hello. i need your guys help on something. i want to do a k swap on my civic but im not sure what to choose. i was thinking the rsx k20a2 or a k24 from accord or TL. if i get the k20a2 ill have the package, but idk what k24 would be good and what transmission i would have to get. so i just want to know if either one will be more expensive than the other and if i will have trouble passing smog with either of them. any suggestions, ideas will all be appreciated. thanks

 

I would suggest you choose the K20a2, Quick & Easy(maybe) installation, favorable results. People always say that the K24 oil pan will dip low if your car is dropped at a certain height...its more on what you prefer. "GO FAST OR GO HOME"!

 

I don't know anyone who says the K24 oil pan sits low. I've got a K24, and it sits no lower than the RSX subframe needed to complete the swap.

 

The TL's never came in K24's. I think you are mistaken them for the TSX.

I would suggest you go for a K20/24 frank with a K20Z1 transmission.

 

toyomatt, what k24 are you running? and transmission? does that setup cost more than the k20a and more work to do?
20-em2-05, my mistake. yes the tsx, seems like it has way more power than the other k24s

 

My setup cost way more than a standard K20 swap. The work required is definitely more than the 2 liter, due to the wiring and mount differences. It's an '06 K24A2 with an '03 K20A2 transmission.

 

personally would you recommend that set up? i was looking into the tsx with the rsx-s trany, but which one will produce more power, i do plan on doing internals, forged pistons, valves, rods, etc.

 

I would recommend doing some research on the different engines, because it sounds like you don't really know much about them. Figure out what you want out of your car, and for what reasons you want to swap the drivetrain out. Then your answer will be found. What works for me, will probably not work for you, since you have different tastes and goals.

 

Hey matt. What are the pros and cons about a K24 vs. a K20 swap? i think that might help him out a bit more... I havent seen too much info on a K24 swap when I look for it, because most people usually do a K20. If possible, then perhaps you can point him in the direction where he can find the info that he needs?

 

https://honda-tech.com/forums/honda-civic-2001-2005-78/diy-k20-k24-swap-into-2001-2005-civic-1628002/ <--- From the FAQ's.

It's pretty much that both has their pros and cons.

K24A# lacks the top end power and the short gear ratios that the K20A# makes.

K20A/# lacks the torque that the K24A# makes.

That's why for the best of 2 worlds, you get a K20A head/Transmission and mate it with a K24A block. I'm sure the block can handle 8K RPM safely.

 

Exactly what I am gonna do. K-hybrid. Not gonna be easy at all though. And definitely not cheap.

 

I'm not going to sit and go through the intricacies of the different engines, as it would take a long time... and I'd rather not. There's plenty of information out there on various sites to help one decide on what's best for their application. All it takes is a little bit of research.


That's not entirely true.

The K24A2's don't lack much in "top end power", when compared to the K20A's. They definitely have more bottom end and mid range torque, though. The K20A itself, has the highest redline from factory. The standard redline for a K24A2 is 7,600 RPM's. I've seen built K24's go beyond 9,000 RPM's without much work.

I wouldn't bother putting a K20A2 head on a K24A2 block, as the minuscule gains in the higher RPM range is completely overshadowed by the losses of low and midrange power. But, that's me.

 

Whats the highest that you've seen a k20 redline at? Just curious.. And the K24?

What can one do to raise the rev limit on a K24?

 

Start by looking at k20a.org and clubrsx.com.

 

Cool. Thanks dude.

 

thanks guys. i made up my mind and im going with the k24a2 engine, its going to take a bit more work but i have a good mechanic on my side. i got the engine already, i just need the transmission now. as soon as i start ill post up my progress.