Honda Car Forum


Go Back   Honda Car Forum - Accord Parts Civic Tuning Acura Racing > Discussion > Honda Technical

LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 26 Nov 2009, 10:01 am
Junior Member
Join Date: Nov 2009
Posts: 1
Default I'm wanting to buy a 1992 honda civic hatchback vx but need more info before i buy...?

The vehicle is in great condition picture wise... the owner said it has around 30,000 miles on the engine that was bought from japan and just needs a new cold air intake system. Body of vehicle has 160,000 miles on it. I have no knowledge of what a Honda civic hatchback v.x. is or its capabilities. he says it goes 45-55 miles to the gallon and it mite need a new clutch. can anyone tell me how much i should spend on this vehicle, and what should i expect out of the vehicles performance?
Reply With Quote
  #2 (permalink)  
Old 26 Nov 2009, 10:16 am
Senior Member
Join Date: Aug 2007
Posts: 116

It's a crap shoot buying a car this old. It has a new engine, that's a plus. But the rest of the car, clutch, transmission, differential, suspension, steering, electronics, etc. are still very old. The engine isn't the only expensive component to fail in a car. So it would be unrealistic to expect this vehicle to be trouble free.

As far as performance goes, forget it. This is an economy car. It is made for fuel economy, not speed. So if you ever expect it to be fast, you will be disappointed. Throw all the performance upgrades at it you want, it will never be fast. If you want something fast, get a Mustang GT or a Z/28. If you want economy get a Civic.

As for the price, I wouldn't give more than $1500 for it tops.

Forget the cold air intake. These are eye candy only. Just a way to entice you into buying a fancy air filter that you don't really need.

Here's why cold air kits don't work.

First, you need to think of your engine as an air pump. If your 1.5 liter engine had the perfect cylinder heads, perfect camshafts, largest possible valves, perfect intake manifold, at 5900 RPM when it makes its maximum power, it can only flow about 156 CFM of air. I doubt you have these perfect engine components, so the engine flows considerably less, as much as 25% less. It's not as though you are feeding a big block V8 with a big Holley carburetor. So how much airflow do you really need? In addition, believe it or not, the factory engineers designed your stock air intake including the stock air filter to supply the engine with more than enough air.

Next, you need to examine the throttle body and the tube that connects it to the air filter housing. I will use my car as an example. The engine is a common multi port fuel injected, 3.1 liter V6. On this engine, if you measure the diameter of the throttle plate, it is 2.035 inches (52 millimeters). If you measure the diameter if the stock pipe that connects the throttle body to the air filter housing, it is 3 inches, (76 millimeters). Since the stock pipe connecting the throttle body to the air filter is already 50% larger than the throttle plate, adding an even larger pipe will not flow any more air than can already pass through the throttle bore. No real improvements here unless you also add a larger throttle body and enlarge the throttle opening in the intake manifold.

If you examine the stock air filter housing you will see that it draws its air from an opening in the radiator core support, drawing air from in front of the engine compartment. This air is already relatively cool. No gains found here.

The name "Cold Air Intake" is very misleading. On a cold air intake, even if it has some kind of intercooler, it will NOT cool the air any cooler than the ambient outside air temperature. Also, consider that the air passes quickly between the air filter and the throttle body, too quickly to absorb any significant amount of heat. With a V8 engine, you gain about 1 horsepower for every 10 degrees Fahrenheit drop in temperature. Therefore, even if you could drop the incoming air 50 degrees, you gain a measly 5 horsepower. These gains are proportionately less on smaller 4 or 6 cylinder engines. Therefore, they are hardly worth the expense.

Another thing to consider is that your engine is equipped with an EGR (Exhaust Gas Recirculation) valve. This device dumps between 5% to 15% hot exhaust gas from the exhaust manifold directly into the intake manifold. This exhaust gas is over 1200 degrees F. A cold air intake can't make a difference over this extremely hot gas. Your engine is tuned to operate with this so it is not a problem.

The air filter used in the cold air intake is the only component that may give you any real improvement. In general these air filters will flow a little more air than the stock paper disposable element, but only if they are routinely cleaned and oiled. If they are allowed to get dirty, they will work no better than the stock paper air filter.

Instead of the cold air intake, I would just simply add a low restriction air filter element.
Reply With Quote
  #3 (permalink)  
Old 26 Nov 2009, 10:46 am
Senior Member
Join Date: Nov 2007
Posts: 103

The engine should not need a cold air intake system. I had a 1993 Civic that worked great with just a K&N air filter. There is something wrong here.

If it was my car in the shape the owners says it is in I would not be selling it. And 1992 - 1995 Civics are the most desirable cars. I drove mine for over 350,000 miles and miss the car even though the engine was dead(replaced once with a used one), the 5 speed missed 3rd and 4 th gears, had body/rust damage. (1992 - 2008)

The VX was the more expensive high mileage car option. I bought anew CX what was the basic gas saver. It was good for 42 mpg city and 46 mpg highway.

You will know if the car needs a new clutch or not if you can not shift. Like most stick shifts you can speed shift, or shift gears without using clutch at the right rpms. But there is a problem that a clutch would go at such low mileage. My car still had a working clutch and many original parts I drove it off the lot new with. Clutches can be adjusted.

I would guess asking on the low side of $2,500 since the owner does not even know how bad the car is. They know nad are playing dumb. or they would not be trying to sell it.

The HX is made to save gas, not for speed. But even my CX with a 1.5 liter engine was amazingly fast for being a econobox. Not to mention extremely fun to drive. With a low first gear it was faster than most cars, just until I hit fourth gear and started loosing the acceleration.
Reply With Quote
  #4 (permalink)  
Old 26 Nov 2009, 11:01 am
Join Date: Sep 2009
Posts: 84

30000 mile engine shouldn't need a new clutch for another 50000 miles, cold air intakes are a waste of money and lead to poorer mileage in injection engines something is not right here I would walk away , $300 tops
Reply With Quote
  #5 (permalink)  
Old 26 Nov 2009, 11:16 am
Senior Member
Join Date: Aug 2007
Posts: 145

You also should compare car insurance quotes for cars before buying one, for example here -
Reply With Quote
  #6 (permalink)  
Old 26 Nov 2009, 11:31 am
Join Date: Aug 2007
Posts: 35

go to this website

they should tell you about this little cars.

d-series is for the motor name example D-16z6/d16y8/y7

chek that site up
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Which car is better a 1991 Honda Civic Si Hatchback or a 1992-1995 Honda Civic Hatchback ? GooNii3 Honda Technical 7 03 Nov 2007 12:36 pm
Which car is better a 1991 Honda Civic Si Hatchback or a 1992-1995 Honda Civic Hatchback ? GooNii3 Honda Technical 0 03 Nov 2007 12:10 pm
Which car is better a 1991 Honda Civic Si Hatchback or a 1992-1995 Honda Civic Hatchback ? GooNii3 Honda Technical 0 03 Nov 2007 12:10 pm
I need info on changing a master cylinder in a 1991 Honda Civic SI Hatchback. Can anyone suggest... Maximillian Honda Technical 1 27 Oct 2007 12:48 pm
Does anyone have info on an RSX engine swap for a 92-95 civic hatchback? kevin Honda Technical 3 08 Sep 2007 05:10 am

All times are GMT -5. The time now is 10:29 am.

Honda News | Autoblog
Powered by Yahoo Answers

Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc. is not affiliated with Honda Motor Company in any way. Honda Motor Company does not sponsor, support, or endorse in any way. Copyright/trademark/sales mark infringements are not intended or implied.