fine tuning

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Jordi
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Re: fine tuning

Post by Jordi » Fri Oct 25, 2013 11:33 am

Run mine on the cheapest fuel I can get. It's timed up by sound. Runs spot on.
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Edweird
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Re: fine tuning

Post by Edweird » Fri Oct 25, 2013 12:10 pm

Jordi wrote:Run mine on the cheapest fuel I can get. It's timed up by sound. Runs spot on.
Same again. Mine's not got quite the get up and go Jordi's does, but 600cc and a custom exhaust will do that.
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Anton
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Re: fine tuning

Post by Anton » Fri Nov 29, 2013 2:48 pm

ScottieJ wrote:Do all the usual things, check plug gaps etc.

Running an SU carb yeah? first you need to make sure you are using the correct needle and spring for your engine http://forum.suzukiclubuk.co.uk/vi ... =13&t=2249

Then run your engine up to temp and check the timing is correct

http://sucarb.co.uk/technical-hif-type- ... ng-general

http://sucarb.co.uk/technical-hif-type- ... ing-single

Don't forget to make sure your dash pot is full to the correct level and preferably the correct grade oil, straight sae 20 weight oil is best and what you'll find in a bottle of SU carb oil.

When adjusting the carb blip the throttle and let is settle between every adjustment.

how to tell that your mixture is right when tuning by ear. Once the engine is up to temperature remove the air filter and use a screw driver to slowly lift the piston 1-2mm while it's idling and listen to what the engine does......

If it stumbles and the revs drop you are too lean so enrichen the mixture. (don't forget to blip the throttle and let it settle)

If the rpm picks up slightly (50rpm or so) peaks and then drops back to idle you are about spot on.

If the rpm picks up and continues to rise then you are running too rich.

I sort of do a combo of the above and also listen to how the engine picks up when you move the throttle, a few quick blips of the throttle and a steady rise etc.
Top man! I have no idea how to tune a carb, so this should be a great place to start if (when) my Hitachi carb fails emissions again...
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timwilks13
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Re: fine tuning

Post by timwilks13 » Fri Nov 29, 2013 3:05 pm

Anton wrote:Top man! I have no idea how to tune a carb, so this should be a great place to start if (when) my Hitachi carb fails emissions again...
I took a different approach in the end.

Step 1. Get your car running, no matter how rough,

Step 2. Drive 214 miles to wagtail.

Step 3. Let the zuk boffins tinker for 20 mins,

Step 4. Enjoy a tuned SU.
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dan_2k_uk
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Re: fine tuning

Post by dan_2k_uk » Fri Nov 29, 2013 3:08 pm

timwilks13 wrote:
Anton wrote:Top man! I have no idea how to tune a carb, so this should be a great place to start if (when) my Hitachi carb fails emissions again...
I took a different approach in the end.

Step 1. Get your car running, no matter how rough,

Step 2. Drive 214 miles to wagtail.

Step 3. Let the zuk boffins tinker for 20 mins,

Step 4. Enjoy a tuned SU.
:hahaha:
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Jordi
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Re: fine tuning

Post by Jordi » Fri Nov 29, 2013 3:12 pm

timwilks13 wrote:
Anton wrote:Top man! I have no idea how to tune a carb, so this should be a great place to start if (when) my Hitachi carb fails emissions again...
I took a different approach in the end.

Step 1. Get your car running, no matter how rough,

Step 2. Drive 214 miles to wagtail.

Step 3. Let the zuk boffins tinker for 20 mins,

Step 4. Enjoy a tuned SU.

Cheater!
1988 Samurai - Truck Cab & Tray Back - 1.6 8v & HIF44 - Snorkel - Stack Exhaust - PAS, YJs & 33s - Trussed, Gusseted & Pumpkin Capped Axles - 4.3 R&Ps - 4.16 T/Box - Rear Air Locker - Full Float Back Axle & Discs - RCV Front Shafts - X-Eng Handbrake - Custom Fuel Tank
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Re: fine tuning

Post by twiss » Fri Nov 29, 2013 4:19 pm

hahah like it! SUs are easy anyway... when they stay in one piece ;)
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Edweird
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Re: fine tuning

Post by Edweird » Fri Nov 29, 2013 4:33 pm

timwilks13 wrote:
Anton wrote:Top man! I have no idea how to tune a carb, so this should be a great place to start if (when) my Hitachi carb fails emissions again...
I took a different approach in the end.

Step 1. Get your car running, no matter how rough,

Step 2. Drive 214 miles to wagtail.

Step 3. Let the zuk boffins tinker for 20 mins,

Step 4. Enjoy a tuned SU.
It was a good plan though. On the way there, you couldn't keep up with me. On the way back, I was having to push Suzi a bit hard to keep up with you.
There's three ways of doing things:

The right way,
The wrong way
And my way, which is like the wrong way but faster.
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ScottieJ
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Re: fine tuning

Post by ScottieJ » Fri Nov 29, 2013 4:46 pm

would have helped if Tim's was running on all 4 cylinders for the drive down as well :hahaha:
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twiss
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Re: fine tuning

Post by twiss » Mon Dec 02, 2013 2:19 pm

Just be glad you weren't trying to follow me :P
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'93 Suzuki Samurai Sport 1.6 16v SU. Virtual lift, spring under, 31s
'93 Maruti Gypsy MG410

"If brute force doesn't fix your problem, you aren't using enough of it."
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