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M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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Turbo Blanket ? Who uses one?

 
Old 01-22-2018, 06:04 PM
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2011 E550 Coupe, 1992 Corvette ZR-1, 1991 368ci ZR-1, 1990 ZR-1, 1987 Callaway TT, 05 SL600, CLA45
Turbo Blanket ? Who uses one?

Wondering if anyone is running a turbo blanket(S) on their v12 TT?
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Old 01-23-2018, 07:50 AM
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Not me - I wouldn't want to risk cracking the turbos, but I am going to put a heat shield between the turbo and the charge air pipe from the compressor to the intercooler.

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Old 01-23-2018, 08:36 AM
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So is that a documented issue specific to M275s, I actually asked PTP about issues and they stated they have not had an issue since the inception of their business(Not specific to SL600).....
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Old 01-23-2018, 01:52 PM
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'06 SL65
I am not trying to persuade you in any way, simply providing my real world experience with blankets.

I have not had the chance to do the SL. However, I've always tried to add blankets to my turbocharged applications when I could. I have operated several different types of vehicles with blankets, some vehicles in excess of 10 years and 200,000 miles without any negative side effects.

In my experience, I have always gained better throttle response, lower under-hood temps, and in some cases, lower EGTs. IMO, the only drawback to blankets on a high-use vehicle is the blanket breaks down after about 60,000 miles. Recently, in search of a longer lasting blanket, I have switched to DEI's Titanium blankets on two vehicles. So far, they have 25k miles without any issues.

best of luck,

-PM
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Old 01-23-2018, 02:35 PM
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Sorry, forgot to attach this. Attached is a good engineering expriment performed by UT Austin. The results mimic my real-world experience. Most notably, the tip-in throttle response changes.

best of luck,

-PM
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Old 01-23-2018, 02:48 PM
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Yeah, I read that paper earlier today. Interesting (though the EGT was slightly increased). I'm not aware of anyone using them on the V12, nor of any problems, but when I investigated thermal blankets a few years ago (for various reasons, not just turbos) I came across some instances where people had cracked turbine castings through over-heating. The V12TT engine compartment is definitely too hot, but my inclination would have been to use metal shields instead of blankets.

More power and quicker response are always worth having, but I'd like to hear about more real-world experience. Do the serious tuners like Alpha use turbo blankets?

Do Borg Warner and the like recommend for or against using them? Any ideas?

Nick
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Old 01-23-2018, 03:06 PM
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Originally Posted by Welwynnick View Post
Yeah, I read that paper earlier today. Interesting (though the EGT was slightly increased). I'm not aware of anyone using them on the V12, nor of any problems, but when I investigated thermal blankets a few years ago (for various reasons, not just turbos) I came across some instances where people had cracked turbine castings through over-heating. The V12TT engine compartment is definitely too hot, but my inclination would have been to use metal shields instead of blankets.

More power and quicker response are always worth having, but I'd like to hear about more real-world experience. Do the serious tuners like Alpha use turbo blankets?

Do Borg Warner and the like recommend for or against using them? Any ideas?

Nick
The paper was good. Reminds me of my days as an undergrad snooping around the graduate lab trying to get help from the graduate students with heat transfer and fluids problems.

In regards to the paper:

On my diesel engines, I also notice a slight higher EGT upon tip-in. However, during a consistent pull up a grade for several miles, the EGTs are slightly lower overall with a turbo blanket. As mentioned before, the most significant gain is tip-in response.

your concerns on cracking I have never experienced. I have had seven vehicles over the years with blankets: 3 cars, 2 light duty diesel trucks, 2 heavy duty 15 liter semis; no problems ever. The semis just wear out the blankets from mileage every couple years.

Nor do I know if tuners use them. Using a blanket is a driveability improvement; not something that can be measured really on a chassis dyno. Short of an experiment, you really need to be in tune with your vehicle on many different driving scenarios to feel the difference of a turbo blanket. Further, when tuners are working on cars there's usually too many significant changes being made at one point in time to document a result from something, in comparison, so insignificant as a blanket. Last, my experience with most tuning shops is they want to get numbers on a piece of paper to sell more parts. None of them have really ever cared about drivablility. This is probably the main reason why I still toy with this stuff....

As far as borg warner and turbo manufactures concern on blankets, I believe it's a cost saving measure. you definitely see blankets being applied by F1...

I think the science is there. Why we don't see it, I believe is non-scientific reason.

