On my LG4 i have a distributor with both mechanical and vacuum advance. I have to adjust ignition timing. I what direction do I turn distributor to make ignition earlier/ in advance? Clockwise or counterclockwise??

 

Bird's eye view....

Clockwise to retard
Counter clockwise to advance

You are using a timing light, right?

 

Thanks.

No, no timing-light. I have to do it hillbilly-way (see an other tread) because the timing marks is probably wrong.

I probably have too retarded ignition. But counterclockwise to advance.......?? Ohhhh......I think I only have 1/4 inch left to turn distributor, until the vacuum-unit hits the performer rpm manifold....!
Comments?
I presume (of course?) the vacuum-unit also turns when turing distributor..?

 

Ahhhh....problem solved!

Well, this evening a mechanic and me started working. First he checked current timing with the timing ligth. It was 8 degree at idle (500rpm). He said: Waaaayyy to little. He saw that the clearance between vacuum-unit and the manifold was to small, only 1/4 inch (remember; the workshop I used recently remounted distributor after manifoldgasket-changing).

Well, up with the distributor. He moved it 2 teeth in correct direction (he also had to time a oilpump-link inside at the bottom, too) Now we had about 2 inches clearance. He then told me to start the engine. Then he slowly turned the distributor while he listened to the engine sound. After that he checked the timing with the ligth. It was 25 degree advance. And that would probably be good, he told me. The engine also got a much better sound.

He said: Try it on the road, and return to me after a trip. The car was MUCH better. It didnt stumbled. The only problem was that it was no kick down at full pedal. Then it had to accellerate almost only in 3 og 4 gear, so I couldnt get the correct impression. Well, return to this guy. He quickly checked the kick-down wire. He explained that this wire had to be completely out when throttle pedal was in bottom. Well, it wasnt tight enough! (when I changed carb I set this wire exactly as tight as the workshop did...)
He pulled the wire and fixed it. Okay, try it on the road again. HOLY MOSES! The car accellerated VERY good! Kickdown direct in first gear and it burned away. Ahhhh...finally it works. And tomorrow I will tell the workshop I first used what bad job they did, that costed me time and money.

But what do you think about 25 degree advanced timing? I could hear a little pinging when full throttle at about 2000 rpm in 4 gear. But that was before, at first trip, when kickdown didnt work. I wouldnt say I can hear pinging now In Norway we have 2 choices of gas: 95 octane and 98 octane. I have a mix of those two in the tank. That means that I have the opportunity to fill only 98 octane, IF it need it........ What is the stock spec at timing advance?

 

305TransAm-84:

My '85 z28 wont downshift at WOT it just pulls in third. I was told that the cable does not fully extend. How did you have yours adjusted correctly??? The guy that did my 700r4 trans said that the linkage would have to be extended for the cable to pull out farther.

 

you should try around 34-36 total advance

 

You also need to make sure you've got the vacuum line going to the distributor disconnected and plugged when setting the timing on the vacuum advance distributors.

FWIW, 25 BTDC with the vac disconnected sounds pretty high to me.....

 

Hi Tommy

We pulled the inner wire until it stopped. Then, in this position, we coupled it to the carb-arm/linkage when this was at WOT. Maybe 1/10" clearance.

Then of course, you will have the inner wire pulled complete out at WOT.

It should be quite easy, but maybe there is someone else here who can add more details about this....?

Your last sentence isnt I sure if I understand...(?) If your cable is too short, you will have a problem when you dont touch the throttle(?) Not at WOT...

 

Hi

.....Yes...I know...I have been "searching" this forum since last time

I also posted this tread:

https://www.thirdgen.org/techbb2/sho...hreadid=270710

...where I get a bit deeper into this.

 

305transam:

I think that sentence means that when the throttle linkage on the carb is at WOT, the ccable isnt being pulled out far enough to engage kickdown. The arm on the linkage that holds the cable-end would have to be lengthened or the cable shortened to have it pull out all the way. Is this possible why it wont work?

Also, If I understand correctly, You pulled out the cable all the way, opened linkage to WOT and ?crimped? the wire and connected it to the linkage?? If so, how did you connect the cable to the linkage if the existing connector is on the end of the cable and its currently too long?

Sorry for writing so much, this is driving me crazy though.

 

Hi Tommy z-28

Sorry for late answer:The answer is "Yes" to the first part of your writing. The last question is a bit difficult (or too simple??):

I connect the wire from the gearbox by thigthen the screw witch goes thru the linkage and in a "needleeye". The wire also goes thru this "needleeye". The screw hits the wire and fasten it. Was this unclear? I should have taken a pic of it........if you wait until I buy me a new digitalcamera