i know about swapping engines but there was something that was bothering me. at hmotorsonline.com they're showing a K20A (RSX Type R) Motor with 220hp and 158tq. but they have a k20a2 usdm (which i thought had a higher hp output) turns out to be 201hp and 140tq. now do these numbers add up? or did i stumble across something? anyhelp is great i just wanted to figure this one out.

 

Well, if you're asking if they are correct, then yes, they are. The K20A will pump out 220whp (11.5:1 compression) and the K20A2 will churn out 200whp (11.0:1 compression).

 

i think the z1 is 210hp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toyomatt84 &raquo;</TD></TR><TR><TD CLASS="quote">Well, if you're asking if they are correct, then yes, they are. The K20A will pump out 220whp (11.5:1 compression) and the K20A2 will churn out 200whp (11.0:1 compression).</TD></TR></TABLE>

those are flywheel horsepower numbers. neither engine puts that much to the wheels.

 

There are MANY different variations of the K20A motors so be careful. The hp ranges from 160-220whp. The K20A that most are familiar with and most swap is the K20A that comes from the integra type R. This engine has 220 bhp, LSD, and the red valve cover. It makes more hp (and always has) than the K20a2 USDM motor that is from the RSX type S. The reason for this is the different cams and compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dasilva &raquo;</TD></TR><TR><TD CLASS="quote">...they're showing a K20A (RSX Type R) Motor with 220hp and 158tq. but they have a k20a2 usdm (which i thought had a higher hp output) turns out to be 201hp and 140tq. now do these numbers add up?</TD></TR></TABLE>

I am not sure what you mean when you ask how they add up.

The K20A2 motor has a little less hp than the K20Z1 motor. They are both USDM RSX Type S motors, the Z1 being the motor that is used in the 2005 and 2006 USDM Type S.

I think that it's possible that the page you were looking at incorrectly lists the new SAE rating of the late model USDM motors instead of the proper HP rating of the K20A2 motors.

There are a number of minor internal changes that give the 2005/2006 USDM motor a little more power, but the biggest change is in the computer. The tuning is great, and it's a very nice motor.

The K20A(*) motor out of the DC5 Integra Type R does have 220 net HP out of the box.

All of the K20 motors respond very well to tuning with the Hondata K Pro.

For example, a 220 HP K20A(*) Type R motor that's attached to a K Pro will still return about 220 HP <u>wheel</u> HP after tuning with a K Pro, and this means a bone stock motor with just the usual changes to fuel pressure, fuel and spark map, and even hooked up with a very cheap header.

220 HP wheel HP would be about the same as about 255 SAE net HP.

This is without any internal changes at all, and this is why K motors are so popular in high performance, small Honda applications. It's about 25 HP more than what you could reasonably expect out of doing the same thing with a B18C5.

Now all you'd have to do is learn how to drive.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FR3SHT0D3F &raquo;</TD></TR><TR><TD CLASS="quote">those are flywheel horsepower numbers. neither engine puts that much to the wheels.</TD></TR></TABLE>

Sorry, read it off of K-series.com. Didn't see anything pointing to whether it was at the wheel or not.