.054 Spark Plug Gap Missfire

[99cobra09]

I just did the spark plugs and i have always ran the gap at .045, well i did them this time at .054 and theres a miss when the engine is in load. Most of the people here runs them at factory gap but i guess mine dosent like it, this isnt normal is it. Is it because im running a higher compression 10.1?

 

[qwik01cobra]

.45 or bust on N/A car

 

[IUP99snake]

I had a similar problem. I had plugs that were gapped at .54, and I had a real bad misfire in the higher RPM's. I gapped em down to about .37 and it fixed them! With an N/A car you might not need to gap them that small. .45 for an N/A car sounds about right.

Homer

 

[Chris _Scott]

funny, i was having misfirings from gaping mine too small..they were at like.. .027

 

[99cobra09]

funny, i was having misfirings from gaping mine too small..they were at like.. .027

.027 is for like FI applications!

What do you run them at now?

 

[na svt]

Autolite 754s, .54" gap with 10.8 to 1 here, no problems.

 

[Chris _Scott]

.027 is for like FI applications!

What do you run them at now?

Yup, they came out of another car and just tossed them in [I was just making sure that the spark plugs I had weren't bad]

I recently just pulled them out now, and they're gaped around .040, I will be spraying nitrous.

 

[99cobra09]

.040 i think is a good gap for nitrous, how much are you spraying?

 

[Chris _Scott]

I am not spraying yet..but I will only be spraying a 75-shot, if that. Because I am still on a stock shortblock, so after the carb and spray I'll be at 460-475ish to the wheels.

On the new shortblock.. 100-150 and will gap them closer for that.

I have the nitrous kit just chillin in my room, waiting for my carb'd swap to get done so I can put it in!

 

[99cobra09]

You definately have to make a thread of you carb swap, not many people go with that route but its going to be interesting!

 

[19984V]

I am not spraying yet..but I will only be spraying a 75-shot, if that. Because I am still on a stock shortblock, so after the carb and spray I'll be at 460-475ish to the wheels.

On the new shortblock.. 100-150 and will gap them closer for that.

I have the nitrous kit just chillin in my room, waiting for my carb'd swap to get done so I can put it in!

I have my nitrous kit sitting in my room on the floor too! ;P Need it put in -.- I don't trust myself doing it lol.

 

[99cobra09]

Nitrous is one thing that you really have to know what your doing. its very tricky!

 

[Brutal Metal]

a couple of the Die hard guys here ( na svt and Quad) say .054, I've never ran any Stang with a gap that Big even with an MSD box, I'm at .048 now!