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10-07-2017, 07:06 PM | #1 |
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MFactory CF Drive Shaft
Thinking of picking one up for my DCT M3. Anyone have a long term review on this, in particular on NVH?
I have solid subframe bushings and stock diff bushings, car is daily driven with some trackdays. Thanks! |
10-07-2017, 07:10 PM | #2 |
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its great. there is no harshness or vibration, but your car will feel more clunky and direct and you'll be more in-tune with the differential. i have solid subframe and delin diff bushings. it transforms the car from a street car into an exotic. feels fantastic to me, but it is somewhat subjective.
remember what it felt like when you got your solid subframe bushings? its like another step to that.
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10-07-2017, 08:16 PM | #3 |
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Thanks roastbeef! What are the noticeable benefits?
Also did you notice any loss of torque in the lower rpms? Last edited by Redd; 10-08-2017 at 03:48 AM.. |
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10-08-2017, 06:14 AM | #4 |
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the most noticeable benefit is the car feeling more direct, and more connected to the road. it feels like throttle response is razor sharp.
i don't track gas mileage, but it seems to be slightly better, i'm not sure about that one though. the car definitely doesn't decelerate as fast as it used to when you let off the throttle. i know it didn't lose any torque. i can't tell you the car is faster- i don't equate my faster lap times to this one item. this is a good piece in a symphony of parts working together that enhance each other and improve the feel of the car. here is the real test- if i totaled my car and began to build another one, i would buy this driveshaft again. i enjoy it that much.
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10-08-2017, 08:49 AM | #5 |
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10-08-2017, 09:36 AM | #7 |
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10-09-2017, 01:54 AM | #10 |
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DCT.
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10-09-2017, 12:20 PM | #11 | |
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Also, what are your thoughts on running this CF shaft in an otherwise stock (DCT) car? TIA |
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10-09-2017, 02:07 PM | #12 |
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I looked on the website but it was not clear whether this reuses a stock guibo to avoid NVH
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10-09-2017, 02:17 PM | #13 |
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I have the same exact feelings for this product as roastbeef. The difference can be felt instantly after installation. I was a skeptic but was amazed on how instant and direct the power delivery felt compared to the stock driveshaft. Definitely one of my favorite mods!
It uses the stock guibo for sure...I personally felt no increase in NVH after installation.
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Last edited by dj_dub; 10-09-2017 at 02:26 PM.. |
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10-09-2017, 02:25 PM | #14 | |
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10-09-2017, 02:28 PM | #15 |
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10-09-2017, 02:55 PM | #16 | |
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I did use heat wrap on my x-pipe around where the shaft meets the flange to reduce the risk of separation due to high heat. This is recommended by the manufacturer...some people do it, some people don't. I'd recommend doing it as it is a cheap and easy way to protect your investment.
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10-09-2017, 05:54 PM | #17 | |
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10-09-2017, 06:24 PM | #18 | |
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http://www.m3post.com/forums/showpos...8&postcount=12 |
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10-09-2017, 08:04 PM | #19 | |
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10-09-2017, 09:04 PM | #20 | ||
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you'll see a benefit of running this shaft in a stock car, just know that the subframe and differential move around a lot... like about an inch during hard driving. i don't know if there is going to be any added effect, but you're going to be putting more direct power into the differential. you'll probably be fine. Quote:
as we know, the oem shaft is easy as it bends and makes up for the clearance issue. i think i shaved about 1mm of material off the carbon shaft while i was muscling it into the pinion flange. i was carefull to push on the metal end of the shaft because this didn't stress the carbon. its possible, it just sucks. took me about 10 hours underneath the car (including sitting in the garage cursing) from start to finish.
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10-09-2017, 09:09 PM | #21 | |
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10-09-2017, 09:43 PM | #22 | |
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Some more questions for ya: -Do you recommend solid rear subframe bushings as a logical addition to the CF propshaft? I am considering these as they add no NVH. I will likely stick to OE diff bushings. -Do you hear any sort of a "whine" especially as speed increases? Any other sounds or abnormalities as compared to the OE propshaft? -I found that the clunkiness from the DCT was largely removed with the GTS tune. Is this what you're referring to? TIA |
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