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Old 10-29-2019, 11:33 PM   #15
Synchro909
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Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,496
Default Re: What do I need to do to get a reliable engine?

I build my own engines for FAR less than what the workshops cost. For long distance (longest single trip I've done is 15,000 miles while towing), I go all the way for a little more get up and toughness. Whatever you do, don't drill the original Model A crank shaft for oiling the mains. You'll almost certainly have it break on you. Here's what I do
  • New counter balanced crank
  • New rods
  • Inserts all round
  • Pressure feed the middle main bearing only
  • Full flow oil filter.
  • Air filter
  • Down draught carb (Ex Holden Grey Motor Stromberg but weber is OK)
  • Opened up inlet manifold
  • 5.5:1 head
  • Improved cam (about the same timing as an IB 330 but only 0.290" lift).
  • Lightened flywheel
  • Very importantly, properly balanced
Those motors are backed up by a Mitchell O/D so when I'm travelling at 50mph, the motor is turning at the rate a standard transmission would have it at 40mph. It does that all day, every day for many thousands of miles
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Last edited by Synchro909; 12-03-2019 at 04:38 AM.
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