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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Vargas Turbo Stage 2 / 3 update



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      01-04-2013, 02:04 PM   #155
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Originally Posted by jpsimon View Post
are people really arguing what is or is-not a "kit"?
Glad I am not the only who was thinking it. Wether it's a kit, not a kit, mountain of gold, or a pile of dog $hi7... let the man get back to work so we can see what these puppies can do!
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      01-04-2013, 02:53 PM   #156
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Quote:
Originally Posted by Vargasturbotech View Post
2 properly sized twins will easily flow well on the top end. It is back pressure that kills top end on the stockers and hybrids. That is why stage 3 will support much more HP, and breathe as well as a single. Stage 2 will have roughly the same HP limits as previous similar hybrids. 500-550 before it cannot overcome the bottle neck on the exhaust side, and you start to take out turbos. We have prototypes almost ready that fill this void between stage 2 and 3 that will be tested in the next 2 weeks. We will make an announcement if and when they perform as we hope.
Okay so basically, a hybrid designed with a stock sized flange is never going to produce the top end performance that a "properly" sized twin setup will. I assume that the "stage 2.5" setup you are working on will require new manifolds/downpipes?
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      01-04-2013, 02:57 PM   #157
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Quote:
Originally Posted by Jonjt View Post
Okay so basically, a hybrid designed with a stock sized flange is never going to produce the top end performance that a "properly" sized twin setup will. I assume that the "stage 2.5" setup you are working on will require new manifolds/downpipes?
I cannot provide details of the middle of the road hybrids but they address the exhaust bottle neck and other areas.
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      01-04-2013, 02:58 PM   #158
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Interesting development..
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      01-04-2013, 03:04 PM   #159
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Quote:
Originally Posted by Vargasturbotech View Post
I cannot provide details of the middle of the road hybrids but they address the exhaust bottle neck and other areas.
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      01-04-2013, 05:46 PM   #160
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      01-04-2013, 06:24 PM   #161
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Sorry if this was already asked, but what kind of numbers are you expecting from your stage 3?
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      01-05-2013, 12:42 PM   #162
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Quote:
Originally Posted by Rotary Rasp View Post
Sorry if this was already asked, but what kind of numbers are you expecting from your stage 3?
more than the tranny can handle lulz
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      01-05-2013, 04:44 PM   #163
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On one of the threads he posted the Stage 3 options and the biggest one looked like each turbo would be good for about 40lb/min. That would be enough to rock 3 liters pretty hard if you could fuel it and nothing broke. Almost double the capacity of the stock turbos.
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      01-06-2013, 02:23 AM   #164
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      01-06-2013, 01:22 PM   #165
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The stage 2's seem like such an amazing option! I cant wait! I would like to get the stage 3's but have a feeling they're going to be out of my price range.
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      01-06-2013, 08:21 PM   #166
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Stage 2

So is there anything else you have to or should by when replacing the turbos? Or do you R2 the turbos and thats it? I am specifically talking about stage 2.
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      01-06-2013, 11:41 PM   #167
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go to vargas website he might have a list of sugested parts to replace when installing new turbos
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      01-07-2013, 09:34 AM   #168
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Quote:
Originally Posted by Vargasturbotech View Post
I cannot provide details of the middle of the road hybrids but they address the exhaust bottle neck and other areas.
That's fine. This is pretty much all I wanted to know. The stage 2.5 setup is going to rock hard. I'd imagine a rather significant transition to high RPM output that we are not currently seeing.

I expect to see the N54 being stuffed into some rather capable chassis in the next few years. I really wish I had a 1m to tune, right now.
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      01-07-2013, 09:34 AM   #169
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Quote:
Originally Posted by smi1gj View Post
more than the tranny can handle lulz
Doesn't the 335i have the same manual transmission that the M3, M5 and M6 have?
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      01-07-2013, 09:35 AM   #170
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Quote:
Originally Posted by Carl Morris View Post
On one of the threads he posted the Stage 3 options and the biggest one looked like each turbo would be good for about 40lb/min. That would be enough to rock 3 liters pretty hard if you could fuel it and nothing broke. Almost double the capacity of the stock turbos.
Can the injectors fuel the engine fast enough to handle that much air?
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      01-07-2013, 10:21 AM   #171
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Quote:
Originally Posted by Jonjt View Post
Can the injectors fuel the engine fast enough to handle that much air?
I think it's more of a volume over time versus latency that actually matters.

And the answer is yes.
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      01-07-2013, 11:58 AM   #172
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Quote:
Originally Posted by Sered View Post
I think it's more of a volume over time versus latency that actually matters.

And the answer is yes.
The OEM injectors are rated to 2100cc IIRC
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      01-07-2013, 12:08 PM   #173
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Quote:
Originally Posted by Ænema View Post
The OEM injectors are rated to 2100cc IIRC
Hmmm, I'm not familiar with such ratings. I usually see injectors rated in pounds per unit time. I think this is what Sered was getting at (Is that correct Sered?).

And yeah, I wasn't referring to latency of the injector control system. It was the ability to flow.


Can the HPFP handle this?

God, I wish I had a 1m to put a stage 2.5 kit in.
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      01-07-2013, 12:25 PM   #174
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Quote:
Originally Posted by Jonjt View Post
Hmmm, I'm not familiar with such ratings. I usually see injectors rated in pounds per unit time. I think this is what Sered was getting at (Is that correct Sered?).

And yeah, I wasn't referring to latency of the injector control system. It was the ability to flow.


Can the HPFP handle this?

God, I wish I had a 1m to put a stage 2.5 kit in.
2100CCs is A LOT of fuel. Roughly equal to 200lbs/hour. I highly doubt the HPFP will be able to keep up.
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      01-07-2013, 01:18 PM   #175
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Quote:
Originally Posted by Ænema View Post
2100CCs is A LOT of fuel. Roughly equal to 200lbs/hour. I highly doubt the HPFP will be able to keep up.
Is there any such thing as an aftermarket HPFP that will flow more at the pressures we see?

If so, I'd bet people would swap to it just for reliability ...
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      01-07-2013, 01:28 PM   #176
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Quote:
Originally Posted by Ænema View Post
2100CCs is A LOT of fuel. Roughly equal to 200lbs/hour. I highly doubt the HPFP will be able to keep up.
Indeed. That is quite a lot. Wow.....
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