Technical > Matt Shaff's Engine Shop
Spark Plug indexing
George:
Checkout the Southwest Junior Fuel Forum. http://www.angelfire.com/tx/fuelcarfan/jrfuelers/results.html
There is a thread on the purchase of the Goodyears. Last set I bought used from Scott Parks. Too bad someone else doesn't make a lightweight grow tire.
Good racing. George
ricardo1967:
--- Quote from: masracingtd1167 on March 21, 2013, 02:58:45 PM ---Thank's Ricardo This forum is a great place for us to share information with each other . Most of the other forum's like Bracket Talk and Yellow Bullet are not really geared for what we do . Racing a F.E.D. is much different than a R.E.D. After seeing what George is going on his 60ft's I am thinking about going back to those 12x31 Goodyear's if I can get a set.
--- End quote ---
Thank you Bill and everybody else here for sharing precious knowledge with FED rookies like me.
coupemerc:
I will have to index the plugs on my deal because I'm shooting for a max compression piston dome. But I would index anyway. Why not? If you don't do it, the guy in the next lane will. All it costs is some time.
George:
--- Quote from: coupemerc on March 23, 2013, 01:57:16 PM ---I will have to index the plugs on my deal because I'm shooting for a max compression piston dome. But I would index anyway. Why not? If you don't do it, the guy in the next lane will. All it costs is some time.
--- End quote ---
It will take tapered washers for my deal or a lot of spark plugs. How is the plug indexed in relation to the intake valve? Injection ? Fuel ? Compression ?
What's it worth on the dyno and/or track?
coupemerc:
I'm shooting for the spark plugs having the open side of the gap somewhere between facing down towards the piston top and the intake valve. It's on a Kinsler 2.875" stack injector, methanol and CR will be around 16:1 (maybe). I have no knowledge on what indexing is worth on the dyno or track.
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