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 Post subject: how to tune a carb?
PostPosted: Tue Jun 17, 2003 3:21 am 
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Joined: Mon Sep 09, 2002 2:30 am
Posts: 438
Location: Zagreb
I have a G13B with 8 valve SOHC, <br><br>I would like to tune the fuel mixture, <br>I'm suppose to adjust it by turning some screw at the back of the carb, but where is it located?<br><br>Does anyone have any pics of it? and is there a special way of doing it?<br><br>This is my first car, and I'm new to cars, so I don't know much about setting up carbs. I do know how a carb works in theory. <p></p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Thu Jul 10, 2003 10:51 am 
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hope you read this, i used to have carbs and the air screw is on the back of the carb, you might need a vice grip to turn it and the throttle screw will help clean out the mixture too, timing also plays a good part in tuning carb engines...<br><br>does it burn alot of gas? my adcice would be to flush it with carb spray every week, yes, every weekend i used toi do it....<br><br>perace <p></p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Sun Jul 13, 2003 2:44 am 
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Joined: Mon Sep 09, 2002 2:30 am
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Location: Zagreb
ok, I think mine is using more fuel than it should,<br>also, how can I tell if I'm doing anything good? like am I suppose to watch the rpm or something? I've never done it before. <p></p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Sun Jul 13, 2003 11:20 pm 
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Location: New York State
On my 1984 Civic, I found that leaning out the mixture made the idle lower and caused it to stumble a bit and richening the mixture didn't seem to effect idle quality. So I just set it as lean as possible without stumbling. I don't know if it was the best way, but it worked pretty good for me. <p>--------------------<br><!--EZCODE LINK START--><a href="http://www.geocities.com/gasolinefumes/index.html"><!--EZCODE BOLD START--><strong>My Website</strong><!--EZCODE BOLD END--></a><!--EZCODE LINK END--></p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Thu Jul 24, 2003 5:32 pm 
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tune and drive, tune and drive...ive gotten my old carb runing to perfection <p>_________________________________<br><br><!--EZCODE IMAGE START--><img src="http://www.wheelsjamaica.com/wheels_forum/attachments/gtislinedup2.jpg"/><!--EZCODE IMAGE END--></p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Thu Aug 21, 2003 9:43 am 
Like an aircooled VW turn rich until it sputters and then take the mixture screw back a little. <p>---------------------------------------------------------------------------<br>Proud owner 2000 Metro poor mans special edition, 1984 Suzuki SJ410 poor mans rockcrawler (needs turbo 1L), 1992 Ford Aerostar Cargo van(The big white piggy, needs more dents and scars), 1964 POS Baja VW (needs to be put back together).</p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Thu Aug 21, 2003 9:44 am 
Like an aircooled VW turn rich until it sputters and then take the mixture screw back a little. Check you plugs. What do they read? Rich or lean? This is an easy way to tell how your carb is running overall. <p>---------------------------------------------------------------------------<br>Proud owner 2000 Metro poor mans special edition, 1984 Suzuki SJ410 poor mans rockcrawler (needs turbo 1L), 1992 Ford Aerostar Cargo van(The big white piggy, needs more dents and scars), 1964 POS Baja VW (needs to be put back together).</p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Fri Aug 22, 2003 8:17 pm 
With carbs, you have to analyse exhaust gases to make a precision tune. If you don't have the 5 gas analyser, you can just read plugs. <br><br>If you want to tune the idle, put in new plugs, let it idle 10-15 minutes, stop engine and pull plugs. <br><br>Black/soot indicates a rich mixture<br>white or light gray indicates a lean mixture<br>tan or light brown is good<br><br>If you want to tune WOT, then find a big hill. Drive to said hill. At the bottom, stop the engine. Replace the plugs with new ones. Start the car and go up the hill. Find the right gear so that the engine stays arount 5000 RPM at WOT. When you run out of hill, KILL engine and coast to a stop. Do not let the engine run off WOT. Kill it as soon as you let the pedal off the floor(gas off/clutch in/key off all in the same time). Stop the car and check the plugs. <br><br>That is the way racers tune the carb(s), and the proper way to tune carbs on motorcycles.<br><br> -TheDjost<br> <p></p><i></i>


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 Post subject: Re: how to tune a carb?
PostPosted: Sun Sep 21, 2003 2:21 pm 
very interesting! this room needs more visits though, did he even read this!? <p><!--EZCODE IMAGE START--><img src="http://www.wheelsjamaica.com/wheels_forum/attachments/gtislinedup2.jpg"/><!--EZCODE IMAGE END--></p><i></i>


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