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Old December 5th, 2011, 08:25 AM   #1
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VTEC Controller!!!

In my attempt to tune my K24, I have tried many ways to change my vtec point. I currently run an Apexi Neo A/F computer and have a Buddy Club E-Throttle on order for my DBW management, but NOTHING to control VTEC.

The neo actually is able to control it. I have previously lowered it. The problem is, after about 2 miles of driving, the ecu throws a code, usually something related to the vtec oil pressure voltage being too low or too high. As far as I'm aware, there is no way to fix it. The code puts the engine into protect mode, which involves harsh bucking and a rev limit of 3k until you clear it.

I'm probably one of the only people still determined to tune this K24 to its max potential.

I know its futile but does anyone have a solution?
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Old December 5th, 2011, 08:28 AM   #2
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Maybe check what the civic guys are up to?? Seeing as they run k24 also.
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Old December 5th, 2011, 08:30 AM   #3
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its pointless. the motor is crap. You need new cylinder heads if you plan on making the N/A engine crank out more power. Don't waste your money trying to break the engine.
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Old December 5th, 2011, 08:52 AM   #4
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not trying to put it on a drag strip but the motor is not crap. If it didn't have this ridiculous ECU and the stupid eco vtec it would be a tsx engine. Aside from some key things like compression and cams they are broadly the same. But i'm interested in your idea.

Civic guys run hondata.
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Old December 5th, 2011, 09:02 AM   #5
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not trying to put it on a drag strip but the motor is not crap. If it didn't have this ridiculous ECU and the stupid eco vtec it would be a tsx engine. Aside from some key things like compression and cams they are broadly the same. But i'm interested in your idea.

Civic guys run hondata.
take your valve cover off, and take a valve cover off of a k20z1 rsx-s, or 06-08 k24 TSX. Than tell me if your motor is crap or not. The block is fine, the cylinder heads are garbage. They are SULEV. designed for fuel efficiency, and clean emissions. You can try all day long tuning it, you'll never be satisfied unless you swap the cylinder heads out, and go hondata or boost it.
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Old December 5th, 2011, 09:11 AM   #6
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k24a4 (your engine)


RSX type S.

You see the difference?
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Old December 5th, 2011, 12:05 PM   #7
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yea ive taken them apart before. I can't swap heads.
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Old December 5th, 2011, 04:28 PM   #8
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yea ive taken them apart before. I can't swap heads.
meaning you personally can't swap heads? or you saying it can't be done? if you're saying it can't be done, you are dead wrong.
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Old December 5th, 2011, 08:17 PM   #9
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No he can't get K-pro so the swap is not possible, is what I think he's saying.
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Old December 5th, 2011, 08:17 PM   #10
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What he said. Just swap pistons if you did otherwise P2V contact is a big no-no.
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Old December 5th, 2011, 08:25 PM   #11
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so can u just swap head? don't u need other thing?

i have a k24z3 from 8.5gen accord... how much difference is it comparing to the k24a series?

i heard that the k24z can't swap head to the k20 cuz of somthing of the manifold?

is that true?
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Old December 5th, 2011, 08:46 PM   #12
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You need kpro and you will need to change your pistons...as explained in the two posts above yours.
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Old December 5th, 2011, 10:21 PM   #13
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the pistons hit. ok if i wanted to go nuts, yes it is theoretically possible. but if I'm gonna go that far, I might as well just swap the motor entirely. No point in doing pistons, head, AND somehow piggybacking a TSX ecu. I'm not "dead wrong". Anything is possible sure but in the realm of "reasonable" this is not one of those jobs.
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Old December 5th, 2011, 10:22 PM   #14
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actually.. can the tsx pistons fit.. i don't even know
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Old December 5th, 2011, 10:24 PM   #15
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meaning you personally can't swap heads? or you saying it can't be done? if you're saying it can't be done, you are dead wrong.
have you seen it done cause i havent
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Old December 6th, 2011, 12:00 AM   #16
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i do it all the time.
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Old December 6th, 2011, 12:07 AM   #17
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Send a message via AIM to MatthewYu
Lol^
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Old December 6th, 2011, 09:55 AM   #18
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i do it all the time.
swap the pistons and head out of a tsx and into an accord? really...
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Old December 6th, 2011, 01:59 PM   #19
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swap the pistons and head out of a tsx and into an accord? really...
Dude im not sure if you know who nighthawk is but he builds these engines and knows his ****
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Old December 6th, 2011, 02:39 PM   #20
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swap the pistons and head out of a tsx and into an accord? really...
no I would order pistons with different faces, bore/hone and a cylinder head that will mate to the setup.

