i got 12.5.1 compression what should i gap my spark plugs at?

 

i would also loke to know

 

 

.035"

 

I run them a little tighter @ .032".

 

what is stock gap on a b/h/k series?

 

thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PeopleAgainstJDM &raquo;</TD></TR><TR><TD CLASS="quote">

Should be 0.044.</TD></TR></TABLE>

thanx

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PeopleAgainstJDM &raquo;</TD></TR><TR><TD CLASS="quote">

Should be 0.044.</TD></TR></TABLE>
x2

 

Yep, tighten them up a little

 

isn't the b18b gapped at .040? thats what i have my stock b18b gapped at

 

Wile we are on the subject.
What plugs are you guys running, and how offten are you changing them out?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91’ LS-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">Wile we are on the subject.
What plugs are you guys running, and how offten are you changing them out?</TD></TR></TABLE>

NGK 7's, every other oil change

 

been wondering this myself..

im 11:5 comp and i just got a set of bkr7e's.. stock is .44 but i was thinking about .40 or .38 for mysetup.. not quite sure though

 

.044 will work fine
If you want to play around on the dyno at x dollars per hour, try .040 and .038

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">.044 will work fine
If you want to play around on the dyno at x dollars per hour, try .040 and .038 </TD></TR></TABLE>

dyno time is no worry.. probably get it for free or very close anyway

 

back from the dead,,,,,,,,,,I understand that you close gap down some BUT what if
your are running MSD ingnition,,,,,,, how much gap?????

 

Do you want best pef at WOT or crusing? Put the helms manual away on this topic.

I see all kinds of misguided info here.

I'll wait and see who is smart and who is clueless.

 

Something i haven't though about too. Great topic!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Master of the Universe &raquo;</TD></TR><TR><TD CLASS="quote">I'll wait and see who is smart and who is clueless.</TD></TR></TABLE>

Why not get us started with your theory

 

we dynoed a buddys 12:5to1 2.0 lsvtec with ported head jun3's and smsp header and with back to back dyno runs with no changes we changed the plug gap from .38 to .44 and then .35 and there was a difference of 5 whp opening the gap from .35 to .44. i'm not sure if something else came into play but ect and iat was around the same and so was everything else. he was running ngk 7's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Natural Aspirations &raquo;</TD></TR><TR><TD CLASS="quote">Why not get us started with your theory</TD></TR></TABLE>

Sorry, I am just here to make people look dumb including myself.

There are just so many damned "experts" here that graduated from nothing more than PM university.

 

I haven't graduated yet, 6th year resident,.,, Is there big difference between wot a part throttle? But I want WOT throttle gap specs and I'm gapped at 44

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Master of the Universe &raquo;</TD></TR><TR><TD CLASS="quote">

Sorry, I am just here to make people look dumb including myself.

There are just so many damned "experts" here that graduated from nothing more than PM university.</TD></TR></TABLE>

Me being far from a expert is always willing to learn, so why don't you share some info to educate the general public? Or are we all going to pretend we know what the answer is, but we're too good to good to publicly share.

 

From what I've learned over the years, the wider the gap (that the ignition system can sustain) the more power will be made. The only reason for closing the gap down was if you were running high compression, boost or nitrous because the extra dense mixture and higher cylinder pressures could "blow out" the spark/flame. That's where enhanced ignition systems like MSD allow you to run larger gaps on higher compression/boosted engines which usually translates into more power and responsiveness.

I don't claim to know all of the theory behind how it works, I can only pass along information that I have both read and experienced. Jacobs Electronics had some interesting articles years ago on this topic.