i need to install some new plugs to replace my bosche platnums. I got some of the NGK 1 step cooler plugs for the JRSC. DOes anyone know what the gap is suppose to be on those.

 

.25

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHK4TIX &raquo;</TD></TR><TR><TD CLASS="quote">.25</TD></TR></TABLE>
That's a pretty large gap, I'm sure you meant .025

Many JRSC luders are running gaps between .030-.035. You'll need to play around with the gap size (preferably on a dyno) to find what is optimal for you. I'm running .028 with 9 psi.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sharkcohen &raquo;</TD></TR><TR><TD CLASS="quote">
That's a pretty large gap, I'm sure you meant .025

Many JRSC luders are running gaps between .030-.035. You'll need to play around with the gap size (preferably on a dyno) to find what is optimal for you. I'm running .028 with 9 psi.</TD></TR></TABLE>

sorry, i did mean .025

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sharkcohen &raquo;</TD></TR><TR><TD CLASS="quote">
That's a pretty large gap, I'm sure you meant .025

Many JRSC luders are running gaps between .030-.035. You'll need to play around with the gap size (preferably on a dyno) to find what is optimal for you. I'm running .028 with 9 psi.</TD></TR></TABLE>

What are the tradeoffs with having a large gap vs small?

 

is it better to be at 0.35 for JRSC than .025?
I dont have a dyno anywhere around where i live, how would it affect it?

 

The larger the gap, the more likely the spark will be "blown out" during boost, causing problems with igniting the mixture.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by preludesh012001 &raquo;</TD></TR><TR><TD CLASS="quote">is it better to be at 0.35 for JRSC than .025?
I dont have a dyno anywhere around where i live, how would it affect it?
</TD></TR></TABLE>
A safe gap would be .030.

How do you plan on making sure you are not running too lean if you don't have a dyno with a wideband near you??? I hope you plan on installing a fuel pressure gauge, as fuel pressure IS your fuel delivery system during boost. Setting the fuel pressure properly is CRITICAL.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sharkcohen &raquo;</TD></TR><TR><TD CLASS="quote">The larger the gap, the more likely the spark will be "blown out" during boost, causing problems with igniting the mixture.</TD></TR></TABLE>

then why dont you just make a small gap in the first place?

 

Well, considering that the stock gap is .044, that is what we are discussing doing.