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IGNITION TIMING http://www.woodsbuggy.com/phpBB3/viewtopic.php?f=3&t=17865 |
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Author: | gregmartin [ Wed Aug 19, 2015 11:51 am ] | ||||
Post subject: | IGNITION TIMING | ||||
Hello, Could someone tell if I got the TIMING correct on my VW 1835, I'm thinking I'm off a tooth or two. Or can you only be off 180 degrees. I have the # 1 cylinder TDC, the pulley lined up with the split case but the distributor gear is not perpendicular to the case like I think it's suppose to be. I think the rotor looks correct to the distributor cap. Another question I have is do I need a fuel pump when the fuel tank is about the same height as the DUEL WEBERS I'll be using, I'm thinking gravity will work. THANK YOU
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Author: | jimp [ Wed Aug 19, 2015 3:25 pm ] |
Post subject: | Re: IGNITION TIMING |
Carbs and fuel: Use a Carter rotary pump @4 psi with no regulator needed. Timing: As far as your distributor drive, the slot is clockwise too far. This is probably OK, but some want it original. If you are not afraid of losing the little washers down into the engine case, go ahead and rotate the distributor drive one or two teeth counterclockwise. Your rotor and distributor body are correct. |
Author: | gregmartin [ Thu Aug 20, 2015 2:26 am ] |
Post subject: | Re: IGNITION TIMING |
Thanks jimp, I though it might be off but I needed a verification before I changed anything. I am a little afraid of changing it and possibly losing those washers, is it true you can hold them I'm place through the hole where the fuel pump goes with a screwdriver ? I also Googled that CARTER ROTARY FUEL PUMP and it looks good and will be PERFECT. I appreciate you guys helping me out with all my questions on my project ( it's my first one ) It's good to get reliable answers from people who have experience in this stuff. Thanks. Sent from my iPad using Tapatalk |
Author: | jimp [ Thu Aug 20, 2015 7:43 am ] |
Post subject: | Re: IGNITION TIMING |
I doubt that you should pull that distributor drive out of there just for looks. In my opinion, the only reason that polarity is critical on the distributor is so that the vacuum-advance diaphragm body is located in the correct position for optimum timing adjustability. The risk of dropping those washers is too great to justify. If the engine has no oil and you can turn the engine upside-down on an engine stand, that is a little better. Yes, I have done it before. Disclaimer: Please do not confuse my subjective opinions as good policy. I am a "whatever-it-takes" hacker that takes shortcuts as long as safety is not affected. |
Author: | gregmartin [ Thu Aug 20, 2015 9:37 am ] |
Post subject: | Re: IGNITION TIMING |
So maybe I should leave it alone, and there is NO OIL in it yet. Will it run the same either way? Sent from my iPad using Tapatalk |
Author: | jimp [ Thu Aug 20, 2015 10:46 am ] |
Post subject: | Re: IGNITION TIMING |
I have seen these engines running well with that distributor drive in all kinds of positions. Unfortunately if the spark advance dashpot housing cannot clear the fuel pump or intake manifold, you may not be able to set your timing correctly. |
Author: | gregmartin [ Thu Aug 20, 2015 11:37 am ] |
Post subject: | Re: IGNITION TIMING |
This may be a dumb question jimp but I don't think I have a vacuum advance, do I ? Sent from my iPad using Tapatalk |
Author: | jimp [ Thu Aug 20, 2015 12:02 pm ] |
Post subject: | Re: IGNITION TIMING |
Your distributor has the appearance of what is known as the VW "009". The "009" is part of the VW part number. The history of that distributor was to provide a "fix" for the engines that came with an oil cooler that blocked air flow to cylinder #3. The theory was that #3 cylinder ran hotter due to less air flow and therefore required a less advanced spark timing (retarded timing). This may have been part of the justification for not putting a vacuum advance actuator (dashpot) on the 009 and just use centrifugal spark advance (which most distributors all have). I also believe that the mass of the governor arms in an 009 provide for a customized spark advance curve (earlier advance?). More weight=lower rpm advance? |
Author: | gregmartin [ Thu Aug 20, 2015 12:10 pm ] |
Post subject: | Re: IGNITION TIMING |
Wow I'm learning something new every day. So I don't have anything to interfere anywhere so I should be OK. THANKS Sent from my iPad using Tapatalk |
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