[Brey335i]

I'm really curious to see the powerband from turbo option 1. My stock turbos are pretty bad at this point.

[ATP]

Originally Posted by GmoBmw

I still dont understand why people are hating? If you want a twin turbo set up go try building one no? The question started on how does the Single set up work, It really got sidetrack. Plus Shiv and his team did an awesome job with this car. Now he has the Highest hp and did it on stock internals. We need people like him to see what the N54 really can do. Just saying.

The OPs question was answered on the first page. After that the discussion has evolved. I don’t see anything wrong with that, it’s a forum where technical discussion is the reason for its sole existence.

If anyone thinks I am “hating” I am not, just expressing opinions and asking questions.

[rader1]

Yep, my question was answered and discussion since then has been very informative IMO. In no way does it help the community if no tough questions are asked and the only posts are 10 pages of "I <3 shiv"

[nailer335]

Originally Posted by Brey335i

I'm really curious to see the powerband from turbo option 1. My stock turbos are pretty bad at this point.

Me too on both accords. Been holding off for exactly this kind of thing to happen.

[nailer335]

Originally Posted by rader1

Yep, my question was answered and discussion since then has been very informative IMO. In no way does it help the community if no tough questions are asked and the only posts are 10 pages of "I <3 shiv"

Thatssss what you think

As much as we'd love to generalize that everyone's here to learn, e90post is a multifunctional board. People can

- learn about cars/turbos/tuning
- create the drama their "in person" life lacks
- show how cool/tough/smart they are or otherwise embrace the "my dad can beat up your dad" stage we all went through on the playgrounds of elementary school
- show off their mods
- tickle their favorite tuner's... You know
- I'm sure I missed a bunch of them... Because if I had it my way, feelings and egos would be left for "in person" life.

[Lulz_M3]

Originally Posted by nailer335

Me too on both accords. Been holding off for exactly this kind of thing to happen.

Lets be honest here, you can run any turbo you want that fits the manifold flange. I dont feel like digging but im sure its a an OTS T4 flange. Your turbo options are literally limitless. If you decide to change turbos down the road you just swap it out, modify the DP if needed (any speed shop can do) and go for a retune. Gotta love the simplicity of single turbo kits!

[Brey335i]

Yeah except Vishnu isn't selling the manifold by itself...

[amclint]

Originally Posted by Brey335i

Yeah except Vishnu isn't selling the manifold by itself...

Chinese knock-off prob be out in 6mo...

[Sigma 3]

Originally Posted by jlh335i

For the single verse twin arguement... I think it is interesting to compare the more developed aftermarket of e36's to the developing aftermarket of the e90's.

Several companies make kits to turbocharge those I6's, and with the exception of one guy in Europe, all of them are singles... Not to mention, the n54 makes more torque NA then the s52 in the e36 m3's...

This makes me question, is there really any feasability to bigger twins after factoring in the cost associated to produce them?

Other than being able to say 'my car has twins,' I dont see larger twin turbos being neccesary on this platform. This is just my personal observation and opinion

Not to mention, The turbos you would need to reach the power levels of the single kit (Gt28***, or there equivelanet from Tial) will not fit.
Even with major surgery and a miracle you would be looking at a smaller usuable torque curve and turbo lag equal to or worse than the single. Look at some of the graphs on audizine in the s4 section. You will see what I am talking about.
Lets put it into a cost perspective. A PT 6262 ( wich I have a brand new one on my shelf and hope shiv will let me use") will produce over 100 whp more that the current upgraded twins and only cost....$800!!! 1300 if you want all the bells abd whistles.

[jlh335i]

Sigma,
Ill have to check out audizine. In the past I have only made myself familiar with older bmw's, 4g63's, and 4b11t's. At any rate, I enjoy learning about different platforms - it provides me a broader sense of perspective, much like you mentioned. I think alot of members here would benefit from just that.

[Lulz_M3]

Originally Posted by Brey335i

Yeah except Vishnu isn't selling the manifold by itself...

