Timezone wroteHere's a few I suggest:
whered you copy this from, so much wrong information here its crazy
One of the best possible combinations of cost and horsepower, the G23 engine swap in a Honda Civic is not for everyone. Gone are the easy bolt in and swap guides, because most of this engine build will require some serious planning and engine work. This is a frankenstein of Honda engines, made up of several different Honda engine components.
The use of a SOHC 2.3 liter F23 shortblock with a H22 cylinder head can result in an excellent 2.3 liter VTEC Honda engine. People with the proper knowledge and patience and build an awesome G23 that delivers more power and torque than the K series engine, at a fraction of the cost. When installing an upgraded clutch, it's a good idea to step up your clutch master cylinder like this unit. It's designed to deal with the high pressure nature of your pressure plate in the 2.3 liter engine and allows you to shift faster and more crisply.
Where most K series engine swappers are going over 7,000 dollars in parts and components, the right G23 can be built for well under 2,000 dollars.
Why the G23 VTEC swap in a Civic works -
Torque - And lots of it with the 2.3 liter SOHC F series shortblock, and if you are looking for an all-motor solution the G23 VTEC engine swap is one of the very best.
Cost - Cheap and well under the cost of a K series engine swap or J series engine swap, you won't get a better dollar to horsepower ratio out of any other engine swap on our guide.
Why the G23 VTEC swap in a Civic doesn't work -
Not easy - Again, not rocket science but if you just buy the parts and expect it to slap together, you've got another thought coming. The G23 is a great and flexible build, but again it's not for everyone. If you are not comfortable putting an engine together or checking for clearances, it's best to seek a pro who can help you with your project.
- K-Series Swap
The cutting edge technology that drives the new i-VTEC mechanism in the K series engines first burst on the scene in the Honda Civic EP3 Si. This DOHC engine strays quite a bit from the older B series cousins, but the K20 is undeniably at the forefront of Honda engine swaps. For more reading on the K series, check out our What is the K20 primer here.
Available in many Acura and Honda vehicles, the K20A is found in the early 2002-2004 Acura RSX Type S, after this year range it's the K20Z1. Many of the later model K series engines also come as a larger displacement motor, with a 2.4 liter K24.If you can source one from a TSX with a six speed manual transmission, building a K24 hybrid can provide over 220 naturally aspirated horsepower which makes for a potent power to weight ratio.
The new i-VTEC variable valve technology is what pushes these K series swaps onto the list. Available with 197hp on entry-level 2.0L engines, you can find JDM versions that can exceed 220 horsepower in factory form.
Why the K series swap in a Civic works - As the next step in Honda's VTEC technology, the K series has plenty of love from the aftermarket companies and support. If there's a part you need or modification you aren't sure about, finding information on the K series engine swap is easy.
Why the K series Swap in a Civic doesn't work- It's not the cheapest engine swap out there, and people predicted that the price point would be driven down as time goes by, but this swap is still pretty expensive. If you have over $6000 dollars burning a hole in your pocket, that can get you started. Compared to other options on this 10 best Honda engine swaps, this price makes this swap prohibitive to many people.
You also need several changes and additional components to make a K series swap in a Civic work. The additional cost of these parts and components detracts from the overall value of this Honda engine swap combination.
Mounts - You won't need as much modification as the J series engine swap, but modification is still required.
Transmission Differences - Have a K20 swap engine but not sure what the differences are between the different K series transmissions? Check out our how to guide here.
Because the exhaust now faces your engine firewall, smogging your Honda engine swap will be difficult if you live in a state that cares about that kind of thing.
The black sheep of the Honda engine family has enjoyed a recent revival of sorts, as the H series swap in a Civic has found new life with the H2B transmission conversions. Using the B series transmission allows H swapped Hondas to enjoy the wide range of B series transmission components like flywheels or clutches.
Further the shortened gear ratio and host of aftermarket parts for the B series transmission make it easily one of the most popular mods for anyone who owns a H series swapped Honda.
You can find the H series engines in the Honda Prelude, from 1992-2001.
Why the H series swap in a Civic works - Lots more displacement available to you, and the H2B or H series swap is also smog eligible for those who live in California or Arizona. With a few engine tweaks and tuning, achieving 220+ wheel horsepower isn't very difficult.
Why the H Series Swap in a Civic doesn't work - The H series engine is larger and thus has much more bulk to the equation of figuring out which is the best Honda engine swap. Things like balance shaft belts will add to the complexity of your engine maintenance.
Engine modification components won't be as cheap compared to your B series peers, but there's still a healthy variety of parts to choose from.
Mounts - Because the H series engine was never intended to fit in a Civic or Integra chassis, you won't be able to combine factory OEM Honda mounts to complete your Honda swap.
- B18C1 Swap
And you were expecting???
When you think about every single way you can imagine the pros of a B series engine swap, the B18c1 simply trumps them all. Cheaper than the Type R engine B18C5, and more torque than the B16, the B18C1 is found in 1994-2001 Acura Integras with VTEC.
The cost of the B18C1 engine swap has gone down somewhat, but it's still not very cheap because of the high demand. Swapping a B18C1 into your Civic can radically transform how your Civic drives from the get go. You'll be an immediate difference down low as well, unlike the B16.
Why the B18C1 swap in a Civic works -
Bang for your Buck- High bang for your buck value when you compare how easy this swap is compared to any of the others on our Top 10 Best Honda engine swaps countdown.
Ease of Install - If your Civic has VTEC already, this is probably the easiest motor swap project you could undertake. Check our Honda Swap Combinations guide to see what fits what.
Parts, Parts, and more parts - Let's face it, there's more parts and components for the B series and the B18C1 than any other Honda motor ever. No matter what part you need or want for your B18C1, chances are someone makes them.
The B18c1 is also readily available and their demand decreases every passing day. You don't have to resort to importing a JDM B18C1 to get your GSR swap done.
The Law - You can also very easily smog your B18C1 swap, because so many of the factory Acura Integra smog parts can be installed in your Civic.