vtec)... Aside from better tuning/timing, the torque in the k series motors is far more linear or broad. This is why you dont feel a kick once "vtec" kicks in because most of the torque is already there which is actaully better because you get more power throughout the rpms... And you may not notice the vtec cross-over stock, but once you get a CAI, its very apparent! I just have intake and exhaust and when vtec kicks in, its very loud, you can defenitly hear the cross over. Hope this helps man
PS, K>B
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redLUDEs2k1 »</TD></TR><TR><TD CLASS="quote">I understand what your saying with the torque curve and such and im guessing i was just used to the prelude. Just to clarify the prelude is the h series engine.</TD></TR></TABLE>
Yes, I am aware, but the H and B series motors were developed around the same time... There V-tec is the same, you get most of the power up top in vtec. But you are right, I should have clarified
Yes, I am aware, but the H and B series motors were developed around the same time... There V-tec is the same, you get most of the power up top in vtec. But you are right, I should have clarified
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On my type-s i have a stock intake and test pipe w/ 2.5" exhaust
I can definately hear and feel vtec when it comes on at 6k especially after first gear. It really starts pulling
What i first noticed on the K motor was how high of an rpm when vtec kicks in, maybe you were looking for the vtec to kick at a lower rpm
I can definately hear and feel vtec when it comes on at 6k especially after first gear. It really starts pulling
What i first noticed on the K motor was how high of an rpm when vtec kicks in, maybe you were looking for the vtec to kick at a lower rpm
the rsx-s was used or new? If used, that could be the result of a slipping clutch. Happened to me.
But like theothers said, the i-vtec in the k-series is a smoother transition, you think its too timid now, wait till it gets a reflash, you just hear the difference it smooths it out so much.
But like theothers said, the i-vtec in the k-series is a smoother transition, you think its too timid now, wait till it gets a reflash, you just hear the difference it smooths it out so much.
ok, have any of you had your car on a dyno... if so did you get a chance to change your vtec point??? i'm guessing not... on a b.h.k you can put it way up and it will feel like vtec hits super hard and makes like 500,000 horsepower, but if it is tuned right you should barly notice a change in your (curve) so to speak....... just because it doesn't slam your head into your seat doesn't mean it it's not wurkin...get it?
If it is a used car and it already has mods on it they might have had the ECU re-flashed. The Hondata re-flash lowers v-tec and eliminates the "punch" that you are looking for. I know that I have a bine stock 03 type S with an AEM cold air and I can hear and feel when v-tec hits. The reflash also lowers it from 5800 to 5200.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nateg »</TD></TR><TR><TD CLASS="quote">ok, have any of you had your car on a dyno... if so did you get a chance to change your vtec point??? i'm guessing not... on a b.h.k you can put it way up and it will feel like vtec hits super hard and makes like 500,000 horsepower, but if it is tuned right you should barly notice a change in your (curve) so to speak....... just because it doesn't slam your head into your seat doesn't mean it it's not wurkin...get it?</TD></TR></TABLE>
hondata is all you need. the reflash will change your vtec point to 5200 rpm and your rev limit to 8600 rpm. Kpro is even better since you can basically tune and change just about anything on your car.
hondata is all you need. the reflash will change your vtec point to 5200 rpm and your rev limit to 8600 rpm. Kpro is even better since you can basically tune and change just about anything on your car.
ive got kpro with a short ram cat back and est pipe but with a stock header i dyno 210whp and 160 ftlbs of torque my vtec is at 4800 and my redline is at 8600 you can still feel and here the vtec but it doesnt feel as powerful because it has more power all throughout the rpm your not saying that the prelude was faster are you
That is because in the older B/H motors there is typically a significant drop in HP right before VTEC kicks. That's why in your prelude it would feel like a kick in the pants because essentaily your motor wasn't puting out to its full potentail until VTEC hit, whereas the newer K20 has a much, much smoother powerband so you won't feel the VTEC as much as you hear it. I think it might of been Car and Driver magazine (can't remember for sure) who named the K20 the "Best production 4 cylinder engine of all time". good stuff.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DA9 Purist »</TD></TR><TR><TD CLASS="quote">
That is because in the older B/H motors there is typically a significant drop in HP right before VTEC kicks. That's why in your prelude it would feel like a kick in the pants because essentaily your motor wasn't puting out to its full potentail until VTEC hit, whereas the newer K20 has a much, much smoother powerband so you won't feel the VTEC as much as you hear it. I think it might of been Car and Driver magazine (can't remember for sure) who named the K20 the "Best production 4 cylinder engine of all time". good stuff.</TD></TR></TABLE>
H-series still make more torque than most K-series
Other than that though, yeah, the i-VTEC has a more gradual transition, so you don't feel the kick.
That is because in the older B/H motors there is typically a significant drop in HP right before VTEC kicks. That's why in your prelude it would feel like a kick in the pants because essentaily your motor wasn't puting out to its full potentail until VTEC hit, whereas the newer K20 has a much, much smoother powerband so you won't feel the VTEC as much as you hear it. I think it might of been Car and Driver magazine (can't remember for sure) who named the K20 the "Best production 4 cylinder engine of all time". good stuff.</TD></TR></TABLE>
H-series still make more torque than most K-series

Other than that though, yeah, the i-VTEC has a more gradual transition, so you don't feel the kick.
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