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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 > Helix turbo upgrade or RB turbo upgrade?



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      06-24-2012, 08:11 PM   #23
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That Helix torque-band looks identical to a car with stock turbos running meth. No thanks.

RB's turbos and Shiv/FFTEC's setup are the only ones that actually yield very tangible gains. The rest is a waste imo and most look to be done by someone who thinks turbocharging is as simple as strapping a 'bigger' compressor wheel on and expecting more power.
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      06-24-2012, 08:17 PM   #24
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If we're going to mention the Vishnu Single-Turbo upgrade (which is prob gonna be closer to $10k), then we might as well bring up the ASR Turbo Upgrade (RB performance in a more refined + expensive package) and that VAC is currently working on a TT upgrade that will also benefit from an competition spec cylinder head.
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      06-24-2012, 08:32 PM   #25
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Quote:
Originally Posted by benzy89 View Post
If we're going to mention the Vishnu Single-Turbo upgrade (which is prob gonna be closer to $10k), then we might as well bring up the ASR Turbo Upgrade (RB performance in a more refined + expensive package) and that VAC is currently working on a TT upgrade that will also benefit from an competition spec cylinder head.
VAC is working on some kind of turbo for our cars?
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      06-24-2012, 08:48 PM   #26
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Originally Posted by woptang22 View Post
VAC is working on some kind of turbo for our cars?
This is from the VAC thread when I asked about their aftermarket N54 Cylinder Heads
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Originally Posted by Mike@VAC View Post
No cyl head numbers yet. Looks like we are putting it on a 335i with COMP turbos....that will tell a good story.
And knowing VAC, they're not going to take something done already (RBs/ASRs) and market it as their own
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      06-24-2012, 08:54 PM   #27
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Quote:
Originally Posted by benzy89 View Post
If we're going to mention the Vishnu Single-Turbo upgrade (which is prob gonna be closer to $10k), then we might as well bring up the ASR Turbo Upgrade (RB performance in a more refined + expensive package) and that VAC is currently working on a TT upgrade that will also benefit from an competition spec cylinder head.
Add to that list the manifold being built by steed speed.
Steed speed twin scroll + EFR turbo+ ATR/ATP= win

Last edited by rader1; 06-24-2012 at 09:00 PM.
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      06-25-2012, 04:59 AM   #28
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Quote:
Originally Posted by benzy89 View Post
This is from the VAC thread when I asked about their aftermarket N54 Cylinder Heads


And knowing VAC, they're not going to take something done already (RBs/ASRs) and market it as their own
No VAC is the real deal and if they are going to use something, it will probably be special. As it always is. Im excited to see whats going on. If you hear anything let me know.
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      06-25-2012, 08:34 AM   #29
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Well right now we're looking at a new intake manifold (Morkinator & Steed Speed) + new cylinder heads + a new aftermarket TT upgrade (VAC) = a LOT more HP/TQ is about to get freed up
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      06-25-2012, 08:52 AM   #30
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This is from the VAC thread when I asked about their aftermarket N54 Cylinder Heads
Just FYI, I had a discussion yesterday with a friend of mine who has recently ported the heads on his 335i and achieved an additional flow of 19% compared to the stock heads. Developed on a flowbench, of course.

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      06-25-2012, 08:57 AM   #31
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Just FYI, I had a discussion yesterday with a friend of mine who has recently ported the heads on his 335i and achieved an additional flow of 19% compared to the stock heads. Developed on a flowbench, of course.

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Yea, when I went to VAC they showed me their flow bench they did all their testing on & had a shrink wrapped N54 cylinder head (think it was their Stage 1+ package) for a 1M. What kinda gains did he see w/ the 19% increase in flow?? Stock snails??
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      06-26-2012, 04:06 AM   #32
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Yea, when I went to VAC they showed me their flow bench they did all their testing on & had a shrink wrapped N54 cylinder head (think it was their Stage 1+ package) for a 1M. What kinda gains did he see w/ the 19% increase in flow?? Stock snails??
No, upgraded turbos. I don't think he's been on the dyno yet with all the modifications due to time constraints.

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