DINAN 3.91 Limited Slip Differential initial impressions & review - Page 3 - BMW M5 Forum and M6 Forums
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post #21 of 99 Old 19th March 2012, 07:53 AM
randywei
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Quote:
Originally Posted by ACG View Post
PM me some details of cost as you have done some homework on this....if you don't mind sharing

My B'day is around the corner and I need to make this a good b'day present year for me
Done.

My birthday was just 2 weeks ago and my wheels were my bday gift to myself

2008 Space Gray M5
Check out my M5's SPEC profile

Performance: Dinan: Free Flow Sec. 3 Mufflers, Stage 1 Suspension, 13% Underdrive Pulley, CF F&R Strut Bars, Monoballs, FRC | Evolve: Long Tubular Headers (ceramic coated), Eventuri Intakes, Stage 3 Tune | Supersprint Sec. 2 X-Pipe (non-res) | RDSport RSB
Exterior: Vorsteiner: Molded 2-piece CF Splitters, CF Rear Diffuser, CF Trunk Spoiler | BMW Performance Kidney Grills | iND Painted Gloss Black Side Grills | Painted Bumper Reflectors
Interior: EuroBoutique Custom Steering Wheel | iND Alcantara E-Brake Boot | BMW Performance E-Brake Handle | Dinan Aluminum Pedals
Lighting: LUX H8 v3 Angel Eye LEDs | WeissLicht Smoked-out Sidemarker & License Plate LEDs | GP Thunder 45 LED Turn Signals | BMW OEM Interior LEDs
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Wheels (street): 20" HRE P43SC in Gloss Bronze 20x9"et+9, 20x10.5"et+28 w/ Michelin PSS 255/35/20 & 295/30/20
Wheels (track): 18" HRE R40 in Brushed Titanium 18x9"et+17 w/ TMS 12.5mm spacers, 18x10.5""et+28 (tires TBD)
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post #22 of 99 Old 19th March 2012, 08:02 AM
ACG
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Quote:
Originally Posted by randywei View Post
Done.

My birthday was just 2 weeks ago and my wheels were my bday gift to myself
Thanks got it.
Happy belated b'day

2006 Low Compression Supercharged VT2-650+ BMW M5

Performance: ESS Supercharged VT2-650 / Custom ESS Alpha N Tune / Sprint Booster V2 / RPI GTS Exhaust / RPI SV1 Oil Cooler / RPI Jet Hot Coated Headers/ Howerton Engineering - Aquamist HFS-3 Methanol Injection System.
Engine: 10.1:1 Low Compression Engine Build / Mahle Custom Pistons / Carrillo Rods / Custom Fuel System / Custom Rod Bearings.
Suspension: KW V3 Coilovers / Dinan Rear Sway Bar / Dinan Front Roll Control / Dinan Monoballs.
Handling: Daily Setup: 3 Pc ADV.1 05 wheels F 20x9 / 255/35/20 R 20x10.5 / 295/30/20 / Michelin PSS Tires / 12mm Rogue Engineering Spacers.
Track Setup: Apex Arc-8 wheels F 18x9 / Hoosier A6 P245/40ZR-18 R 18x10.5 / Hoosier A6 P315/30ZR-18.
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Interior: White LED Interior Lighting / Black/White CF Steering Wheel Roundel / Alcantara-CF Flat Bottom Steering Wheel / Handbrake Handle/Pedals / Hardwired Valentine 1 / P3Cars BMW E60 Vent Integrated Digital Interface / Custom SC Kit Color Scheme.
Programming: Mirror Fold-up / Window Roll-up / Sunroof Closure / Auto S5 at Start up / Euro Launch Control / iDrive Acceptance Delete / Rev Limiter 8600 / Top Speed Limiter Removed.
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The journey continues......

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Old 60-130mph 8.29secs....new time to come.

