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Shop Talk
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| bermblaster41 |
11-17-2006 06:51 AM |
Data plate # on 8.8 IRS diff
I have hurricane motorsports cobra with an 8.8 IRS diff. Trying to find out what gear ratio I have. The data plate reads S513B 3L08882L17. Any help would be great. Bermblaster!
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| mj_duell |
11-17-2006 07:28 AM |
If you are sure of the first 4 characters in this code (3L08882L17)
3L08
Then you have a
3.08 Ring Gear
"L" designates Limited Slip.
--Mike / Turn Ten Racing, Inc.
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| bermblaster41 |
11-17-2006 07:42 AM |
thanks Mike. What is the difference between limited slip and posi track? Thanks again. Bermblaster
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| bermblaster41 |
11-17-2006 07:46 AM |
I just checked it is 3L08. Is that to high of gears? I have a tremac 3550 with .68 5th gear Thank Bermblaster
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| mj_duell |
11-17-2006 07:51 AM |
The "Limited Slip" would be the Ford Traction-Loc diff. "Posi" is actually a GM designation that gets used by everyone else, but is essentially the same thing. 3.08 is high, but will give you great drivability and mileage. If you are looking for a good performance gearing, I would look between 3.55 and 4.10. This would depend on your needs.
:3DSMILE:
--Mike / Turn Ten Racing, Inc.
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| bermblaster41 |
11-17-2006 08:08 AM |
The cobra will never see a track. I am using a stroked 351 to 408. Just want good performance. Back tires 315/35 ZR17. Just want the soil factor :eek: [pasenger side] on the onramp accelleration. Not to concerned about off line performance. Thanks again Bermblaster
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| mj_duell |
11-17-2006 08:18 AM |
Quote:
Originally Posted by bermblaster41
The cobra will never see a track. I am using a stroked 351 to 408. Just want good performance. Back tires 315/35 ZR17. Just want the soil factor :eek: [pasenger side] on the onramp accelleration. Not to concerned about off line performance. Thanks again Bermblaster
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:D :D :D
Of course you do! I would look at a 3.55 or 3.73 and I think you will be happy. Keep in mind if you plan on really wailing this diff you should get things like a Ford Racing 8.8 Rear End Girdle or a hardened gear set.
--Mike / Turn Ten Racing, Inc. |
| bermblaster41 |
11-17-2006 08:29 AM |
Thanks Mike for your time. Had the car since June and things have finally slowed down to where I can dig in. Thanks again. Bermblaster
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Given the Tremec 3550's 3.28 first gear I'd consider your 3.08 diff ratio ideal. I had a Richmond 6 speed in a 69 Stingray. The 6 speed had a 3.28 first gear also and Richmond Gear tech said the 3.08 would be the prefered gear for street/strip duty. I went with the 3.08 as recommended and it was perfect. I've got 3.73s in my Cobra now and used to have a 3550 with my old engine combo. First gear was vitually worthless on the street. The TKO600 is better with it's taller first gear.
Dave
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| bermblaster41 |
11-17-2006 10:30 AM |
thanks Dave. That makes me feel better. Time to dig in. Bermblaster
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