okay, im just wondering about 2002+ civic EXs. my mom has an 02 civic EX(auto), and ive driven it like a dozen times. ive wound out 1st and second gear a few times, and i cannot feel or hear any vtec engagement at all. i know this is a noob/stupid question, but are all d17 vtecs like this? i know sohc vtecs only have variable timing on exhaust valves. ive ridden in/driven many vtecs; b16as, b16b, h22, d16s etc., and when vtec engages not only does it sound like a completely different car, but you can feel the increase in torque/hp.

 

Transition is too slight to notice, but there is.

 

ders different vtec in the newer motors rite that engages at 2300??

 

are you being sarcastic?

 

correction: SOHC vtecs only have variable timing on the INTAKE valves. that's why you can't hear a difference. on DOHC vtec motors, there's an audible change when the exhaust valves start opening more. you should never "feel" vtec engaging - the power band should be smooth with no stark increases in power. but it's kinda tricky on the mind when you suddenly hear those exhuast valves slam open, your mind makes your body think it just got slammed back in its seat. you don't get that with SOHC vtec.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by benb18a &raquo;</TD></TR><TR><TD CLASS="quote"> are all d17 vtecs like this? .</TD></TR></TABLE>

Yes, you need B18C5 yo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by steronz &raquo;</TD></TR><TR><TD CLASS="quote">correction: SOHC vtecs only have variable timing on the INTAKE valves. that's why you can't hear a difference. on DOHC vtec motors, there's an audible change when the exhaust valves start opening more. you should never "feel" vtec engaging - the power band should be smooth with no stark increases in power. but it's kinda tricky on the mind when you suddenly hear those exhuast valves slam open, your mind makes your body think it just got slammed back in its seat. you don't get that with SOHC vtec.</TD></TR></TABLE>

i agree with the "never feel vtec engaging" part for the 1.6 vtecs, but not the h22. you can feel the change in the h22 when it engages.

 

you shouldn't with proper tuning. most honda engines don't have completely flat torque curves like V8s, so you can expect torque to increase a bit above the vtec engagement point, but it shouldn't be a "jump." it should be gradual. with my b16, i feel the car start pulling real hard about 7000 rpms, but the vtec engages at 6500... the jump is due to the cams working most effeciently around 7000, not due to the switch-over.

 

feeling da vtec in a d17? ****.. dream on brother...I can't even get enough feeling on my DOHC K20A3.. difinitely a bit more power than non vtec version tho., the D17, I raced my friends EX when I had my LX (both 2003), he took me when his vtec started kicking in, so its there, but you hardly ever feel it (stock)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NiPBoi &raquo;</TD></TR><TR><TD CLASS="quote">ders different vtec in the newer motors rite that engages at 2300??</TD></TR></TABLE>

that's the SI, not the d17's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by single_cam_ham &raquo;</TD></TR><TR><TD CLASS="quote">

that's the SI, not the d17's</TD></TR></TABLE>
yea i knoe just figured that they used the same kinda vtec on the sohc cuz the si it only engages on the intake side like the sohc

 

Put a Crower stage 3 cam in there for her, then youll feel it. Plus, your mother will always remeber her loving son when she sitting in traffic.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by generation7 &raquo;</TD></TR><TR><TD CLASS="quote">Put a Crower stage 3 cam in there for her, then youll feel it. Plus, your mother will always remeber her loving son when she sitting in traffic.</TD></TR></TABLE>

roflcopter!!!11!!!1!11one! i actually suggested that she should buy a turbo kit when she was bitching about how slow it is

 

When I had my Civic Ex I couldn't feel vtec or hear it until I put an intake on. Even then you had to listen for the change most of the time. With my Type-S you can hear it stock.

 

vtec in a d17a2 kicks in as soon as you hit wot. or 3300 rpm, whichever happens first. The engine tends to pull a bit harder at 4500 rpm but that is not vtec. All the vtec does is open an intake valve all the way instead of half way when it is not engaged

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EP3tune2RULE &raquo;</TD></TR><TR><TD CLASS="quote">feeling da vtec in a d17? ****.. dream on brother...I can't even get enough feeling on my DOHC K20A3.. difinitely a bit more power than non vtec version tho., the D17, I raced my friends EX when I had my LX (both 2003), he took me when his vtec started kicking in, so its there, but you hardly ever feel it (stock)</TD></TR></TABLE>

y0 clown what is you smokin puff puff give. not that you make it clear but the Ex's D17 Has real VTEC on the intake valves, unlike that of the K20A3. the K20A3 has a VTEC-E system and goes from a 12 valve operation to a 16 valve operation at 2200 or 2300 RPMs. you will never feel a VTEC kick with an A3. no matter waht you do to it, unless you swap an A2 or Z1 head on.