Jump to content
SAU Community

Recommended Posts

  • 3 months later...

New results from a fellowzedder with gtx2863's. First graph was previous. 2nd graph are the new initial dyno results.

Snapped intake cam (twice now) so he changed out all 4 cams for stock exhaust cams (solid, no VTC anymore). New mufflers also and even bigger throttle bodies (58mm to 62mm).

 

[âIMG]

[âIMG]

  • 3 years later...

A bit of a zombie thread bump but I seen these turbos being shown by Spectrum Motorsports Solutions here in Canada and though they were interesting. How much of a difference will having anti surge housing make vs just standard housings

272951940_615829429525568_5950475535470813824_n.jpg

272726776_387444479851231_6234949020222769217_n.jpg

The surge slot is not there to improve performance. It is because GTX28 comp wheel will bend its shaft in solid housings, the surge slot is made preventing that problem. It looks like a T51R style sort of a insert, should make some induction noises.

Anyway, Result from an earlier highflow we did. Red line is with solid housing, and blue is with antisurge slot. From a S15, internally gated on E85 fuel

 

 

247125811_1899153450256247_7125461482544349490_n.jpg

269866300_626144128834156_7132807344569484046_n (1).jpg

Edited by hypergear
  • Like 2
On 2/24/2022 at 6:18 AM, hypergear said:

The surge slot is not there to improve performance. It is because GTX28 comp wheel will bend its shaft in solid housings, the surge slot is made preventing that problem. It looks like a T51R style sort of a insert, should make some induction noises.

Anyway, Result from an earlier highflow we did. Red line is with solid housing, and blue is with antisurge slot. From a S15, internally gated on E85 fuel

Any thoughts on the 42R compressor map they have? Seems pretty average to me but I haven't done a detailed comparison against others.

On 2/23/2022 at 3:47 AM, GTSBoy said:

Um....no? That's just twin scroll single turbo, isn't it?

BMW in classic fashion decided that TwinPower could either mean a single twin scroll turbo or two turbos. I still have yet to figure out why they bother with twin turbos on the M3 when it seems obvious to just slap a bigger single turbo on the B58 and call it an S58.

On 2/26/2022 at 7:55 AM, joshuaho96 said:

BMW in classic fashion decided that TwinPower could either mean a single twin scroll turbo or two turbos

Nah, they actually use both words, in both orders, to mean two different things. One order means twin turbo, the other means twin scroll single. They is classically f**ked over by marketeers. Engineers would tell them to go f**k themselves if they had the balls and the corporate power hadn't been usurped by the business school grads.

  • Like 1
On 2/25/2022 at 6:47 PM, GTSBoy said:

Nah, they actually use both words, in both orders, to mean two different things. One order means twin turbo, the other means twin scroll single. They is classically f**ked over by marketeers. Engineers would tell them to go f**k themselves if they had the balls and the corporate power hadn't been usurped by the business school grads.

718191700_ScreenShot2022-02-25at8_08_15PM.thumb.png.1824290f6935e938355eceb520fddc50.png

From: https://www.bmwusa.com/vehicles/m-models/m3-sedan/overview.html

On 26/02/2022 at 10:55 AM, joshuaho96 said:

twin turbos on the M3

Because it sounds cool on paper but in reality sounds aids (literally), a M3 with an exhaust sounds horrible. Kind of a reminds me of a stock turbo R32-34 with a loud exhaust, just sounds dreadful.

On 2/26/2022 at 12:51 PM, Dose Pipe Sutututu said:

Because it sounds cool on paper but in reality sounds aids (literally), a M3 with an exhaust sounds horrible. Kind of a reminds me of a stock turbo R32-34 with a loud exhaust, just sounds dreadful.

The F80 even stock sounds awful even compared to an RB26. I don’t know how but BMW figured out the ideal exhaust setup to make that engine sound as terrible as possible. 

  • Haha 2

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
    • I assume clearances were all a-okay?
    • Shock tower brace is in +5Kw....LOL  
×
×
  • Create New...