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Username Post: engine turns over hard with advance timing.        (Topic#368345)
jbander 
Newbie
Posts: 47

Reg: 07-19-19
05-05-22 10:24 AM - Post#2840741    

I've read that you can run a toggle switch to the 12 volt source going into a hei distributor and since it will only turn over without firing it turns over easier and faster , and then you flip the toggle and it starts. Has anyone had any experience with this . It's a 355 with maybe 450 HP.
Is there anyway to adjust timing inside of the car , that doesn't cost a lot of money



 


Shepherd 
Valued Contributor
Posts: 2581

Loc: Lake George, NY
Reg: 11-11-15
05-06-22 10:17 AM - Post#2840781    
    In response to jbander

No info here to work with! What is the base timing, what is your compression ratio, are all the cables clean and tite, have you confirmed the starter is in good working condition, does this happen hot or cold?



 
jbander 
Newbie
Posts: 47

Reg: 07-19-19
05-08-22 12:20 PM - Post#2840885    
    In response to Shepherd

Did you read what I asked about?



 
Shepherd 
Valued Contributor
Posts: 2581

Loc: Lake George, NY
Reg: 11-11-15
05-08-22 01:38 PM - Post#2840893    
    In response to jbander

Yes, of course, it seems like you are describing a hard start or slow cranking condition work around, no? And no, from inside the car you would need a sophisticated timing control module with a matching distributor.



Edited by Shepherd on 05-08-22 01:41 PM. Reason for edit: No reason given.

 
jbander 
Newbie
Posts: 47

Reg: 07-19-19
05-08-22 07:43 PM - Post#2840908    
    In response to Shepherd

Well then it will be the switch, it has been done many times and I've found help in the wiring .



 
IgnitionMan 
Valued Contributor
Posts: 3969

Reg: 04-15-05
06-23-22 02:27 PM - Post#2843272    
    In response to jbander

Novel idea, why don't you fix it right?

Obviously, some dyno hero, Top Fuel for the street tuner has conned the engine into way too much initial timing, with no start compensation.

Of course, this all depends on if the engine is set up correctly with a functional VACUUM ADVANCE. If not, you are done, locked out timing, done, no fix.

Now, how to do it right.

A degrees stop needs to be added to the vacuum advance pull pin, to limit the IDLE timing, and allow less INITIAL timing for fire up.

A simple stop can be fabricated to stop the pull pin on the vacuum advance, so it only travels .086 inch, for 8 degrees, .110/,112 for 10, .130 for 12 degrees.

Read that you are stopping the pull pin on the advance from traveling past the degrees you wish, NOT pushing it into the diaphragm.

Once the degrees stop is fabricated, and installed, you are ready to time the engine at a more reasonable INITIAL timing, say, 14 degrees. Then, add the vacuum advance to full manifold vacuum, and lets say it is configured to add 10 degrees.

The engine fires and starts at 14, and just after start, the IDLE timing goes to 14 INITIAL, and 10 VACUUM added, 24 IDLE degrees.

Of course, no vacuum advance to work with? Have fun playing with it, it will never come around to working right.



 


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