2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Spark plug mod

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Old Apr 10, 2009 | 12:32 PM
  #1  
cmanns's Avatar
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Smoke moar
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From: The yay, California
Spark plug mod

I was thinking bout taking out my plugs, checkin them out (No idea how many miles since change) and clean them up

Does it really do anything good to take off that crush? washer..? not expecting 800hp The engines probably on the lower end of comp, dont got a tester nor am I having issues, but I'm sure it wouldnt hurt
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Old Apr 10, 2009 | 12:45 PM
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farberio's Avatar
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Originally Posted by cmanns
I was thinking bout taking out my plugs, checkin them out (No idea how many miles since change) and clean them up

Does it really do anything good to take off that crush? washer..? not expecting 800hp The engines probably on the lower end of comp, dont got a tester nor am I having issues, but I'm sure it wouldnt hurt
From what I have read, taking off the crush washer gives a tiny bit of better response and a couple more ponies at the cost of a higher chance of fouling.
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Old Apr 10, 2009 | 01:00 PM
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Rx7TyreBurna's Avatar
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wait.... you want to pull the crush washer off why? Hoping for better compression?!

It's usually there to make the seal between the engine and the plug better. I suggest leaving it there, and invest time finding a safer way to get power. The gains would be very very small. At the wheels it probably wouldn't even be 1 HP. And, if the seal isn't good, you will be losing some compression.

I have a feeling engineers put it there for a reason, and, it should probably stay there.
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Old Apr 10, 2009 | 01:04 PM
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I've heard about this on piston engines as well, but frankly anything that puts the plug closer to the piston / rotor, I just wouldn't feel safe about it and the gains would be most likely be unnoticeable.
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Old Apr 10, 2009 | 02:26 PM
  #5  
cmanns's Avatar
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Smoke moar
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From: The yay, California
Originally Posted by farberio
From what I have read, taking off the crush washer gives a tiny bit of better response and a couple more ponies at the cost of a higher chance of fouling.
thats what I've read too few years ago, I was gonna take the plugs off and clean em but I just realised how much a pita the stuff in the way makes it

wasnt looking for more ponies

I'm shocked my plugs haven't fouled yet, they're atleast a year 1/2 old and I've put atleast 5k on since march (When I started daily driving her) runs like a champ

I just wanted to see how the plugs looked, and if I had them out. I was always curious if this was "bad" to do, anybody else know if it actually causes more fouling?
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