Carroll Shelby - Shelby 427 FE Engine Parts and Services
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Old 11-13-2011, 12:16 PM
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Exclamation Fuel use

With the rising fuel costs I guess consideration needs to be - what miles per gallon am I likely to get out of this beast.. the Shelby 427 aluminum engine crate motor.

The off the shelf crate motors using Shelby 427 aluminum blocks are certainly value for dollar item with dollar parity at the moment.

But the big question - without stating the obvious - is should I go a stroker for better fuel economy or just buy the 427 aluminum Shelby engine.

I currently run a 302 with 347 stroker in my GT40 and find with power to weight and average driving style at 100k (60mph) I can average a good 22mpg.

But after reading that the cast iron blocks are a 10mpg average unit, I was a little put off with stopping every hour for fuel/gas..

What experience have you guys had with the Shelby blocks - taking into account cams etc. What is a best scenario..

Would be keen to see some thoughts on MPG and overall economy if there is such a thing...

Thanks

Bernie
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Last edited by BMK; 11-13-2011 at 12:21 PM..
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Old 11-13-2011, 09:04 PM
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Now on all Cobra Talk with a Thread title of Left Field Question.
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Old 11-13-2011, 09:35 PM
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Cubes suck gas with status. I had to have a 427 engine in my Cobra. I only drive about 2,000 miles/year (boo-hoo!) and the $600 for gas at 13 mpg and $4/gal isn't going to break me. I would still pay $400 at 20 mpg. $320 @ 25 mpg. I suppose if I were to do it again I would consider the Coyote engine and get the extra mpg with plenty of power. It really depends on the miles you plan on putting on the Cobra.
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Old 11-19-2011, 01:40 PM
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WardL

Thanks for the reply.

I will be doing big miles. At the moment I am driving my GT40 quite a lot. So the Cobra will half that??

I have had some feedback about building the 427 for economy driving and will ask my engine builder to go down this path.

Whilst there will be a reduction in horsepower I feel 600HP starting horsepower can take a little bit of a reduction hit.

Like you I want the 427 in particular

There as been some good feedback on All Cobra Talk under my Thread - Left Field Question.

Ward again thanks for your feedback.

The next question I will post will be more specific now I now it is realistic and achievable to build for economy. Perhaps give me cam, tune specs. etc. will make up the basis of my next question. No doubt others have built big block economical motors.

Cheers

Bernie
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Last edited by BMK; 11-19-2011 at 01:43 PM..
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Welcome, from Carroll Shelby

Have you noticed that it's tough finding quality performance parts to build a reliable FE engine? I have and I decided to do something about it by introducing my own line of Shelby FE performance parts. I worked with my design staff to build the best, because my name is on them. My racing legacy with FE performance engines extends back to my race winning 427 Cobras and GT-40 Mk.IV racers that won LeMans. Three decades later, my newer Shelby FE parts utilize proven design refinement to create FE performance parts for the new millennium.

My catalog illustrates an overall selection of parts available, but we can supply complete engines or parts from oil pan to carburetor to build your own Shelby 427 FE aluminum or cast iron engine just the way you want it. Call and speak directly to our engine department with your tech questions and orders. You have my name on it.

~ Carroll Shelby   
   

 


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CARROLL SHELBY ENTERPRISES, INC.
19021 S. Figueroa St.
Gardena, CA 90248-4510
Tel : 310-538-2914
Fax : 310-538-1815


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