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2004 Infiniti G35 APS Twin Turbo with built motor and fully built transmission. 520rwhp and 550ft trq. SOLD but not forgotten
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post #23 of 99 Old 19th March 2012, 09:43 AM
John Morgan Evans
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Thanks for the review thus far..
This might be the last thing for me minus the JAWs single plenum. Trying to squeeze as much power/speed naturally aspirated as I can without stroking or boost haha

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post #24 of 99 Old 19th March 2012, 10:17 AM
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Quote:
Originally Posted by John Morgan Evans View Post
Thanks for the review thus far..
This might be the last thing for me minus the JAWs single plenum. Trying to squeeze as much power/speed naturally aspirated as I can without stroking or boost haha

The diff would help restore what is lost from those gorgeous huge wheels/tyres you are running BUT you can't gain the extra fuel used back

Jay
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post #25 of 99 Old 19th March 2012, 10:24 AM
John Morgan Evans
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exactly my thoughts. 70lbs per tire/wheel in the rear isn't bad for a 21x13 IMO, could be WAY worse. The diff would definitely help me down low again, doing the intake would improve the top (assuming when it comes out it makes more top end power) so it'll help Gunther be even more of a menace

Quote:
Originally Posted by ur20v View Post
The diff would help restore what is lost from those gorgeous huge wheels/tyres you are running BUT you can't gain the extra fuel used back

Jay

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post #26 of 99 Old 19th March 2012, 01:10 PM
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Do you have headers?


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post #27 of 99 Old 19th March 2012, 01:15 PM
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Ahmed, not sure if you're asking me.
Here is my current setup:
Radenergie Headers
Radenergie R-GT DTM Exhaust
RDsport pulleys
RPI scoops
Rpi block off plates
RPI oil cooler
BMC drop ins
ESS Tune.

Pretty much everything I can do as of now :\

Quote:
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Do you have headers?

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post #28 of 99 Old 19th March 2012, 01:48 PM
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I have the 3.91 on mine and I do love it, it does have some downsides though.
In automatic mode, the car wont shift gears by itself, you have to make it do so by easing on the gas pedal. The thing I really like is, if your at 40mph in 6th or 7th gear, just giving gas will return so much more torque, its like you dont have to downshift.

This is certianly a TRUE MOD with an absolute BANG for your buck completing the E60 M5 by providing better low end torque, a segment that was lacking the most.

Anyway,
I am about to top it off with a Pulley and headers later next month.


Also,
My Diff has the whinning noise, but its not too bad. I can hear it but it doesnt bother me that much since I play my music when in the car all the time.

Important Note to Everyone looking at Dinan Diff
One would think that Dinan is a big company who has product numbers on their parts but the answer is a straight NO.
So, please keep your invoice/proof of purchase with you, in case there is any warranty issue, because without it they dont warranty anything. Also, register your purchase on their website.

Last edited by TheRacerBoss; 19th March 2012 at 02:46 PM.
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post #29 of 99 Old 19th March 2012, 02:33 PM
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Quote:
Originally Posted by AngelSlayer View Post
Do you hear any whining from the diff? There were a lot of complaints about a whining noise which is the main reason I haven't done this.
Quote:
Originally Posted by ACG View Post
Do you have a pre dyno as I would like to know what kind of trq you gained from this mod. Like John said I have kept my distance due to the compliants of the whine but if you can let us know after the break in period has been complete that would be great.
It been little over 2 years since I got Dinan rear diff, mine experience with the rear diff was little different. First rear diff made whine noise through out the different speed and Dinan sent me a second one, and that was little better because it only made whine noise at one particular speed(70 mph). But if I think about, I didn't drive the Beast offen as I should during the break in period so my whine noise took longer to disappear. Pass this Saturday, I try to duplicate the whine at 70 mph, and it isn't there anymore.

So, my 2 cent is, break in period is very important!
Good luck on you next mod!

SOLD!!
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Last edited by SSS_M5; 19th March 2012 at 02:37 PM.
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post #30 of 99 Old 19th March 2012, 03:48 PM
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I have the 3.91 and I'm considering selling it, but have not desided yet so don't ask. With the stroker and the way the shifts fall I would like to get to 130mph in 4th and save a shift in the 1/4 mile run and 60-130mph. Also it does cruse at 2700-3000 on the hwy so what is the stock gearing rpm at 70-75mph?

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Best 1/4 E.T 11.74 Best MPH 123.86 - 60' 1.69 11/18/12
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