How about this,any reason why I can't just use the stock accord engine harness with the k24a4 ecu(raa-a21) from a manual accord? Nothing will be hooked up to any tranny sensors.I understand I will get codes but just don't want a limp mode. I'll get a aem stand alone ecu or hondata k-pro when I get the extra cash.
not looking for anything but stock power out of a k24a4 for now.

 

I have never tried to do anything like this but I am worried that you will be in limp mode b/c of the Vehicle Speed Sensor will not be communicating stuff from the trans to the ECU. You will be pretty limited in the mixing and matching department when you try to use the stock ECU.

Maybe make it mid engine and you can run a K-series transmission?

 

I did some Searching on the vss, and see that the ecu will go into limp mode and keep the vtec from activating.glad I only paid 55 for the ecu, looks like it will be going back on ebay when I get it.I found this article http://www.hondatuningmagazine.com/tech/htup_1007_honda_accord_k24_engine_swap/viewall.html
I will be doing some more research.thank you

 

Yeah that's a good article. I get that magazine every month :up:

You need a universal conversion harness and it's not too complicated if you keep it organized. But you need a 02-04 RSX K20A2 (Type S 6-speed) or K20A3 (5-speed Base model) Engine Harness and a few of the K24 sensors and/or plugs spliced into the harness.

The ECU you have may be a good candidate for a Kpro install. You can go to hondata.com and cross reference the 3 letter code to check.

You will need to address the possibility of using that VW trans. You can try to contact Hondata and check. But I think you might be chasin a hassle. I say you Integrate a K series trans......plus shifting and axles.

 

If you can do coding you could always get an arduino or any simple microcontroller and write code to get the signal from your new transmission and convert it to a signal the original ECU wants.

 

The factory ECUs have immobilizers on them, so if you use them, you will need a bypass, or the key/ign from the car that the engine/ecu came from.

The pin-outs for the engine harness are different on the ECU side, so you want to get an engine harness that matches the ECU. No one uses the K24A4 ecu because it can not be modified. That is why everyone uses the K20A2 engine harnesses.

You need K-pro or AEM EMS to disable some of the sensors you will not be using.

Looks like a fun project. If I lived in SoCal or Vegas I would be all over one of these builds

 

I was just going to look on hondata to see if the ecu was programmable.thank you for saving me time. Yes they are tons of fun,I just sold my old school Buggy with a carbureted 1835 vw motor,too fund this new build. The k24a4 motor is on its way and I can't wait to get the whole thing up and running. I will be referring back here for motor upgrades in the near future,I just need to get everything squared away first.thank you guys

 

I came I'm contact with s guy who does these, he said to use a 02-04 rsx-s harness and ecu.he gave me a price of 530 for the harness and ecu(before it is sent to hondata for the Offroad tune). I was hopping to keep it on the cheap with stock parts and then when I had enough cash I would send in the ecu to hondata.

 

Ok so I just bought 03 rsx ecu(pnd-a07) and an engine harness off an 03 rsx type s 6 speed for 305 total on ebay. I will send this off to hondata for the k-pro when I get the extra cash.
one more thing,I know this is a wiring/electrical thread but...will k20 header work on a k24a4 head?

 

It connects the same to the head. The difference is clearances issues with many kswapped Hondas. You can probably make it work fine depending on your clearance issues.

 

Ok cool,yeah clearance issues shouldn't be a problem with this project.

 

I added a pic to my orig post.
I am going thru and deleting all unnecessary sensors and coolant lines(i.e. iacv,air bypass valve,coolant thru manifold,etc...) I will be running k-pro and would love alittle help with what bare minimum sensors are needed.

 

I know you can get rid of the IACV and Evap Purge System. But I know you need that TPS (the one removed on the TB in the picture). There may be a few other sensors that can be deleted but I think you need them all.

Are you still trying to use that Bug trans?

 

I have a new tps coming, the original broke before I got the motor.I'm got rid of the iacv then pulled the hard lines and plugged them on the tb,I bought the egr plate but them decided to build my own water neck/egr piece with outlet coolant line only.similar to the k tuned one.I will eventual pull all hard lines/nipples and put an fittings in there place.lots to do on the list just a matter of getting time. I will be using the vw bus trans still, and am in contact with a somewhat local guy who runs k series motors in his buggies and built the adapter kit for this motor to trans combo.he also told me he has an Offroad tune they use, but I will trailer it to a dyno/tuner for the best results.

 

This site is awesome with tons of knowledge and I'm now hooked.thank you to all

 

Thats amazing that kpro will let you run the old VW trans. Keep this thread updated. You'll be educating me and I always like learning new things.

 

Here is a pix with a k24.

I almost did a j motor so here is one of those too

 

Check out some threads on different intake manifolds. You can get a RBC (06-10 Civic Si) for around $200 shipped and gain some top end ponies....and it will react better to any mods you add later. There are other options but the RBC is good bang for the buck. I got one on my type R swap.....it almost a minimum standard for k series guys now days.

 

Ok just an update, project is moving and I'm using a kpro ecu.I'm going to attempt a wire tuck after i wire in the motor,when i know everything is good. I still need more tube work,but here it is.

 

Awesome project. I'm surprised I've never seen this thread before.

 

Glad to see the project is still going :up:

 

The trans will have no signal (no sensors are needed), and the ecu will only be running/communicating with the motor.

 

Just an update...
I followed hondata's wiring and eliminated the o2 sensor/heater relays and moved altL(blue/white) from connector b (iirc) to a indicator bulb directly. I kept the 03 rsx-s harness intact with the exception of the ckp connector,freeing up the ect connector to reach the ect sensor, and ridding all the plastic extras. Fuel system is in place and will hopefully finish up my switches/dash tomorrow and start it for the first time.

 

...And done (until powder coating).