Oddzball
Member
Well odds are if it IS shorter, its probably going to need a shorter plug.
I got the billet head from rocksolid engines.
Now the piston is hitting the spark plug now. It's the normal spark plug that comes with the engine itself (STOCK PLUG)
How in the cr#p can i make clearance for it to not hit it?
Help me....... PLZZZZZZZZZZZ
Here's a question, and it's not entirely off topic or out of place I don't believe.
How is it that you purchased an aftermarket head for almost 100 bucks, yet you haven't gotten a sparkplug to replace the stock sparkplug yet?
Not to be rude or anything by any means, but really a sparkplug is a very cheap and simple upgrade that usually gets done in the first few days, if not before assembly.
Awesome thank you. I will use this if the spark plugs i get fail me.My NGK B5HS has a 14mm reach. Looking at the chart at http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm I can see that there are plugs available with 8, 10, and 12mm reach.
You motorheads are far too quick to pull your engines down ! LOL
Grab a larger paperclip from the desk your pc is sitting at and bend it so there is a small L at one end, a straight length, and ANYTHING at the opposite end that will keep it from falling completely into the sparkplug hole.
Stick it into the ho, catch it on the bottom of the threaded part, and make a small mark with a sharpie, a piece of tape, or something....
Compare that length against the plug, with a compressed gasket on it and see where it corresponds. That will get you started on IF you need to pop the head or not !
...if no one mentioned, they DO sell spark plug shims used for indexing the plug, but they will be a bit tricky to locate a source.
...and who's got clay!!! LOL
A bit of chewing gum, wadded up white bread, or some flour paste bread dough would suffice for a clearance test at a preliminary stage.
...and yah GOTTA have clearance because at high rpm, after the heat causes everything to grow, the crank literally throws the piston up and will exceed static clearance.
Fun stuff!
Good luck
rc
Phht who DOESNT have clay?
Anyway, frankly i think those heads are hinky anyway. Hardly any fins for air cooling. I wouldnt run one, but to each his own.
Besides, pulling the head takes 5 mins, provided you didnt jack up the head gasket. And you could be talking mm or less measurements, dont know if a mark on a paperclip would be good enough.
...That's an Oops!
Don't re-use a crush gasket from a sparkplug ! Especially stacking them !!!
They nearly always blow out.
(Please don't ask how I know all this stuff!)
Good luck
rc
A, have you noticed an obvious reduction of noise by putting the rubber in the cooling fins?
I'm kinda concerned about the 'trashy' noise these HT engines throw off to the side while travelling through town.
<< I >> could probably ignore it myself, for a while, but would prefer an engine that is quieter. LOL Had an old harley flathead once that drove me nuts after I put hi-compression aluminum heads on it! I just couldn't hang... got it finished and sold it!
Best
rc