i got a 02 honda civic ex and im thinkin of swapin a 2.0 si engine . i wanna know how much you think theyll run me ?will it make a differance ?

 

i suggest you just turbo it since you obviously don't know much about the engines and judging from this, I don't think you'll want to do a costly swap either.

 

k20 swaps are expensive. if you did do this, i would try to get a rsx type s engine instead.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Paulnsx &raquo;</TD></TR><TR><TD CLASS="quote">k20 swaps are expensive. if you did do this, i would try to get a rsx type s engine instead.</TD></TR></TABLE>

might as well get the Type S motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kal &raquo;</TD></TR><TR><TD CLASS="quote">i suggest you just turbo it since you obviously don't know much about the engines and judging from this, I don't think you'll want to do a costly swap either.</TD></TR></TABLE>

you say he doesnt know about the engines yet you tell him to turbo the car........

 

the k20a3's have been going for pretty cheap...some even under 2k...just look around...but if your gonna swap i think for alittle more you should just get the k20a2(type s motor)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy28 &raquo;</TD></TR><TR><TD CLASS="quote">i got a 02 honda civic ex and im thinkin of swapin a 2.0 si engine . i wanna know how much you think theyll run me ?will it make a differance ?</TD></TR></TABLE>

Too much...

 

well ... i think the best choice is to get a k20a3 si engine and turbo that ... k20a2 has too high of a compression

 

k20a3 is crap, don't waste your money. If you wanna make decent power get a k20a2 or k20a.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LiLxKeNnY &raquo;</TD></TR><TR><TD CLASS="quote">well ... i think the best choice is to get a k20a3 si engine and turbo that ... k20a2 has too high of a compression</TD></TR></TABLE>

Exactly. A K20A3 with turbo will destroy any K20A2 or K20A. Go for the A3 swap and then down the road you can do the JRSC or turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jimmyjames &raquo;</TD></TR><TR><TD CLASS="quote">
Exactly. A K20A3 with turbo will destroy any K20A2 or K20A. Go for the A3 swap and then down the road you can do the JRSC or turbo.</TD></TR></TABLE>

Can you point us to any dyno figures in support of this?

Your opinion is that it's more economical and more productive to turbocharge a K20A3 than to pay, say, $5400 for a K20 220HP ITR motor including LSD and six speed?

Not being contentious...honestly curious.

What turbo systems are the most popular and best for the K20A3?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy28 &raquo;</TD></TR><TR><TD CLASS="quote">i got a 02 honda civic ex and im thinkin of swapin a 2.0 si engine . i wanna know how much you think theyll run me ?</TD></TR></TABLE>

It's not going to cost as much as you think, if you get your money together and wait patiently for the right opportunity.

Among the EP3 owners, the purchase of a USDM Type S motor or a UKDM or JDM Type R motor is very popular. If you keep your eyes open for one of them selling the old K20A3 motor, you could probably pick it up much more cheaply than you'd think.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">will it make a differance ?</TD></TR></TABLE>

Moving from an SOHC EX motor, yes, it will make a huge difference. 40 horsepower, and factory reliability. Additionally, the K motors are very torquey and a pleasure to drive.

 

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

Can you point us to any dyno figures in support of this?

Your opinion is that it's more economical and more productive to turbocharge a K20A3 than to pay, say, $5400 for a K20 220HP ITR motor including LSD and six speed?

Not being contentious...honestly curious.

What turbo systems are the most popular and best for the K20A3?</TD></TR></TABLE>

There are plenty of dynos out there. Here are a few after some quick searching:

A JRSC at 6psi will dyno higher than a K20A. About 205-210HP and 165ft lbs.

A K20A3 with an A2 head and K-Pro will dyno about 200HP and 160ft lbs.

Greddy turbo at the stock 6.5psi makes about 205-210HP and 195ft lbs.

Cybernation turbo on an A3 at 7.5 psi makes 265HP and 215ft lbs.

A K20A dynos around 195HP and 145ft lbs. The K20A2 is below that.

 

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

Can you point us to any dyno figures in support of this?

