Results 1 to 9 of 9

Thread: Cam Timing

  1. #1
    Club Member TWOBEERS's Avatar
    Join Date
    Nov 2007
    Location
    Roseville
    Posts
    703

    Default Cam Timing

    I have to change the timing chain in my firebird as the old one has too much slop. When doing so I'm considering advancing the cam timing. Right now the stall I have is flashing at 4100. According to the cam card I should be in the power starting at 3400, but yet it still seems to lug out of the hole off of the tbrake. I'm considering advancing the cam 4 degrees to try and bring the power down in the rpm some, trying to avoid what I probably really should be doing which is pulling the converter and getting it reflashed. anyone ever play with cam timing, and what kind of change did you see?
    Not a mustang!, 84 TransAm street car! 350 SBC on E85, Dart heads, T400, ford 9"

  2. #2
    Club Member AutoRoc's Avatar
    Join Date
    Nov 2003
    Location
    Dearborn
    Posts
    5,191

    Default

    Where is it shifting at? Are you thinking of tightening the converter?

    No experience doing that but 4000-4500 stall is about ideal for a hot streetcar. It leaves room for nitrous (flash 5000-5500) when you are shifting near 7000rpm. Tighter than 4000 to me is "not really trying to 60ft" territory.
    Denny Villemure
    PSSSSSSST!
    Vortec 4200 Turbo IROC-Z on 15psi
    11.26 @ 126mph

  3. #3
    Club Member
    Join Date
    Nov 2003
    Location
    Rochester Hills
    Posts
    4,186

    Default

    I advanced mine 4 degrees on my old 340 cuda but was only running about 3000 stall and needed bottom end help. Mine was not a very strong engine and I have to say I couldn't really notice a difference, but I don't consider my experience to be typical. Wow, wasn't that helpful??

  4. #4
    Club Member DRAG-ULA's Avatar
    Join Date
    Apr 2009
    Location
    Smokin' cigarettes and watchin' Captain Kangaroo
    Posts
    3,775

    Default

    We messed with cam timing on a big Mopar on the dyno at work. There wasn't a huge difference in the range, torque came in 3-400 lower than before. I'd say as long as your have enough piston to valve clearance, advance it.
    I used to be 'with it'. Then they changed what 'it' was. Now what I'm 'with' isn't 'it', and what's 'it' seems weird and scary to me.......



    1948 Dodge B1 pickup

  5. #5
    Club Member 1BADAIR's Avatar
    Join Date
    Nov 2003
    Location
    cardboard box
    Posts
    27,730

    Default

    Probably won’t change a lot. May also make it more timing sensitive
    A gun is like a parachute. If you need one, and don't have one, you'll probably never need one again.

  6. #6
    Club Member TWOBEERS's Avatar
    Join Date
    Nov 2007
    Location
    Roseville
    Posts
    703

    Default

    Iím shifting at 7200. Sounds like from what Iím hearing, itís not going to make enough difference for what Iím looking for. Iím probably going to have to get the converter reflashed . Just looking at all my options. Had a converter that flashed at 5200 that worked good. That converter took a shit. Had to get one with a billet front plate. And wanted something a little more Street friendly, which it is. But has killed my 60 foot times. Thanks for the info.


    Sent from my iPhone using Tapatalk
    Not a mustang!, 84 TransAm street car! 350 SBC on E85, Dart heads, T400, ford 9"

  7. #7
    Club Member
    Join Date
    Nov 2003
    Location
    Rochester Hills
    Posts
    4,186

    Default

    Good luck with it. Let us know how it turns out.

  8. #8
    Club Member AutoRoc's Avatar
    Join Date
    Nov 2003
    Location
    Dearborn
    Posts
    5,191

    Default

    Oh you are in the perfect ballpark to hit it with a 200 shot. It will flash you up to 5000 and away you go.
    Denny Villemure
    PSSSSSSST!
    Vortec 4200 Turbo IROC-Z on 15psi
    11.26 @ 126mph

  9. #9
    Club Member TWOBEERS's Avatar
    Join Date
    Nov 2007
    Location
    Roseville
    Posts
    703

    Default

    Quote Originally Posted by AutoRoc View Post
    Oh you are in the perfect ballpark to hit it with a 200 shot. It will flash you up to 5000 and away you go.

    Yea, Id like too, but right now I've got too many other big projects going on. And I really want to get the chassis up to par before I start adding a lot more power. Also would have to do a cam swap. This cam is a great N/A cam, but wont work with juice. So for now the car is basically status quo. Maintain it and enjoy it.
    Not a mustang!, 84 TransAm street car! 350 SBC on E85, Dart heads, T400, ford 9"

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •