Originally Posted by
NitroVein
I believe GRP made their own, as well as to other brands, but I can't recall which. Just look at the plug to see that the threads doesn't bottom out, some is threaded all the way and others isn't, make sure it seats well as well.
If nothing else maybe you could send a PM to Rody (believe he's called VS Racing here now) as his Tecnopower engines was based on this design, maybe he at least knows what doesn't work.
Originally Posted by
1/8 IC Fan
thanks for the replys guys, yea I found grp plugs on eBay in another country but I don’t think they are correct heat number. but was trying to find something that can order in the usa. It’s not my engine it’s a fellow track club member that bought it and I said I’d help him tune it but I think engine needs a new plug cause it’s been sitting. So I’m asking for him but yea thanks for info guys.