Last edited by PrecisionEngine; 01-23-2018 at 03:24 PM.
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Old 01-23-2018, 06:12 PM
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I have 2 options, going to use either the Subaru or the T25/T28 blankets, they advised they had no direct fit for SL600 but these would work. Also getting one for my CLA45

I noticed you are in Chicago too....what burb?
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Old 01-23-2018, 06:28 PM
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I wrapped the downpipe of my CLA45 it runs 550-750 C and within 20 minutes you can touch the pipe wrap surface
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Old 01-23-2018, 06:29 PM
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Originally Posted by LGAFF View Post
I have 2 options, going to use either the Subaru or the T25/T28 blankets, they advised they had no direct fit for SL600 but these would work. Also getting one for my CLA45

I noticed you are in Chicago too....what burb?
non-specific blankets are a gamble. The blankets must fit snug, and cover as much of 360 deg of the hot side as possible. The more coverage of the hot side, the better. Non-specific covers usually fit loose, allowing air pockets and cold spots to occur. I have had some non-specific blankets fit well, and some I had to eat...

There are some companies out there that will make you a custom blanket (not sure what your budget is..). Custom blankets are usually double the price. However, I know this turbo is very similar to a version used by Porsche. Maybe you can do some digging and find out what those guys are using...

I live in the city for now...

Last edited by PrecisionEngine; 01-23-2018 at 06:32 PM.
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Old 01-23-2018, 06:35 PM
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These were the 2 options from PTP......they felt they would support them well
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Old 01-23-2018, 07:04 PM
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Originally Posted by LGAFF View Post
These were the 2 options from PTP......they felt they would support them well
I hear ya... they don't make a specific blanket for the m275. Thus, i figured that maybe they were not aware of the similarities between the M275's chargers and other platforms.

Take pics and let us know how they fit!
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Old 01-23-2018, 07:18 PM
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Guy from PTP went on ebay to look at ours vs 996 K24......sent the response below, they do custom but didn't seem interested in offering it

They are different than our 996 turbo blankets.If you want something as close as possible to work, you can go with either our T25/T28 Turbo Blanket or our flat-style Subaru Turbo Blanket that can also be used on smaller framed turbos with complex shapes.T25/T28 Turbo Blanket: https://www.ptpturboblankets.com/col...o-blanket-lavaSubaru Turbo Blanket: https://www.ptpturboblankets.com/col...turbo-blanketsThey will not fit perfect, but they will cover up the exhaust housing enough so that you can see the benefits from the turbo blanket.

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Old 01-23-2018, 10:10 PM
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Originally Posted by LGAFF View Post

Guy from PTP went on ebay to look at ours vs 996 K24......sent the response below, they do custom but didn't seem interested in offering it

They are different than our 996 turbo blankets.If you want something as close as possible to work, you can go with either our T25/T28 Turbo Blanket or our flat-style Subaru Turbo Blanket that can also be used on smaller framed turbos with complex shapes.T25/T28 Turbo Blanket: https://www.ptpturboblankets.com/col...o-blanket-lavaSubaru Turbo Blanket: https://www.ptpturboblankets.com/col...turbo-blanketsThey will not fit perfect, but they will cover up the exhaust housing enough so that you can see the benefits from the turbo blanket.

good deal. See if they'll let you return them if you don't like the way they fit. I personally wouldnt bother with the subaru style. Not enough coverage imo.

with the SL we mostly looking for heat reduction. You'd benefit more from a hat style blanket.

Last edited by PrecisionEngine; 01-23-2018 at 10:14 PM.
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Old 01-23-2018, 10:49 PM
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Found this photo cant read the product number
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Old 01-26-2018, 09:20 PM
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The blankets in the photos are K24 996 Turbo blankets......what to do....what to do
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Old 01-30-2018, 02:55 PM
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Ordered 2 blankets will test fit them and post up some notes
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Old 01-30-2018, 03:06 PM
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Originally Posted by LGAFF View Post
Ordered 2 blankets will test fit them and post up some notes
looking forward to it. Which ones did you end up going with?
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Old 01-30-2018, 10:56 PM
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I went with the Subaru, its flat but has more surface area...the T25-T28 don't cover all the way around and he didn't think the 996 would work......I think I can draw the sides down around the turbo. Picked one up for my CLA45 AMD also......just got done putting new hoses on my 90 ZR-1....so keeping busy, lol
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Old 02-03-2018, 08:24 PM
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Well pulled everything off....there is no way to wrap the turbo.....there is no clearance on the bottom or on the side...I could barely clear a piece of corrugated cardboard in the gaps
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Old 02-04-2018, 12:41 PM
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Originally Posted by LGAFF View Post
Well pulled everything off....there is no way to wrap the turbo.....there is no clearance on the bottom or on the side...I could barely clear a piece of corrugated cardboard in the gaps
That's a shame. I haven't looked down there since I hung my downpipes, I could've sworn there was more space.
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Old 02-04-2018, 11:40 PM
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Not giving up yet....might try another blanket.....the WRX had large pegs on the center which will not let it a coolant line
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