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Old 15 Feb 2013, 03:47 pm
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Default Adding a turbo to my honda civic?

I have a 98 honda civic ex d16y8 engine single cam no vtec. I would like to install a turbo but first i want to know the basics. Is there a specific turbo i need to install. About how much more hp will i gain. And will headers also add more hp to my car. And what else should i know about turbos. And also some other things that may add hp to my car. but something realistic. i wont really be able to afford a new engine or buy a new car

i was doing some research and my vlave cover doesnt say vtec but the car acually has vtec
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Old 15 Feb 2013, 04:02 pm
Join Date: Jul 2008
Posts: 41

Adding a turbocharger to your car is not a cheap venture by any means. It's a serious modification that if done improperly can cause serious damage to your motor, including blowing it up.

The engine you are starting with was never designed for performance, so take that into consideration when you add a turbo, you can't really push that engine to the ragged edge before it will break.

Turbo basics: It's an exhaust driven air pump. The burnt up air and fuel mixture exites your motor and spins the exhaust side of the turbocharger and then exits out the exhaust pipe. The spinning action turns the impeller blade on the compressor side of the turbocharger, sucking in air and forcing it into the motor at a greater pressure than is normally possible, hence the term boost pressure. Compressing the intake air creates heat, which is why people use an intercooler to try and cool the air down. Cooler air is denser air, more air=more power.

There is not set amount of power you should expect from a turbo since they come in all different shapes and sizes. The size of the exhaust housing can determine how fast the turbo spools up, how much boost it can make, etc. Same goes for the compressor or cold side of the turbo, if it's tiny you will get boost faster in the rpm but it will choke out on the top end, or if you get a massive turbo you will make a lot of boost on the top end but it won't really do much at low rpm.

If you have a turbo, you no longer have a header. You have a turbo manifold, usually just a pipe that routes all four exhaust ports directly to the exhaust side of the turbo, then a downpipe connects the turbo to the exhaust.

There is also a lot of additional things to consider than just putting a turbo on the car.

You'll need to have the downpipe made. If you're adding more air, you need to add more fuel. Along with that you will need to have a custom tune for your car to tell the motor how to handle the extra fuel and air. Without that you run the risk of the engine running lean, meaning not enough fuel, then the cylinders can get so hot they burn a hole in the piston or cylinder wall.

If your turbocharger does not have an internal wastegate to bleed off the extra boost your engine makes, you will need to purchase an external wastegate. This is important because without it you can push too much boost into the motor and blow a headgasket or bend a connecting rod like a pretzel before it explodes out the front of your engine or oil pan. You'll want a blow off valve so that when you let off the gas, the boost that is in the intake pipe can escape, or else it tries to go back and stock the turbo from spinning and that can damage the turbo.

You'd need a stronger clutch at well, the stock Civic clutch was meant to handle maybe 80-90 ft-lbs of torque from the factory, now you're going to be doubling that amount or more and it won't be able to hold and will start to slip.

Please understand that turbocharging a factory non-turbo car that originally was designed to make 100hp or less is a complicated and expensive process. Whatever you do, stay away from cheap parts that you see on eBay, most of that stuff is total junk, there is a reason a good turbo alone costs $600 or more but you can find one on ebay for $250, it's junk! As long as you map out a plan and don't try to cut any corners, when you are finished you will have a car you can be proud of and know is just as reliable as the day it rolled off the assembly line. Good luck!
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Old 15 Feb 2013, 04:16 pm
Join Date: Oct 2011
Posts: 34

It would actually be cheaper to get another engine than to go boost. Boost will make your car way faster though. You can also find a nice fast engine for under 2000. Go B series.
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Old 15 Feb 2013, 04:32 pm
Junior Member
Join Date: Feb 2011
Posts: 10

so roman is correct, but dont let him talk smack on your motor, cometic head gasket, forged internals cams cam gears a junkyard turbo set up and possi bly a mini me swap which is throwing a vtec head on your non vtec block could make a mean little car, but your looking at 2-3 grand for aybe 180 hp? do a h22 swap you will get 200 hp stock for under 2 grand
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Old 15 Feb 2013, 04:47 pm
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Join Date: Aug 2007
Posts: 121

D16y8 is a vtec? Noob^
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