Technical Hydra Performance 135 Leichtbau State of the Art Thread

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ShocknAwe

Lieutenant
Jan 24, 2018
811
SC
Yeah when I totaled everything I became hugely disinterested in the S55 setup especially with all the leaks you were having. Nevermind adding weight above the cars COG.

I thought about teaming up with a fabricator and a local shop to make some kits for the S55 style system, but I honestly think it’s too much money for the platform at this point. A decent aftermarket charge cooler (CSF) and all of the accessories to make up a kit are going to run are going to cost at least $3k, And a ton of install effort or shop labor. I can’t imagine many people biting on that when it basically costs more than upgraded turbos. even if you wanted to buy a stock charge cooler to save money, I would actually advise purchasing a brand new one from FCP euro since I have had so may problems with leaking used ones.

Also I think that Hydra had mentioned that he wanted the larger core from the Mercedes. I can tell you that you aren’t going to get much more than the csf style to fit under the hood sitting on top of the engine. (on an e90)
 
Jan 31, 2017
295
Time for a much needed update.

So after long last, I'm putting the finishing touches on my //M suspension conversion which included a brand new, double-adjustable Intrax 1k2 coilover setup with optional ARC (Anti-roll control) and Black Titan (diamond-like) coating, E46 CSL rotors front and rear, and M4 (front) knuckles. Took me a LOT of time and effort to make everything fit together, especially in the rear. This is what happens when you combine an unholy mishmash of parts (E46 rotors, E92 M3 knuckle and hub, and E82 135i Brembos and e-brake assy) LOL.
The shocks are a work of art, and I can't wait to see what they can do on the road, and given what I paid for them, expectations are very high to say the least :)

Spring rates in case anyone's wondering are a relatively soft 5.6k F and 11.4k R, with a 128i F sway bar and a 1M R sway bar to trim things out.

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Jan 31, 2017
295
And here is something else that came in today that I'm especially proud of - a custom motorsports-spec 6.5" thick tube and fin core I had made that happens to weigh a whopping 24lbs LESS than a stepped 7.5" race core! The pics really don't do justice to the quality of the core, it really is a thing of beauty in person. I don't know of any other non-stepped N54 cores out there that come with 9 tubes, its usually either 7 or 8 which is a testament to the superiority of its construction. According to the datasheets I should still expect to see ~80% effectiveness at my power levels, which is good enough IMHO because at this point I have more use for less weight and better response than I do for additional power and torque, ESPECIALLY when that weight loss is at the very front of what is already a nose-heavy car. I wasn't planning on making more of these, as it wasn't cheap to produce, but I might consider producing a batch of 10 if the interest is there among the road-racing N54 peeps. Are there even 10 of those to begin with I wonder? :p

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alex_beridze

New Member
Nov 2, 2017
1
Hello to all
I plan to make n53 head setup on stock postons, what springs and camshaft I can use? stock? or high lifted? I need already testet setup ….
 
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Reactions: Rob09msport

ShocknAwe

Lieutenant
Jan 24, 2018
811
SC
Hello to all
I plan to make n53 head setup on stock postons, what springs and camshaft I can use? stock? or high lifted? I need already testet setup ….
Buy the drilled and ported head from Hydra, that way it'll fit. Use with any cam you want ... N53 cams are dirt cheap. Use stock N53 valvetrain unless picking the schrick high lift cams.
 
Jan 31, 2017
295
One more development before I finally put this thing back together. Turns out my Magnaflow exhaust (pictured below) weighs 18.6kg total, or 41lbs for the metrically-challenged :p , I've had it on the car for 3 years now, and while it looks great and sounds even better I couldn't help but think that I could cut its weight down to half, while hopefully freeing up a few more ponies along the way. Plan is to create my own oval section exhaust out of 20 or even 22-gauge stainless, with an equivalent OD of 3.5". Yes I know it'll be a massive pain to weld, and I run the risk of it sounding tinny/nasty, but this is the last bit of weight-reduction I'm willing to do to the car and the idea of shaving another 20lbs is irresistible to me, even if that weight is below the C of G.

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2.jpg


Our misadventure begins with an M4 midpipe I'm re-purposing for my needs. This is a full-flow dual 65mm design, with a 1.0mm wall thickness (~20-gauge) to keep weight down, and it just so happens to perfectly match the contours of the underbody. N54 downpipes outlets will need to be modified to get these to mate, as they use a different angle AND a different flange design. This will allow us to get rid of the 2.25" neck in the DP. Weight as pictured so far is 5.0kg with bracket/mount. Plan for the coming few days is to move the midpipe ~20mm vertically upwards, and fab the rest of the single oval-section pipe, have some absolutely batshit crazy ideas in mind - watch this space ;)






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ShocknAwe

Lieutenant
Jan 24, 2018
811
SC
Probably gonna sound awful, kinda like a Ti exhaust. But I like it.

Need to get a mid-axleback fabbed for 1M tip spacing and 135i fitment soon. Wish you guys weren't on another continent heh.
 

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