Higher HP spark plugs? 400whp+ (searched)

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01-18-2005, 02:31 AM

Cyphear

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Higher HP spark plugs? 400whp+ (searched)

Should you continue making the plugs colder after 300whp or so? I'm running BKR7E's right now which is what people say to use for 300whp but what about the people running 400+whp?

is there a good 8 or 9 series plug to use? The NGK plug list is sooo long, theres way to many options, and not many 8 or 9's.

BTW: im running a b18b so 7 is 2 colder than stock.

TIA.

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01-18-2005, 02:46 AM

PM-Performance

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Re: Higher HP spark plugs? 400whp+ (Cyphear)

you didnt look hard enuff becuase there is tons of posts on plugs.
Yes they make an 8, 9, 10 ect series

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01-18-2005, 02:52 AM

Adi Radoncic

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Re: Higher HP spark plugs? 400whp+ (itr206)

for 400+ you need 8's n 500+ its a good idea to go with 9's

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01-18-2005, 05:52 AM

Rod.

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Re: Higher HP spark plugs? 400whp+ (newgsr)

I am still using 7's on 400+. It runs fine and no misfire during boost runs. Should I be stepping up to 8's?

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01-18-2005, 06:00 AM

PM-Performance

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Re: Higher HP spark plugs? 400whp+ (redturbocivic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redturbocivic »</TD></TR><TR><TD CLASS="quote">I am still using 7's on 400+. It runs fine and no misfire during boost runs. Should I be stepping up to 8's?</TD></TR></TABLE>

You dont have to, but its a good idea.

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01-18-2005, 05:34 PM

Cyphear

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Re: Higher HP spark plugs? 400whp+ (itr206)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 »</TD></TR><TR><TD CLASS="quote">you didnt look hard enuff becuase there is tons of posts on plugs.
Yes they make an 8, 9, 10 ect series</TD></TR></TABLE>

i seriously did like 6 or 7 searches, there are pleanty about spark plugs, not any were on higher than 7 heat ranges though.

Anyway, Thanks. What specific plugs do people recommend?

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01-18-2005, 05:39 PM

XXXRacing

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Re: Higher HP spark plugs? 400whp+ (Cyphear)

R5671A-8, R5671A-9 or R5671A-10 is what I would recommend. I personally have run the 9 & 10 heat ranges.

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01-18-2005, 06:52 PM

maxspeedhonda

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Re: Higher HP spark plugs? 400whp+ (XXXRacing)

bump because I would like to know as well

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01-18-2005, 07:26 PM

rhamlinii

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Re: Higher HP spark plugs? 400whp+ (maxspeedhonda)

I runs 8s in my car's. People that run double the horse power I do run 8s as well. The worse thing that can happen running a spark plug that is to cold, is exsessive carbon build up or maybe a missfire. They just will foul faster, from what im told.

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01-18-2005, 08:04 PM

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Re: Higher HP spark plugs? 400whp+ (rhamlinii)

NGK BKR7E's with 450+ HP here

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01-18-2005, 08:41 PM

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Mase

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Re: Higher HP spark plugs? 400whp+ (BoostedJeff)

id recommend some NGK 5238's

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01-18-2005, 11:37 PM

#12

Cyphear

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Re: Higher HP spark plugs? 400whp+ (XXXRacing)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XXXRacing »</TD></TR><TR><TD CLASS="quote">R5671A-8, R5671A-9 or R5671A-10 is what I would recommend. I personally have run the 9 & 10 heat ranges.</TD></TR></TABLE>

Thanks, are those NGK models? (they dont look like it). are the 8,9,10 the heat ranges? did u see reduced detonation with the colder plugs?

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01-18-2005, 11:43 PM

#13

Garcia-Racing

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Those are ngk #'s. I run 8's.

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01-19-2005, 12:39 AM

#14

0project dc2

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Re: (Garcia-Racing)

sparkplugs.com

5238
R5671a-9

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01-19-2005, 12:48 AM

#15

TeStUdO

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Re: Higher HP spark plugs? 400whp+ (Mase)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase »</TD></TR><TR><TD CLASS="quote">id recommend some NGK 5238's</TD></TR></TABLE>

I recommend these:

You can find them HERE

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01-19-2005, 12:56 AM

#16

liam821

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Re: (project dc2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by project dc2 »</TD></TR><TR><TD CLASS="quote"> sparkplugs.com

5238
R5671a-9</TD></TR></TABLE>

Thats what im running in my car - with a 25 thousands gap. They have been working great. Best plugs ive ever run.

liam

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01-19-2005, 01:17 AM

#17

Cyphear

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Re: (liam821)

I think I might have to try the R5671A-8's in my car. How many do i need 4? j/k

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01-19-2005, 07:52 AM

#18

WREKONIZE V8 KLR

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good info guys

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01-19-2005, 08:35 AM

#19

jazz215

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Re: Higher HP spark plugs? 400whp+ (BoostedJeff)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedJeff »</TD></TR><TR><TD CLASS="quote">NGK BKR7E's with 450+ HP here</TD></TR></TABLE>

doh... im using those on my car only 190hp... maybe i should try 6's.

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01-19-2005, 01:05 PM

#20

XXXRacing

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Re: Higher HP spark plugs? 400whp+ (jazz215)

I would never run anything other than an NGK in a honda...definitely not autolite. Just my opinion though.

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01-19-2005, 03:47 PM

#21

liam821

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Re: Higher HP spark plugs? 400whp+ (XXXRacing)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XXXRacing »</TD></TR><TR><TD CLASS="quote">I would never run anything other than an NGK in a honda...definitely not autolite. Just my opinion though.</TD></TR></TABLE>

Agree - i would only run NGK. Although autolites are the "Nascar plug of choice".... *rolls eyes*

liam

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01-19-2005, 05:56 PM

#22

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Re: Higher HP spark plugs? 400whp+ (liam821)

AUTOLITE?!?!?!?! WTF?!?!?! Keep that in the snowblower

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01-19-2005, 08:55 PM

#23

Cyphear

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Re: Higher HP spark plugs? 400whp+ (jazz215)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jazz215 »</TD></TR><TR><TD CLASS="quote">
doh... im using those on my car only 190hp... maybe i should try 6's.</TD></TR></TABLE>

Whats stock for your car? 5? i'd say you are borderline between 1 and 2 steps colder.

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01-20-2005, 08:24 AM

#24

jazz215

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Re: Higher HP spark plugs? 400whp+ (Cyphear)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cyphear »</TD></TR><TR><TD CLASS="quote">

Whats stock for your car? 5? i'd say you are borderline between 1 and 2 steps colder.</TD></TR></TABLE>

stock is 5. i plan on picking up 6's this weekend. hopefully that will help with starts and such.

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