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  #1 (permalink)  
Old 12-10-2008, 09:08 PM
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Cobra Make, Engine: BBF 545 Stroker Alloy Heads Roller Cam Aluminium Flywheel Twin plate Clutch TKO600 9inch Independent Rear 335x17 Rear 315x17 Front 1140kg
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Default What diff to use for Cobra

The Same Old Question Comes Up Again ! Im Runnig A 460 Stroked To 545 With A C6 And A 288 Jag Diff I Have Bought A Tko600 And A 9 Inch Irs Housing Going To Run 3.5 Gears Should I Run Open Centre Lsd Or Detroit Locker?
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  #2 (permalink)  
Old 12-10-2008, 09:15 PM
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Default No locker

Hi,
I would not run a locker on the street as it will push you off of any crowned road and when you let up off the gas as you go into a turn it will swing the rear around.
You could also install an air locker diff, that way you can lock the diff for drag racing and and unlock it for turns.
Good luck,
Perry.
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  #3 (permalink)  
Old 12-11-2008, 01:14 AM
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Just make it a strong one with that donk!!

How's the tremec going Mark?

The slow slow boat is still chugging for us as I believe I heard the words "they rolled the container" just before he said delivery early in the new year - sheez
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Last edited by stephen low; 12-11-2008 at 03:16 AM..
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Old 12-11-2008, 02:46 AM
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How'z it going steve did you finish up bringing a tko in! How is the cobra going I bought one in air freight Cheers Mark
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Old 12-11-2008, 03:18 AM
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Mark

My post above means I'm still waiting for mine to land here and then there still may be problems. Should have airfreighted like you. What did that end up costing you for the freight side of it?

How is the TKO to use?

And where did you have your shift point and how is it for location in the car?

Steve
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Old 12-11-2008, 03:49 AM
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Haven't put it in yet waiting to sort out the diff will do both at the same time
Freight was $600 plus $950 GST and other charges That was for $6300 dollars au worth of gear Its very important that the goods are marked made in USA otherwise you'll pay another %10 import duty
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  #7 (permalink)  
Old 12-11-2008, 03:50 AM
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Have a play with this ratio calculator.
Attached Files
File Type: zip Cobra R154 3.31 ratio speeds.zip (6.1 KB, 86 views)
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Old 12-11-2008, 03:51 AM
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Is there anyone out there that can help me with the diff situation
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Old 12-11-2008, 03:56 AM
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Thanks cobber I'm running .64 5th 3.25 will be to high Iam currently running lsd 2.88 i'll probably stick with LSD
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Old 12-11-2008, 03:43 PM
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Quote:
Originally Posted by HighPlainsDrifter View Post
Hi,
I would not run a locker on the street as it will push you off of any crowned road and when you let up off the gas as you go into a turn it will swing the rear around.
You could also install an air locker diff, that way you can lock the diff for drag racing and and unlock it for turns.
Good luck,
Perry.
thats not true , i run a locked diff on the street and have done so for years and have not experienced any of the those problems, the 71 xy gtho came from the factory fitted with detroit lockers and have never heard of any of them being turned around. tomcat
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Old 12-11-2008, 10:42 PM
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Default Gear Ratios

THANKS FOR THE GEAR RATIO CHART.
ITS THE BEST,EASIEST TO USE THAT I HAVE COME ACROSS.

REGARDS
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Old 12-11-2008, 11:34 PM
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This one is easier http://www.secondstrike.com/Technical/GearCalc.asp
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Old 12-11-2008, 11:39 PM
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Quote:
Originally Posted by tomcat racing View Post
thats not true , i run a locked diff on the street and have done so for years and have not experienced any of the those problems, the 71 xy gtho came from the factory fitted with detroit lockers and have never heard of any of them being turned around. tomcat
Are you running a detroit locker or a locked diff
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Old 12-12-2008, 01:01 AM
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Default Gear Ratios

Thanks Again.

I Still Like Your 1st One.the Graphs Help A Lot When Calculating Change Points For Different Internal Gear Ratios.

Have A Wonderful Cobra Day:d
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Old 12-12-2008, 01:41 AM
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locked diff
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  #16 (permalink)  
Old 12-12-2008, 08:45 AM
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Side note, but interesting, the challenge shelby cobras run solid spool,and have for some time .
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Old 12-12-2008, 02:52 PM
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When I picked the TKO 600 w/ 0.64 OD and a 3.77 rear end for my FIA most people on this site said 1st gear would be useless... I just finished the build the other weekend and for the first time I had it on the open roads today. I'm very happy with my tranny and rear end combo! It accelerates very well! I can't wait until it's broken in and I can spin the motor a little!
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Old 12-12-2008, 09:21 PM
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What diff are you running open centre LSD Or Detroit Locker?
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Old 12-12-2008, 10:01 PM
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I ordered the diff with LSD.
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Old 12-13-2008, 03:43 PM
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I am leaning toward the detroit locker is anyone going to talk me out of it
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