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What's your fuel burn

 
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scottp



Joined: 17 Jun 2012
Posts: 110
Location: Fort mcmurray

PostPosted: Sat Jul 16, 2016 12:04 am    Post subject: What's your fuel burn Reply with quote

Just picked up a nahanni has a supercharged 383 in it and it loves the fuel took it out for a rip tonight with my Reader plugged in and this is what I Got
3200 28mph 40 liters hour
3400 30mph 50 liters hour
3600 34mph 54 liters hour Max rpm is 4200 309 pump I not sure of hp rating of engine but I am going to guess a a3 ? Will check on impeller tomorrow I figured it would burn more fuel but this is just a little
Less then my 240 sport jet was. If I go to a Aa I should be loading up engine less have a little higher max rpm and burn less
Too?
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dixopr



Joined: 23 Feb 2016
Posts: 16
Location: NWT

PostPosted: Sat Jul 16, 2016 9:28 am    Post subject: Reply with quote

Just did a test and I was loaded pretty decent. Ran 3200-3300 for an hour and 25 minutes on a 351 ford at 50 litres on the money.
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phatboy07



Joined: 14 Jan 2013
Posts: 19

PostPosted: Sat Jul 16, 2016 2:51 pm    Post subject: Reply with quote

I burned right around the same 45-50 litres an hour at 3400-3500 rpm in my sabre and LSA...A3 impeller.
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perpec



Joined: 18 Aug 2015
Posts: 12

PostPosted: Sat Jul 16, 2016 6:16 pm    Post subject: Reply with quote

With my 4.3L AT309 in a Explorer 166
I get 25L/Hr at 3100RPM doing 28MPH with the wife, 2 kids and fishing stuff
and 56L/Hr at WOT 4200RPM 45MPH same load
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Rapid Transit



Joined: 20 Jun 2005
Posts: 206

PostPosted: Sat Jul 16, 2016 11:24 pm    Post subject: Reply with quote

20 ft Clement, 351 stroked to 408, berkely / a2 ss ,

roughly 2000 lbs of gas, gear and people in the boat,

3400 rpm / 35 mph on gps upstream on the Kichika,

15 cdn gal, 1.5 hours or 45 liters per hour,or 10 gal per hour

a lot less coming back down, close to half, but lighter on fuel, food and liquer

worth every friggin penny !!!!!!
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scottp



Joined: 17 Jun 2012
Posts: 110
Location: Fort mcmurray

PostPosted: Sat Jul 16, 2016 11:54 pm    Post subject: Reply with quote

You ever try a a2 with the lsa? I have to phone Kem Monday and see roughly what this engine is rated for
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phatboy07



Joined: 14 Jan 2013
Posts: 19

PostPosted: Sun Jul 17, 2016 1:30 pm    Post subject: Reply with quote

No I never ran an A2 with the LSA. Would be to much rpm i think. I could spin the a3 to roughly 4900 rpm. Was actually going to try a 9.5 but have since sold the boat.
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Rapid Transit



Joined: 20 Jun 2005
Posts: 206

PostPosted: Sun Jul 17, 2016 10:05 pm    Post subject: Reply with quote

4900 rpm with an a3, what kind of hp in that engine ?
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phatboy07



Joined: 14 Jan 2013
Posts: 19

PostPosted: Sun Jul 17, 2016 11:09 pm    Post subject: Reply with quote

LSA from KEM I think is at about 530 hp. 9.25 impeller was roughly 4900 rpm in my boat
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scottp



Joined: 17 Jun 2012
Posts: 110
Location: Fort mcmurray

PostPosted: Mon Jul 18, 2016 10:01 pm    Post subject: Reply with quote

I was thinking that a a2 would have a higher speed at a lower rpm so lower fuel burn? I realize that a a3 impeller stops the pump from spinning out when starting off or hammering down and a a2 would spin higher so burn more fuel when hammer down ? Is this how I should look at it? Thank you
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