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plugs

  1. GN7 On the Dyno
    What do these plugs say to you. 476 BBC, hydraulic roller, aluminum heads, duel plane, 830cfm Holley 6.5 pv's 84/84 jets. Thinking of going 86/86 or 84/88.
  2. Jet Boats
    The oil gallery plugs behind my timing cover do not fit very good they stick out about 1/8" from the block. Is this common or should they sit flush? Also what type of sealant do I use on these?
  3. V-Drives
    I was going through some stuff and found a set of eight Champion RF9YC plugs. I bought a few sets years ago for my flatbottom, it had a 427 FE in it. I sold the boat a few years ago, so this set is a leftover. These would be nice if you have a vintage flat or rod with an FE in it. They are NOS...
  4. GN7 On the Dyno
    What is the best way to read a ngk spark plug. I've been reading a few popular articles and each one is different. Thanks
  5. Parts for Sale
    Im looking for fuel filler hole plugs. The tanks in my hull were moved. I need to plug the hole not in use. The boat came with two when l bought it, I have missed placed one. I have checked the regular venders, Cp, Harden, Rex with no luck. Of you know where the are sold, please share the...
  6. GN7 On the Dyno
    Does someone have a picture of what it looks like when the cad plating on a ngk spark plug starts to burn off.
  7. V-Drives
    Lookin to buy 3 transom plugs because mine are. Nowhere to be seen. What's the best bang for the buck plugs?
  8. Parts for Sale
    Several AN-8 stuff for sale. Prices & quantities vary. (949)248-0083 or [email protected] Straight hose ends (8)...........$7.00 ea. 30* hose ends (2).................$17.00 ea. 45* hose ends (12)................$17.00 ea. 60* hose ends (6)..................$17.00 ea. 90* hose ends...
  9. Jet Boats
    Hey all, was wondering if you guys could shed some light on my situation. Took the boat out this morning for the third time since I have had it and each time has been a pain in the a$$. This boat is a ball buster but I like it so I'm gonna stick with it. So I thought I weeded out all the issues...
  10. GN7 On the Dyno
    any suggestions on what spark plugs to run. 40 over 502 10 to 1 comp. hyd. roller cam 990 heads mallory electronic ignition tunnel ram twin 660 holley carbs 100 octane fuel
  11. GN7 On the Dyno
    how many of you guys index the plugs? how important is it? if so what washers or kit do you use and like? this is for a BBC app if that matters.Thanks Travis:)grn
  12. GN7 On the Dyno
    Having trouble finding spark plugs for the 990 head. Need a short reach plug, only thing I can find is a 13/16 head. Really does not fit. I've ground/sharpened a socket wrench but the hex head literally screws all the way in, leaving nothing to bite. And a tight fit at that. I narrowed down...
  13. Jet Boats
    Did a search and didn't come up with any threads on this. Im having my Bassett twisties coated and am planing to run them dry however, I would like to plug or cap the water injection bungs so if decide to go back to runing water. Sizes, where to buy, options and any pics?
  14. Jet Boats
    Can any of you guys recommend a plug for me. Stock bottom 454 with gm oval cast heads 113cc. Solid Roller 630 lift cam 280 dur. MSD billet distributor, dominator carb. Low compression, 10:1. Running 91-93 octane. New heads and cam set up, unsure if I should stay with what I am running or...
  15. GN7 On the Dyno
    I am wondering what plugs you guys are running in your high compression motors, im running a ngk7 heres what i have its around 13to1 compression with brodix 2x heads, it seams a little cold for what i have its just all i could find at the parts houses around here.
  16. GN7 On the Dyno
    can anyone recommend a good set of spark plugs to use just got my motor all done, minus having to pull it back out saturday for an oil driveshaft issue that should be resolved this weekend wondering how hot of a plug to run 540 9-1 short block .650" solid roller .252/[email protected] 114 brodix...
  17. GN7 On the Dyno
    1981 400 hp stock Mercruiser Motors in an old Scarab. Converting the ignition from points to Hei, need to know what plugs to buy. Not at the boat will have to get them before I go do the job.
  18. GN7 On the Dyno
    Back in the day, I worked on combos we had to index the plugs just to keep the piston from closing up the plug gap due to piston/head clearance. On our SS motor, the plugs are indexed even though threre's enough piston to head clearance to not need indexing. I'm guessing the plugs are indexed to...
  19. V-Drives
    How much are Balancers charging for Mallory Plugs, (alloy of tungsten), for internally balancing crankshafts these days? I have a number of dead crankshafts with the plugs still in them. Back in the day, I think I payed $50 a plug. I am looking to get a 1/4" keyway cut into stock shaft thinking...
  20. Jet Boats
    So i found out today that I have a blown out freeze plug at the end of the cylinder head on my ford 460. All of the kits that Iam seeing come with screw in plugs for the heads and mine has the press in plugs, is there any problem with using the screw ins for the head??
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