pics from my dinan 3.62 diff install and initial impressions

Blake · 03-12-2009, 11:33 PM

Quote:

Originally Posted by doba_s

I don't think you should do that ... I mean how often are you planing on driving at your car's speed limit ? I think it should be more fun with 3.62 and S/C ...

i would probably get no traction whatsoever from a dig, but the rolling times would be amazing. i can only imagine the 60-130 time.

mixja · 03-12-2009, 11:58 PM

Maximum speed is lowered to just under 180mph @ 8300rpm in 7th...

artur777! · 03-13-2009, 01:55 PM

So lowered maximum speed?
with 3.62 FD the maximum speed is lower than 180 mph?

is it worth to change the maximum speed for better acceleration?

Sticky · 03-13-2009, 02:04 PM

Quote:

Originally Posted by artur777!

So lowered maximum speed?
with 3.62 FD the maximum speed is lower than 180 mph?

is it worth to change the maximum speed for better acceleration?

Is 179 mph not enough?

mixja · 03-13-2009, 04:47 PM

Quote:

Originally Posted by artur777!

So lowered maximum speed?
with 3.62 FD the maximum speed is lower than 180 mph?

is it worth to change the maximum speed for better acceleration?

In theory the stock DCT transmission will reach 205mph at 8300rpm in 7th gear - but the stock car won't be able to go faster than 185mph (even with speed limit delete).

The middle ground is to take the 3.45 diff which has a maximum speed of around 188mph...not worth it though IMO for an extra 9mph, I'd rather have the extra torque in gear of the 3.62...

Jaypod · 03-13-2009, 05:49 PM

Quote:

Originally Posted by artur777!

So lowered maximum speed?
with 3.62 FD the maximum speed is lower than 180 mph?

is it worth to change the maximum speed for better acceleration?

Funny eh? Most people spend money to make thier cars faster!

Seriously though - how much time do you spend at top speed? If a lot then I guess not worth it. The diff gives you the power where you will actually use it.

McLuVan · 03-13-2009, 07:44 PM

how bad was your mpg hit by this mod?

McLuVan · 03-13-2009, 07:47 PM

Quote:

Originally Posted by Sticky

Is 179 mph not enough?

+1 crap if that isn't enough for you
you must be fricking out of your mind!!!

Blake · 03-13-2009, 09:45 PM

Quote:

Originally Posted by McLuVan

how bad was your mpg hit by this mod?

i'm getting about 10mpg now...but i was only getting 12 before. my foot is heavy.

MrHarris · 03-14-2009, 05:16 AM

For DCT I think it's a must because of the lightning fast shifts. On a 6MT, the actual difference in speed may be hindered because you would have to shift more frequently.

Someone take this Diff, RPi Exhaust/scoops, filter, pulleys, software,some drag radials with a DCT and see what of numbers you can pull off at the strip!

Sticky · 03-14-2009, 05:29 AM

Quote:

Originally Posted by MrHarris

Someone take this Diff, RPi Exhaust/scoops, filter, pulleys, software,some drag radials with a DCT and see what of numbers you can pull off at the strip!

Umm, I did that, - full exhaust.

mikewads · 03-14-2009, 06:51 AM

Quote:

Originally Posted by Sticky

Umm, I did that, - full exhaust.

True you did do that and afterward you sold the 3.62. Like MR Harris above I thought for sure the 3.62 would really pickup your ET in the 1/4.

Why did you give up on the 3.62 so quickly? I remember you saying that you were going with a different combo in the future (I assume a supercharger).

Sticky · 03-14-2009, 02:45 PM

Quote:

Originally Posted by mikewads

True you did do that and afterward you sold the 3.62. Like MR Harris above I thought for sure the 3.62 would really pickup your ET in the 1/4.

Why did you give up on the 3.62 so quickly? I remember you saying that you were going with a different combo in the future (I assume a supercharger).

