Fuel Burn

[Studman]

We are looking at maybe getting a 370DA

We have looked at 2 so far

1 is a 99 and has 7.4 MPI's and the second is a 97 and has 8.1 Horizons

Can you guys give me some rough estimates as to the fuel burn your getting or would expect to get
I know there are a number of determining factors but just some idea would be helpful

Thanks

 

[cjcray]

My 7.4 MPI engines on my 97 370 burn about 30 gals per hr. When I cruise at 3400 RPM.
right around 26 MPH. Which equates to .8 miles per gallon at cruising speed.

 

[northern]

25 gph per engine at 3800 rpm
3 gph per engine at 1300 rpm

 

[xravenx]

We are looking at maybe getting a 370DA

We have looked at 2 so far

1 is a 99 and has 7.4 MPI's and the second is a 97 and has 8.1 Horizons

Can you guys give me some rough estimates as to the fuel burn your getting or would expect to get
I know there are a number of determining factors but just some idea would be helpful

Thanks

Did the '97 with the 8.1s recently get repowered, someone correct me if I'm wrong but I don't think they ever offered the 8.1s for the 370DA.

I repowered my '95 370DA with 8.1s and I'm seeing 24-25 MPH, 30 GPH @ 3550 RPM. I'm getting .8 MPG.

John

 

[connie garcy]

Did the '97 with the 8.1s recently get repowered, someone correct me if I'm wrong but I don't think they ever offered the 8.1s for the 370DA.

I repowered my '95 370DA with 8.1s and I'm seeing 24-25 MPH, 30 GPH @ 3550 RPM. I'm getting .8 MPG.

John

Hi John,

I think you are correct on that. 8.1 was offered on the 380Da in 2000.

Connie

 

[Southpaw II]

I believe the 8.1 was first offered very late in the 2001 model year, and then was a fully available in 2002. The were many factory warranty claims on originally installed 7.4L engines, for water ingestion, and those were replaced with 8.1s.

Don

 

[Henry Boyd]

The 8.1/496 burns 15-16 gph at 3300-3400 RPM. Push it to 4000 RPM and it almost doubles to 29-30 gph. I've tracked my single 496 using Smartcraft and it has been pretty consistent.

Henry

 

[Searaybio270]

So If I read this correctly you are burning 50gals an hour? Seems very high.

25 gph per engine at 3800 rpm
3 gph per engine at 1300 rpm

 

[mawyatt]

We burn about 33~36GPH at 3400rpm with 8.1, which agrees with Henry.

 

[rcknecht]

To answer your question, the burn rates are about the same... What year are the 8.1s? They had problems with Aluminum exhaust risers failing. The 7.4s had water ingestion issues on the 340s, but not so much on the 370s...