Results 1 to 10 of 10

Thread: Timing question

  1. #1
    Junior Member APPRENTICE
    Join Date
    May 2009
    Posts
    10

    Timing question

    How much in reality 5 degrees advanced timing will affect?
    cam card says that it must be 112 centerline but i only managed to time it 117
    centerline without buying any new parts. if i will buy new geardrive it will be 0nly 1 degree off. is there any real difference? engine is 540 bbc with 300 hp on nitrous. ( total 1100 hp)

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2007
    Location
    Lost Creek, WV
    Posts
    533
    This is just my opinion. I can't imagine a set up being 5 degrees off and not being able to correct it unless it was assemble wrong by mistake. And BTW if you are at 117 and it's supposed to be 112, then it's retarded 5 degrees. I'd take it apart and realign everything and try it again.

    TS1955

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Jan 2012
    Posts
    628
    X 2 . . . . . . . . . Read the instructions . . again . . something ain't right . .

  4. #4
    Senior Member MASTER BUILDER
    Join Date
    Jan 2008
    Location
    Yooper
    Posts
    168
    X3

  5. #5
    Member MASTER JOURNEYMAN
    Join Date
    Jan 2008
    Location
    Brandon MS
    Posts
    47
    it will run like a turd at 117.... Fix it now and thank us later

  6. #6
    Senior Member DYNO OPERATOR
    Join Date
    Jan 2004
    Location
    central Illinois
    Posts
    459

    timing

    If it is off 5 degrees retarded I would think you would not have enough exhaust valve to piston clearance and chance severe damage to your engine.

    Most good gear drives, belt drives and quality timing chain sets have adjustment of at least plus or minus 8 cam degrees.

    I suggest you consult with a local high performance engine builder to solve your problem before spending any additional money on parts.

    It is possible the cam is ground incorretly too.

    You need to be within 2 degrees of your spec on intake centerline to get your combination to run to its potential.

  7. #7
    Senior Member SENIOR BUILDER
    Join Date
    May 2006
    Location
    Pikeville KY
    Posts
    109
    My new comp. cam was the same way. It was supposed to be installed at 112 and when I put it in straight up it was at 118. Had to move the crank gear and put a button in cam gear to get it right. Comp say's it must have been a grind issue, however refused to send me another camshaft. This makes two different comp. cams that we have had this issue with. I think that erson will be my next cam choice.....
    OSCA PROSTREET CHAMPION 2006
    [email protected] 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00

  8. #8
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
    Join Date
    Mar 2008
    Location
    Emmett, Idaho
    Posts
    7,334
    I'm thinking Comp Cams is forgetting that all important 'customer service' aspect. Must've gotten so big that a few dissatisfied customers can be swallowed no prob........
    TRUTH is HATE
    to those who
    HATE TRUTH

    God Bless our folks in uniform
    "We the People, have your backs"
    http://www.racingjunk.com/profile/279898

  9. #9
    Junior Member APPRENTICE
    Join Date
    May 2009
    Posts
    10
    ok. thanks guys. seems to be comp cams bad then. will buy this offset cam gear set then.

  10. #10
    Senior Member DYNO OPERATOR
    Join Date
    Jul 2003
    Location
    Chelsea Oklahoma
    Posts
    558
    we only use lunati cams.. only


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy