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Another sparkplug gap question...

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Old 06-04-2005 | 11:28 PM
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hugger427's Avatar
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Default Another sparkplug gap question...

I've got TR55's gapped a .035 and it runs a little rough.

It a N/A 427 pushing over 510 RWHP on around 10.5:1 compression. I'm thinging it's suppose to be gapped at around .042 - .045.

What's the right gap???

Thanks!
Old 06-05-2005 | 01:44 AM
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I would say .04-.045 is right on. you're gapped a bit too small with .035.
Old 06-05-2005 | 10:49 AM
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Where is it running rough?

What compression are you running?

My car didn't like TR-55's after the H/C swap (higher compression heads). It would breakup on topend. I switched to TR-6's at stock gap. Running great ever since.
Old 06-05-2005 | 05:33 PM
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Originally Posted by WILWAXU
Where is it running rough?

What compression are you running?

My car didn't like TR-55's after the H/C swap (higher compression heads). It would breakup on topend. I switched to TR-6's at stock gap. Running great ever since.
10.5:1

Runs rough at crusing speeds. WOT is fine.

I think TR 6's would be too cold
Old 06-07-2005 | 10:51 PM
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Sounds like it's a little fat at idle.




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