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gap for plugs, for a stroker motor........................

Old Jul 3, 2003 | 07:06 PM
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Default gap for plugs, for a stroker motor........................

what is a factory LS1/LS6 gap?

How about for a 427 stroker?

NON-nitrous.
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Old Jul 3, 2003 | 07:43 PM
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Default Re: gap for plugs, for a stroker motor........................

Well...my Haynes says that LS1s were factory gaped at 0.060".....


I'm running 0.050" in my 11.1:1 compression H/C LS1 and that seems to be working for me........


I'm interested to see what people say (more knowledge). As I understand it:

People go with less gap as HP increases. But that’s usually with power adders like FI or Nitrous (higher cylinder pressures) right?

With increased CI, your not really increasing the cylinder pressure, you’re just giving more piston area (or stroke/leverage) for the given pressure to work against. (my head hurts now.... )
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Old Jul 3, 2003 | 08:41 PM
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Default Re: gap for plugs, for a stroker motor........................

Well...my Haynes says that LS1s were factory gaped at 0.060".....


I'm running 0.050" in my 11.1:1 compression H/C LS1 and that seems to be working for me........


I'm interested to see what people say (more knowledge). As I understand it:

People go with less gap as HP increases. But that’s usually with power adders like FI or Nitrous (higher cylinder pressures) right?

With increased CI, your not really increasing the cylinder pressure, you’re just giving more piston area (or stroke/leverage) for the given pressure to work against. (my head hurts now.... )

So, what would happen to the motor (HOW WOULD IT RUN) if you set the gap at say .045?
Would that make it run like crap?

No power adders at all, just N/A.
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Old Jul 3, 2003 | 08:44 PM
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Default Re: gap for plugs, for a stroker motor........................

I'm really not sure......I would think it would loose hp if you got the gap too small....

the idea is to get the most gap possible (more spark) without getting it too far (spark gets "blown" out by cylinder pressure)...
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Old Jul 3, 2003 | 08:53 PM
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Default Re: gap for plugs, for a stroker motor........................

The reason I'm asking this is because the second I changed my plugs and wires last week the motor os surging like crazy every time I come to a stop. It goes from 400 to 1,500 rpm and sometimes will stall on me.
And while cruising steady at about 40mph is will start to miss and jerk back and forth till I increase throttle, then it will smooth out. Someone told me at higher rpm's the energy will be enough to keep the spark from missing, but down low it will miss.

I gapped them to .045. TR6's.

Maybe I should pull them and go to maybe .053 or something?????
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Old Jul 3, 2003 | 09:46 PM
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Default Re: gap for plugs, for a stroker motor........................

its worth a try......
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Old Jul 6, 2003 | 04:54 PM
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Default Re: gap for plugs, for a stroker motor........................

Well...my Haynes says that LS1s were factory gaped at 0.060".....


I'm running 0.050" in my 11.1:1 compression H/C LS1 and that seems to be working for me........


I'm interested to see what people say (more knowledge). As I understand it:
Looks as if most people don't know what they're talking about. TR6's have no place in a N/A stroker motor. I was told to use them gapped at .040 by a couple sponsors

TR6's can't be gapped more than .045. I put the old plugs back in (TR55's) gapped to .050 and the car runs and idles like a dream.

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Old Jul 6, 2003 | 08:32 PM
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Default Re: gap for plugs, for a stroker motor........................

I'm using TR55s gapped @ .045 with the strap cut down to the center of the electrode. That mod is supposed to be worth a few HP
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Old Jul 6, 2003 | 08:57 PM
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Default Re: gap for plugs, for a stroker motor........................

Some of my plugs said, TR55 and some said TR5. Are they the same thing?

Whats the strap of the plug?
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