Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: Any projection experts out there???
          
   
   

Reply To Thread
Results 1 to 4 of 4
  1. #1
    Mike P's Avatar
    Mike P is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2003
    Location
    SW Arizona
    Car Year, Make, Model: 57 Ply, 68 Ply Valiant, 83 El Camino
    Posts
    3,747

    Any projection experts out there???

     



    Got a couple of questions about the Holly projection setup.

    Primarly I'm wondering who versital the programing is, and what is required to change it if necessary for different altitudes and and temperature ranges. i.e. would it require reprograming in a temperature range from 60 degrees to 120 degrees and altitude changes from 5000 feet to 1000 feet (it's for a stationary 454).

    Does anybody know of a WEB site that can give the tech information on the system.

    Thanks
    I've NEVER seen a car come from the factory that couldn't be improved.....

  2. #2
    mrmustang's Avatar
    mrmustang is offline Global Moderator Lifetime Contributor Visit my Photo Gallery
    Join Date
    Apr 2001
    Location
    Greenville
    Car Year, Make, Model: 1970 GT 350 convertible, 289 FIA
    Posts
    1,452

    Mod note: moved to engine tuning
    Instead of being part of the problem, be part of a successful solution.

  3. #3
    Mike P's Avatar
    Mike P is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2003
    Location
    SW Arizona
    Car Year, Make, Model: 57 Ply, 68 Ply Valiant, 83 El Camino
    Posts
    3,747

    We've got a 454 in a stationary applications to power various pieces of equiptment. The whole setup is occcasionally relocated to different locations where can be a pretty wide variance of elevation and temperature from one to another. One month it might operate at all day long at an elevation of 1500-2000 feet and the day time temp might not get above 60 degrees, and next month it could be at a location that's at 5000 feet and the temp will be 120 degrees by noon.

    It currently has a carburator (which with those extremes should really be rejetted to run properly at the differnt extremes). There has recently been some discussion about switching to a sytem such as the projection in order to overcome this. The main thing I'm trying to figure out is wether there would still be tuneability issues. I.E. would the system have to be "re-programed" for the different extremes or is the programing versital enough to compensate.
    I've NEVER seen a car come from the factory that couldn't be improved.....

  4. #4
    robot's Avatar
    robot is offline CHR Member Visit my Photo Gallery
    Join Date
    Feb 2004
    Location
    Tucson
    Car Year, Make, Model: 39 Ford Coupe, 32 Ford Roadster
    Posts
    2,334

    If you havent found it yet, here is the manual for the unit.

    http://www.holley.com/data/Products/...7-6%20scan.pdf

    It's a pretty crude unit, the only sensor is a coolant temperature input (plus an optional oxygen sensor input). There is some limit to the horsepower rating, I think. The stock Chev TBI unit is more sophisticated but I dont know how well the Chev unit would do in a stationary application (usually stationary apps run constant rpm). There is also the Chev marine TBI that you see on egay sometimes. All would probably be better than a carb anyway.... is cost a factor?

    A better solution is the Edelbrock TBI...there is one on egay (item 290135644662). These units have a MAP sensor and an air temp sensor so they would be much more flexible. The price is higher though. It uses a GM controller.

    mike in tucson
    Last edited by robot; 07-12-2007 at 09:11 AM.

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink