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  #1  
Old October 14th, 2014, 01:27 AM
Gish
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David
1987 Defender 110 Ex Batus
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What to expect with a 2.5 NA and LT77

Sorry for the newb question but I was out the other day with a friend and he was complaining I wasn't fast (Yes I know the 2.5 is slow) but according to the speedo I was doing 100kph in the flats.
Well turns out my speedo cable was reading 10km faster when measured vs GPS so I really only was doing 90 when it says 100. Of course I can't seem to push past except on downhills.

Is this expected behavior? I know the engine is only a 68hp but shouldn't I be able to at least do 100kph on the flats?
It's a 2.5NA with a military Lt77 box.
Cheers
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  #2  
Old October 14th, 2014, 02:08 AM
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Ron
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that's just about exactly what i get, with the same drivetrain....

i can push it past 110Kph downhill, but just barely.

someone tell me why i chose to live on the TOP of a mountain again.....
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  #3  
Old October 14th, 2014, 04:16 AM
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Chris
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My 110 CSW had a 2.5 NAD with 1.6. My wife's go to joke was to take a picture of whoever we passed (to prove we passed someone), and suggested we ask if they need help.
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  #4  
Old October 14th, 2014, 06:16 AM
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Raub A.
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The best upgrade you can do to a 2.5 n/a is to yank it out of your truck as fast as you can, sell it to Newman, then put a 200Tdi in it.
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  #5  
Old October 14th, 2014, 07:35 AM
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David Short
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Poor Newman ......
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  #6  
Old October 14th, 2014, 07:40 AM
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Robert Davis
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I was driving a 2.5 N/A years ago and a after I pulled out on the interstate highway, a car 5 miles back almost ran into the back of us.

Was thankful because it prompted me to look for a faster engine and thus became the genesis for all the engine conversions that I have built over the years.
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  #7  
Old October 14th, 2014, 08:14 AM
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I drive a 110 2.5na as often as I can. She's old now so I don't take her out in the rain anymore. GPS says I hit 63 on this one flat stretch consistently. But to be honest it is really only comfortable to cruise at 55 and in the right lane. I no longer fight it and seem to enjoyed 100x more now.

Clay
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  #8  
Old October 14th, 2014, 08:16 AM
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shayne young
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Quote:
Originally Posted by rongoms View Post
that's just about exactly what i get, with the same drivetrain....

i can push it past 110Kph downhill, but just barely.

someone tell me why i chose to live on the TOP of a mountain again.....
So you can LEAVE home really quickly..???

------ Follow up post added October 14th, 2014 08:18 AM ------

Quote:
Originally Posted by rdavisinva View Post
I was driving a 2.5 N/A years ago and a after I pulled out on the interstate highway, a car 5 miles back almost ran into the back of us.

Was thankful because it prompted me to look for a faster engine and thus became the genesis for all the engine conversions that I have built over the years.
And still not finished until being helped at an overland expo event...
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  #9  
Old October 14th, 2014, 08:18 AM
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Chris
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Quote:
Originally Posted by the rover shop View Post
So you can LEAVE home really quickly..???
So you can go downhill really fast
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  #10  
Old October 14th, 2014, 10:30 AM
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John B.
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You should be able to maintain 100 comfortably if everything is fine. The 110s with the 1.667 transfer case are a bit limited by the gearing. 100 km/h is 3200 rpm. With my 90 and the 1.4, I could sit at 110 km/h as long as it was flat and there was no head wind.

I would look at the timing. If it is retarded a bit, then the engine won't want to rev up properly. If you want, we could get together and I could have a look.
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  #11  
Old October 14th, 2014, 11:19 AM
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Quote:
Originally Posted by Red90 View Post
You should be able to maintain 100 comfortably if everything is fine. The 110s with the 1.667 transfer case are a bit limited by the gearing. 100 km/h is 3200 rpm. With my 90 and the 1.4, I could sit at 110 km/h as long as it was flat and there was no head wind.

I would look at the timing. If it is retarded a bit, then the engine won't want to rev up properly. If you want, we could get together and I could have a look.
Yep, I'll keep it simple and change the tcase ratio way before throwing good moo-la at a tdi to get an extra 10 mph MAYBE on the top end.
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  #12  
Old October 14th, 2014, 12:14 PM
Gish
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David
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Quote:
Originally Posted by Red90 View Post
You should be able to maintain 100 comfortably if everything is fine. The 110s with the 1.667 transfer case are a bit limited by the gearing. 100 km/h is 3200 rpm. With my 90 and the 1.4, I could sit at 110 km/h as long as it was flat and there was no head wind.

I would look at the timing. If it is retarded a bit, then the engine won't want to rev up properly. If you want, we could get together and I could have a look.
Yeah that would be great, there's a few other question as well i'd have.

Thanks for the info folks glad to know i'm not just out to lunch
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  #13  
Old October 14th, 2014, 12:18 PM
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Richard Ordowich
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I was concerned with the speed of my truck but then insanity prevailed and I thought "where the heck do I need to get to in such a hurry in a bucket of bolts?"

I fly helicopters and reminds me of the joke "a helicopter is 10,000 moving parts trying to do you bodily harm" . A Land Rover is always trying to do you bodily and financial harm.

Drive slow and smell the diesel!
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  #14  
Old October 14th, 2014, 01:02 PM
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matthew m
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Drive slow and smell the diesel![/QUOTE]

Now that's quotable!
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  #15  
Old October 14th, 2014, 01:14 PM
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James Wallace
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The other option is to get an overdrive. It will not make it climb hills any faster but it will give you a higher top end on the flats without the engine screaming blue monkeys. Worked out just fine on mine and is not a difficult install. It does one other nice thing, gives a new ratio in Low Range that works really well on shitty, just shy of horrible dirt roads. Then you have a veritable forest of shifters. You can easily theft proof your car by leaving all the shifters in neutral.
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  #16  
Old October 14th, 2014, 01:15 PM
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thomas
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Originally Posted by Dogpilot View Post
The other option is to get an overdrive. It will not make it climb hills any faster but it will give you a higher top end on the flats without the engine screaming blue monkeys. Worked out just fine on mine and is not a difficult install. It does one other nice thing, gives a new ratio in Low Range that works really well on shitty, just shy of horrible dirt roads. Then you have a veritable forest of shifters. You can easily theft proof your car by leaving all the shifters in neutral.
As long as the thief is not using a flat bed.
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  #17  
Old October 14th, 2014, 02:28 PM
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Doug
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Drive slow and smell the diesel!
I suddenly have the urge to get this shirt. Someone needs to make it happen. Many will buy one, Newman will buy 7.
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