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'74 318 LA Factor Timing

  
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'74 318 LA Factor Timing

 
64Valiant200convV8 64Valiant200convV8
New User | Posts: 43 | Joined: 10/08
Posted: 02/13/09
11:50 AM

I've got a '74 318 LA that is all factory with a factory intake and 2 bbl factory carb.  I need to know what the factory timing should be?  Right now it runs fine and it reads 20 BTDC!!!  Timing chain is new and set right.  Damper has not spun.  Can the distributor be off a tooth?  

marcohotrod340 marcohotrod340
Enthusiast | Posts: 459 | Joined: 09/08
Posted: 02/13/09
04:24 PM

good question. this is 2009, the factory timing is not what you want (for 150HP 318 and 170HP 318 HP 0 btdc, set at tdc ? crazy today , this was for emission reasons ) 20 btdc for a 8.5:1 static compression ratio engine sounds about right. the absolute correct timing for every engine is whatever it runs best at, 15,17,19,21 btdc at idle. the next step is to check total timing (what the advance=at around 5000 rpm) around 33-37 . the distrib is not off a tooth, on any engine if you have enough clearance to rotate the distrib back and forth to adjust it to where it runs best you are good.  

marcohotrod340 marcohotrod340
Enthusiast | Posts: 459 | Joined: 09/08
Posted: 02/17/09
09:04 PM

1 question, U know these numbers are without adding any vacuum advance, right.  

64Valiant200convV8 64Valiant200convV8
New User | Posts: 43 | Joined: 10/08
Posted: 02/18/09
09:09 PM

My vac advance is disconnected.  Runs real bad with it.  I have not been able to see the timing mark since this is a 318 with PS crammed in a 64 valiant.  I have now added timing marks on the pass side and when reading off the #2 spark can finally mess with the dist to see what happens when its adjusted.  Might sound rigged but its all I can think of for now.  I hope to now get it running its best and eventually get the vac advance working.  Thanks for the help.