K series specs: Reference for Swaps

[joe7987]

K-Series Specs

Well, I figured this would be some good reference material for all of you K-Series swappers. This should also help you to decide which engine you'd like to swap in. If you have anything to add, post away and I'll append as necessary. Feel free to help me fill in the question marks.

Special thanks to ojay for helping out with this.

K20A3
7th gen Honda Civic Si / base model Acura RSX
2.0 L DOHC
6800 RPM Redline
160 hp / 132 lb - ft tq
9.8:1 compression

K20A2
Acura RSX-S
2.0 L DOHC
???? RPM Redline
200 hp / 142 lb - ft tq
11:1 compression

K20A
Honda Integra Type R
2.0 L DOHC
???? RPM Redline
220 hp / 150 lb - ft tq
11.5:1 compression

K24A1
Honda CR-V
2.4 L DOHC
???? RPM Redline
160 hp / 162 lb - ft tq
9.6:1 compression

K24A2
Acura TSX
2.4 L DOHC
7100 RPM Redline
200 hp / 166 lb - ft tq
10.5:1 compression

K24A4
Honda Accord / Honda Element
2.4 L DOHC
???? RPM Redline
160 hp / 161 lb - ft tq
9.7:1 compression

K20Z1
2005 RSX - S
2.0 L DOHC
7800 RPM Redline
210 hp / 143 lb - ft tq
??:1 compression

K20Z3
8th Gen Civic Si (FG2)
2.0 L DOHC
8000 RPM Redline
197 hp / 139 lb - ft tq
11.0:1 compression


Head Info

A4 head
2 cams lobes on the intake
1 cam lobe on the exhaust
EGR Porting

A2 head
3 cam lobes on intake and exhaust cams
EGR Porting

A1 head
2 cam lobes on intake
1 cam lobe on exhaust.

 

[ojay]

copied this over from Cambo on 7thgencivic.com:

K24 Engine Locations and Names:
1. Accord K24A4
2. TSX K24A2
3. Element K24A4
4. CRV K24A1

The Heads:
1. The A4 head: 2 cams lobes on the intake, 1 on the exhaust. EGR Portng
2. The A2 head: 3 cam lobes on intake and exhaust cams. EGR Porting
3. The A1 head: 2 cam lobes on intake, 1 on exhaust.

Compression Ratios:
K24A4: 9.7:1
K24A2: 10.5:1
K24A1: 9.6:1

Horsepower and Torque Ratings:
K24A4: 160 hp and 161 ft. lbs tq
K24A2: 200 hp and 166 ft. lbs tq
K24A1: 160 hp and 162 ft. lbs tq

 

[ojay]

also from Jpax on ephatch.com:

K20A - EURO spec

• 147 kW (200 hp) @7400 rpm
• Torque 196 Nm @5900 rpm
• Redline 8100 RPMS

• Bore 87mm
• Stroke 86mm
• Comp Ratio 11,0:1
• Displacement 1998 cm3
• Specific output 100HP

and of course, K20Z1, 2005 RSX-S.

 

[joe7987]

updated. Thanks ojay. I made sure to mention you at the top.

 

[Matt.]

For all the n00b's, K20A3 would be best for turbo applications. Where as K20A and K20A2 is best for all motor set ups.

Although, with the K20A3, you can use A and A2 parts to get up to par with K20A2's... but compression is one thing you need to watch out for.

 

[ikillradio]

dude i want specs on the 05 rsx s hehe

 

[joe7987]

updated with some specs for the 05 type s =oP

 

[got_sake?]

just out of curiostiy, how much does a K20A3 normally go for? I'm still thinking over my options....because it's going to be a good while before any of my asperations can be financially in reach. So I'm spending the meantime weighing my options and going back and forth on what i wanna do.

Joe another good thing to add to your spec sheet would be that list of misc. parts needed for the swap and maybe some info on a 5 lug conversion.

 

[Matt.]

yea... 5 lug conversion is pretty much needed.. Unless you want 5 lug in front and 4 lug in back.

EDIT: Actually... now that I think of it.. you can get Si axles that have 4-lug hubs and use them.

 

[Revolver]

The K20A torque is a little too high...

 

[cgpEJ6]

yea... 5 lug conversion is pretty much needed.. Unless you want 5 lug in front and 4 lug in back.

that would be interesting to see

 

[joe7987]

list of needed parts for K swap is now listed as a sticky in the 7th gen tech forum.

 

[Pineapples]

The K20A torque is a little too high...

Is that bad?

 

[got_sake?]

The K20A torque is a little too high...

torque is a good thing......

Thanks Joe!

 

[Pineapples]

For all the n00b's, K20A3 would be best for turbo applications. Where as K20A and K20A2 is best for all motor set ups.

But turbo can only push your engine so far. 160hp engine with turbo probably can't beat 220hp engine without turbo... can it?

 

[joe7987]

For all the n00b's, K20A3 would be best for turbo applications. Where as K20A and K20A2 is best for all motor set ups.

But turbo can only push your engine so far. 160hp engine with turbo probably can't beat 220hp engine without turbo... can it?

It's safer to boost the low compression engine as opposed to the high compression engine. The A2 is boostable... but I'd recommend low compression pistons

 

[joe7987]

Is that bad?

He was pointing out an error I made. Which has been fixed now.

 

[joe7987]

torque is a good thing......

Thanks Joe!

no problem at all. Lemme know if there's anything else I can do.

 

[got_sake?]

For all the n00b's, K20A3 would be best for turbo applications. Where as K20A and K20A2 is best for all motor set ups.

But turbo can only push your engine so far. 160hp engine with turbo probably can't beat 220hp engine without turbo... can it?

K20A3 greddy intercooled kit pumps out around 250hp to the wheels..... so yeah it can

 

[got_sake?]

He was pointing out an error I made. Which has been fixed now.

i too suffered from premature flaming....... mah bad. sorry dude.