SC300_704

iTrader: (5)

i've been doing some research on what spark plugs to use when someone goes turbo and found the DENSO Iridium Power Spark Plug IK27..my questions are, will these exact ones here on the link fit since it doesn't say what car it'll fit on it or do they fit any car?

http://cgi.ebay.com/ebaymotors/6-DEN...#ht_3794wt_939

ashtray

iTrader: (12)

they should..i literally just got those but IK16..

turbodremz

iTrader: (18)

IIRC the IK27 is just a hotter plug, but dont quote me on that..but the thread length and pitch should be the same.

SC300_704

iTrader: (5)

which one would ya recommend? i'm aiming for 450+whp.

turbodremz

iTrader: (18)

Im running the ik16's right now and have had them in since I went na-t, and plan to keep the same plugs cause I know they work.

ashtray

iTrader: (12)

by hotter to you mean higher withstand-able temperatures?

turbodremz

iTrader: (18)

hotter in the term that it could cause pre-ignition/detonation

SC300_704

iTrader: (5)

^^ what did you gap them at? from my understanding you're not supposed to touch/gap the ik27 at all b/c it's already come gapped @ .030 i believe....

turbodremz

iTrader: (18)

I have mine gapped at .28, for the ik27's not sure..that one you might want to check on clubna-t..

whats your compression going to be at, and what size injectors are you planning on using?

SC300_704

iTrader: (5)

running Marks/XS power 1.3mm hg kit and PTE 525cc injectors..

Plug selection
Note - This selection list does not take Nitrous into account. If you have Nitrous go one grade colder than this table advises at your boost/performance level.

Normally Aspirated
NGK - Standard - BKR5ES-11 (2382) - gap 1.1mm
NGK - V-Power - BKR5EYA-11 (2526) - gap 1.1mm
NGK - G-Power Platinum - BKR5EGP (7090) - gap 1.1mm
NGK -Laser Platinum - BKR5EP-11 ( 3440) -gap 1.1mm
NGK -OE Laser Iridium - IFR5T11 (4996) - gap 1.1mm
NGK - Iridium IX - BKR5EIX-11 (5464) - gap 1.1mm
Denso Platinum - PK16R11 - gap 1.1mm

Stock TT
NGK - BCPR6EP-11 - gap to 1.1mm PLATINUM
NGK - BKR6E (2756) - gap 1.1mm
NGK Iridium - BKR6EIX-11 (3764) leave gap alone
Denso Platinum - PK20R11 - gap 1.1mm
Denso Iridium - IK20 - leave gap alone

TT @ upto 1bar
NGK - BCPR7ES (3330) - gap 0.9mm
NGK - BKR7E (6097) - gap 0.9mm
NGK - Iridium - BKR6EIX or BKR7EIX - leave gap alone
Denso Platinum - PK20R11 - gap 0.8mm
Denso Iridium - IK22 - leave gap alone

TT/hybrids @ upto 1.3bar
NGK - BCPR7ES (3330) - gap 0.7mm
NGK - BKR7E (6097) - gap 0.7mm
NGK - BKR8E - gap to 0.7mm
NGK - BCPR8ES (3330) - gap 0.7mm
NGK Iridium - BKR7EIX - leave gap alone
NGK Iridium - BKR8EIX - leave gap alone
Denso Platinum - PK20R8 - gap 0.7mm
Denso Iridium - IK22 - leave gap alone
Denso Iridium - IK24 - leave gap alone

Single Turbo/Big Twins @ upto 1.3bar
NGK - BCPR7ES (3330) - gap 0.7mm
NGK - BKR7E (6097) - gap 0.7mm
NGK - BKR8E - gap to 0.7mm
NGK Iridium - BKR8EIX - leave gap alone
Denso Iridium - IK24 - leave gap alone

Single Turbo/Big Twins @ upto 1.8bar
NGK - BCPR8ES - gap 0.6-0.7mm
NGK - BKR8E - gap 0.6-0.7mm
NGK Iridium - BKR8EIX - leave gap alone
Denso Iridium - IK27 - leave gap alone

Single Turbo/Big Twins @ 2+bar
NGK - BCPR8ES - gap 0.6mm ??? UNTESTED
NGK - BKR8E - gap 0.6mm ??? UNTESTED
NGK Iridium - BKR8EIX or BKR9EIX? - leave gap alone ??? UNTESTED
Denso Iridium - IK27 to IK31 - leave gap alone ??? UNTESTED


Information sources
Denso
NGK
Sparkplugs.co.uk
Personal experience
Previous discussions on this and other BBS's.

turbodremz

iTrader: (18)

judging by the specs above, and confirming that it is a hotter plug, I would say .030 would be the minimum. I think if you went with a .028 (i put .28 above-fail) they may foul quickly.

SC300_704

iTrader: (5)

so if i go .028 or lower than the ik27 won't last as long?

turbodremz

iTrader: (18)

exactly, and you might run a higher chance of detonation.