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 13Likes
02-28-2020, 06:23 PM
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CC Member
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Join Date: Aug 2009
Location: Adelaide,
SA
Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,152
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Not Ranked
Quote:
Originally Posted by patrickt
The rubber on my tires are as old and hard as a fifty year old pencil eraser -- they are way overdue for a change. In lower gears, they break loose with about 30% throttle.
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I thought you were a lawyer, not an accountant....? 
So, back to post #12, at 30% throttle you should be getting good fuel consumption then?
Last edited by xb-60; 02-28-2020 at 06:27 PM..
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02-28-2020, 06:27 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,005
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Not Ranked
Quote:
Originally Posted by xb-60
I thought you were a lawyer, not an accountant....? |
Just goes to show that I don't have a lick of cents.... <pun>  |
02-29-2020, 05:53 AM
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CC Member
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Join Date: Feb 2009
Posts: 1,695
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Not Ranked
Quote:
Originally Posted by bwcobra15
I have 427W with quick fuel 780 carb, TKO600 w/.82 OD, 3.50:1 diff, 15" tires ... and I get 11 mpg AT BEST when cruising on the highway. I'm thinking i'm running about 2700 rpm at 75 mph.
I would have gone with the Tremec Magnum 6-speed with two ODs but the magnum is 3.5" inches longer and my driveshaft would be the size of a Dr Pepper can
I'm thinking of going to 3.27:1 differential .... I have 600+ ft lbs of torque that could pull it I think .
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Mine is about the length of a Dr. Pepper can with the T56. It is great though to be cruising down the highway in 6th gear at 70mph pulling just 1900 RPM with 3.70 rear gears and 800 horsepower. It gets about 21 mpg on the highway and about 5 in the city. |
03-01-2020, 05:35 PM
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CC Member
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Join Date: Oct 2000
Location: Midlothian,
TX
Cobra Make, Engine: Hurricane 427 Cobra #HM2008, Craft Performance 427w 600hp/600tq, TKO-600 close ratio, original Smiths gauges, lucas switches
Posts: 1,020
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Not Ranked
Quote:
Originally Posted by joyridin'
Mine is about the length of a Dr. Pepper can with the T56. It is great though to be cruising down the highway in 6th gear at 70mph pulling just 1900 RPM with 3.70 rear gears and 800 horsepower. It gets about 21 mpg on the highway and about 5 in the city.
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If i had the IRS from Hurricane i could do with the 6-speed but with a Ford 9" live axle i'm afraid the u-joints would bind or wear out fast.
I did about 200 miles this weekend and did observe i'm at 2800 rpm at 80 mph.
__________________
Bob Worley
Hurricane HM-2008 build is done!! (for now....)
Craft Perfomance 427W / 600hp / 600tq - TKO600
I love it and I need it I bleed it ~ Yeah it's a wild hurricane ~ Alright, hold tight, I'm a highway star!!
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03-02-2020, 08:26 AM
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CC Member
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Join Date: Feb 2009
Posts: 1,695
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Not Ranked
Quote:
Originally Posted by bwcobra15
If i had the IRS from Hurricane i could do with the 6-speed but with a Ford 9" live axle i'm afraid the u-joints would bind or wear out fast.
I did about 200 miles this weekend and did observe i'm at 2800 rpm at 80 mph.
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Agree. Definitely do not want to go that route with a 9". That isn't real bad, but with a 9", you can drop the 3rd member out of there pretty fast and throw in a lower gear ratio. |
03-02-2020, 08:33 AM
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CC Member
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Join Date: Oct 2000
Location: Midlothian,
TX
Cobra Make, Engine: Hurricane 427 Cobra #HM2008, Craft Performance 427w 600hp/600tq, TKO-600 close ratio, original Smiths gauges, lucas switches
Posts: 1,020
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Not Ranked
Quote:
Originally Posted by joyridin'
Agree. Definitely do not want to go that route with a 9". That isn't real bad, but with a 9", you can drop the 3rd member out of there pretty fast and throw in a lower gear ratio.
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Correct. I'm looking at going from 3.50:1 to something like 3.27:1 at some point in the future.
(Unless I hit a rich uncle inheritance, powerball, etc ... in which case i'll upgrade to Hurricane IRS and T56 Magnum 6speed!)
__________________
Bob Worley
Hurricane HM-2008 build is done!! (for now....)
Craft Perfomance 427W / 600hp / 600tq - TKO600
I love it and I need it I bleed it ~ Yeah it's a wild hurricane ~ Alright, hold tight, I'm a highway star!!
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03-02-2020, 09:07 AM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Quote:
Originally Posted by bwcobra15
Correct. I'm looking at going from 3.50:1 to something like 3.27:1 at some point in the future.
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With a 427 cid, and the TKO600 2.87 1st gear, you can run a 3.07/3.08 rear, or something like that. It would work fine, and then with the .82 5th, it would be great for cruisin. That's what I'd recommend. I wouldn't change to a 6 speed. Just change the rear.
I ran a wide ratio TL, 2.78 1st, with a 3.07 rear, and it was fine. And then crusin was pretty good for just a 4 speed.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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