I'm going to go out on a limb and say I really doubt he will honestly restrict turbo choice to only 3 options. $$ talks. I'm sure if you are willing to pay for his turbo kit, he will put whatever turbo you want on the manifold.. Within reason.

[vase330]

Originally Posted by shiv@vishnu

Copying technology/functionality is fine. What isn't fine is arguing against it when you don't have it and then arguing for it when you are able (sorta) to copy it. And then rewriting history so that few are the wiser.

Shiv that's called being a politician. Its a common theme and I guess the tuning field might have some politicians among you.

[jpsimon]

Originally Posted by Lulz_M3

I'm going to go out on a limb and say I really doubt he will honestly restrict turbo choice to only 3 options. $$ talks. I'm sure if you are willing to pay for his turbo kit, he will put whatever turbo you want on the manifold.. Within reason.

or you could just buy it, sell the turbo and put another one on

[Sniz]

Great discussion guys keep it up.

From my personal experience driving my 35r'd s52, its TOTALLY streetable even being lower compression. Seriously its insane fun.

Id vote for the exact setup Shiv is testing right now. 600whp t4 on pump and meth. Ultimate street setup.

[jlh335i]

Sniz, I was waiting for you to post haha. Your e36 is sweet.
I remember reading your build thread awhile back... do you have any more videos to show off an inline with a big turbo ?

[MrBlonde]

Originally Posted by Sniz

Great discussion guys keep it up.

From my personal experience driving my 35r'd s52, its TOTALLY streetable even being lower compression. Seriously its insane fun.

Id vote for the exact setup Shiv is testing right now. 600whp t4 on pump and meth. Ultimate street setup.

I'd actually go the size down BW turbo than the prototype for an awesome street car.

[Sniz]

Originally Posted by MrBlonde

I'd actually go the size down BW turbo than the prototype for an awesome street car.

I can't argue w that, as a smaller size would spool earlier, but the itch for more power is always there. If he can really get full boost by 3,000 and still hit 600whp then that's fantastic!

[Lulz_M3]

I like my powerband above 3k, its called TRACTION CONTROL lol. Massive low end torque = massive wheel spin. Atleast it gives the tires a chance to play catch up before the torque comes in like a sledge hammer.

[secretsquirrel]

^^^ Yep. And if you are doing anything besides racing from a dig, you'll be in the power band if your in the right gear anyway.

[hotrod182]

Originally Posted by Lulz_M3

I like my powerband above 3k, its called TRACTION CONTROL lol. Massive low end torque = massive wheel spin. Atleast it gives the tires a chance to play catch up before the torque comes in like a sledge hammer.

Massive low end torque is great for driveability if it is easy to modulate with the throttle. Hence a similiarly powered E55 will usually kill a V10 M5 at the dragstrip. My 335d with 500+ Tq is effortless in launching and cut and thrust traffic.

A big question I have is besides the huge power/Tq differences in the normal driving range below 4000rpm. The dynos show what the turbos are doing under a load. How does this correspond to transient response? If you are driving around town, and let off the thottle in 1500-4000 rpm range, to slow down, and then speed up again. What is the difference in reaction time before you get boost again? Is the single not only weaker in output, but also taking much longer to hit that weaker output? This would represent non-dyno situation, or where we don't have an opportunity to power brake the car in a planned encounter.

[pits200]

Man, if the awd can hold this kind of power, I can see a low 10 second car with the smaller single turbo since it can handle the earlier rpm power.

Besides the transfer case, I see no reason why it wouldn't be as apt as the rwd model to handle the power. If anything it should do a slightly better job splitting the power to two differentials vs one.

[Lulz_M3]

Originally Posted by hotrod182

Massive low end torque is great for driveability if it is easy to modulate with the throttle. Hence a similiarly powered E55 will usually kill a V10 M5 at the dragstrip. My 335d with 500+ Tq is effortless in launching and cut and thrust traffic.

Im suprised to hear that, typically turbo engines are terrible to modulate throttle, which is why people choose NA motors for track cars.