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spark plug gap

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Old Apr 11, 2011 | 05:05 PM
  #1  
TPI-Formula350-'s Avatar
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
spark plug gap

I'm currently running .035 gap on my plugs. Just curious If I'd be better off running more gap? Mods in sig.
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Old Apr 11, 2011 | 07:05 PM
  #2  
TPI-Formula350-'s Avatar
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Joined: Aug 2003
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: spark plug gap

being I just put MSD 6AL in the car I think I'm going to try .045
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Old Apr 11, 2011 | 07:14 PM
  #3  
james.gould150's Avatar
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From: Mays Landing, NJ
Car: 1991 z28
Engine: 305 tpi
Transmission: 700r Automatic
Re: spark plug gap

Originally Posted by TPI-Formula350-
being I just put MSD 6AL in the car I think I'm going to try .045
with the msd i think your supposed to start at .050 and work your way up ? and a side note how is it working for you do you think it was worth the 200 or so $$ ive been up in the air about getting one myself
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Old Apr 11, 2011 | 07:36 PM
  #4  
TPI-Formula350-'s Avatar
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Supreme Member
 
Joined: Aug 2003
Posts: 1,644
Likes: 4
From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: spark plug gap

Originally Posted by james.gould150
with the msd i think your supposed to start at .050 and work your way up ? and a side note how is it working for you do you think it was worth the 200 or so $$ ive been up in the air about getting one myself
Seems ok, so far still working out other bugs in the car... I was just reading the MSD 6AL instructions and they list gap start points.

Compression Spark Plug Gap
up to 10.5:1 0.050"-0.060"
10.5:1-13.0:1 0.040"-0.050"
Above 13.0:1 0.035"-0.045"
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Old Apr 11, 2011 | 07:48 PM
  #5  
james.gould150's Avatar
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Joined: Mar 2011
Posts: 183
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From: Mays Landing, NJ
Car: 1991 z28
Engine: 305 tpi
Transmission: 700r Automatic
Re: spark plug gap

makes sense i just read you have something like 11:1 comp ratio so you should have a good starting ppoint, ive adjusted my brothers car based on msd's chart and his car runs 10:1 and his are set at .055 and runs flawlessly it takes trial and error gotta experiment with different gaps
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Old Apr 11, 2011 | 07:49 PM
  #6  
james.gould150's Avatar
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Joined: Mar 2011
Posts: 183
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From: Mays Landing, NJ
Car: 1991 z28
Engine: 305 tpi
Transmission: 700r Automatic
Re: spark plug gap

nice car by the way what color is that if you dont mind me askin i was thinking of having my camaro painted a similar color
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