Not being contentious...honestly curious.
</TD></TR></TABLE>

I'm not advocating one route over the other, but I believe he's talking about cybernation's k20a3 kits.

http://www.cybernationmotorspo...o.jpg
279/228 @ 10psi

http://www.cybernationmotorspo...i.jpg
262/209 @ 7psi

Going turbo is more cost effective than swapping in a k20a or k20a2. I believe Cybernation promises 270/215 @ 9psi for $3700. No 6-spd tranny, but when you're making 100hp and 85lb-ft more than a k20a2, I don't think it matters.

 

Please read my post above yours.

 

Interesting information. I've never been a big supporter of turbos, but this seems compelling.

 

My Greddy kit dyno chart.
231.1whp/208.5tq @ 6.5 psi.
It made 260whp/224tq @ 8psi


Let me add that its very fun to drive on the track

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg_nezay &raquo;</TD></TR><TR><TD CLASS="quote">Let me add that its very fun to drive on the track
</TD></TR></TABLE>

When you say track, do you mean a road course? Just wondering about boost coming on at weird moments.

In case you didn't notice, I don't know a lot about turbos.

 

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

When you say track, do you mean a road course? Just wondering about boost coming on at weird moments.

In case you didn't notice, I don't know a lot about turbos.
</TD></TR></TABLE>

Look at those dynos. There isn't a lot of spiking going on anywhere. That HP graph looks smoother than stock.

 

i just have to ask, wouldn't a k20 (type s) on boost kill any k20 (ep3) on boost? if you are gonna compare the two motors. i think it would be fair to compare them at the same level.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esponet &raquo;</TD></TR><TR><TD CLASS="quote">i just have to ask, wouldn't a k20 (type s) on boost kill any k20 (ep3) on boost? if you are gonna compare the two motors. i think it would be fair to compare them at the same level.</TD></TR></TABLE>

The difference lies in the compression ratios. The K20A3 has a lower compression ratio, therefore you are able to push more boost. Yes, the type s engine has more HP stock and a different type setup VTEC, but when running boost, you are not able to push as much boost without detonation.

Now when you argue a Type S engine running less boost when put up against a K20A3 (Si) running more boost. I would THINK (just think, because I don't know) that the K20A3 engine would be able to push out more whp. I don't know that, it is just my guesstimation. What does everyone else think? Post Dyno's!!

 

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

The difference lies in the compression ratios. The K20A3 has a lower compression ratio, therefore you are able to push more boost. Yes, the type s engine has more HP stock and a different type setup VTEC, but when running boost, you are not able to push as much boost without detonation.

Now when you argue a Type S engine running less boost when put up against a K20A3 (Si) running more boost. I would THINK (just think, because I don't know) that the K20A3 engine would be able to push out more whp. I don't know that, it is just my guesstimation. What does everyone else think? Post Dyno's!!</TD></TR></TABLE>

Exactly. The OP was also concerned about cost. If someone can make an argument how a K20A2 swap + turbo is less expensive than a K20A3 swap + turbo, I'd REALLY like to hear it.

 

i admit, i'm still new with the k20, but it seems like the type s swap would be a more wise decission. a simple head gasket swap should take care of the comp. and don't forget about 6spd vs. 5spd. if the OP is concerned about cost, i think he should swap in a type s then upgrade later on, as hegets more money.

btw, a jdm k20 R motor swap runs about $5500. i think it would cost about the same if not more for a k20(ep3) in a junk yard. labor would cost the same between the two motors.

 

you guys got to stop that bickering lol. k20 a and a2 motor are not safe the boost hands down on that. but if you gonna boost a a3 its the best thing and would be faster then a stock a or a2. the only ups about the a and a2 is the more internal work you can do to the motor toda n what not and on the a3 you are limited because of the non true vtec power. but swaping the head of a3 to a a2 or a its pretty much the same but still low on compression. meaning boost all you want n also you could put the same internals as the a and a2 motors. hands down you deciede whats best for your pocket.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esponet &raquo;</TD></TR><TR><TD CLASS="quote">i admit, i'm still new with the k20, but it seems like the type s swap would be a more wise decission. a simple head gasket swap should take care of the comp. and don't forget about 6spd vs. 5spd.</TD></TR></TABLE>

dont forget that the gears on a a3 motor are shorter better for N/A applications like how people with b18 motor n tranny swap to a b16 or b20 because the gears are shorter. the a2 tranny is more longer making it better for boosted applications. know what im saying.