« previous next »
Pages: [1]   Go Down

Author Topic: 390 flywheel  (Read 5551 times)

0 Members and 1 Guest are viewing this topic.

Offline FlatheadPuller

  • Turf Warrior
  • **
  • Posts: 967
  • Karma: 12
  • Gender: Male
    • View Profile
390 flywheel
« on: September 15, 2012, 04:24:04 pm »
Anybody have a 390 flywheel they can measure the O.D.  of and the thicknes when laying on a bench. Otherwise I have to take my engine of and dismantle to measure my flywheel. Mine is an electric start as well.

Thanks  Dennis
Logged
Dennis Bazzett
Grandville Michigan

Offline cubcadet70

  • Turf Warrior
  • **
  • Posts: 156
  • Karma: 0
  • Gender: Male
    • View Profile
Re: 390 flywheel
« Reply #1 on: September 16, 2012, 10:39:25 pm »
How accurate measurement do you need? I've got my GX390 engine out right now. I can measure it for you. The 3 hole hub is taller than the edge. I'm guessing your gonna make a billet steel flywheel?
Logged

Offline FlatheadPuller

  • Turf Warrior
  • **
  • Posts: 967
  • Karma: 12
  • Gender: Male
    • View Profile
Re: 390 flywheel
« Reply #2 on: September 18, 2012, 07:22:26 pm »
Yes I am having a steel wheel made. Just bought a piece of 4140 for it. Building a new altered engine for my son.
Logged
Dennis Bazzett
Grandville Michigan

Offline cubcadet70

  • Turf Warrior
  • **
  • Posts: 156
  • Karma: 0
  • Gender: Male
    • View Profile
Re: 390 flywheel
« Reply #3 on: September 18, 2012, 08:47:24 pm »
Are you going to use the crank trigger set up?

I'm building me a 8hp GX240 Honda alter right now and was gonna use the ARC racing billet flywheel and a MWSC 14lbs front pulley and should bring me around 18ish pounds of rotating assembly.  If that's not enough I'll have a 8" 20 lbs flywheel and machine it for a browning taper hub to put on my PTO.
Logged

Offline FlatheadPuller

  • Turf Warrior
  • **
  • Posts: 967
  • Karma: 12
  • Gender: Male
    • View Profile
Re: 390 flywheel
« Reply #4 on: September 18, 2012, 09:07:45 pm »
It will use a crank trigger but I will make my own. The ports on this dupor head I have are very nice. They have lots of potential. He has to run a stock cam but compression will be high with good springs and port work with a kohler 1.0 carb on a 4 inch spacer.
Logged
Dennis Bazzett
Grandville Michigan

Offline cubcadet70

  • Turf Warrior
  • **
  • Posts: 156
  • Karma: 0
  • Gender: Male
    • View Profile
Re: 390 flywheel
« Reply #5 on: September 18, 2012, 09:53:25 pm »
I would upgrade to a GX390 Honda cam.  Yes the ports are very nice in these GX390! I've ported a few. I can get my GX390 to 6800 RPMs with single HD springs. That's just with milled head and ported ports and stock size valves and carb.
Logged
Pages: [1]   Go Up
« previous next »
 

anything