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spark

  1. Parts for Sale
    9 in diameter 2 inches tall for holley standard flange very nice condition asking 40.00 obo
  2. Parts for Sale
    I’m looking for one of these generic spark arrestor scoop for a Holley carb. If you have one to sell let me know. Thanks.
  3. GN7 On the Dyno
    Have always ran the AC Delco R43T plugs. Now Autozone says they are unavailable now. They have a R43TS that has an extended tip (the post and electrode stick out about 1/16" further than the R43T) The rest of the plug is identical in geometry/dimensions. I'm running a small dome 10:1 piston...
  4. Parts for Sale
    Looking for a used high flow spark arrestor. K&n is out of the question the only one that fits only flows 360cfm.
  5. V-Drives
    Sorry don't mean to bring up a stupid question but I am having a hard time figuring out which ngk plug replaces the ac delco r44ts? it says the BPR5fs which I cant find , so I looked at the cross reference chart and they have a ur5 which one chart says is the ac delco r44ts then one says its the...
  6. 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.
  7. 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
  8. GN7 On the Dyno
    All other plugs look ok but compression on is 30, 60, 90, 95.. after that I didn`t need to test the others. 540ci 8.0:1 Iron Dart Eagles 345, no intercooler. Daytona boxes for ignition, with 3D map running off a map sensor. At 5000 rpm I have it set to @32* , 5500 34* and at 6000 35* Full time...
  9. 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.
  10. GN7 On the Dyno
    Just checked the plugs after the first time on the water with new motor. Here's what I saw ... the plugs range between between these two. Thoughts?
  11. GN7 On the Dyno
    Im still having the issue I posted about earlier with a hot spark then it dwindles or doesn't spark at all. Question, has anyone ever diagnosed a bad coil wire that prevented the engine from firing? I can get one or two cylinders to fire but it just cranks after that. Ive replaced the batteries...
  12. V-Drives
    Hey guys just signed up finally, lots of great info here. I've got a 70 Sanger 17-10 with a merc 454 with 427 heads, tunnel ram with two holleys and a vertex mag. It's got autolight 404 spark plugs in it now and I want to put new plugs. What are good plugs to use. I'm not a fan of autolights.
  13. 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...
  14. GN7 On the Dyno
    hoping some experience will point me in the right direction . I have a 460 with red msd 6-a box and dist. and blaster coil , all quite old . last few days ,boat fires up runs for a bit then quits ,no spark. By the time i get home ,it fires up. Does this sound like a failing box , or coil ?Thanks
  15. GN7 On the Dyno
    What spark plug should be used in a 426 hemi with a 8:71 blower making about 5 lb. of boost. Dynoed at 800HP. Gas is 110 octane leaded. Motor came with Accel 111 plugs, but they are no longer available.
  16. Parts for Sale
    sold 2 10" spark arrestors for 4150 carbs I bought these to put on my blower motor but the would not fit because my center to center spacing was 8 3/4" and it was too close. You could modify them . I chose to run a billet one instead. Will separate $100 each or $175 for both Steve (509)430-7733
  17. 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
  18. V-Drives
    Wondering what would be a good spark plug for blown gas 489 ci. BBC was running auto lite 26 in the old aspirated set up probably kneed to go cooler. So whata ya runnin?:hmmm:
  19. 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...
  20. 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...
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