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jrob83046
Samba Member
Joined: July 09, 2015
Posts: 146
Location: Pineville, La.
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 Posted: Sun May 19, 2019 9:06 am Post subject: Timing question |
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| A friend of mine has a 73 beetle. Has a larger crank and some kind of a cam. It has a 009 distributor, 34 pic carb. Has has a lot of trouble making it run. He told me he static timed it at 10btdc. He said when he cranks it it idles at 30 degrees btdc but runs fine. What could cause this. He changed the distributor. When it was idling the timing was jumping around. Someone told him it was the distributor so he changed it along with the coil. Any suggestions. Thanks |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76902
Location: Sneaking up behind you
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| Posted: Sun May 19, 2019 9:15 am Post subject: Re: Timing question |
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| jrob83046 wrote: |
| It has a 009 distributor |
You time a 009 to 28-32* BTDC @ 2500rpm
| jrob83046 wrote: |
| Has a larger crank and some kind of a cam. It has a 009 distributor, 34 pic carb. Has has a lot of trouble making it run. |
A few things:
Larger crank and cam? Can you be specific?
A 34PICT-3 on a stroker engine with a cam is like running a marathon wearing a gas mask.
A 009 is a very bad match to a 34PICT-3.
Sounds like someone has a really bad engine combo.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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StefansBus
Samba Member
Joined: November 20, 2015
Posts: 242
Location: Germany
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| Posted: Sun May 19, 2019 11:59 am Post subject: Re: Timing question |
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Not nearly enough information. A 009 can run ok with a 34 PICT.
A friend has a 1776 with a 39 PICT and runs a 123 dizzy without vacuum advance and he is very happy with it.
Hang said that, we need to know bore/stroke and cam as a minimum. Glenn is right that too much cam doesn't work well with a single carb. But something like a W100 for example could work ok.
It's also strange that a static timing of 10 degrees BTDC should result in 30 degrees BTDC at idle. Something is very wrong. You write he changed the distributor. Is it still doing the same? If so, then I suspect there is a problem with how he measures his timing. |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Sun May 19, 2019 12:33 pm Post subject: Re: Timing question |
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The engine has a 286 duration cam or larger, and the 34-3 carburetor won't idle with that much overlap.
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Last edited by [email protected] on Sun May 19, 2019 8:31 pm; edited 1 time in total |
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StefansBus
Samba Member
Joined: November 20, 2015
Posts: 242
Location: Germany
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| Posted: Sun May 19, 2019 1:34 pm Post subject: Re: Timing question |
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So it "idles" at 2500 RPM? That would explain the ignition advance at "idle".... 
On the other hand: 276 degrees is what a W100 and a CB2239 have and those idle ok with a 34 PICT. In fact mine idles perfectly at around 950 RPM with a CB2239. |
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ekacpuc
Samba Member
Joined: December 08, 2010
Posts: 1414
Location: ketchikan alaska
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| Posted: Sun May 19, 2019 2:52 pm Post subject: Re: Timing question |
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| StefansBus wrote: |
So it "idles" at 2500 RPM? That would explain the ignition advance at "idle"....
On the other hand: 276 degrees is what a W100 and a CB2239 have and those idle ok with a 34 PICT. In fact mine idles perfectly at around 950 RPM with a CB2239. |
I’m not sure if the first part is a joke. I know if I was new and asked what the op asked what you said would confuse me.
Also idles “okay” is subjective. I’ve dealt with people who have vehicles that they say runs great but really they have a dead cylinder.
To the OP: what Glenn is saying is set full advance to 28-32 degrees. Each 009 I’ve dealt with is different but you can rev it with a timing light and see where it stops advancing and set that at the advance that you want.
I used a protractor to put 28 and 34 degree marks on my pulley before I had one with the degree marks. |
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StefansBus
Samba Member
Joined: November 20, 2015
Posts: 242
Location: Germany
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| Posted: Sun May 19, 2019 8:14 pm Post subject: Re: Timing question |
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| ekacpuc wrote: |
| StefansBus wrote: |
So it "idles" at 2500 RPM? That would explain the ignition advance at "idle"....
On the other hand: 276 degrees is what a W100 and a CB2239 have and those idle ok with a 34 PICT. In fact mine idles perfectly at around 950 RPM with a CB2239. |
I’m not sure if the first part is a joke. I know if I was new and asked what the op asked what you said would confuse me.
Also idles “okay” is subjective. I’ve dealt with people who have vehicles that they say runs great but really they have a dead cylinder.
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Trust me, my 1776 with a 34 PICT and a 276 degree cam (CB2239) idles and runs great. It was designed by Alstrup. I rest my case 
Oh, and the first part. Well, was it a joke? Yes and no. The OP confuses the hell out of me. Here is the original post again with my comments:
A friend of mine has a 73 beetle. Has a larger crank (what size?) and some kind of a cam (what cam exactly?). It has a 009 distributor, 34 pic carb. Has has a lot of trouble making it run. He told me he static timed it at 10btdc. He said when he cranks it it idles at 30 degrees btdc but runs fine. This is the part that confuses me: He sets it to 10 but it idles at 30 degrees? Either there are no springs in the 009 and it goes straight to max advance as soon as the engine starts or it idles at 2500 RPM...What could cause this. He changed the distributor. When it was idling the timing was jumping around. Someone told him it was the distributor so he changed it along with the coil. So he changed the dizzy and coil to try and fix the problem? Or he has the problem since the swap? Or he had it before the swap and since? What kind of dizzy before the swap, and what kind now? I just can't make any sense of the OP Any suggestions. Thanks |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Sun May 19, 2019 8:30 pm Post subject: Re: Timing question |
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I typoed the #, I meant 286 duration (W110+).
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nsracing
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Joined: November 16, 2003
Posts: 9462
Location: NOVA
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| Posted: Thu May 23, 2019 2:49 am Post subject: Re: Timing question |
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A friend of mine says the engine runs fine but zero compression on a cylinder. AFter, a valve adjustment still zero compression. so I said blown cylinder or piston or both.
Tore it down and showed him the picture. 
2500 RPM idle, huh? |
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