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quick 383 timing ???
Racer
Joined: Nov 2001
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From: Huntsville AL
Re: quick 383 timing ??? (kingdavidrules)
Kingdavidrules,
I'm probably not running a big as cam as you but I have found that 14degrees initial-22degrees centrifugal at 2500 rpm gives me 40-52 degrees total centrifugal+vacuum with straight manifold vacuum. I think it is more trial and error depending on your particular set=up.
YBNormal4u...drive a Vette
I'm probably not running a big as cam as you but I have found that 14degrees initial-22degrees centrifugal at 2500 rpm gives me 40-52 degrees total centrifugal+vacuum with straight manifold vacuum. I think it is more trial and error depending on your particular set=up.
YBNormal4u...drive a Vette
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Racer
Joined: Jul 2002
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From: bklyn ny
Re: quick 383 timing ??? (Ybnormal)
the reason i was wondering was that my mechanic was unsure due to not having done many applications of this nature. we figured that the engine ran best at 15 degrees but i was told by many others that it schould be at 5 degrees . thanks .
Drifting
Joined: Jun 2000
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Re: quick 383 timing ??? (kingdavidrules)
What heads are you running?
The reason I ask is that heads with less efficient, slower burning combustion chambers need more advance when compared to fast-burn or Vortec heads. My cast iron 882 heads with mild port work seem to like alot of advance. I wouldn't go over about 15 initial. Make sure the vacuum advance port is disconnected and plugged. The most important thing is to make sure you aren't causing detonation due to too much advance, this will kill your engine and reduces HP. Other than that you just have to play with it to see what feels right.
Jeff
The reason I ask is that heads with less efficient, slower burning combustion chambers need more advance when compared to fast-burn or Vortec heads. My cast iron 882 heads with mild port work seem to like alot of advance. I wouldn't go over about 15 initial. Make sure the vacuum advance port is disconnected and plugged. The most important thing is to make sure you aren't causing detonation due to too much advance, this will kill your engine and reduces HP. Other than that you just have to play with it to see what feels right.
Jeff
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From: Living in the Hartland
Re: quick 383 timing ??? (kingdavidrules)
as far as i know there dart 2 heads . i was told there aluminum . how do i "Make sure the vacuum advance port is disconnected and plugged"?
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From: Living in the Hartland
Re: quick 383 timing ??? (kingdavidrules)
Is that a vac hose line? Looks like vac hose ends with a cable in the middle. Have to admit never seen one like that but it might be standard equip. And yes that is what you are looking for. Pull it off the carb and plug that port. That is done so there is no way the dist is getting any advance from the vac adv unit. Would also suggest grounding your choke to your heads, block or frame. I personally do not like any elec stuff grounding to the carb since it is full of gas. :eek:
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From: Living in the Hartland
Re: quick 383 timing ??? (kingdavidrules)
im not sure which one is the vaccum . this hose is connected to a pipe that sits besides ( runs parallel to ) the transmission dipstick.
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Racer
Joined: Jul 2002
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From: bklyn ny
Re: quick 383 timing ??? (Fevre)
the black wire correct? 
concerning the ground wire ; i was to to place a fuse on it the yellow arrow represents the wire connected to the neg and fuse. 
[Modified by kingdavidrules, 4:36 AM 9/18/2002]
concerning the ground wire ; i was to to place a fuse on it the yellow arrow represents the wire connected to the neg and fuse. [Modified by kingdavidrules, 4:36 AM 9/18/2002]
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From: Living in the Hartland
Re: quick 383 timing ??? (kingdavidrules)
Yes that is the vac adv line you have circled and the arrow pointing to the connection at the carb is the one you want to pull off the carb fitting.
As for the elec choke, just unhook the short white wire and relace it with one that bolts to the engine, heads or frame. I was going to hook my elec choke up the same way until I saw tiny sparks come from my ground wire when touching it to the carb and thought that might not be the safest place to ground it.
As for the elec choke, just unhook the short white wire and relace it with one that bolts to the engine, heads or frame. I was going to hook my elec choke up the same way until I saw tiny sparks come from my ground wire when touching it to the carb and thought that might not be the safest place to ground it.
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From: Living in the Hartland
Re: quick 383 timing ??? (kingdavidrules)
That sould work. I am running my car without vac advance hooked up since I keep getting a jerky feel at cruising speeds when it is hooked up. I need to get an adj one to allow me to tailor it to my engines needs. Once you have the timing set you can rehook up the vac line and see if it causes any jerky feel at cruise or pinging.
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Racer
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From: bklyn ny
Re: quick 383 timing ??? (Fevre)
just recently i had my mechanic use a timing light ; he set it to 15 over, claiming that it sounded right at that position , moved from 10 degrees . i have never heard any pinging but i was never able to give full throttle . it seemed as if full throttle choked the engine . at half throttle the car is a beast , anyone who has been a passenger has voluntarily put thier seatbelt on and grabed the door handle to hold on for dear life as i only gave half of what this puppy is capable of.