whats the difference....
Honda-Tech Member
Joined: Jun 2002
Posts: 3,116
Likes: 2
Re: whats the difference.... (03Si)
For the most part the difference is in the intake manifolds, and the heads, where the RSX's iv-tec is tuned differently and affects exhaust as well as intake timings, while the civic is mainly focused in intake, low-end-torque and on ultra-low emissions at idle.
The ECUs are different, obviously, to handle these things.
The RSX-S also has a counter-weighted engine, while the CivicSi has a balanced engine, but the main blocks are virtually the same except for stronger internals in the RSX-s to handle those higer RPMs.
Other differences include the transmissions, and the Civic has electric power steering instead of traditional belt-driven, like the RSX has.
That's all I can think of right now...
The ECUs are different, obviously, to handle these things.
The RSX-S also has a counter-weighted engine, while the CivicSi has a balanced engine, but the main blocks are virtually the same except for stronger internals in the RSX-s to handle those higer RPMs.
Other differences include the transmissions, and the Civic has electric power steering instead of traditional belt-driven, like the RSX has.
That's all I can think of right now...
Joined: Apr 2002
Posts: 121
Likes: 0
From: Petaluma, CA, USA
Re: whats the difference.... (hatch2k)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hatch2k »</TD></TR><TR><TD CLASS="quote">For the most part the difference is in the intake manifolds, and the heads, where the RSX's iv-tec is tuned differently and affects exhaust as well as intake timings, while the civic is mainly focused in intake, low-end-torque and on ultra-low emissions at idle.
The ECUs are different, obviously, to handle these things.
The RSX-S also has a counter-weighted engine, while the CivicSi has a balanced engine, but the main blocks are virtually the same except for stronger internals in the RSX-s to handle those higer RPMs.
Other differences include the transmissions, and the Civic has electric power steering instead of traditional belt-driven, like the RSX has.
That's all I can think of right now...
</TD></TR></TABLE>
Alot of this post has good information but however the Type S (k20a2) and the Si motor (k20a3) DO share the same type of intake manifold. You were right about the different stages of i-vtec though. The k20a3 acts as a 12 valve motor until around 2500 then it kicks up to 16 valve and only has vtec on the intake side. The k20a2 (type S) however has vtec on intake and exhaust. TO put it another way we got ripped off!!!! hahaha
The ECUs are different, obviously, to handle these things.
The RSX-S also has a counter-weighted engine, while the CivicSi has a balanced engine, but the main blocks are virtually the same except for stronger internals in the RSX-s to handle those higer RPMs.
Other differences include the transmissions, and the Civic has electric power steering instead of traditional belt-driven, like the RSX has.
That's all I can think of right now...
</TD></TR></TABLE>Alot of this post has good information but however the Type S (k20a2) and the Si motor (k20a3) DO share the same type of intake manifold. You were right about the different stages of i-vtec though. The k20a3 acts as a 12 valve motor until around 2500 then it kicks up to 16 valve and only has vtec on the intake side. The k20a2 (type S) however has vtec on intake and exhaust. TO put it another way we got ripped off!!!! hahaha
Thread
Thread Starter
Forum
Replies
Last Post
xXxDelSoulxXx
Acura RSX DC5 & Honda Civic EP3
2
Jan 5, 2008 09:52 PM
newskoolhatch
Acura RSX DC5 & Honda Civic EP3
2
May 20, 2003 02:04 PM