timing question
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New User
Joined: Sep 2003
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timing question
I was just wondering what the best timing setting would be (best fuel milage/power without causing damage) for my balanced 460 9:1 compresion, RV cam, 750 electric choke edlbrock, wiend stealth aluminum intake. Your pinions and suggestions are much apreciated!
New User
Joined: Sep 2003
Posts: 13
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From: Carrollton, VA
i recently bought my 1979 e350 trailer special witha 460.. advance was set to about 0.. (eep!) i moved it to 12 but it pings a little sometimes when i get on it.. what grade of gas do you guys run? I was running the cheap stuff... last fill i put 89 in to see if it makes a diff.. still waiting to see.
dale
dale
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Senior User
Joined: Jun 2003
Posts: 127
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From: Salida , Colorado
I was running 87 octane until I did my Buildup. It ran ok,but on 91 octane I was getting better performance and fuel mileage.
Now I run only 91 in my truck. Gets spendy sometimes but I feel it is worth the extra mileage and power.
Larry
1984 F250 4x4 w/460
1982 Mustang GT
1993 Explorer 4x4
Now I run only 91 in my truck. Gets spendy sometimes but I feel it is worth the extra mileage and power.
Larry
1984 F250 4x4 w/460
1982 Mustang GT
1993 Explorer 4x4
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Laughing Gas
Joined: Apr 2003
Posts: 837
Likes: 2
From: Minnesota
Before I had my distributor recurved I would get pinging under load @ 12* unless I ran mid-grade fuel. After the recurve I could run anything without problem.
The guy who did the work said rebuilts are usually mismatched because of the variety of applications and seldom are the springs and weights correct. I provided him with engine rpm's, vacuum readings, speeds, fuel information along with a bunch of other stuff and he set the timing curve to match my needs.
We did a 2,600 mile trip to Colorado towing our 5th wheel this last July running altitudes from ~600 to over 10,000' and used octanes from 85 to 91 with no problems, no pinging and lots of power.
A performance matched recurve is well worth the time and money. I've got a good ignition service I can recommend in the Mpls-St Paul area if anyone is interested.
The guy who did the work said rebuilts are usually mismatched because of the variety of applications and seldom are the springs and weights correct. I provided him with engine rpm's, vacuum readings, speeds, fuel information along with a bunch of other stuff and he set the timing curve to match my needs.
We did a 2,600 mile trip to Colorado towing our 5th wheel this last July running altitudes from ~600 to over 10,000' and used octanes from 85 to 91 with no problems, no pinging and lots of power.
A performance matched recurve is well worth the time and money. I've got a good ignition service I can recommend in the Mpls-St Paul area if anyone is interested.
Post Fiend
Joined: Sep 2000
Posts: 8,238
Likes: 3
From: Oregon
I actually run mine at 17 initial. Allot I know, but I run top grade fuel and my dizzy's curved for my motor. What I recomend to most folks asking this question is to put it at 10btdc, see if it pings under load with the fuel you run...then try another two degrees...if thats still good then another two, etc.
Mountain Pass
Joined: Mar 2002
Posts: 141
Likes: 20
re-curve info needed
Hey ClydeSDale, I would like the info on the shop that did your recurve. Mine was pinging bad at 11.Mine also goes to like 24 degrees at like 1500rpm, seems too much to me, anyway I would like to get it recurved. Thanks!
New User
Joined: Sep 2003
Posts: 13
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From: Carrollton, VA
Originally posted by lxman1
I run 87 octane @ 12 degrees. No problems. I also do run the vacuum advance on ported vacuum, not manifold vacuum.
Jimmy
I run 87 octane @ 12 degrees. No problems. I also do run the vacuum advance on ported vacuum, not manifold vacuum.
Jimmy
dale