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Old 18 Jul 2008, 05:01 pm
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Default Want to swap a B18 in a Civic and go turbo on the stock engine. Good/bad idea? Advise?

I want to swap a B18 into my 94 Civic and go turbo right off the bat just so I can get the significant horsepower gains sooner. I would eventually replace the piston heads, shafts, and all the other necessary upgrades... If you know ANYTHING, advise, knowledge or anything of that kind about doing a swap like this, please let me know all you can about a B18 turbo swap. Good idea or not???
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Old 18 Jul 2008, 05:16 pm
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Since you didn't specify which B18 you're using, I'll assume you're going to use a B18C variety.Which gives you 170 horsepower, roughly, depending on which version you have.From that, subtract drivetrain and restriction loss, and you have around 145-150 actual horsepower.Which is basically a worthless engine.However, you also have high compression, which means you'll need to replace the pistons immediately, if you want to go turbo. Otherwise, the increased compression of the turbo, will blow the engine to bits.However, even if you drop the compression, and up the turbo, you'll still end up with an engine somewhere in the 200-250whp range. Or less than a stock engine on many other sports cars. And you'll have spent more money than just buying one of those to start with.For significant horsepower gains, get rid of the car. Don't waste the 5-10,000$ in turboing your vehicle, which will only put you at the same level as a stock GSX or 300zx, when you could get one of these, put the same money in it, and be significantly faster than most other cars on the road.
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Old 18 Jul 2008, 05:31 pm
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heres a suggestion to you....go to your local tuning shop and discuss with them what you want to do and what your range of horse power your looking for. from there they can walk you through with different types of set up and what would work best for you, your wallet, and your car
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Old 18 Jul 2008, 05:46 pm
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The B18B is a good engine to turbocharge for a number of reasons (strong rods, lowish compression ratio, thick cylinder walls and great engine management options). The key to a reliable forced induction set up on a normally aspirated engine is appropriate engine management and conservative boost. Plan to run low boost (6-8 psi) and a front mount intercooler. Use a smaller turbo (stock Eclipse and Talon turbos work well because they are mapped for 2.0 liter) with 390 or 440 injectors (again from Eclipse and Talon-390 auto versions and 440 was 5spds). Next step up to a Hondata or AEM UEGO. Do not balk at the price. Spend the money now, or walk later. Generally speaking, each intercooled psi is worth 7hp. At the lower end, you could take a 140 hp B18B and at 6 psi add 42 hp. This will make you very happy, it will also go up in smoke as the passenger wheel spins with zero grip. Step #2 is an LSD (limited slip differential) but that's lots more and lets stick to a budget. Another alternative is the B20B, it's the stock CRV engine with more torque than the B18B. It is just as easy to turbo. Good Luck
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Old 18 Jul 2008, 06:01 pm
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Consider how much miles you have on that motor before boostn it cause i seen motors go BOOM. Even on a freshly rebuilt but with poor tuning set up. I take into consideration on getting some type of management prior to installing that turbo on there buddy. Turbo = a whole lot of compressed air which means having to add a sufficient amount of fuel and timing. So don't forget and don't be cheap get you a good engine management. Good Luck...
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