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Thread: Tunnel Ram Tuning Tips

  1. #21
    396_WAYS_TO_SPIT
    Since were on the topic, I have dual holley 750's dp going on my 454. They have 4 corner idling circuts. Is there a difference in tuning? If so please shed some light on this for me when I fire up my new motor.
    Motor is a bbc 454 .30 over with 11-1 comp,weiand tunnelram,msd-(dist-cap-coil-wires-6al), DRY headers,cam(256@.50,soild,.615 lift,108 lobe).
    I have printed all the above info because my "other" boat(455 olds) has dual 600's vac sec on it and I can use it for refrence. I just need some refrence for my 454 now
    396

  2. #22
    Senior Member
    Join Date
    Apr 2010
    Posts
    2,920
    Yeah, we're best buddies now Chet. Here's your sandwich.
    http://www.subway.com/APPLICATIONS/M...eyBreast-1.jpg
    Hope turkey's o.k.? Couldn't find the ham.

  3. #23
    BigBlockBaja
    I'll take that sandwich if Chet dont want it..

  4. #24
    Danhercules
    common dan, wheres the beer? i gave you all you wanted a few weeks ago!!

  5. #25
    Junior Member
    Join Date
    Nov 2013
    Posts
    1
    Hi everyone, I was wondering if EASYSTROKE ever got his Holley 600 vac. sec. carb's worked out. I realize that this post is years old, but I too now have a 18' 86 Caribbean jet boat now and I just built a fresh 467ci BBC with a tunnel ram intake with a pair of 600 cfm Vac. secondaries #4160 and all is great, BUT I've been chaseing a WOT miss. It's driving me nuts!@..LOL I really enjoyed reading Hotcrusader76 information, I would love to hear from you guys. I have #69 jets up front I have opened up the (PVCR) from .041 to .050 to just enrichen the primary side at WOT. I have a 6.5 pv in and crusing is great at 3,000-4,000 it has 12" hg, and the vac sec. are opening on time and staying open. My only concern is it's not hitting clean on all 8 at WOT, to me it feels like it still wants more fuel.. Secondary jet size is 81, I have installed the Quick Fuel metering plates in the rear with jet extensions. Total timing is @ 36deg. -6 fuel line to a Holley reg. right beside the carb's with -6 hard line to each carb primary bowl. I didn't build a "killer" engine, just want it to look good and run good, cam is from Comp. .578 lift & 244@.050 110 LSA. jet boat cam rpm is 2,500-6,500...I see 5,500 and that's it, but that's ok, I just want it to hit clean at that rpm. Any info would be great, thanks.....Hans

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