Yep, a supercharger ASAP, overkill with 3.62's. I intend to do a full writeup on the benefits of the diff and where they are after I go back out to the strip and have numbers to back up my conclusions.

artur777! · 03-14-2009, 02:53 PM

Quote:

Originally Posted by Sticky

Is 179 mph not enough?

enough of course, just I was suprprised.
M5 has a top speed of 325km/h

artur777! · 03-14-2009, 02:54 PM

Quote:

Originally Posted by mixja

In theory the stock DCT transmission will reach 205mph at 8300rpm in 7th gear - but the stock car won't be able to go faster than 185mph (even with speed limit delete).

The middle ground is to take the 3.45 diff which has a maximum speed of around 188mph...not worth it though IMO for an extra 9mph, I'd rather have the extra torque in gear of the 3.62...

I see the math.
You are right.
The question is: why are there only 3.45 and 3.62 FD? could I have 3.55 for example?

Sticky · 03-14-2009, 02:55 PM

Quote:

Originally Posted by artur777!

enough of course, just I was suprprised.
M5 has a top speed of 325km/h

On paper, and the DCT M3's is higher on paper.

artur777! · 03-14-2009, 02:55 PM

Quote:

Originally Posted by Sticky

Yep, a supercharger ASAP, overkill with 3.62's. I intend to do a full writeup on the benefits of the diff and where they are after I go back out to the strip and have numbers to back up my conclusions.

pls do it ASAP:-)

Sticky · 03-14-2009, 02:55 PM

Quote:

Originally Posted by artur777!

I see the math.
You are right.
The question is: why are there only 3.45 and 3.62 FD? could I have 3.55 for example?

There are many different ratios, you are just quoting the most popular.

artur777! · 03-14-2009, 02:55 PM

Quote:

Originally Posted by Jaypod

Funny eh? Most people spend money to make thier cars faster!

Seriously though - how much time do you spend at top speed? If a lot then I guess not worth it. The diff gives you the power where you will actually use it.

agreed

03-12-2009, 11:58 PM	#24
mixja Captain 50 Rep 783 Posts Drives: 2011 E90 DCT Silverstone Join Date: Jun 2008 Location: Beverly Hils, CA iTrader: (1)	Maximum speed is lowered to just under 180mph @ 8300rpm in 7th...
	Appreciate 0 Quote

03-13-2009, 01:55 PM	#25
artur777! Enlisted Member 0 Rep 37 Posts Drives: M3 e92 Join Date: Jan 2009 Location: Europe iTrader: (0)	So lowered maximum speed? with 3.62 FD the maximum speed is lower than 180 mph? is it worth to change the maximum speed for better acceleration?
	Appreciate 0 Quote

03-13-2009, 07:44 PM	#29
McLuVan Lieutenant General 304 Rep 13,114 Posts Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ iTrader: (1)	how bad was your mpg hit by this mod?
	Appreciate 1 bigjae19761569.50 Quote

03-14-2009, 05:16 AM	#32
MrHarris yodog 197 Rep 5,026 Posts Drives: '86 Corolla Join Date: Jun 2007 Location: Diamond Bar, Ca iTrader: (5) Garage List 2009 BMW [10.00]	For DCT I think it's a must because of the lightning fast shifts. On a 6MT, the actual difference in speed may be hindered because you would have to shift more frequently. Someone take this Diff, RPi Exhaust/scoops, filter, pulleys, software,some drag radials with a DCT and see what of numbers you can pull off at the strip! __________________ 2009 E92 M3 \| Alpine White \| Black Extended \| Advan RS \| Turner Test Pipes \| Dinan Axle-Back \| OETuning \| Eibach Springs \| UUC SSK \| VRS Front Lip \| VRS Type I Diffuser \| Matte Black \| RPi Scoops \| MS Filter \| Yokohama AD08 \| F1 Pinnacle Special Thanks: Gintani \| OETuning \| eAs
	Appreciate 0 Quote

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search