11 MPG???

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Oct 22, 2002 | 04:42 PM

#16

cseay1

Junior User

Joined: Mar 2002

Posts: 74

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From: Bealeton Virginia

11 MPG???

has anyone who has swapped to discs noticed an improvement in MPG? I would imagine that the discs which have less drag than [properly adjusted]drums may net a slight improvement. I am swapping motor and trans at the same time so my constants have gone out the window!

Chris Seay
Bealeton VA

Oct 22, 2002 | 08:57 PM

#17

Post Fiend

Joined: Feb 2000

Posts: 5,130

Likes: 8

From: Brea CA

11 MPG???

Actually the discs would have more drag.

Barry

Oct 24, 2002 | 10:09 AM

#18

Highboy70

Senior User

Joined: Jan 2002

Posts: 350

Likes: 0

From: Fairbanks USA

11 MPG???

1970 F250 4X4 390 cid , downhill with a tail wind I get 8mpg.

Nov 3, 2002 | 08:15 PM

#19

Sedric

Senior User

Joined: Nov 2001

Posts: 294

Likes: 0

From: Calgary Canada

11 MPG???

OK, I just got back from my first long trip with my '72 302, C4, 3.25 rear. I averaged 14.4 mpg for the trip. That's 500 miles on a straight, level road going 65 mph.

Nov 4, 2002 | 05:46 PM

#20

Joey1986Z

Thread Starter

New User

Joined: Mar 2002

Posts: 20

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From: Calhoun, Georgia USA

11 MPG???

What in the hell is a C4?

I have a C4 Corvette.

Nov 4, 2002 | 06:01 PM

#21

gtex

Lead Driver

Joined: Apr 2001

Posts: 6,175

Likes: 21

From: Texas

11 MPG???

[updated:LAST EDITED ON 04-Nov-02 AT 07:01 PM (EST)]C4 is a Ford 3 speed automatic transmission, little brother to the C6. It went behind smaller V8s and the 6 cylinder motors. It's much lighter than a C6.

With my 4.10 gears and an a pretty nasty cam, carb and intake combo I'm happy to be getting about 10 MPG.

Nov 4, 2002 | 06:40 PM

#22

Joey1986Z

Thread Starter

New User

Joined: Mar 2002

Posts: 20

Likes: 0

From: Calhoun, Georgia USA

11 MPG???

Soooo.....with the 302 I probably have a C4?

Nov 4, 2002 | 09:13 PM

#23

gtex

Lead Driver

Joined: Apr 2001

Posts: 6,175

Likes: 21

From: Texas

11 MPG???

Probably, but there are other auto trannys that Ford used. Some of the other guys here could help ID your tranny.

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Nov 6, 2002 | 07:25 PM

#24

rebocardo

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Joined: Jun 2002

Posts: 13,873

Likes: 3

From: Atlanta GA

11 MPG???

One thing that might effect highway mileage is the fan. On my truck it is a five blade, non-flex, no-thermal clutch fan. Just a big ole' blade.

Nov 6, 2002 | 09:22 PM

#25

mlf72f250

Elder User

Joined: May 2002

Posts: 799

Likes: 0

11 MPG???

[updated:LAST EDITED ON 06-Nov-02 AT 10:33 PM (EST)]I remember reading in an old SAE paper that at 5000rpm a fixed fan can take 15hp to turn. But using the "fan laws" power is proportional to the cube of speed, so at 3000rpm you'd have a 3.2hp loss. Significant, but not huge.

--Matt

1972 F250 Custom Sport Camper Special 4x2 360 2v C6 3.73
Some day hope to shorten to a 104" wheelbase as part of a Broncification project
My FTE Website -- http://www.clubfte.com/users/mlf72f250/index.html
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