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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #26  
Old 08-22-2012, 07:37 AM
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Originally Posted by P_T View Post
The 3.46 will get you from 0 to what every faster than a 3.07 unless there is some internal problem in the differential, that is just simple physics. The 3.07 will give you fewer RPM at the same speed thus saving fuel. If the software limit was not modified, your top end will be the same, you will just be reving higher. If the speed limiter is no longer present, the top end will be higher with the 3.07.

BTW, it was a good visit in Bama, a pleasure to visit face to face. I checked the clutch tool...it's not for 6-speed.
Good points here and others made. I think my frustration stems from the DISA problem and lack of power. This morning in the crisp air it felt great. For now, I am keeping the 3.46. But who knows. Maybe I'll find the ever tough to find 3.23 I want.

And indeed, I thoroughly enjoyed our lunch together!
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now, go burn your Man Card, and buy yourself a Camry....
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  #27  
Old 10-03-2012, 12:58 AM
TerraPhantm TerraPhantm is offline
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Quote:
Originally Posted by P_T View Post
The 3.46 will get you from 0 to what every faster than a 3.07 unless there is some internal problem in the differential, that is just simple physics. The 3.07 will give you fewer RPM at the same speed thus saving fuel. If the software limit was not modified, your top end will be the same, you will just be reving higher. If the speed limiter is no longer present, the top end will be higher with the 3.07.

BTW, it was a good visit in Bama, a pleasure to visit face to face. I checked the clutch tool...it's not for 6-speed.
Not necessarily. 0-30 for example may be faster, since that'll still be within 1st gear. 0-60 may be slower because 60 requires an extra shift with a 3.46. 0-100 may also be a bit slower since the ZHP just barely gets to 100 in 3rd w/ a 3.07 iirc.

Averaged out, 0 - top speed should occur in roughly the same amount of time. With a 3.07, a ZHP could hit its top gear in 5th gear. A 3.46 will require you to shift to 6th to hit 155. So it'll likely end up being the same amount of time.
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  #28  
Old 10-03-2012, 05:49 AM
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Originally Posted by TerraPhantm View Post
Not necessarily. 0-30 for example may be faster, since that'll still be within 1st gear. 0-60 may be slower because 60 requires an extra shift with a 3.46. 0-100 may also be a bit slower since the ZHP just barely gets to 100 in 3rd w/ a 3.07 iirc.

Averaged out, 0 - top speed should occur in roughly the same amount of time. With a 3.07, a ZHP could hit its top gear in 5th gear. A 3.46 will require you to shift to 6th to hit 155. So it'll likely end up being the same amount of time.
IMHO, the main reason for switching to a 3.46 would be to expand the engine`s torque range in the middle of it`s band, making around-town driving and back-road corner scratching more enjoyable. The shorter diff *might* shave a tenth or two from the 1/4 mile time, but the difference would not be earth-shaking....
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  #29  
Old 10-03-2012, 06:02 AM
bimcwe bimcwe is offline
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Yes, but my posterior dyno

Might need to make an investment.
Also, you might find something helpful here.
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Last edited by bimcwe; 10-03-2012 at 06:04 AM.
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  #30  
Old 10-03-2012, 06:37 AM
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We'll know soon about performance. I am slated to go to the drag strip this Thursday night with my brother in law and do a "grudge match" 1/8 mile race against his Merc. I am hoping in an 1/8 mile my traction off the line will allow me to win the race. I will post timeslips (assuming I make it to the strip) and we shall see what good (if any) the 3.46 does.
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now, go burn your Man Card, and buy yourself a Camry....
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  #31  
Old 10-03-2012, 12:20 PM
skwidrific skwidrific is offline
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Good luck!

On another note:
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"Theoretically" is the operative term here....some cars (owned by the lucky few) are pure freaks of nature, outperforming 95% of their "identical" brethern....
Same phenomenon occurs in the sportbike world. We call them "Wednesday Bikes"...
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  #32  
Old 10-03-2012, 01:45 PM
SPDSKTR SPDSKTR is offline
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Originally Posted by smolck View Post
We'll know soon about performance. I am slated to go to the drag strip this Thursday night with my brother in law and do a "grudge match" 1/8 mile race against his Merc. I am hoping in an 1/8 mile my traction off the line will allow me to win the race. I will post timeslips (assuming I make it to the strip) and we shall see what good (if any) the 3.46 does.
Good luck, sir! See if you can get a video.

Sent from the Bamavarian Nexus.
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  #33  
Old 10-03-2012, 09:10 PM
TerraPhantm TerraPhantm is offline
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Originally Posted by Fast Bob View Post
IMHO, the main reason for switching to a 3.46 would be to expand the engine`s torque range in the middle of it`s band, making around-town driving and back-road corner scratching more enjoyable. The shorter diff *might* shave a tenth or two from the 1/4 mile time, but the difference would not be earth-shaking....
Agreed - though I do think a 3.23 would be the ideal balance between instantaneous acceleration and gear length. I figure there's a reason BMW stuck with that ratio on the E36 M3, which has a somewhat similar powerband.
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  #34  
Old 10-04-2012, 06:25 AM
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Agreed - though I do think a 3.23 would be the ideal balance between instantaneous acceleration and gear length. I figure there's a reason BMW stuck with that ratio on the E36 M3, which has a somewhat similar powerband.
Have been hounding my friend's salvage yard for some time now looking for one, of course, how many AWD wagons with manual transmissions do you ever see? Especially in Alabama. Alas, I must compromise. 3.46 which I have, or back to a 3.07?
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now, go burn your Man Card, and buy yourself a Camry....
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  #35  
Old 10-04-2012, 11:14 AM
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  #36  
Old 10-04-2012, 12:06 PM
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Looking forward to seeing the results.
+1 on this, I cannot wait to see the outcome!
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  #37  
Old 10-05-2012, 07:56 AM
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Didn't make the race track last night. But the 3.46 is feeling better with the cooler weather. I really think I have to bite the bullet and fix my DISA, I think the bell crank is rounded and the flap is only half working at times, other times not at all. And I blame this for the sluggish performance and not the diff.
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Originally Posted by Fast Bob View Post
now, go burn your Man Card, and buy yourself a Camry....
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  #38  
Old 10-05-2012, 11:21 AM
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Didn't make the race track last night. But the 3.46 is feeling better with the cooler weather. I really think I have to bite the bullet and fix my DISA, I think the bell crank is rounded and the flap is only half working at times, other times not at all. And I blame this for the sluggish performance and not the diff.
Don't let your disa suck little pieces into your manifold that wouldn't be good
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