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6.5 vs 6.5td worth it?

vtach

Member
Steel Soldiers Supporter
323
5
18
Location
North Dallas, TX
Looking at getting another HMMWV. One has the 6.5, the other 6.5 turbo. Is there much to gained with the turbo vs all the extra parts/potential things that could
go wrong?

I’m looking for some thoughts from members here.
 

Coug

Well-known member
Steel Soldiers Supporter
2,967
4,347
113
Location
Olympia/WA
depends on which version of truck with the turbo. Post 300000 serial numbers have the sheppard steering box and geared fan drive that are difficult/expensive to repair. Before that I don't think there is a huge difference between most of the truck.

I've got a 6.5 non turbo, and it does good enough for most stuff, but if given the choice I'd probably have a turbo truck just for the extra power and driving at altitude has less power derating.
 

Gcelevator

Well-known member
Steel Soldiers Supporter
493
705
93
Location
Fort Lauderdale, Florida USA
I am running the turbo in the 1123 and it runs good. My friends with no turbo say it moves faster and better. Honestly i don't see much difference as they claim but they swear to it.
 

HoveringHMMWV

Well-known member
Steel Soldiers Supporter
476
1,095
93
Location
AL
In my opinion, the biggest advantage is in the factory air conditioning with a turbo truck.
If I had found an excellent condition older model truck with Red Dot a/c and 6.5L NA GEP, then I would’ve also been happy.
YMMV
 

HUMMER H1

Well-known member
225
820
93
Location
California
Here is my experience,

I have 1985 humvee with H1 turbo motor and 256 gears
I have M1123 without a turbo and 273 gears
I have ECV turbo with 308 gears

so far best all around performance is from non turbo M1123,

ECV is very fast up to 40 mph, then gears that give her that fast take off start to hurt her higher speed performance,

the 1985 humvee with h1 motor is slower than M1123 but on the highway it’s much easier, less RPM less noise,

M1123 is a sweet spot, it takes off fast and keeps RPM low enough to go over 60.
 
Last edited:

Hummer Guy

Well-known member
843
807
93
Location
United States Louisiana
Here is my experience,

I have 1985 humvee with H1 turbo motor and 256 gears
I have M1123 without a turbo and 273 gears
I have ECV turbo with 308 gears

so far best all around performance is from non turbo M1123,

ECV is very fast up to 40 mph, then gears that give her that fast take off start to hurt her higher speed performance,

the 1985 humvee with h1 motor is slower than M1123 but on the highway it’s much easier, less RPM less noise,

M1123 is a sweet spot, it takes off fast and keeps RPM low enough to go over 60.
This is pretty interesting, makes me wonder how much better it'll be with the BMI turbo
 
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