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      08-12-2017, 04:49 PM   #199
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Originally Posted by chadillac2000 View Post
Update:turbos have officially been purchased.
Which ones did you decide to go with!?!?
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      08-14-2017, 11:23 AM   #200
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Originally Posted by Ne1man35 View Post
Which ones did you decide to go with!?!?
But what's the fun in spilling the beans with no pictures? They're still about a month from shipping, but as soon as they arrive I'll give the new hardware a dedicated shoot.
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      08-14-2017, 09:42 PM   #201
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Originally Posted by chadillac2000 View Post
But what's the fun in spilling the beans with no pictures? They're still about a month from shipping, but as soon as they arrive I'll give the new hardware a dedicated shoot.
Fair point, I know I would want to hold on on the news until I could make a proper video!
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      08-29-2017, 05:22 PM   #202
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Originally Posted by chadillac2000 View Post
Update: window was repaired, car is still running great, turbos have officially been purchased.
Much excite about the new turbos and everything! Glad to see you continuing to upgrade your 1!

I've got the same brake light overlay waiting to go on and I recently did the valve cover gasket as well (video coming very soon). Good to see your original cover was still in good shape, mine looked to be as well after just under 160k.
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      09-10-2017, 08:05 PM   #203
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For most of 2017, I've been researching, ordering parts, and pinching pennies to put towards the inevitable turbo upgrade that many of us N54 owners embark upon. Some of us upgrade by choice, others are forced due to failure. I fall somewhere in between. While my turbo seals are more than likely shot and smoke when coming to a stop while still in gear, at 85,000 miles, they still spool quickly and pull hard on 20+ PSI off the shelf E40 maps with inlets.

When I first won the $1000 discount contest from Vargas Turbo Technologies back in March, I had loftier power goals--goals that could only be achieved with more fueling than my Fuel-IT! Stage 2 LPFP could provide. That's when I gathered the pieces to add a full JB4 incorporated port injection system. As I continued to read stories of trashed motors thanks to port injection related misfires, the more I began to second guess my build strategy. After all, keeping the daily drivability and reliability was of upmost importance considering how much attention I paid to maintenance. The thoughts of 650HP were nice to imagine, but dealing with tons of boost and timing, a less than desirable SMFW clutch setup (that will rattle unless idle is brought up to nearly 1000rpm), and the constant fear of misfires and consequently ruining a cylinder with port injection did not sound like something I wanted for my road warrior daily driver.

After carefully considering all possible options, I unloaded the port injection setup to a fellow forum member and let go of the idea of installing a Spec Stage 3+ clutch and SMFW flywheel. Instead I would keep my power goals modest, but employ larger than necessary hybrid turbochargers to keep stress on the system to a minimum. This is the final collection of parts that I've stockpiled, as well as an unboxing of all of the beautiful VTT components that showed up earlier this week.

The entire box was around 50 pounds and fairly large, but came well packaged with plenty of bubble wrap and packing peanuts.



Right on top were the VTT intake components of the kit which included: 2" silicone inlets, silicone hot side charge pipe (outlets), dual cone filters, the "C" FMIC modification so everything will mate with my 7" VRSF intercooler, and the appropriate connections/clamps.











And the snails I ultimately decided to pull the trigger on: GC Lites.



















Along with the turbos and associated silicone piping, I'll also be tackling a ton of other things while everything is torn down; mostly maintenance items that will be easy to access. Fresh oil, oil filter, NGK plugs, and new vacuum hoses all around are a given.



Heeding the advice of fellow forum members, I picked up this feeler style gauge to gap the plugs this time at .022 instead of the less-accurate coin style gauge I'd been using prior. I went ahead and gapped these so I wouldn't have to worry about it later. For what it's worth, I didn't had any misfires with the plugs that I gapped with the coin style gauge at the same .022 measurement.



In addition to the basics, I have a large pile of plastic wrapped replacement parts to install once the subframe is removed and everything is thoroughly cleaned. Included is a new turbocharger install kit from VTT, new v-band clamps, downpipe gaskets, oil pan gasket, all new oil pan hardware, oil level sensor o-ring, water pump and thermostat aluminum bolts, and a gallon of OEM coolant.



The last area to address would be the OEM N54 clutch/flywheel that I'm currently running. I do not launch the car and drive modestly for the most part aside from some rolling pulls through 3rd and 4th gear, so I haven't experienced any slipping or negative things to report at my current FBO levels, but with much more power I know I will--especially when surpassing the 500HP threshold. Since I am not willing to deal with the chatter and vibrations associated with the SMFW and on/off clutch feel in a car I deal with in traffic on hills every daily, I'm capping myself power output wise at the limitations of the OEM 335is/550i clutch; whether that be from DMFW related misfires or actual slippage.





