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spark plug gapping on trick flow heads

  • Thread starter Thread starter 1992mustangLX
  • Start date Start date Jun 26, 2007
1

1992mustangLX

New Member
Jun 13, 2007
65
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0
Jun 26, 2007
#1
  • Jun 26, 2007
  • #1
i bought the trick flow top end kit with the twiated wedge heads and wanted to know what to gap the plugs at when installing them. I bought the ngk fr5 that are recommended for the heads. Thanks and appreciate the help!
 

ShortThrow50

Member
Oct 22, 2006
923
2
16
Pa
Jun 27, 2007
#2
  • Jun 27, 2007
  • #2
1992mustangLX said:
i bought the trick flow top end kit with the twiated wedge heads and wanted to know what to gap the plugs at when installing them. I bought the ngk fr5 that are recommended for the heads. Thanks and appreciate the help!
Click to expand...

There was a list of diff plugs. I went with the autolite 3924's because others suggested them. Anyway, a plug is a plug. I kept them at the gap they came with. it was .34. I checked them all regardless to make sure they were the same. Some people change the gaps but I have been having zero issues. I too will check back to see what others are running.
 
1

1992mustangLX

New Member
Jun 13, 2007
65
0
0
Jun 29, 2007
#3
  • Jun 29, 2007
  • #3
thanks for your input and sorry for the late reply. Ya i got the plugs and they are gapped at .35 ..im wondering if should keep them all at that or does anybody else have any other opinions?thanks
 

04sleeper

Founding Member
Jun 22, 2002
2,674
14
89
Dallas, TX
Jun 29, 2007
#4
  • Jun 29, 2007
  • #4
If you are running N/A then I would go with .045 gap.
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
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99
Arkansas
Jun 29, 2007
#5
  • Jun 29, 2007
  • #5
Widen the gap too as much as your ignition can spark it...N/A.

.045 would be a good starting point

.035 is for boosted/nitroused cars with extra 'compression' that could blow the spark out...

In short, N/A at .035 you could be leaving a bit of power on the table...
 

ShortThrow50

Member
Oct 22, 2006
923
2
16
Pa
Jun 30, 2007
#6
  • Jun 30, 2007
  • #6
5spd GT said:
Widen the gap too as much as your ignition can spark it...N/A.

.045 would be a good starting point

.035 is for boosted/nitroused cars with extra 'compression' that could blow the spark out...

In short, N/A at .035 you could be leaving a bit of power on the table...
Click to expand...

good info. So I should pull my plugs and gap them to .45? Im running 18 degrees of timing. this .45 gap wont give me detonation will it? What will I gain
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Jun 30, 2007
#7
  • Jun 30, 2007
  • #7
ShortThrow50 said:
good info. So I should pull my plugs and gap them to .45? Im running 18 degrees of timing. this .45 gap wont give me detonation will it? What will I gain
Click to expand...

I know it is kind of a pain and time consuming, but regapping your plugs wider would be more ideal.

There is no set gain, but I imagine you could see a few hp/tq across the board, and then again you may see nothing, but it is the 'potential' of leaving power on the board.

There is just no reason to keep them closed that much if your ignition can handle the extra gap and 'jump' the spark...

You will now if you gap it too far because you will get a miss more than likely...

If you are ever bored, give it a shot
 

ShortThrow50

Member
Oct 22, 2006
923
2
16
Pa
Jun 30, 2007
#8
  • Jun 30, 2007
  • #8
5spd GT said:
I know it is kind of a pain and time consuming, but regapping your plugs wider would be more ideal.

There is no set gain, but I imagine you could see a few hp/tq across the board, and then again you may see nothing, but it is the 'potential' of leaving power on the board.

There is just no reason to keep them closed that much if your ignition can handle the extra gap and 'jump' the spark...

You will now if you gap it too far because you will get a miss more than likely...

If you are ever bored, give it a shot
Click to expand...

Thanks bro
 

jhonda

Member
Jul 22, 2003
125
1
16
Huntersville NC
Jun 30, 2007
#9
  • Jun 30, 2007
  • #9
The wider the gap will also help out with your gas mileage not by much but it will give a more efficent burn
 
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