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Look at the other pins and you'll see why you need the Si harness. Thankfully, the 10th gen Civic is forgiving with regards to features being present or not, so I don't have adaptive suspension errors, CEL, or warnings about the heated seats, LaneWatch camera, etc. The only code you can scan...

Highly recommend you swap the ECU, harness, and engine at the same time. Doing the harness with the engine out, is easy. The clips are placed intelligently, harness routes very intuitively. Doing a harness with the engine in, requires skinny arms, long fingers, and the ability to work blind...

People don't want to accept the truth lol. The hood is the biggest factor, just ball up and cut it. Once the hood is vented, changing the radiator makes an even bigger difference, an oil cooler helps further, and combined with an ethanol tune you are reasonably set for a non-aero FK8, even if...

Transplant your Sport's seat harness into the Si seat and it will all bolt and click in.

Oh, if we're talking wagons, I just acquired one of my dream wagons. 6 cylinders, 5 manually-shifted gears (soon to be 6), big enough to sleep me and my wife in, timeless aesthetics inside and out, AND gets a solid 35mpg on the highway. Just look at the slide-out rear shelf lol, this...

I'm a motorsport person. The sedan is too long, it was either going to be the coupe or the hatchback, but the coupe wouldn't allow me to develop products for CTR. Hatch it is. The swap ended up being motivated by me blowing up the Sport engine and turbo from oil starvation. I have not done a...

No... Smog legal Si whole powerplant/emissions swap and interior conversion. Suspension and brakes were upgraded beyond Si spec. https://www.civicx.com/forum/threads/fs-18-civic-si-hatchback-conversion.57812/

Been here before, in everything from bone stock cars to prepared race cars - You barely need to do anything, esp the 2.0NA engine. The stock brake lines are fine, the rotors are large enough; you SHOULD flush brake fluid for a high-temp one as you'll be getting the fluid hot (once you start...

I don't know who needs to see this, but I am selling an Si converted 2018 hatch for $21,900. Fuck a car with unknown history and even worse, sketchy dealers... if you guys are looking for a used Civic X doesn't it make the most sense to see if forum members are selling? 😛

With adequate water cooling, oil cooling, oil supply, and reasonable load, an L15B will survive on the bench. Cars are complete systems working in the real world, however. Let's say you seriously tried to "Wangan Midnight" your Civic, averaging at least 100mph - after just 30hours you've...

Antigravity makes awesome batteries, one of the few brands that can long-term survive the alternator charging it back up in bursts (alt varies with rpm and load, just so we're on the same page). It's worth the money if you are going after times. But you do have to keep it on a trickle charge if...

86CUP is a spec ZN6 series that has repeatedly shown you can bash on the FA20 literally all day long as long as it's not majorly modified. Super Taikyu ZN6's have stock, SEALED engines that run for 24hr races. Contrast that to the efforts Team Honda Research and JAS went through to get the...

Everyone wants FI until you realize that a turbo engine floored all the time has a lifetime measured in hours, not years. Given that the BRZ/86 formula is to let drivers go absolutely nuts in it, I totally get why they went for a larger displacement NA engine instead. I'm not in love with the...

A stock CTR will just about fail to pass a Miata in a straight line after ~5 WOT laps on track, it's absolutely miserable.

The dyno video showed 274-278 Corrected Engine HorsePower. That's nothing to bother with, it just means the air conditions were nice. CTR's regularly dyno 300 *wheel* horsepower in good conditions, and below 200 if you get them hot enough. Turbo cars are silly like that, the horsepower numbers...

Those sold immediately after I took them off last year. Dunno how you see a custom trunk in these pictures. I even wrote that it's all factory Honda parts. lol...

The original probably got axed when I demoted from vendor to personal account. MAP's oil cooler doesn't use a thermostat for flow and space reasons, so for daily driving, the oil cooler is covered up to allow the oil to hit ~190F. It's a purposeful compromise, you can still do highway pulls and...

You may have seen it before, you may already know, but - the Si Hatchback is done! Asking $22,000, it's a properly executed, fully prepared car equally happy to daily drive, carve backroads, or race on track. The conversion: - Brand new Si L15B7, sourced directly from Honda - Brand new Si...

I have seen some tall-ass mudflaps on the internetz. I get it, but at the same time, it totally ruins aero (fuel economy) so I'd rather just PPF the at-risk areas on the fenders and doors and call it a day.

I grew up racing 1/28's competitively. Small car = low cost, but disgustingly fast scale speeds and reaction times made it good training for real car racing. Ended up designing and selling my own carbon chassis kits near the end of high school, I miss when I had the dedicated time to do all...