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#20710 08/18/2003 3:05 AM | Joined: Jan 2002 Posts: 36 Member | | Member Joined: Jan 2002 Posts: 36 | Gentlemen, I read a thread here on setting ignition timming resently , but know I cant find it. Would some one please go over this again. I have allways set it by ear , or sometimes with a light , but for a long time I had my vac. advance disconected. Know I want to go back the way chevy did it origanally. Its a 1957 235 pick up motor. Thanks
Don
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#20711 08/18/2003 6:33 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Just line the needle up with the ball on the flywheel (use the peep hole above the starter). Make sure the 235 is at idle. You shouldn't have any vacuum advance at idle with the correct carb. You don't need to worry about plugging any lines. If you live somewhere where it is on the cool side and you can get high octane gas you can advance the timing a little to get more power but back it off if it pings.
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A lone amateur built the Ark. A large group of professionals built the Titanic. | | |
#20712 08/18/2003 6:54 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Most of the mechanics from that era used a vacuum gauge. I used it on mine, then checked with a timing light and it was dead on.
Fred
52 3600
69 C-10
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#20713 08/18/2003 10:21 PM | Joined: Jan 2002 Posts: 36 Member | | Member Joined: Jan 2002 Posts: 36 | Thanks, that's is pretty much what I remember reeding, but it said to plug vacume advance line. I supose that little bb in fly wheel must already have the corect advance in it. If I were to use a vacume gauge, would I set the timming to its highest vacume reading, or is a certain amount of vacume required to set timming? Thanks again
Don
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#20714 08/18/2003 11:24 PM | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | don,
I have always set the timing to the timing mark (disconnect/plug the vacuum advance line as you state). I then set the carburetor by setting the idle speed to the desired rpm and then adjust the mixture screw at the maximum vacuum reading.
Sequence of tune-up operations:
1. Set points (if new, put in new condensor)
2. Set timing (after turning in the distributor lubricant "cup")
3. Set carburetor
- set idle speed
- set mixture to maximum vacuum (connect to wiper vacuum line)
- recheck idle speed
- recheck mixture
4. Recheck timing
5. Reconnect vacuum advance line
6. Cruise for burgers
This might seem redundant but it works.
Tim | | |
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