Robert Davis 3.0L GM conversion - Defender Source
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  #1  
Old March 4th, 2016, 11:18 PM
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Robert Davis 3.0L GM conversion

Anyone have experience with Robert Davis 3.0 liter GM conversion engine, 140 HP 186 ft lbs of torque. This would be a bolt on replacement for a RHD 110 with a current 2.5 Petrol. Any advice or comments?
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  #2  
Old March 4th, 2016, 11:22 PM
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Hahahhahahahahahaahaha
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  #3  
Old March 4th, 2016, 11:26 PM
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very helpful
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  #4  
Old March 4th, 2016, 11:35 PM
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You mean this guy:
http://www.defendersource.com/forum/...inva-1101.html
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  #5  
Old March 4th, 2016, 11:37 PM
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That is him I have talked with him about his conversions both Isuzu 2.8 L and GM 3.0 but wanted to talk with someone that has one of his engines
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  #6  
Old March 4th, 2016, 11:38 PM
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Daniel, did you read that 3.0 conversion on LRFAQ?

I didnt think he was still pushing that on folks.
There are better options available these days.

He's probably in the garage right now planning the next great motor swap!

.
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  #7  
Old March 4th, 2016, 11:38 PM
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Quote:
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very helpful
He is laughing because Robert is one of the biggest contributors to this forum and the community in general. You can trust whatever he tells you.
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  #8  
Old March 4th, 2016, 11:42 PM
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I did talk with him and read LRFAQ. He seems like a great guy and has a great reputation. But before i spend 5 K plus just looking for more info from someone that has an engine.
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  #9  
Old March 4th, 2016, 11:43 PM
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Quote:
Originally Posted by generalcutter View Post
That is him I have talked with him about his conversions both Isuzu 2.8 L and GM 3.0 but wanted to talk with someone that has one of his engines
I hear the 3.0 Iron Duke he did is a 100mph setup, I believe it has a boat CRANKshaft, not camshaft. I've heard enough about this setup from Brandon. Sounds like a decent setup, not sure I would ever venture into it, but seems interesting.

A 109 that has it, just sold in Omaha, heading to NY now I think.
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Old March 4th, 2016, 11:46 PM
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Stick with your diesel plan.
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  #11  
Old March 5th, 2016, 03:11 AM
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Quote:
Originally Posted by generalcutter View Post
That is him I have talked with him about his conversions both Isuzu 2.8 L and GM 3.0 but wanted to talk with someone that has one of his engines
I have rode in his Isuzu converted 110. Great conversion... Really fast.
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Old March 5th, 2016, 07:40 AM
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Having a direct hand in the 3.0 conversion I can state it is a great option. Dead simple, good torque, reliable and drops in easily. Anyone that had the opportunity to ride in or drive 'Peppy" knows how fun it is. I believe he has 2 engine kits left. I know everyone here loves a LR diesel (go figure) but a 140hp 4 cylinder that can be repaired from parts on most auto supply shelves anywhere is hard to beat. I built one for my '71 IIA before I swapped over to the 4.3 V6 which was a much bigger undertaking. There are other Robert Davis options such as the Isuzu or Iveco which perform much stronger than the LR diesels. Then there is the latest craze being the LSx platform. I started a LS1 project in my IIA (possibly the first LSx conversion) years ago and am only get back to it after years of other things taking precedence.
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  #13  
Old March 5th, 2016, 09:27 AM
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  #14  
Old March 5th, 2016, 11:28 AM
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Quote:
Originally Posted by generalcutter View Post
But before i spend 5 K plus just looking for more info from someone that has an engine.
If that's your budget, you should seriously look at the LS Gen III or IV option. More work admitted but HP wise, oh so much more fun

If you want to keep it budget tight, I think 3-4k would see a good used 5.3 LM7 between the frame rails with a NV4500 behind it like my D100 build. Apart from having to make some schedule 40 exhaust manifolds, the rest of the install is fairly bolt on.
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  #15  
Old March 5th, 2016, 12:17 PM
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Daniel,

Although I don't have many miles on my 200 conversion I like it and I am not a fast driving guy so it suits me. I chose it because I hope at some time soon I can go on a worldly adventure and diesel seems to be the way to go for that. If you are just going to stay in the States and go to the soccer games with the kids and a summer camping trip petrol is fine. IMHO.

There are lots of options for engines. Timm Cooper just built up yet another creation a 109 in which he put in a built Chevy 250 straight 6. I would imagine you would have to change the bulkhead in a 110 to fit but maybe there is enough room with the engine mounts moved forward? I don't have a Defender to know.

Anywho here's a link to some videos of his yellow 109 on the Rubicon. https://www.facebook.com/forbynbrosllc?ref=tn_tnmn

Just pointing out another option. Bottom line is do what you want, it is your rig.
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