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 2016 4400HD vs 2017 HDR37EFI - Differences? 
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MMT Member

Joined: Wed Oct 12, 2016 1:21 pm
Posts: 21
Location: Kaw River
Post 2016 4400HD vs 2017 HDR37EFI - Differences?
Is there much difference in power between these two?


Fri Aug 21, 2020 3:02 pm
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Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: 2016 4400HD vs 2017 HDR37EFI - Differences?
It's noticeable.

#CFFITR
#mudmotor>physics


Fri Aug 21, 2020 3:54 pm
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MMT Member

Joined: Wed Oct 12, 2016 1:21 pm
Posts: 21
Location: Kaw River
Post Re: 2016 4400HD vs 2017 HDR37EFI - Differences?
in which direction?


Sat Aug 22, 2020 8:50 am
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MMT 1000 Club

Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: 2016 4400HD vs 2017 HDR37EFI - Differences?
The 37 is basically a 35 with better fueling (efi). The 4400 has more compression, better head flow (somewhat), and better fueling (carb), don't remember if it has an exhaust, but probably does. The 4400 is stronger.

#CFFITR
#mudmotor>physics


Sat Aug 22, 2020 9:53 am
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