While the transmission is out, I'll be replacing the existing setup with the 335is/550i clutch upgrade (with clutch disk, throwout bearing, clutch fork lever, pressure plate and pressure plate bolts), LUK DMFW, new flywheel bolts, transmission to engine bolts, pilot bearing, clutch alignment tool, manual transmission service kit with new drain/fill bolts, two quarts of Redline D4 ATF; a fluid that I've loved for the past 15,000 miles. I'm also hoping that the rear 2" VTT inlet will be somewhat easier to install with the transmission removed. Even the 1.75" MMP inlets I have installed now were nearly impossible with the transmission and turbos in place.





The sheer amount of parts to install is intimidating, but I'm also very excited for the experience. I have the engine support bar sitting in my basement that I'll need for the install, so at this point the only thing I have left is to decide when would be most convenient to tear the car down. With how well the car is currently running, this is a very involved tear down that I'm in no hurry to start. My 135i just turned 85,000 miles on the odometer, and I'll do my very best to make it to 100,000 miles before installing any of this unless I'm forced to do so because of clutch or turbocharger failure.



Plenty of breathing room by utilizing the GC Lites at lower boost levels, the stock-like feel of the 550i clutch and DMFW flywheel, taking care of A TON of hard-to-reach maintenance items, and being able to give the subframe and everything hiding underneath a bath sounds like something I'm going to enjoy very much! Most customers that upgrade to hybrids of this size are chasing horsepower numbers or do roll races for fun, but I'm a little different. I don't street race and don't go to organized racing events. I enjoy backroads, long sweepers on the Blue Ridge Parkway, and getting my blood pumping on certain on-ramps.

This will be more of a test of how long these puppies will last at moderate boost levels with proper fueling, larger free flowing pipes bringing air in and out, and all maintenance completely up to date.

Thanks to Vargas Turbo Technologies again for helping me save some coin!

-------------------------------------------------------------------------------

In other news, I installed a set of 21" OEM Porsche Sport Plus 2 wheels, 295 width Continental rubber, 15mm and 20mm ECS spacers and bolts, and painted the calipers red with new Porsche decals on my 958 Cayenne. Absolutely loving the look and drives even better than it did with the original 18 wheels.











Car life is good!
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      09-11-2017, 11:30 AM   #204
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Holy shiz man that looks great!

Unrelated - I'm not sure which one of your build threads to keep up with
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      09-12-2017, 07:34 PM   #205
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Those wheels look awesome on the Cayenne.
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      09-28-2017, 03:32 PM   #206
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do you know the power limits of the 335is/550i clutch? is it able to hold 450whp or does it start to slip closer to the 400 whp range?
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      09-29-2017, 10:38 AM   #207
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Quote:
Originally Posted by ShocknAwe View Post
Those wheels look awesome on the Cayenne.
Quote:
Originally Posted by Matticus91 View Post
Holy shiz man that looks great!

Unrelated - I'm not sure which one of your build threads to keep up with
Thanks fellas. Absolutely adore my current combo of vehicles at the moment. Daily driving the 1er and using the 958 to take on weekend adventures and dinner dates is working out perfectly thus far.

Quote:
Originally Posted by onedubdub View Post
do you know the power limits of the 335is/550i clutch? is it able to hold 450whp or does it start to slip closer to the 400 whp range?
According to a few people at VTT, they've ran the 335is/550i clutch for considerable periods of time just below the 600HP/TQ mark without any issues. Considering I am targeting lower numbers than that, only do highway pulls, and don't do hard launches, I think it will be work perfectly for what I'm going for.

If wanted anything more than a somewhat reliable 525-550HP, I'd probably be forced into the SMFW + a beefier clutch combo (and all that comes with it with noise and engagement). The more and more research I do on the Spec Stage 3+ option, the more it seems the quality is hit or miss, and the last thing I want to after installing all of this hardware is to have to go back in and repair something due to quality control issues from a manufacturer.
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      09-30-2017, 12:55 AM   #208
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After just registering as a member of this forum, I'm stoked to have found this build thread.

Hats off to you for an all around stellar job; both on the car and documenting it for the community.

I look forward to absorbing more knowledge and hope to see more pictures of Winston!

Last edited by Rundskop; 10-01-2017 at 03:31 PM.
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      10-12-2017, 04:20 PM   #209
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Keep the updates coming Chad. Such an awesome build and thread. This was my 3rd time going through it and I took a lot of notes
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