so my friend has a 03 si and wants ivtec to angage and perform like b series vtec what i mean by that is actually hear it engage aswell..

what mods will have to be done? kpro? header? exhaust? all he has is a aem short ram...

thanks

 

head swap or engine swap

 

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

bingo!

 

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

bingo!</TD></TR></TABLE>


AH crap really? will a type-s head or R bolt right up? what else will be needed?

thanks again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by luvmyEGG &raquo;</TD></TR><TR><TD CLASS="quote">AH crap really? will a type-s head or R bolt right up? what else will be needed?

thanks again</TD></TR></TABLE>

Try searching. It's everywhere.

But for the money, it's said to be more worth doing a motor swap.

Or just boost the sucker

 

oh ok thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by luvmyEGG &raquo;</TD></TR><TR><TD CLASS="quote">so my friend has a 03 si and wants ivtec to angage and perform like b series vtec what i mean by that is actually hear it engage aswell..

what mods will have to be done? kpro? header? exhaust? all he has is a aem short ram...

thanks</TD></TR></TABLE>
Ok why not explain why its not possible instead of flamming this guy....He obviously is oblivious to the fact that the A3 has the gay ivtec

The A3 has a vtec system designed with fuel economy in mind....Under 2200 RPM the engine operates with 3 valve per cylinder...After that the vtec engages and opens all 4 valves...this is why u cannot have "real" vtec with the A3 stock...with a typeS (k20A2) head or the A head (typeR) you have "real" vtec where there is a high and low cam lobe on both intake and exhuast...like the B series with vtec...think of the a3 as an LS motor its torquey and has some power but without an engine swap the civic and rsx base both have shitty motors..the crank wont support RPM over 7200 anyways so not really worth a head swap to use the cams that are in the head u need to rev it out...and the A3 crank cannot handle that for a long time it will break eventually leaving u assed out...

Moral of the story swap is the real way to get real vtec SAFELY


Modified by JdMK20Ahatch at 9:01 PM 10/15/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JdMK20Ahatch &raquo;</TD></TR><TR><TD CLASS="quote">
Ok why not explain why its not possible instead of flamming this guy....He obviously is oblivious to the fact that the A3 has the gay ivtec

The A3 has a vtec system designed with fuel economy in mind....Under 3200 RPM the engine operates with 3 valve per cylinder...After that the vtec engages and opens all 4 valves...this is why u cannot have "real" vtec with the A3 stock...with a typeS (k20A2) head or the A head (typeR) you have "real" vtec where there is a high and low cam lobe on both intake and exhuast...like the B series with vtec...think of the a3 as an LS motor its torquey and has some power but without an engine swap the civic and rsx base both have shitty motors..the crank wont support RPM over 7200 anyways so not really worth a head swap to use the cams that are in the head u need to rev it out...and the A3 crank cannot handle that for a long time it will break eventually leaving u assed out...

Moral of the story swap is the real way to get real vtec SAFELY</TD></TR></TABLE>

you dah man

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JdMK20Ahatch &raquo;</TD></TR><TR><TD CLASS="quote">
Ok why not explain why its not possible instead of flamming this guy....He obviously is oblivious to the fact that the A3 has the gay ivtec

The A3 has a vtec system designed with fuel economy in mind....Under 3200 RPM the engine operates with 3 valve per cylinder...After that the vtec engages and opens all 4 valves...this is why u cannot have "real" vtec with the A3 stock...with a typeS (k20A2) head or the A head (typeR) you have "real" vtec where there is a high and low cam lobe on both intake and exhuast...like the B series with vtec...think of the a3 as an LS motor its torquey and has some power but without an engine swap the civic and rsx base both have shitty motors..the crank wont support RPM over 7200 anyways so not really worth a head swap to use the cams that are in the head u need to rev it out...and the A3 crank cannot handle that for a long time it will break eventually leaving u assed out...

Moral of the story swap is the real way to get real vtec SAFELY</TD></TR></TABLE>

good stuff and very well put

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JdMK20Ahatch &raquo;</TD></TR><TR><TD CLASS="quote">
Ok why not explain why its not possible instead of flamming this guy....He obviously is oblivious to the fact that the A3 has the gay ivtec

The A3 has a vtec system designed with fuel economy in mind....Under 3200 RPM the engine operates with 3 valve per cylinder...After that the vtec engages and opens all 4 valves...this is why u cannot have "real" vtec with the A3 stock...with a typeS (k20A2) head or the A head (typeR) you have "real" vtec where there is a high and low cam lobe on both intake and exhuast...like the B series with vtec...think of the a3 as an LS motor its torquey and has some power but without an engine swap the civic and rsx base both have shitty motors..the crank wont support RPM over 7200 anyways so not really worth a head swap to use the cams that are in the head u need to rev it out...and the A3 crank cannot handle that for a long time it will break eventually leaving u assed out...

Moral of the story swap is the real way to get real vtec SAFELY</TD></TR></TABLE>

Ohhh ok thank you very much ill pass the info to my friend

 

The low compression K20A3 USDM motor responds very well to boost. If your friend is after more performance, say 50 HP or so, then there are some very well proved setups available that are not too expensive.

One of the moderators here (B18CXr) has a shop in Carolina and he knows quite a bit about what you can and cannot do with K motors.

I hasten to add that the K20A(*) and K20A2 motors still do not have the same kind of VTEC push that people will remember from the B motors in the DC2 ITR and GS-R.

They just don't need to do it that way anymore, and we're better off for it! The power's available more across a wide power band now.

To be honest, having owned an EP3 USDM Si, I have to say that I was surprised at how well the iVTEC works in the K20A3, and I always appreciated having torque at low RPM.

 

kool hes thinking about boost now anyway thanx again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by George Knighton &raquo;</TD></TR><TR><TD CLASS="quote">The low compression K20A3 USDM motor responds very well to boost.

I have to say that I was surprised at how well the iVTEC works in the K20A3, and I always appreciated having torque at low RPM. </TD></TR></TABLE>


much agreed! That's why I'm boosting my k20a3. And the torque is very noticeable, especially on the highway in 5th gear, just give is gas at about 3500 rpms and it takes off pretty good. But thats where a dual ball bearing turbo comes into play

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JdMK20Ahatch &raquo;</TD></TR><TR><TD CLASS="quote">Under 3200 RPM the engine operates with 3 valve per cylinder.</TD></TR></TABLE>

I swear it was 2200 or 2300 rpms. Doesn't one intake valve open slighty to prevent fuel from pooling behind the valve while the other opens at full lift and duration under that RPM?

 

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

I swear it was 2200 or 2300 rpms. Doesn't one intake valve open slighty to prevent fuel from pooling behind the valve while the other opens at full lift and duration under that RPM?</TD></TR></TABLE>


it is 2200

 

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

I swear it was 2200 or 2300 rpms. Doesn't one intake valve open slighty to prevent fuel from pooling behind the valve while the other opens at full lift and duration under that RPM?</TD></TR></TABLE>yeh pressed the key wrong and dont proof read my post good catch will edit