307 non computer controlled timing.

[TURNA]

Theres no need to try things that are obviously not correct. I'm curious where you're getting your numbers from TURNA? Did you just pick a number and say 'try this' and not put any real though into it?

Stock base timing with CCC was 20. Total is around 35ish. Most bump this up a couple degrees. Why should it now be much lower than this?

Does he still have the CCC system installed?

 

[DoubleV]

Obviously not.

All he needs to do is roughly mimic the stock CCC timing ( base, computer controlled 'mechanical', and computer controlled 'vacuum' ) using a non CCC distributor and there should be no issues with timing. No need to reinvent the wheel.

 

[DoubleV]

With that said, the op never really stated why he thinks he has a timing issue in the first place....

 

[Jimmy]

It is a stock 307 in a Hurst Olds. I set the timing around 20 but the car will miss and stumble during regular acceleration but runs fine when the car is running at higher rpms which is when vacuum is at a minimum. If I am say coming off the interstate and coasting the car will die sometimes, which leads me to believe that the higher the vacuum is the timing is too advanced. I haven't been able to find a set timing number for a stock 307 not computer controlled which is why I asked the question. I drive it practically every day unless its raining so just want it to run right. I appreciate the help.

 

[fleming442]

EGR

 

[pontiacgp]

EGR

he has removed that.....

 

[DoubleV]

You should only set your base timing to 20 if you recurve your distributor. Until you recurve it, set it to whatever gives you around 36-38 total.

Did you have any issues with your CCC setup before you ditched it? You could have carb issues or vacuum leaks too.

 

[fleming442]

It is a stock 307 in a Hurst Olds. I set the timing around 20 but the car will miss and stumble during regular acceleration but runs fine when the car is running at higher rpms which is when vacuum is at a minimum. If I am say coming off the interstate and coasting the car will die sometimes, which leads me to believe that the higher the vacuum is the timing is too advanced. I haven't been able to find a set timing number for a stock 307 not computer controlled which is why I asked the question. I drive it practically every day unless its raining so just want it to run right. I appreciate the help.

Have you checked for vacuum leaks? If you're pulling too much fuel, it will choke it out. I don't see how it would die with higher advance; the opposite, really.

 

[olds307 and 403]

Unless you are noticing bucking or pinging, it is probably carb related. What is the carb off of? Was it rebuilt?

 

[Jimmy]

You should only set your base timing to 20 if you recurve your distributor. Until you recurve it, set it to whatever gives you around 36-38 total.

Did you have any issues with your CCC setup before you ditched it? You could have carb issues or vacuum leaks too.

The carb needed to be rebuilt and so I decided instead of investing in rebuilding a carb that is 30+ years old and hoping that the computer was still working properly I just replaced it and took the computer out of the equation