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  #641  
Old January 13th, 2015, 04:31 PM
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John B.
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The top gear should be set to work on the flats at constant speed, for maximum efficiency. It then shifts down for hills and accelerating. Top gear should never be chosen for climbing.
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  #642  
Old January 13th, 2015, 04:42 PM
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Jonathan, you could compare the gear ratios and engine power to your LR4 to get a frame of reference. They probably have about the same "resistance" at highway speed (LR4 a little sleeker, 110 a little lighter).

LR4 ratios

1st: 4.17
2nd: 2.34
3rd: 1.52
4th: 1.14
5th: 0.87
6th: 0.69

Transfer case high range 1:1, low range 2.93:1

Diff ratio: 3.54

30" tall factory tire

LR4 5.0 V8 is 375hp/375tq

Anyone who has driven an LR4 knows how magnificent this powertrain is... an LS/6L80 swap would basically emulate it in a Defender
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  #643  
Old January 13th, 2015, 04:50 PM
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What is "normally" done to proper size the final drive.... Work out the power required to move the vehicle versus speed. Find out the wheel power available versus speed. Decide on a maximum speed you want to be able to maintain, on the flat, with no wind without dropping down a gear. Plot and adjust final drive to suit. This gives you the best mileage.

I suspect with this engine, you can't go high enough on the gearing.

Like this:
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  #644  
Old January 13th, 2015, 06:24 PM
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Great info. I assumed that GM had that already figured out, that's why I was trying to match my RPM @ 70 mph to what they used, hoping to be in the right ballpark.
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  #645  
Old January 13th, 2015, 06:39 PM
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It takes a lot more power to move a Defender down the road at 70 compared to a camaro. But, there's probably power to spare at that RPM so you should be OK!
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  #646  
Old January 13th, 2015, 06:41 PM
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Quote:
Originally Posted by transientmechanic View Post
It takes a lot more power to move a Defender down the road at 70 compared to a camaro. But, there's probably power to spare at that RPM so you should be OK!
Good info and food for thought! With my rack loaded, I think I have the drag coefficient of a house! ;-)
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  #647  
Old January 13th, 2015, 08:53 PM
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If I can run 90 with a TDI and a 1.2 you can run 75 with the 6.2 and any gearing.
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  #648  
Old January 13th, 2015, 09:02 PM
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Quote:
Originally Posted by Red90 View Post
If I can run 90 with a TDI and a 1.2 you can run 75 with the 6.2 and any gearing.
Its not an if question of possibility, but efficiency.

-Jeff
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  #649  
Old January 13th, 2015, 09:04 PM
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As I explained earlier the higher the gearing the better for efficiency. There is no way to have gearing that is too high with that much power and the options available. Should run a 1.0 high range.
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  #650  
Old January 13th, 2015, 09:59 PM
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I believe the 1.003 high range gears are still available new... hopefully they are not just limited supply NOS. As this conversion continues to build momentum there will probably be a strong demand.

By the way, on a slightly different note... the ultimate LT230 would be 1.003 high, 49% reduction (5:1) low, and limited slip center diff!
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  #651  
Old January 13th, 2015, 10:16 PM
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Quote:
Originally Posted by transientmechanic View Post
and limited slip center diff!
Already available from Ashcroft......

http://www.ashcroft-transmissions.co...-atb-diff.html
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  #652  
Old January 13th, 2015, 10:27 PM
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Yes quaife and ashcroft have both had them for some time all parts quoted in the above LT230 build are currently available in the aftermarket.
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  #653  
Old January 22nd, 2015, 12:36 PM
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went out for my first test drive with the newly LS powered 110…

Initial impressions…


HOLY SH$#T!!
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  #654  
Old January 22nd, 2015, 12:37 PM
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Originally Posted by phoenix37 View Post
went out for my first test drive with the newly LS powered 110…

Initial impressions…


HOLY SH$#T!!
I am jealous!
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  #655  
Old January 22nd, 2015, 12:45 PM
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trust me its worth the wait and you are well on your way… My NAS 110 always felt like a slug…this thing rips! time to invest in some better brakes!
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  #656  
Old January 22nd, 2015, 12:52 PM
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Originally Posted by phoenix37 View Post
trust me its worth the wait and you are well on your way… My NAS 110 always felt like a slug…this thing rips! time to invest in some better brakes!
Sounds great! Enjoy that beast!
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  #657  
Old January 22nd, 2015, 12:57 PM
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Never happened without pic's & video
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  #658  
Old January 22nd, 2015, 01:05 PM
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Never happened without pic's & video
soon enough.. need to button everything up now that i know i wont have to tear it down again .. running without a trans tunnel for example
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  #659  
Old January 27th, 2015, 02:37 PM
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John B.
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Quote:
Originally Posted by Red90 View Post
What is "normally" done to proper size the final drive.... Work out the power required to move the vehicle versus speed. Find out the wheel power available versus speed. Decide on a maximum speed you want to be able to maintain, on the flat, with no wind without dropping down a gear. Plot and adjust final drive to suit. This gives you the best mileage.

I suspect with this engine, you can't go high enough on the gearing.
So I had played around with a curve for the 2.5 NA yesterday and thought, why not plug in the GM engine...... So with the 1:1 high range, you will be able to do 100 mph before needing to shift down.... Top speed in 4th around 130 mph.

edit: added the 6.2, LS3. Say 105 mph before shifting down and 140 mph top speed.
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  #660  
Old January 27th, 2015, 05:01 PM
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Can you do the LC9 stock diff gears 1.4 TC and 34" tires
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