IS F (2008-2014) Discussion topics related to the IS F model

ISF with IS350 Diff...

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Old 10-01-12, 01:39 PM
  #136  
rexio83
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Originally Posted by Compthis
So, my wife is complaining about how aggressive the car is so I have no choice but to change it out again. I'm sick of hearing her wine like a baby. I love the feel of it, but I dont like the way my head pounds after the wife is done complaining. I will be pulling it within the next few weeks, I live in the GTA, for sale for $350. I just picked up a stock 2010 Diff with LSD. if somone wants it I will be more inclined to swap it out faster. Let me know.
So did you end up going to the track on friday, if so what were your numbers.
Old 10-01-12, 02:12 PM
  #137  
Compthis
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Originally Posted by rexio83
So did you end up going to the track on friday, if so what were your numbers.
I didnt end up going on Friday, the guys I was to go with backed out. I'm hoping for a day soon before the season is over.
Old 10-01-12, 03:19 PM
  #138  
rexio83
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Originally Posted by Compthis
I didnt end up going on Friday, the guys I was to go with backed out. I'm hoping for a day soon before the season is over.
Too bad really want to see those #s before you swap the diff, I have to get a few more runs before the end of the season, thinking of going thanksgiving Monday track is open 11-4 I think. If weather permits.
Old 10-02-12, 10:27 AM
  #139  
Compthis
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Hey guys, I'm ready to swap out the diff and swap in the 2010 diff with LSD (full carrier)in my 2008. Is there any impact on anything I should be concerned with. For example electronic, ABS and what not? Please respond ASAP as I'm at the shop now lol
Old 10-02-12, 11:34 AM
  #140  
Compthis
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Well, the job will be done in 15min. Lets hope all is good. All is needed is oil
Old 10-02-12, 01:13 PM
  #141  
Compthis
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The new 2010 ISF diff is in and first impressions is that its stock. I feel the car has lost its wild kick *** side of it. No matter what the specs say I cant see how the only beneficial gear in the 350 diff is first gear. The car feels dead now. Anyways, it has LSD. Thanks Defcon racing again for a flawless install.
Old 10-03-12, 06:05 AM
  #142  
crazymikie
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Originally Posted by Compthis
The new 2010 ISF diff is in and first impressions is that its stock. I feel the car has lost its wild kick *** side of it. No matter what the specs say I cant see how the only beneficial gear in the 350 diff is first gear. The car feels dead now. Anyways, it has LSD. Thanks Defcon racing again for a flawless install.
I agree with you- the only thing I can think of is that the drivetrain is a torque multiplier, so when you look at those charts, you only see the drivetrain ratio, not what kind of torque the motor is making. You'd really need to look at engine torque X drivetrain ratio and see how that matches up.

My experience is the same as yours- the diff makes the car feel like it's in sport mode all the time. In manual mode, even at part throttle, the tires spin when changing gears.

I might be heading up to NED next weekend. I'll be sure to post results if I do.
Old 10-03-12, 06:08 AM
  #143  
MisterSkiz
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Where did you find your 2010 LSD used at? I have been looking all over and am unable to find a used one from a wrecked car...
Old 10-03-12, 08:58 AM
  #144  
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Originally Posted by MisterSkiz
Where did you find your 2010 LSD used at? I have been looking all over and am unable to find a used one from a wrecked car...
You're not going to believe it but there were two brand new wrecked 2010 ISF's. The cars fell off the delivery truck back when they were new and the insurance company wrote them off. The salvage yard I bought the diff from has two engines, two trannys, two diffs two everything. They parted the cars out then crushed them. When we drained the oil from the diff to replace it, it was crystal clear. Visually, the diff is in perfect condition and mechanically perfect. This yard still has the second diff........
Old 10-03-12, 09:49 AM
  #145  
MisterSkiz
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Compthis, You have a PM!

Last edited by MisterSkiz; 10-03-12 at 10:15 AM.
Old 02-11-15, 07:44 AM
  #146  
FrOHiKE
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well... we're waiting!
Old 02-11-15, 08:10 AM
  #147  
MK4Sup_isF
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2 1/2 years old thread!! Good luck lol ^^^
Old 02-11-15, 02:06 PM
  #148  
Compthis
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Originally Posted by MK4Sup_isF
2 1/2 years old thread!! Good luck lol ^^^
LMAO....Time sure goes....
Old 02-13-15, 10:08 AM
  #149  
Justind27
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I got a is350 4.10/ (whatever it is exactly) near complete diff if anyone needs/wants to experiment with one
Old 02-22-15, 02:18 PM
  #150  
sc3dreamin
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Interesting concept here, one would think that if you can get the car to hook up and go it *should* go faster at the track.

Of course, 2 more shifts at .1 each is gonna slow you down .2 right there.

Gear swaps is one of the first and most common things on mustangs and guys can drop .3-.5 tenths off their 1/4 mile ET but they are also set up pretty horribly.

For example, the 94-04 Auto cars were 3 speeds with overdrive. You would go through 3 gears in the 1/4 with stock gearing, and jumping from the stock 3.08 or 3.27 to 3.73 or 4.10 you would still go through 3 gears, just have a way better 60 foot and actually cross the line a lot closer to where you should be in 3rd gear.

I have a drag simulator that I use online sometimes, although it may not be 100%, it is interesting seeing what it says.

Stock: Summary
Seconds Seconds
0-60 mph: 4.34
0-100 mph: 10.70
60 ft: 2.06 @ 37.89
330 ft: 5.39 @ 70.28
1/8 mile: 8.20 @ 87.86 (89.46 actual)
1000 ft: 10.62 @ 100.79
1/4 mile: 12.70 @ 108.47 (109.29 actual)
Max Accel: 0.897 G
Air Density: 0.00245453 slug ft^3
Time Delta: 10.0 ms

with 4.09 gears

Summary
Seconds Seconds
0-60 mph: 3.92
0-100 mph: 9.93
60 ft: 1.81 @ 38.17
330 ft: 5.05 @ 71.43
1/8 mile: 7.81 @ 88.73 (89.81 actual)
1000 ft: 10.22 @ 102.37
1/4 mile: 12.28 @ 108.85 (109.61 actual)
Max Accel: 1.170 G
Air Density: 0.00245453 slug ft^3
Time Delta: 10.0 ms


I would think this would be fairly accurate, the car should get out of the hole and 60 foot a lot better.

As long as it worked the way it should down the track it should be quicker

Has anyone actually tested this yet?


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