to 12 degrees. The truck has that extra kick I was looking for. I love it!

Should I change the gas to mid range or premium??

Thanks,

Pete

 

Only if it's pinging. The best octane you can use is the lowest you can without causing detonation.

Take care,
~Chris

 

Put some Premium in it and crank it up to 14 degrees.

PKRWUD, I always heard that the distributor only controls "initial spark" whatever that is, on the 92-96 F-150s because the computer controlled the rest of the timing.

 

See, told you it was a piece of cake! I agree with beastie, more timing will allow you to utilize premium fuel and get some additional performance. Remember, Ford timed for emissions, not performance. It won't be enough to smoke the hides off, but you should notice a little snappier throttle response and acceleration. I run Amoco 93 octane (clear gas) in all my vehicles. My 93 F150 & my 89 5.0 mustang both are set at 15 degrees initial. Enjoy!

 

Yes! Guys do what he says. Your best gas is the gas with the lowest octane.

I'm running 14degrees and don't have any ping on regular unleaded 87 octane. With a fresh tune-up 16 degrees is possible on 87 octane, with some engines. Its a try it and test it kinda thing as you know.

 

We're probably just pissing in the wind here. Some guys don't want to know the truth.

Take care,
~Chris

 

The ECM ASSUMES that the distributor is set so that the base timing is at 10 degrees. if you advance it with the spout connector removed, to say, 14 degrees, the ECM will still think you're at 10 degrees when the spout is replaced, so your timing will be 4 degrees advanced throughout the curve.

Take care,
~Chris

 

I got ya. I would advance my timing, but I have no idea how high my timing is advanced by the chip. I do have ot run premium with the chip, so maybe it really advances it. I am sure I could goto 12 or something and be fine.

 

Only one way to find out!



Take care,
~Chris

 

14 degrees on 87 pump gas on my 302.

From what I have seen generally the speed density trucks will tolerate slightly more timing as a rule of thumb. I'm sure the various calibrations will affect this as well.

There are two places where a ping will occur when I push the limits of timing. Heavy load under moderate throttle, such as letting the truck short shift into second under heavy load, and then if manually shifting and letting the truck remain at higher revs before stopming it.

One is timing, the other is obviously fuel.


Just curious as to what others have experienced with shifts. On my truck, shifts are much firmer under light to moderate throttle with the timing advanced. I assume that the extra timing helps overcome the shift retard and firms them back up. They may be slightly better at WOT and letting the revs rise, but nothing to get excited about.

 

I'm not sure if mine shifts firmer or "harsher." Since I've eliminated my ping due to the wires, and added exhaust kit, I've been driving the snot out of my truck. The previous owners towed young cattle with it for agricultural shows and fairs, so mine might be getting tired.

I dislike automatics big time but this one is pretty rugged. It hasn't let me down despite the abuse I give it.

 

I have seen text stating :

4 degrees advance is equivalent to 20HP

Never go over 6 advance

Each degree is ONE 1 octane point

 

Well, those are all wrong. First of all, there is no across the board system, even for identical engines. There are so many factors that affect things, that's simply not possible.

I know a guy here locally that runs 87 octane gas in his 5.0 Mustang, with his timing advanced to 18 degrees.

I'd stop reading where ever it was you saw that.

 

It was on a site about installing blowers and setting them up