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Is there more then one type of timing pointer for an RB #1626576 05/29/14 08:28 PM 05/29/14 08:28 PM
Joined: Feb 2009 Posts: 110 Grand Forks, ND cougar_cat_25 OP member
cougar_cat_25 OP member Joined: Feb 2009 Posts: 110 Grand Forks, ND	I put together a 78 smog 440 out of a winnebago. Assembly went well and I double checked cam timing marks. I set the initial timing with a vacuum gauge. The idle timing at best vacuum minus 1 is off the pointer, if I had to guess 40 or more degrees. Runs great and drives great, what am I missing?

Re: Is there more then one type of timing pointer for an RB [Re: cougar_cat_25] #1626577 05/29/14 09:36 PM 05/29/14 09:36 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	I'm rusty on BB's but ain't the timing tab on pass cars at ~10:30 (pass side). Is that where it is at on this eng? I would assume that even if there was different t covers/dampeners that you have the correct ones in your pile for this eng. You might check exact TDC with the ten dollar tool but slipped dampeners are rare but we gotta start somewhere & k.i.s.s. is always a good plan. What's the idle speed? What springs? what was the highest vac and what was the initial before you backed it off 1 in hg of vac?. Whats the total? Keep us posted! I love the toughies live every 24 hour block of time like it's your last day on earth

Re: Is there more then one type of timing pointer for an RB [Re: RapidRobert] #1626578 05/29/14 11:53 PM 05/29/14 11:53 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	I know with a repop front cover on a later car BB my pointer was off ~ 10 degrees. Starting with a truck engine who knows. Best bet is to find true TDC with the positive stop method and go from there. On my stuff, I added a light punch mark and paint dot on the damper at true TDC on the timing marks. Timing tape would be even better.

Re: Is there more then one type of timing pointer for an RB [Re: cougar_cat_25] #1626579 05/30/14 12:35 AM 05/30/14 12:35 AM
Joined: Aug 2003 Posts: 43,191 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,191 Bend,OR USA	Quote: I put together a 78 smog 440 out of a winnebago. Assembly went well and I double checked cam timing marks. I set the initial timing with a vacuum gauge. The idle timing at best vacuum minus 1 is off the pointer, if I had to guess 40 or more degrees. Runs great and drives great, what am I missing? If you didn't verify TDC on your balancer compared to the timing tab your really lost as far as accuracy, aren't you The outer ring on the balancers can, and will, slip and spin You can pull a spark plug(#1 or #6 ) and put in a screw driver or a positive piston stop, and slowly, and gently, turn the motor over until you feel the piston touch the screw driver end, keep rotating the crank, by hand, until the piston reaches TDC and then compare your balancer to the timing tab If you use a piston stop follow the directions for it to locate TDC BTW, there are multiple different timing covers and balancers for the BB Mopars, depending on which year and body style, car, pick up, motor home, industrial or marine Mopar put a small hole in the class A motorhome tranny bell housings and a mark on the torque converter to check the initial ignition timing with the engine cover off on them Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Is there more then one type of timing pointer for an RB [Re: Cab_Burge] #1626580 05/30/14 01:31 PM 05/30/14 01:31 PM
Joined: Feb 2009 Posts: 110 Grand Forks, ND cougar_cat_25 OP member
cougar_cat_25 OP member Joined: Feb 2009 Posts: 110 Grand Forks, ND	The new balancer lined up with the repop cover at TDC, I`ll triple check with the positive stop method. I`m running MSD ignition (standard weights and springs) and Atomic EFI. I plan on locking out the distributor and let the EFI control the timing curve. Could a vacuum leak, say a leaky break booster, mess with initial timing? On top of everything, the passenger side lower hose water pump make it just about impossible to see the timing tab.

Re: Is there more then one type of timing pointer for an RB [Re: cougar_cat_25] #1626581 05/30/14 05:56 PM 05/30/14 05:56 PM
Joined: Jun 2004 Posts: 3,319 Chicago Burbs sthemi master
sthemi master Joined: Jun 2004 Posts: 3,319 Chicago Burbs	Initial timing is set with the vacuum disconnected and plugged. Check the shop manual for correct idle speed to check it at. Motorhome engines use a hole in the bellhousing to check timing. Cast crank engines typically have timing marks on the passenger side of the engine and forged on the drivers side. Video Little Red Wagon Indy Nats,BurnoutContest

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