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Handi-Crack

  • Karma: +3/-0
455 sizes
« on: August 30, 2014, 11:59:13 AM »
How big can you take a 455 to? Trying to read up but it's all related to cars not jets.

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  • Boat #1: 75 wriedt mavrick
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GlassCutter

  • Karma: +31/-0
Re: 455 sizes
« Reply #1 on: August 30, 2014, 12:35:34 PM »
Just depends on how much pain your wallet can take.  It really isnt a design that lends itself well to high rpm or high horsepower. Bearing speeds get insane and not a lot of aftermarket support either.  But Bulldog, Rockett and others can build you 500+ if'n you really want it.

Sent from my SGH-T999 using SoCal Jet Boats mobile app

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  • Boat #1: 1973  Wriedt Montara 23
  • Boat #2: 1978 Spectra 20 460/Berkley
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Also, I will kiss bare male ass in the middle of the Vegas Strip  . . .  I will post pics if I need to.  --  IRRebel 2013

"Go ahead Rivertard does it.  Take a video though."

"If you did it in a dodge it would have shifted perfectly ran a thousand miles per hour and got optimum fuel mileage!"  Nordie  2012

MPKardell

  • Karma: +1/-0
Re: 455 sizes
« Reply #2 on: August 30, 2014, 12:35:57 PM »
I think old man Mondello used to say up to 0.100" with a sonic (wall thickness) test.  But I don't recall if he mentioned what the minimum wall should be.  Certainly 0.060" is safe.  Thousands of 455 jets running a 0.060" overbore.
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Handi-Crack

  • Karma: +3/-0
Re: 455 sizes
« Reply #3 on: August 30, 2014, 12:43:53 PM »
So 30 over would be a real safe number and allow more power and torque. Plus it would be a little easier on the wallet
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MPKardell

  • Karma: +1/-0
Re: 455 sizes
« Reply #4 on: August 30, 2014, 01:03:49 PM »
Yes.  Way safe.  Concentrate on oil control, which has been hashed to death over and over on this and other forums.
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