Timing = overheating ??
Thread Starter
Racer
Joined: Feb 2003
Posts: 331
Likes: 0
From: El Cajon CA.
Timing = overheating ??
65' Vert, rebuilt 327/365 w/90 miles on it. Noticed the temp gauge up to about 220 when I got home after driving 20 miles in stop and go traffic. Total timing is set at about 34 degrees. Is there some tweaking of the timing I can do to make this thing run a little cooler?? 
Thanks for any help.
Thanks for any help.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
on my '65 L76 the timing is pretty much at factory settings - 12º initial and 36º total timing with the vacuum adv disconnected and plugged, then reconnecting the vacuum advance adds another 16º on top of that. Mine runs steadily at idle, around town, or highway driving at 185º-190º. Make sure the vacuum advance is connected to full manifold vacuum. If you have the correct Holley 2818 carb the vacuum nipple available is full manifold vacuum but if you have a different replacement carb you may have both full and ported vacuum connections so make sure it's on a full manifold vacuum source.
Team Owner
Joined: Aug 2007
Posts: 58,061
Likes: 7,145
Army
Its been stated on here a bunch but those old sending units are notorious for being off (way off in some cases)....get an I/R temp gun and take a reading at the T-stat housing. If its off I'm told the Autozone Wells TU-5 is the closest, most accurate replacement.
Thread Starter
Racer
Joined: Feb 2003
Posts: 331
Likes: 0
From: El Cajon CA.
Thanks for the replies, I'll check all those things. The vacuum is hooked up to the original tube, the carb is a rebuilt 2818. I'll have to try and get it dialed in. There aren't too many guys left who can get these cars dialed in by sound and feel. I knew one when I was a teenager, and he would help all of us kids with our cars. 
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
Thanks for the replies, I'll check all those things. The vacuum is hooked up to the original tube, the carb is a rebuilt 2818. I'll have to try and get it dialed in. There aren't too many guys left who can get these cars dialed in by sound and feel. I knew one when I was a teenager, and he would help all of us kids with our cars.
Set your dwell than your timing with the dwell meter and timing light.
use the vacuum gauge to set correct idle fuel mixture on the carb.
Team Owner
Joined: May 2006
Posts: 37,663
Likes: 1,112
From: CA
if you have teflon tape on your sending unit remove it...i have a napa sending unit in mine its within 20 degrees of my ir gun "190-200Deg."...i tried one from my local chevy dealer and it was of 30 degrees...
jack
jack
Tech Contributor
Joined: Jun 2004
Posts: 20,864
Likes: 960
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Buncha good advice above. One additional item. Make sure your vacuum advance is actually working. I've run into a couple over the years that finally just failed. Make sure you see the timing actually change when you plug the hose back on.
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Le Mans Master
Joined: Mar 2005
Posts: 7,631
Likes: 11
From: Rocklin California
65' Vert, rebuilt 327/365 w/90 miles on it. Noticed the temp gauge up to about 220 when I got home after driving 20 miles in stop and go traffic. Total timing is set at about 34 degrees. Is there some tweaking of the timing I can do to make this thing run a little cooler??
Thanks for any help.
Thanks for any help.
Le Mans Master
Joined: May 2008
Posts: 5,605
Likes: 14
From: MA
larry
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
wow, that sucks. We can get 93 everywhere around here and one station about 7 miles from me even sells 100LL racing fuel.
Le Mans Master
Joined: Mar 2005
Posts: 7,631
Likes: 11
From: Rocklin California
You can open a few stations out here and make a killing with 93+ octane. I have a feeling it's because of all the California environmental laws.
The most I can find in Norther California is 91.
