Autolite 24's?

K

kevsstang

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#1

• Jul 21, 2004

• #1

Where should i gap auto lite 24's

 

408stroker5.0

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Jul 21, 2004

#2

• Jul 21, 2004

• #2

.54 is Ford's recomended Spark Plug Gap For 5.0HO's in Mustang's.
You can go wider if you have an aftermarket coil/ignition system.

 

cjman15

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#3

• Jul 21, 2004

• #3

Sorry for sounding dumb, but how do you gap plugs, and what do you do it for?

 

5spd GT

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#4

• Jul 21, 2004

• #4

I think I have Autolite 24's or 25's not for sure...and was told to gap them to stock gap...(.052-.056) and so I did .054...and I lost 3mph at the track

 

Mustang5L5

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#5

• Jul 21, 2004

• #5

5spd GT said:

I think I have Autolite 24's or 25's not for sure...and was told to gap them to stock gap...(.052-.056) and so I did .054...and I lost 3mph at the track

Click to expand...

3MPH is about 20-30HP. I don't think gapping spark plugs would cause this.

If it is the plugs, you should look at your ignition system. It might not be performing up to spec

 

Mustang5L5

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#6

• Jul 21, 2004

• #6

kevsstang said:

Where should i gap auto lite 24's

Click to expand...

Stock Plug gap for the 87+ Mustangs is 0.052" - 0.056" Stock plugs would be Autolite 25's. The 24's are one heat range colder. You still gap them to stock specs.

The only time you really want to close the gap is if you are running nitrous or boost and the spark keeps blowing out. Otherwise, you want to run stock gap.

If you have an upgraded ignition, you could run wider, but not much.

 

5spd GT

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#7

• Jul 21, 2004

• #7

Mustang5L5 said:

3MPH is about 20-30HP. I don't think gapping spark plugs would cause this.

If it is the plugs, you should look at your ignition system. It might not be performing up to spec

Click to expand...

Here is what I did...cleaned the air filter, replaced fuel filter, cleaned IAB and put in new Autolite 24's or 25's???...gapped at .054...and I lost 3mph two days later at the track...

I noticed after that the rpms did not climb as quick in the upper rpms and was confirmed when I went to the track...it acted like the ports on the heads and lower intake got even smaller...know what I mean?...

 

Mustang5L5

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#8

• Jul 22, 2004

• #8

5spd GT said:

Here is what I did...cleaned the air filter, replaced fuel filter, cleaned IAB and put in new Autolite 24's or 25's???...gapped at .054...and I lost 3mph two days later at the track...

I noticed after that the rpms did not climb as quick in the upper rpms and was confirmed when I went to the track...it acted like the ports on the heads and lower intake got even smaller...know what I mean?...

Click to expand...

When you cleaned your air filter, i take it you reoiled it with K&N oil???

If so, did you let it dry completely before putting it back on?

Check the element on your MAF meter. Some oil might have collected on it. It's pretty common after guys freshly reoil their air filters. Get some electronics spray cleaner and clean the wires.

 

QDRHRSE

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Jul 22, 2004

#9

• Jul 22, 2004

• #9

Yeah....I'm with the guy who says that a 20-30hp drop is unlikely. If your car is very stock you should be using autolite 25's....24's shouldn't hurt though. I gap mine @.050 and .035 on the nitrous car. Were the weather and track conditions the same both times at the track? Not all days are created equal. Temp and humidity can make runs vary by .3-.5 at my local track. Time of day....track conditions...lots of factors.

 

QDRHRSE

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#10

• Jul 22, 2004

• #10

....not likely, but, did you use the right firing order when putting the wires back on? Did you take the dist cap off? If so, is the cap back on securely? Did you have any problems when initially taking the wires off. Sometimes old wires rip/break/seperate when you remove them. Any possiblity ?

 

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kevsstang

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#11

• Jul 22, 2004

• #11

thanks for the info guys.

 

5

5.0guy

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#12

• Jul 22, 2004

• #12

I read in a haynes or chilton manual that 85 or 86-89 are .052-.056 and 90-93 are .045...or somethin like that. there was a cutoff year where coil voltage must've dropped or somethin.

 

Mustang5L5

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#13

• Jul 22, 2004

• #13

5.0guy said:

I read in a haynes or chilton manual that 85 or 86-89 are .052-.056 and 90-93 are .045...or somethin like that. there was a cutoff year where coil voltage must've dropped or somethin.

Click to expand...

Yeah i know what you are talking about. They claim the 86-89 is 0.045 and the 90-93 is 0.052-0.056


They have it wrong. Only the '86 with E6 heads is 0.045". The '87+ is all 0.052-0.056".

On the emmissions label on my '88 (from the factory) it shows to gap the plugs 0.052-0.056

 

maverick0716

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#14

• Jul 22, 2004

• #14

I'm pretty damn sure that the sticker under the hood of my 85 says 0.042-0.046