What should the timing be set at?

[90VertGT]

Hey guys I am running:

rebuilt 306
351 heads
B303 cam
shorty headers

What should my timing be set at? My mechanic recently advanced it and it has a lot more power. However, I hear a slight rattling when I accelerate from a dead stop. It goes away as go through the RPM's but it is there at low RPM's. I am guessing this is pinging? I think he advanced it too much and I am looking to set it back a bit. What do you guys think? Thanks.

 

[blk92stangg]

I would advance and retard degree by degree until it runs to you liking. Usually pinging is more prominant under load and higher rpm. Either way, experiment with the timing, as every car is different.

 

[mustangdani]

Timing should be set at 10 deg before top dead center.The engine should be at normal operating temp,with the spout connector disconnected.(you will a timing light to do this).

 

[ECU5.0]

Timing should be set at 10 deg before top dead center.The engine should be at normal operating temp,with the spout connector disconnected.(you will a timing light to do this).

umm...yeah stock timing is 10* btdc. but you can get more power from advancing the timing

 

[shttygtstang]

hey dont wanna jump on your thread but is advaced better for na engines or blown 2.

 

[admstng]

mine is @ 14*... and i always put super in it... it still "pings" everynow and then...


how much HP gains do you guys see with bumped timing?

 

[bock]

a bit of torq for sure, hp ...

 

[drgn5.0]

18 degree's here btdc. NOT stock and no pinging.

 

[Js90Lx]

Advance timing for n/a engines. Blower leave at stock 10 or put it down to 8 degrees. Unless you want to blow something up?

 

[r6bullet]

First of all check to see what he set your timing at, then I would say 12* btdc would be a good place to start

 

[92GTVert]

Most N/A 5.0 engines can handle 14 deg btdc without any difficulty, but some can handle up to 18 deg. As mentioned earlier all engines are different. I would start with 12 deg and advance 2 degrees until it starts to ping and back down a little. Of course, if you use 93 octane fuel you can handle more timing than if you use 89 octane.