So what exactly does it feel like when the air charge is blowing the spark out? I still have my tr6's in from n2o, but they are gapped at .045 or so I think. I was testing today, and even though I have a way rich/low timing program set up for now, it has a stumble that comes only when it really starts flowing (1-2 psi lol <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> , that feels like a lot by itself). It's not showing up any kr (which I have made come in stronger than stock) until I let off and it closes for some reason. And I made my timing drops gradual from part throttle gms/cyl to higher gms/cyl.

As a side not, I think even in it's weakened state it still made the clutch slip a tad. DOH! <img border="0" alt="[Banging Head]" title="" src="graemlins/gr_banghead.gif" /> I figured it do better than this.

 

I'd think it would just seem to be a loss of power, but I've never gapped my FI that wide.

Most of us gap between .031 and .039.
I think the TR6's come gapped at .035; sounds as good a gap as any for FI. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

IOW's, I'd say your gap is definitely too wide, albeit borderline.

 

Max gap per spec on the TR6 is .043 per NGK.

 

I tried .045. With my water/alky and 11psi it began to misfire on the top end.I use .028 now and it cleared up the misfire.
I think Harlan also uses .028 now.

 

Thanks for the info guys! I'll throw my new set of tr6's in when I do the fuel pump this weekend. We'll see how it goes. <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />

 

I had a lot of problems with plugs and finding the right gap. Fianly i went with (belive it or not) auto lights. They were only 60 cents a plug and they worked better than any of the 6 dollar plugs like like boch +4. I gaped them at .35. And the car ran alot better.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MelloYellow:
<strong>Max gap per spec on the TR6 is .043 per NGK.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">MellowYellow... that must anticipate an N/A setup. Here is NGK's recommendation, in their own words (FAQ), on their site:

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Another consideration that should be taken into account is the extent of any modifications that you may have made to the engine. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004" for every 50 hp you add). However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005". </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Also, they say:

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Typically, for every 75-100 hp you add, you should go one step colder on the spark plug's heat range.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I don't think we expect the plugs to last long with our FI. I'd rather change them more often than let them blow out when I'm racing. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

Here's what some of the other guys are doing:

https://ls1tech.com/ubb/cgi-bin/ulti...;f=20;t=001229

https://ls1tech.com/ubb/cgi-bin/ulti...;f=20;t=001197

https://ls1tech.com/ubb/cgi-bin/ulti...;f=20;t=001029

https://ls1tech.com/ubb/cgi-bin/ulti...;f=20;t=000623

Harlan was using .035
https://ls1tech.com/ubb/cgi-bin/ulti...;f=20;t=000379

https://ls1tech.com/ubb/cgi-bin/ulti...;f=20;t=000204

I'd sure feel better if .045 would work. Anybody else have an opinion?

 

i use autolite 103's as well.. @ .035

 

Jason@GWP also recommended my next plug be an Autolite 103 gapped at .035.

I've got one more set of NGK's to use up first. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />