91Vert

I got a 91 GT with a 95 5.0 with gt40 heads and intake. It sounds like it has a bad spark knock during acceleration and sometimes it's hard to crank. I checked for vacuum leaks and didn't find any. I don't have a timing light since I've never had a use for one. So I'll have to get one to see what the timing is set at.

What's the suggested timing and plugs to run in this?

AdderMk2

stock timing is 10°, I like being between 12-14 on a mostly stock engine.

and run Autolite 764 copper plugs

91Vert

Thanks! Could you lay down the process of setting the base timing? Newb to 5.0's

91Vert

I did a bunch of searching. I found the firing order. But I don't know what the spout is. I'm going to replace the plugs with the 764's tomorrow. I seen that you can lock in the timing by keeping the spout out. I also don't know what TFI is.

I'm a ls1 guy, no dizzys for me. It's all computer COP shiza. Thanks for the help.

AdderMk2

dont lock your timing out.

and look in the tech articles, it will show you how to set your timing.

91Vert

thanks! Here it is: https://mustangforums.com/forum/5-0l...y.html#1531258

I'll give this a shot once it warms up and I change the plugs.