Vanning.com logo
Boxdin
Site Navigation


Advertisements
Recent Posts
My shaggin wagon build thread
by Reed. June 26th 2019 8:47 pm
Barn door gullwing(s)
by DontComeKnocken. June 26th 2019 4:47 pm
And it has one pretty window
by Deathorvictory. June 26th 2019 3:19 pm
Bubble windows
by billybob. June 26th 2019 3:05 pm
What Did You do To your Van Today?
by Gladiator. June 26th 2019 1:05 pm
Muffler suggestions for 350 w/ Zoomies?
by Vanereal_Disease. June 26th 2019 12:16 pm
2018 525HP AWD GMC Conversion walk around
by Astrocreep66. June 26th 2019 11:35 am
1987 Dodge B250
by Astrocreep66. June 26th 2019 10:33 am
1995 Chevy G20 Wiper Motor - Fix or Replace?
by MXDUDE. June 26th 2019 10:02 am
78 G30 Pathfinder conversion stuffed into a 92 G30 EWB
by Hairoinn. June 26th 2019 5:45 am
Featured Links
Vanning.Com is a an authorized Amsoil Dealer


Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 2 1 2
Re: 360 Timing with Smog [Re: Deathorvictory] #748770
May 22nd 2019 6:55 pm
May 22nd 2019 6:55 pm
Joined: Aug 2001
Posts: 11,901
Fircrest, WA
Reed Online content
Maniac
Reed  Online Content
Maniac
Joined: Aug 2001
Posts: 11,901
Fircrest, WA
Total mechanical advance on Mopar smallblocks is usually recommended top be 35 degrees. However, without opening up your distributor to see what givernor is in there, I don't know what your base timing should be. The governor has stamped on it the number of crankshaft degrees of advance it provides. But stock governors provide everything from 16 to 30 degrees of mechanical advance.

I would leave it at 10 BTDC and listen for ping. Back it off in 2 degree increments if you hear it knocking.

Depending on the emissions package and application, factory Mopar timing in the 70s and 80s was eveyrthing from 5 ATDC (yes, after TDC) to 16 BTDC. The remanufacture distributors have whatever parts were floating around the assembly line, not the original calibrated parts.


Windows- they're what make a van worth owning!
Re: 360 Timing with Smog [Re: Deathorvictory] #748771
May 22nd 2019 6:57 pm
May 22nd 2019 6:57 pm
Joined: Aug 2001
Posts: 11,901
Fircrest, WA
Reed Online content
Maniac
Reed  Online Content
Maniac
Joined: Aug 2001
Posts: 11,901
Fircrest, WA
Originally Posted by Deathorvictory
It went in the trash on Saturday and Monday was trash pick up. Sorry! Did you go to the Rat Patrol season opener car show? That’s where I was headed with a
Few of my van friends but I couldn’t make it.


Bummer! No worries. My job keeps me pretty busy. I don't ever go to car shows. Between my job, home maintenance, and repairing all the cars in my extened family, I am lucky to get any free time for fun projects.


Windows- they're what make a van worth owning!
Re: 360 Timing with Smog [Re: Reed] #748773
May 22nd 2019 7:50 pm
May 22nd 2019 7:50 pm
Joined: Feb 2016
Posts: 206
Portland, OR
D
Deathorvictory Offline OP
enthusiast
Deathorvictory  Offline OP
enthusiast
D
Joined: Feb 2016
Posts: 206
Portland, OR
Thank you sir! I really appreciate all the helpful info you provide here. My thought is if I plug the vacuum as described, set the base to 10 btdc at idle and then rev the engine to 2000-2500 rpm, I should be getting full mechanical advance to whatever it’s governed and would subtract the base timing to have that number. I can adjust the base idle accordingly if it’s over 35 degrees. I’m hoping atleast that if they are selling these dizzys, then they’d be set up so that they should work with a fairly factory base timing setting.


1979 Dodge B200 Shorty, 1987 B250 Longy
Re: 360 Timing with Smog [Re: Deathorvictory] #748779
May 22nd 2019 11:52 pm
May 22nd 2019 11:52 pm
Joined: Aug 2001
Posts: 11,901
Fircrest, WA
Reed Online content
Maniac
Reed  Online Content
Maniac
Joined: Aug 2001
Posts: 11,901
Fircrest, WA
That sounds right, except some Doddge distributors don't have the timing all in until 3000-3500 RPM. But running it up to 2500 should be close enough.

Aftermarket distributor remanufacturers throw them together with whatever is laying around. No telling what your advance curve is.

You should take the time to map out the curve while you are measuring total mechanical advance. Advance the RPM in 100 RPM increments and note the timing. It might be easier to sent your base timing to TDC when you start this test.


Windows- they're what make a van worth owning!
Page 2 of 2 1 2

Moderated by  Astro, nautic1, Ram4ever 

Donate


Upcoming Events
discovery
Who's Online Now
0 registered members (), 2 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Newest Members
fespado, Tyrus_Tha_Virus, Econovan72, Tryin2fly09, Treevan
10990 Registered Users
Top Posters(30 Days)
NEmery 100
frscke1 55
Forum Statistics
Forums68
Topics35,995
Posts521,474
Members10,991
Most Online177
May 8th, 2013

Powered by UBB.threads™ PHP Forum Software 7.6.1.1