Andrew Harper

Having just bought myself a set of HKS Iridium Plugs can someone tell me what gap setting they should be set at?

The workshop manuals obviously refer to the gap-less plugs which don't have the same arrangement as the HKS/DENSO Plugs.

Perhaps they should be left at their default setting?

Help Please!


(and before anyone says it, yes I know now that the NGK's are better but I read that after I bought the HKS ones. Oh well you live n' learn...)

JONSKI

Are you sure you got the right plugs?

maxpesce

Rotary Plugs should have NON ADJUSTABLE Side-Gap Electrodes

Andrew Harper

I have checked the serial no. on the plug (R45RE) against the HKS Web Site, and they are indeed the Iridium Plugs designed for the RX7.

The "L" piece on top of the plug is mounted flush with the body of the plug. This, I assume is to stop the plug reaching to far into the engine

The only other question I have is of the people running the HKS plugs what is the average life of these plugs on the car? The electrode is so thin it could be as little as 8,000 miles?

bajaman

Hmmmmm, that is pretty trippy.....
You are saying that these plugs look like conventional plugs?
The only rotary plugs I have seen have side, NOT top, electrodes.

Andrew Harper

I've sent an email off to HKS Europe to find out if my new set of lovely spark plugs are gonna wreck my engine!

Hopefully I'll get a reply in the next year...

Meanwhile if any of you guys want to go to

hks-power.co.jp

and look up the Super Fire Racing plugs you should see a picture of the Rotary Spec items and you'll see what I mean about the arrangement of the electrode.

CYM TKT

iTrader: (4)

look like normal plugs to me.. maybe you got the wrong ones in the right box.

fdracer

iridium tips are supposed to be ultra fine, they're much thinner than platnums but last much longer, so don't worry about. the only thing you have to worry about is fouling.

Andrew Harper

Thanks Guys. Replies as good as always.....

Will keep you updated on any special developments on this continuing saga!

jspecracer7

I'm surprised none of you have used iridium plugs! They're REALLY expensive here in Japan. They look like a conventional spark plug....but I couldn't tell you the gap since I run stock 9's all around.

the_glass_man

iTrader: (2)

Its got a Gap so Dr. Dre's Jimmy's got to fit. Bow wow wow, yippie ya, yippie yo.
As far as the gap, dude they gave you the wrong plugs.
You just stick it in her and play with it, till it gets a little snug.
Make sure to use lots of lube, so it slides out easy, and comes out easy!!!
Please don't spend (read waste) the extra money on these ultra f*cking expensive plugs. Just buy the $2.00 a piece copper 9's.

saiyan

iTrader: (1)

Sounds like they gave you the wrong plugs.. I'm running Denso iridium plugs and I don't have to adjust anything.. They look just like the stock NGK's, only the stripes are in different color....

jspecracer7

He didn't get the wrong plugs. Those are what HKS Iridium plugs look like.

They don't last much longer than stock NGK's. Better off spending the money elsewhere than on sparkplugs.

maxcooper

I think the NGK racing plugs have a side electrode, too, but it comes from the side of the housing over to the side of the center electrode. You don't have to gap them. And I could be wrong, as I have only seen them in pictures.

-Max

Andrew Harper

Hello Again Guys!

Thanks JSpecRacer you given the correct answer.

OK here's the official reply from HKS Europe......

The HKS Super Fire Racing plug 5408-R45RE is correct for your vehicle. The 5408-R45RE is at the lower end of the heat range for your vehicle. The other choices being R50RE / R525RE and R55RE. The R45RE is equivalent to a NGK 9 and will perform well in a stock application. If you begin to modify your vehicle extensively then you might consider a higher numbered plug. The plugs will come from the factory with the correct gap and no adjustment is required.

So there we go ladies and gents, I do have the right plugs! (they just look totally different!)