Pnoyej6

Im currently running ngk 9's on my ls vtec turbo 7psi 240whp and having problems with my ngk 9's boggin low rpm sometimes, not sure if its my stupid stage 3 clutch but i heard ngk 7's vpower copper plugs are good n cheaper. Wht do you guys think? I was said 9's are way too cold for my application . SHould i downgrade to ngk 7's?

2muchJDM

them being too cold can definately cause a low RPM problem

Dunc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PnoyLSV-T &raquo;</TD></TR><TR><TD CLASS="quote">I was said 9's are way too cold for my application . SHould i downgrade to ngk 7's?</TD></TR></TABLE>

I'm not sure if you meant it like that or not, but don't think that just because it's a lower number that it is "downgrading". The number is just a means of making sure you have the right plug for you application. Yes, at 240whp NGK 9's are too cold for your application. Grab some BKR7E's from Advance Auto or some place like that. Generally (don't take this as being a rule) people don't start using 9's until at least 500whp if not more.

TDCTyler

i just got some ngk 7's and gapped them to 0.25, they have been awesome so far.
i had to go to 5 parts stores to get them, it sucked. they are not BKR7E's i think they start with a Z. Has anyone heard of anything like that?

Dunc

I'm assuming these are for the car in your signature? If so that's why....B series plugs are different than your H.

EDIT: I will correct myself, that's not the sole reason haha. You can get NGK BCPR7ES for the H's.

Pnoyej6

thanks guys. I will definitely pick up some n gk 7's. Is the part number bkr7e's ngk v power copper 7's. One of the shop recommend i get copper