Ignition Retard

[6bblflash]

Originally Posted by sg1586

Tell me why you need to retard only a couple of cyd????

Poor flow in #4 runner,causing detonation.
probably just going to change compression in that cyl.,but was looking for alterantive.

[Tony Curcio]

Before there were programmable boxes, the NASCAR engine builders would bend the tangs on the distributor reluctor for the cylinders they wanted to retard or advance, then check the results by putting a timimg light on each cylinder. I guess it was trial and error until they got the right amount of change.

[astikhossw]

Why not just put a hotter or colder plug in that cylinder.

[sg1586]

Poor flow??? What cyd's and whats the firing order Ford,Chevy??Are you using a carb?? If it's lean in those cyds would more fuel help?? This can be done..

[6bblflash]

Originally Posted by sg1586

Poor flow??? What cyd's and whats the firing order Ford,Chevy??Are you using a carb?? If it's lean in those cyds would more fuel help?? This can be done..

440 Mopar,Edelbrock 6bbl intake. Of course Holley 2300 carbs.
1-8-4-3-6-5-7-2
Only #4 breaks the plug.

[Adger Smith]

Put a colder, non extended tip plug in it.
If you are using a stock dist. I think PPPC sells a dist. relucter (SP) that has bendable legs.

[Tom Simon]

It's been 6-7 years since I read the sale literature when it first came out, but I am 95% certain I remember MSD's Digital 7 does exactly what you are asking for... individual advance/retard by individual cylinder.