Cooler Plugs?

[carl h]

hey all, rb20det is the engine.

currently running bcpr7es plugs in my car at 400whp, however im looking for something colder, round the 8 range.......

anyone know of a ngk plug that will suit the engine and will work?

[SimonR32]

best plugs for rb20 seem to be bcp6es, dont get bcpr6es are the resistor causes missfire problems

[blind_elk]

Use the same plug P/N, just change the "7" for an "8" or whatever number you think appropriate.

I have a set of Platinum 8s around somewhere (PFR8B-9) - PM me if you are interested.

[carl h]

orly?

hrmmm i am getting a bit of a miss fire at idle and at high rpms (7.8k or so)......but ive been running the bcpr7es's for 4 months now and its been mint.

ngk doesnt seem to make a 8 in the bcprXes range, which is why im asking if anyone has some part numbers handy........

as for the iridiums im here in the USA, shipping wouldnt be worth it, thx for the offer tho.

[rd-runr]

best plugs for rb20 seem to be bcp6es, dont get bcpr6es are the resistor causes missfire problems

<{POST_SNAPBACK}>

Would this problem be the same for Series 1 R33s?

[SimonR32]

yeah all rb engines

[RB30-POWER]

changing the plug heat range will highly unlikely fix your problem.

what ignition system do you run, what gaps?

unless your using a sustained output of 400hp for minutes on end, going to a 8 rating plug will more then likely just foul up quicker and cause more missing, because they aren't hot enough to burn the carbon deposits off.

is this a dedicated race car or street car your talking about?

[carl h]

currently running std ignition system, but looking into upgrading it.

i suspect a faulty coil but since im running higher than stock boost (17psi on high boost) i thought it would be wise to step up to a cooler plug.

i usualy run .8mm gap but gapped the plugs down to .6mm to see if that would help with the car any, but it hasnt.

this is also a street car that sees 400whp on the weekends but is on low boost (14) for the rest of the week.

Edited October 21, 2005 by carl h

[ADM]

NGK V-Power 8" R5671A-8

Are a copper 8 heat range and are already gapped to .8mm

Its what Tilbrook Auto and Dyno have been using in their boosted Skylines for several years now.

Edited October 22, 2005 by ADM

[T04GTR]

you need to upgrade your ignition system.

but i wouldnt go to a 8 unless its a dedicated race car.

iether

bcpr7ey or s (y = vgrooved centre electrode)

bkr7ey or s

bke7eix (iridum)

pfr7a or b etc (platnum)

or in denso.

iq22 (best one.)

all the normal coper ones should be changed with your oil.

[rob82]

Lets remember to that 400whp US isn't 400whp AUS its probly somewhere around 330w hp so around 250rwkw. Its not to excessive power wise considering their 93 octane fuel. Check your coil's dude. Your miss at idle is probably due to you plugs being gapped so low. If you need a 0.6mm gap its time for CDI.

[carl h]

car makes about 288rwkw's on a dyno dynamics dyno.

as far as the coils being bad im sure thats the cause, but as far as a ignition system upgrade what do you guys sudgest?

supra guys here stateside swear by the hks twinpower, while ive heard that it does nothing, any good reccomendations on cdi systems?

[maximajim]

Pointless buying a CDI and using old coils. Either buy both new, or buy some split fire coils, $413 shipped to the US, about the same price of a DLI.

[Sheriff Wan]

Im using Bkr6e NGK plugs and im making around 200rwkw on my RB20DET and i havent had any issues with them at all.

Just my 2 cents

[T04GTR]

im not a huge fan of splitfire coils as i noticed no diferance with them.

a twin power would be the easiest option.

sort of half a cdi but withought all the mucking around withe signal conerters for a msd and leads with twinpost coils. etc

[carl h]

yah, from what ive been told they arnt much better power wise than stockers.......

as for the twin power, im kinda hesitant on it, some say it works others say stay away, so im not sure what to do about that.

i did however get some NIB GM DIS coils of ebay for a dollar, and for me to sort leads would be about 40$, so doing an external coilsetup wouldnt be too terribly hard........and if i did that i could go ahead and grab a msd dis-4 box and call it a day and still have some money left over vs buying a twinpower or splitfires.

this info in this thread is excelent, even just for the spark plug numbers, its much appreciated!

[maximajim]

The splitfires are good for stock replacements, they are much much cheaper. I end up paying over $100 for a single new coil from Yahoo japan through Rinkya.

If your coils are truely going bad, they obviously will make a difference. My point is it not a good idea buying a DLI and sending that power through dying coils.

[carl h]

The splitfires are good for stock replacements, they are much much cheaper. I end up paying over $100 for a single new coil from Yahoo japan through Rinkya.

If your coils are truely going bad, they obviously will make a difference.  My point is it not a good idea buying a DLI and  sending that power through dying coils.

<{POST_SNAPBACK}>

agreed.

i plan on wiring up these external coils and seeing how she goes, but i do agree that trying to power up dying coils is a bit stupid.

if all goes well these external coils should help a bit and if not its not too much lost (1$ for 3 NIB coils off ebay) and i can always go with the proven splitfires......