KPower Industries K24 swap

[Ebush]

If you want the car to be a little more exciting for daily driving, I recommend setting the vtec to 4K rpm rather than the 3650 it’s currently set to. I played around with different crossover points today and this spot seemed to work the best. Well I’d say the best is probably 3650, it’s super smooth (can hardly tell the crossover happened), but it’s not exciting.

15 years ago I was big into NA B series civics, and recently built myself a daily that can function as a great car to take to the mountains. It’s just a 98 civic hatch with a stock B16B swap, when vtec hits the car pulls so much harder, and it’s a very loud crossover. I wanted that same feeling with the 86.

Anything higher than 4K and the car felt slow down low, but I couldn’t tell a difference between 3650 and 4000 other than it was just more of an event when vtec hit. I did do a little tuning to make sure that everything was going good.

If you go to main setup in the Haltech, you can let the ECU learn fueling and timing needs. For fuel go to 02 control and then long term, enable that. And then for knock go to knock control and enable that. You can then go back into there and click apply to base after driving around for a while. If you leave these on the car will continue to apply what it learned up to a certain point, applying to base just ensures it can continue to do so.

[hedtrip]

awesome info. Cant wait to play with the Haltech.

[brzlegend]

Originally Posted by Irace86.2.0

On the fuel system, what is everyone doing? I don’t know enough about the fuel system to make a decision, but what I read is that the rear fuel line is port, the middle is EVAP and the front fuel line is for the direct. Kpower suggests using this line and plugging/removing the other lines. One plug is a hard plug because it is under pressure. The other is a soft cap for the EVAP system, which is removed.

Here is a point to ponder: from what I understand the fuel tank has a single output that bifurcates equally to the port and direct lines; I don’t know if the main line is larger than the two lines, but if so then going to one line seems like a potential restriction; it probably isn’t a restriction for NA setups, and I’m aware that even small lines can support a lot of power, but for running 400whp with E85 that requires 30% more fuel, it seems like going from two lines to one could be a problem.

I was thinking of just using both line by teeing the lines back together before hooking up to the frame rail. All of this isn’t necessary if the system is entirely the same size like say 5/16 from pump to rail, but again, if the lines split to half or were only 1/4 or less then that could be an issue. I’ll have to look, but if anyone knows then that would be cool.

Fuel line will not be a problem the transmission will go before the line is a restriction.

[Irace86.2.0]

Originally Posted by brzlegend

Fuel line will not be a problem the transmission will go before the line is a restriction.

Transmission will get an upgrade to a CD009 or something someday. No sense in redoing it later or pulling the extra line like they mention. I could just cap it instead of pulling the extra line. My concern was that Toyobaru maybe split the fuel system from 5/16 or 3/8 to two small lines that were like 1/4 or something, so running one line was going to be a bottleneck. I haven't measured the lines. Do you happen to know the size? I know the lines to the fuel rail is 5/16, but are both that big all the way back to the point of bifurcation, and if so, is the line to the tank 3/8 or 5/16 as well?

[captain awesome]

Quick question for those deep into this swap. When you turn on the heater fan in the cabin, does it turn both fans in the bay on for you? I know with A/c it will do that or should, but to my knowledge shouldn't with just heat.

[dragoontwo]

Originally Posted by captain awesome

Quick question for those deep into this swap. When you turn on the heater fan in the cabin, does it turn both fans in the bay on for you? I know with A/c it will do that or should, but to my knowledge shouldn't with just heat.

Which vents do you have the air set to go through?

[brzlegend]

Originally Posted by Irace86.2.0

Transmission will get an upgrade to a CD009 or something someday. No sense in redoing it later or pulling the extra line like they mention. I could just cap it instead of pulling the extra line. My concern was that Toyobaru maybe split the fuel system from 5/16 or 3/8 to two small lines that were like 1/4 or something, so running one line was going to be a bottleneck. I haven't measured the lines. Do you happen to know the size? I know the lines to the fuel rail is 5/16, but are both that big all the way back to the point of bifurcation, and if so, is the line to the tank 3/8 or 5/16 as well?

This is on e85

1 Transmission
2 Return fuel system with boost reference
3 Tires
4 Axles
5 Address the fuel pump being at the front of tank which causes fuel starvation, from g force under acceleration.

6 Worry about oem line size here which is ~5/16

[captain awesome]

Originally Posted by dragoontwo

Which vents do you have the air set to go through?

Hmmm. Didn't think of that, but defrost. I don't recall them kicking on in defrost before though? I'll check in other positions and see if that makes a difference.

[dragoontwo]

Originally Posted by captain awesome

Hmmm. Didn't think of that, but defrost. I don't recall them kicking on in defrost before though? I'll check in other positions and see if that makes a difference.

A/C automatically comes on in defrost.

[captain awesome]

Originally Posted by dragoontwo

A/C automatically comes on in defrost.

Well I'm a dunce. I thought it only did if the button was pushed and the a/c light was on but I think you're right. I'll confirm this evening.

[Ebush]

Originally Posted by captain awesome

Quick question for those deep into this swap. When you turn on the heater fan in the cabin, does it turn both fans in the bay on for you? I know with A/c it will do that or should, but to my knowledge shouldn't with just heat.

Yeah it shouldn’t be working like that. When I first started my car I turned heat on full blast and let run until the fans come on at 195. I’d maybe check to make sure your ac plug isn’t shorting out causing the ECU to think the ac is on.

[Irace86.2.0]

Originally Posted by brzlegend

This is on e85

1 Transmission
2 Return fuel system with boost reference
3 Tires
4 Axles
5 Address the fuel pump being at the front of tank which causes fuel starvation, from g force under acceleration.

6 Worry about oem line size here which is ~5/16

Yep, have E85, will do transmission, I don’t know if this is necessary from others I have seen but doable, have 265 Michelin PS4s, axles can get, get surge tank if necessary, but probably not…so the line is 5/16 from the tank, and then splits into two 5/16 lines is what you are saying because if that is the case then I’ll be fine, but if the line splits to 1/4 and then steps up to 5/16 at the end to fit a common/standard quick connect size then that would be bad, so which is it?

[Irace86.2.0]

I emailed Kpower who said they may have a flex fuel kit out in a few weeks. That should make everything plug and play to the clip they integrated into the harness. I’ll probably wait on that, so I can utilize the available plug and be easy.

[captain awesome]

Originally Posted by Irace86.2.0

I emailed Kpower who said they may have a flex fuel kit out in a few weeks. That should make everything plug and play to the clip they integrated into the harness. I’ll probably wait on that, so I can utilize the available plug and be easy.

If they have one that fits your needs go for it, but you will still be limited to the fuel line they are using which will be 5/16". If you plan to go larger I don't know if there's a benefit other than the ac2 plug being pre-pinned for you and maybe a bracket to hold the sensor. I'll post up pics of how I did mine but still waiting on my ac2 plug to come in and have it officially wrapped up.