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  #51  
Old 07-24-2018 | 09:14 AM
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Originally Posted by KernowDiscovery
Interesting read..

https://www.offroaddiscovery.com/201...nd-replacement

CollieRover, did you have to have your ECU remapped or did you use the same MAF?
My ECU is original, have not changed it. I would love to have Tornado systems do the remap, but it’s $500 that I have other projects for, and I don’t think anyone does it stateside.

Mine is an ‘03 so I did not change MAF. I think you’d be fine with a 4.0 upgraded block/heads, unless you feel the extra HP would be money well spent. You could ask Turner how much more the 4.6 puts out. The torque is more important than the HP on these boats anyway.
 

Last edited by CollieRover; 07-24-2018 at 09:30 AM.
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  #52  
Old 07-24-2018 | 11:16 AM
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The 4.0 would probably last longer.
 
  #53  
Old 07-24-2018 | 11:18 AM
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Originally Posted by CollieRover

The torque is more important than the HP on these boats anyway.
Boat is the word! Thanks CollieRover
 
  #54  
Old 07-24-2018 | 11:19 AM
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Originally Posted by Dave03S
The 4.0 would probably last longer.
Curiouser and Curiouser..... why's that?

I just had a colleague tell me that I'm the strangest girl he's ever known haha.. He said 'you've had nothing but problems with that Rover since you bought it and you want to put a new engine in it??!??'

I told him it was a love/hate relationship. All the way.
 
  #55  
Old 07-24-2018 | 11:37 AM
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Originally Posted by KernowDiscovery
Boat is the word! Thanks CollieRover
B.o.a.t most certainly applies to LR!
Break out another thousand
 
  #56  
Old 07-24-2018 | 11:38 AM
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Originally Posted by KernowDiscovery
Curiouser and Curiouser..... why's that?

I just had a colleague tell me that I'm the strangest girl he's ever known haha.. He said 'you've had nothing but problems with that Rover since you bought it and you want to put a new engine in it??!??'

I told him it was a love/hate relationship. All the way.
$ and dependcy wise, I'de be following ACEngineer's LS3 engine swap conversion.
 
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  #57  
Old 07-24-2018 | 11:47 AM
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Originally Posted by Sixpack577
$ and dependcy wise, I'de be following ACEngineer's LS3 engine swap conversion.
will do - thanks!
 
  #58  
Old 07-24-2018 | 12:30 PM
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Boring the 4.0 out to a 4.6 combined with the old out of tolerance tooling toward the end of the production run is what led to the block being thin walled and prone to cracking. Add heat and cooling expansion contraction cycles over the lifetime and the Discovery 4.6 was pretty much doomed after they stopped paying attention to quality control. That is why some who want a 4.6 choose to rebuild one from a P38. Better tooling and more quality control between 98 and 02.
 

Last edited by Dave03S; 07-24-2018 at 12:32 PM.
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  #59  
Old 07-24-2018 | 01:04 PM
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Originally Posted by Dave03S
Boring the 4.0 out to a 4.6 combined with the old out of tolerance tooling toward the end of the production run is what led to the block being thin walled and prone to cracking. Add heat and cooling expansion contraction cycles over the lifetime and the Discovery 4.6 was pretty much doomed after they stopped paying attention to quality control. That is why some who want a 4.6 choose to rebuild one from a P38. Better tooling and more quality control between 98 and 02.
I thought it was the crankshaft that increased it to 4.6. At any rate, my 4.6 went 120k before going because I neglected the Thermostat. So I don't worry about it, but I am not an engineer.
 
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  #60  
Old 07-24-2018 | 01:52 PM
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Originally Posted by CollieRover
I thought it was the crankshaft that increased it to 4.6. At any rate, my 4.6 went 120k before going because I neglected the Thermostat. So I don't worry about it, but I am not an engineer.
I'd hazard a guess that my engine is shot at 168k because I neglected the thermostat and have been on this forum reading posts for oh, I don't know.....how long?..

Years.

and I'm an 'engineer'.. but a different type that inwardly cringes when someone tells me that gravel makes a great driveway because it hides oil leaks.

This mechanical stuff is greek to me but I am sloooooooowly learning...
 



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