K series frankenstein builds...
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Old December 6th, 2011, 06:31 PM   #21
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Just run a kpro, your still going to need your old ecu for AC and stuff like that.

Dual ECU KPro Harness (Accord US/CAN 03-05)
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Old December 7th, 2011, 01:13 AM   #22
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nighthawk - i didnt know you did that. im impressed. i especially like the supercharger.

gizmo - i dont know why I havent seen this before. BUT if I invest the money into that... does it work for an 07? and will I be able to control vtec. thats all im after. I can do most of the other tuning with other computers and little add ons.
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Old December 7th, 2011, 05:35 AM   #23
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You will not need any other lil computers or things like the neo with kpro, it's a Modified Honda ECU that allows you to change everything! I suggest reading up some on k20a.org to learn some workarounds for your situation being DBW where there is a will there is a way
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Old December 7th, 2011, 09:38 AM   #24
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nighthawk - i didnt know you did that. im impressed. i especially like the supercharger.

gizmo - i dont know why I havent seen this before. BUT if I invest the money into that... does it work for an 07? and will I be able to control vtec. thats all im after. I can do most of the other tuning with other computers and little add ons.
K-PRO converts factory ECU into full standalone. YOu do not need any other electronics.


I tell and encourage people all the time to stick to a miminal amount of engine control modules. You only need one if one can do all. Having multiple is a pain in the butt for any mechanic and or tuner.

I'm not supercharged anymore. S/C = waste of gas and limited in power + heat soak.
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Old December 7th, 2011, 10:20 AM   #25
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lol guys I have an Si with hondata and I know what K-Pro does. I had no idea there was a harness. But like I said, if I go with the harness, does it work for an 07?
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Old December 9th, 2011, 12:36 PM   #26
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lol guys I have an Si with hondata and I know what K-Pro does. I had no idea there was a harness. But like I said, if I go with the harness, does it work for an 07?
you might need to do more work I think 07 is drive by wire... but you can always convert it back.
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Old December 9th, 2011, 12:57 PM   #27
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FYI my buddy has this for sale.

http://www.v6performance.net/forums/...kara-chad.html
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Old December 10th, 2011, 03:49 PM   #28
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You need kpro and you will need to change your pistons...as explained in the two posts above yours.

you don't NEED K-pro to tune it. K-pro is just the BEST option to choose when it comes to tuning for the K-series.

Quote:
Originally Posted by jconnway View Post
the pistons hit. ok if i wanted to go nuts, yes it is theoretically possible. but if I'm gonna go that far, I might as well just swap the motor entirely. No point in doing pistons, head, AND somehow piggybacking a TSX ecu. I'm not "dead wrong". Anything is possible sure but in the realm of "reasonable" this is not one of those jobs.
You don't have to piggy back a tsx ecu. If you know electrical and wiring diagrams, you can wire the k-pro into the accord ecu. I've seen it done persoanlly and another person on the forum (who isn't on anymore) has done it.

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have you seen it done cause i havent

Yes, as i've stated before. it has been done. k20 head from a 02-04 rsx-s onto a k24a8 from a 06-07 accord. tuned with k-pro and made around 240-250 ish to the wheels. all motor.
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Old December 10th, 2011, 06:10 PM   #29
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^^ I am thinking about doing this rsx s head swap. as far as the k-pro being wired into the accord ecu... idk man
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