Hi guys so I’m currently running NGK CR9EK plugs which the previous owner supplied me with so I bought spares , is anyone using iridium plugs , If so which ones ?
I don't personally use them, and find nothing wrong with standard plugs. The added ground strap on the "k" designation takes up space and increases compression and potentially a tiny bit of performance. I suspect this was the reason for the previous owners choice.
As a side note, the CR9EB option has a solid top and is a good option for positive cap contact without the need for a thread on adaptor.
Rich
I have always used the IR plugs. That is what Spring Mountain uses when they overhaul the engines. Part number is CR9EIA9.
@charleyhradicalsportscarregistry-com You are 100% correct.
My apologies, I didn't realize the question was pertaining to an RPE Suzuki that definitely recommends the factory plug as in your picture.
My comment was only a personal opinion regarding the general use of the CR9EK and was not meant to cause confusion.
G’day @charleyhradicalsportscarregistry-com
My new engine has arrived earlier than expected which is a nice surprise… RPE-894.
Looks great and hoping to do the swap next weekend. Old Engine is completely disconnected and everything removed, with just the two engine cradle bolts still holding it in until my mate arrives with his engine hoist next weekend.
The plugs I removed from the old engine looked ok (number 2 cylinder plug has some marks on the outer section that look like water marks… not sure about them), which doesn’t surprise me as it was running fine, just had the ‘shiny stuff’ in the inlet side of the oil filter…. Will be interesting to see what is found when it’s opened up!
The old plugs were not tight (but were seated on the seal washer) and I hadn’t checked them since owning the car… so we’re probably like that when sent from the UK.
The old plugs were CR9EB’s with 3 plugs at 0.030” gaps, and one at 0.032” gap.
The new spare set of plugs I had purchased when I bought the car are NGK Iridium CR9EIA-9, the same as you mention in your post here.
The new engine arrived without plugs, so I’ll use these, and purchase some new spares.
My question is what gap to set them at? I can’t find it anywhere, but I think I read somewhere that they should be 0.028”. … any insight?
Here’s the CR9EB’s I pulled out…. Note the marks on #2.
