K20A ITR
K20A2 RSX Type S
K20A3 RSX Base
K20A3 Civic Si


Apart from HP/torque what are the differences between this blocks/trannies?

Is a K20A3 from an Si a direct bolt into a RSX?

What about the RSX-S engine and the JDM K20A ? Do they use the same mounts?

Please share whatever you know about this matter,

thanks,

Nikos

PLease share with me any differences in size and other accesories you have seen between the different K series blocks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nikos &raquo;</TD></TR><TR><TD CLASS="quote">K20A ITR
K20A2 RSX Type S
K20A3 RSX Base
K20A3 Civic Si


Apart from HP/torque what are the differences between this blocks/trannies?

Is a K20A3 from an Si a direct bolt into a RSX?

What about the RSX-S engine and the JDM K20A ? Do they use the same mounts?

Please share whatever you know about this matter,

thanks,

Nikos

PLease share with me any differences in size and other accesories you have seen between the different K series blocks.</TD></TR></TABLE>

k20's are like b series, and they will bolt into any 2001+ civic/rsx with little trouble.

k20a3 is obviously 5 speed. only k20a is LSD

k20a3 only has i-vtec on the intake cam

k20a2 has i-vtec on intake/exhaust just like the k20a ( i believe )

they are all mostly the same except for cam lift/duration and compression.

and im not sure which motor, or if all motors have a GSR type IM.

they have dual runners for fuel economy. if someone could verify my info that would be great, im a little rusty on the k20 buisness.

 

I find it funny everyone thinks that the JDM K20A for the DC5R is 220HP. It's 220KW... which translates into 217BHP.

 

wait, lets think about what your saying, K20a2 goes in CTR, ctr has 200kw correct?

k20a2 goes in US type S as 200 HP and also goes in AUSDM ITR 200 hp

 

K20a2 in my CTR has got 147 KW, which means 200 german HP or 197 BHP. Obviously the british horses are a little bit stronger.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JUN EK9 &raquo;</TD></TR><TR><TD CLASS="quote">and im not sure which motor, or if all motors have a GSR type IM.
</TD></TR></TABLE>

Base RSX K20A3 has this IM. The Si K20A3 has the Type S manifold on it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nikos &raquo;</TD></TR><TR><TD CLASS="quote">
What about the RSX-S engine and the JDM K20A ? Do they use the same mounts?
</TD></TR></TABLE>

The Si and RSX-s share the same mounts, so i would assume the JDM ITR would also.

 

k20a has a lighter flywheel and longer duration on the cams. the intake manifold is also has larger runners and higher compression pistons. and a higher final drive ratio.

 

They all share the same mounts?

 

What about the K24 in the TSX (200hp)?!? How is it similar to the K20A2 and/or different from the standard K24 (160hp) found in the accord, CR-V, etc. I know the gearbox is a 6 speed with a magnesium case, but not sure if it's double i-VTEC or single, cam specs?, CR, etc.

Seems to me that might be the hot setup for swaps at least from a torque perspective.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nikos &raquo;</TD></TR><TR><TD CLASS="quote">They all share the same mounts?</TD></TR></TABLE>

Here's a pic of the Si's mounts from http://www.hondaautomotiveparts.com



And here's one of the Type-s from http://www.acuraautomotiveparts.org

 

Don't mean to change the topic but what are some combos people are doing? like head swaps, cam swaps, pistons etc. between the k series engines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Si &raquo;</TD></TR><TR><TD CLASS="quote">Don't mean to change the topic but what are some combos people are doing? like head swaps, cam swaps, pistons etc. between the k series engines. </TD></TR></TABLE>

A couple guys on here have K24 blocks from the CRX mated to either the K20A3
head or the K20A2 head.
There's one guy on ephatch.com (I think) that swapped out the stock 5spd. for the
RSX-S 6spd. tranny.
Then of course there is the K20A/K20A2 swaps in to the Si.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by typer_801 &raquo;</TD></TR><TR><TD CLASS="quote">What about the K24 in the TSX (200hp)?!? How is it similar to the K20A2 and/or different from the standard K24 (160hp) found in the accord, CR-V, etc. I know the gearbox is a 6 speed with a magnesium case, but not sure if it's double i-VTEC or single, cam specs?, CR, etc.

Seems to me that might be the hot setup for swaps at least from a torque perspective.</TD></TR></TABLE>

K24A2 in the TSX has VTEC on exhaust and intake cams, comp ratio is 10.5:1

 

More stuff i found searching the net.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SCC &raquo;</TD></TR><TR><TD CLASS="quote">Pumping out 200 hp at 7400 rpm and 142 lb-ft of torque at 6000 rpm, the engine from the RSX Type-S (K20A2) is actually quite similar to the K20A3 in the Civic Si. They share the same 2.0-liters of displacement, bore/stroke, block, head, valves, and intake manifold. However, a whole slew of internal guts and external bolt-on bits are radically different between the two.

For starters, the RSX's K20A2 boasts 11:1 compression pistons, dual valve springs, and a tri-y header with larger primaries than the Civic.

Perhaps most significantly, the K20A2 employs a more sophisticated i-VTEC system in conjunction with more aggressive cams. There's a lot of confusion of the differences between the two engines' i-VTEC systems, so here's the straight poop. On both cars, i-VTEC really consists of two features: VTC (Variable valve Timing Control) and VTEC (Valve Timing and lift Electronically Controlled). VTC, in both cases, is simply a hydraulically controlled adjustable cam sprocket that varies intake cam timing on the fly depending on engine speed and load. VTC does not affect the exhaust cam. It's the VTEC portion of these systems that differs. On the K20A2 (RSX Type-S), VTEC means there's a low-rpm set of cam lobes and a screaming, high-lift, long duration high-rpm set of cam lobes both carved into the same camshaft. At about 6000 rpm, the rocker arms stop following the wussy little low-rpm cams, and start following the big ones. This is the system that made VTEC synonymous with high-output, 8000-rpm monsters.

Unfortunately, the K20A3 (Civic Si) uses a completely different system that happens to share the VTEC name. At low engine speeds, the two intake valves operate with different cam lobes--one valve gets the "primary" lobe (33.925mm lobe height). The other valve gets a wimpier "secondary" lobe (29.638mm lobe height). When VTEC mode kicks in at 2300 rpm, both valves start following the primary lobe. That's it. No high-rpm kick, no screaming, no high output. In the meantime, the exhaust valves always get shoved open by a 34.092mm lobe with no tricks at all.

With the two engines sitting together on the floor, we picked up on some notable external differences between them as well. In addition to the different cylinder heads, the RSX has a cast aluminum oil pan (the Civic's is stamped steel) and a small oil cooler at the base of the oil filter.

The power steering systems are also different. The Si uses electric power steering, while the RSX's is hydraulic. Finally, the axles differ slightly. The RSX has a larger bearing to support the intermediate shaft, and uses larger splines at the hubs.
</TD></TR></TABLE>

 

good info, thanks!!!

 

You guys are forgetting about the K20A1 which has 215hp in the JDM EP3 CTR.
Here's the updated list:

K20A: ITR 220hp
K20A1: JDM CTR 215hp
K20A2: UK CTR and US RSX-S 200hp
K20A3: Si/SiR and RSX 160hp

They should ALL be swapable between each other as well as the transmissions. The major differences would be the Vtec on exhaust and intake as well as the weight of components, etc. I don't have all of the info.

Steve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nikos &raquo;</TD></TR><TR><TD CLASS="quote">what are the differences between this blocks?
</TD></TR></TABLE>

I want to know this too...

 

A bit more info with some pics: http://www.hondata.com/techk20general.html