[OpenFlash]

Originally Posted by skinrock

Can you clarify why the DCI has to change?

Because the are plumbed to feed the stock turbos which are no longer there

[Robert@vishnu]

The DIFFERENCE is the SIZE of the turbo!! Our Single Turbo can flow alot more CFM of air than the factory two small ones combined! If you would like more info and details about this car feel free to email me at sales@vishnutuning.com and I will take care of you.

Robert@vishnu

Originally Posted by FirstBMWLA

Noob question.
What is it about single turbo that allows so much more boost/power
on 91oct without meth?

[forza1976]

Wow, those are some nice numbers and the graphs look great!

[OpenFlash]

Originally Posted by FirstBMWLA

Noob question.
What is it about single turbo that allows so much more boost/power
on 91oct without meth?

With a larger turbo, the engine is operating at a much lower exhaust back pressure level. Intake temperatures are also lower. Both of these combined means lower in-cylinder temperatures. Which in turn makes a car far less knock prone/octane sensitive. Basically, trying to supports 450 hp with the factory turbos is a whole lot more stressful on the engine and doing the same without bigger, more appropriately, sized turbo.

[OpenFlash]

Originally Posted by woodga16

Great numbers. Why is 20psi your cap for this turbo?

It's not. We are just keeping boost "low" until we get full Procede boost control. Running a manual boost controller right now and it's a bit flaky at higher boost levels.

[Sniz]

Originally Posted by shiv@vishnu

It's not. We are just keeping boost "low" until we get full Procede boost control. Running a manual boost controller right now and it's a bit flaky at higher boost levels.

and you also have NO way of running a failsafe for methanol without a lot of trickery.

anyway, just to give you guys perspective you cant run 20psi on this size turbo on a stock bottom end in almost any inline6 in the bmw catalog even after using a head spacer.

i'm impressed though granted PSI has nothing to do with power level or what the rods can handle.



shiv is driving a high 120's trap car on pump gas IMO

[dlbrooks18]

In for pricing on this kit? Thanks for the post and congrats!

[OpenFlash]

Originally Posted by rader1

SHIV, if i understand this all correctly this is a standard procede controlled DME and the only thing "special" is the manifold, turbo and associated piping.

So, why has every other single turbo build failed? I mean after seeing all the builds from reputable companies vanish without explanation i would think someone would've been here already if all it takes is the PROCEDE. I'm not trying to be sarcastic or an ass or anything like that, i am genuinely curious as to what the other guys missed. Any insights are appreciated greatly.

Ohhh, and congrats on pushing this platform to the next level

Yes, this is controlled by standard Procede rev3 on top of the stock DME. With a fully integrated PWM methanol system. No different than the same system run by hundreds of other users on this forum.

I believe there were some inherent turbo system design flaws associated with other single turbo systems. Flaws that went unnoticed by turbo system designers that weren't familiar with n54 tuning. I also think they may have tried using engine control systems that didn't offer the necessary flexibility. There is actually quite a bit of work required to customize a engine control system to properly and safely control single turbo. Even more so when approaching higher horsepower numbers. I think you be surprised by the number of failsafes we have implemented into the new Procede firmware. We have invested a lot of time into this project. So if this engine were to eventually fail, we want to fail due to power loads not unforeseen tuning faults.

[OpenFlash]

Originally Posted by dlbrooks18

In for pricing on this kit? Thanks for the post and congrats!

Thank you. We really want to finish the tuning side of things before we announce a finalized price. There are still a few questions that remain unanswered at the higher boost pressures that we plan to run. Running this turbo at just 19psi is criminal

[OpenFlash]

Originally Posted by Sniz

and you also have NO way of running a failsafe for methanol without a lot of trickery.

anyway, just to give you guys perspective you cant run 20psi on this size turbo on a stock bottom end in almost any inline6 in the bmw catalog even after using a head spacer.

i'm impressed though granted PSI has nothing to do with power level or what the rods can handle.



shiv is driving a high 120's trap car on pump gas IMO

That's true without full Procede boost control we have fewer failsafe options at this point. It should be implemented sometime next week and will be back on the dyno running more boost.

[CanadianTSi]

Shiv, is the Turbo a 626x or a 676x?

[dzenno]

Shiv, say you only raised boost on your meth pull and didn't raise timing as well, what do you predict power gained up top at say 6-7k rpm would look like?

By the looks of it from those logs boost was raised 1.5-2psi roughly and timing was raised 2.5-2.8deg at 6500rpm to gain 35whp over the pump gas run

[woodga16]

Ok I see now...just taking precaution, fully understand. For us automatic guys...I know with some big turbo apps. higher HP doesn't always mean huge Tq followed so we could in a perfect world run our stock AT(on borrowed time w/ very high HP) without problems, right? I know lag might be a problem, but that doesn't concern me. I prefer a easy daily driver and a screaming WOT run if that's an option. I know DI motors provide more Tq so maybe we can't have a high HP big turbo app. without the following high Tq to complitment?

I know you're one of the most knowing of our N54 motors and it's capabilites...just trying to get a handle on if it's possible to create a 600hp build with similar tq as a FBO car. Less tq=less stress on many mechanical parts. Too bad I love tq, just don't need gobs of it.

[OpenFlash]

Originally Posted by CanadianTSi

Shiv, is the Turbo a 626x or a 676x?

I'd like to keep turbo specs to ourselves for now. I hope u understand. But this will not be the last turbo we run on this car during this testing period.

[GQ335i]

Impressive!

[woodga16]

Forgot to mention, great work and R&D thus far!

[Jeff@TopGearSolutions]

Originally Posted by Sniz

excellent work shiv!!

I have no doubt there is more left in it. Keep it up.

oh, and that spool will increase but even if it doesnt anyone who drives one won't give a rats ass. it will help in certain situation.

I have full spool in my car by 3200-3500 w a GT35r and traction is non existant until I reach close to 80mph on a warm day. Its really not that awesome lol. Huge instant TQ isnt what you want IMO.

[zerep1]

Yeah the best torque is torque that rises all the way to redline makes the car feel like a sling shot

[135i]

I hope the price is right. I *could* be interested

[Mr_PharmD]

I actually thought having the hp/tq come at once was more stressful for motor compared to it coming at a linear pace?

[ajsalida]

Is it true this will not work for an xi? Is it a matter of clearance or what?

[OpenFlash]

Thanks again for all the kind words guys. Again, this was a joint effort with FFTEC. Without the hardware doing what it was supposed to do, I would not have been able to tune anything. I'm just happy we are off to a quick and painless start (besides that whole CAS/steering column lock fiasco).

To answer some questions:

We aren't quite sure how the 6AT will hold up to the extra high RPM torque. I have some ideas to reduce torque during the shift. We'll see how that pans out soon enough.

I don't see why we could adapt this kit to work in an XI. When we are ready to do installs in customer cars, it would be nice to work on an XI for this reason alone.

By then, we should be able to finalize pricing. But please realize that this isn't a bare bones turbo kit. It's a full system with a TON of R&D put into it. It will work beautifully and I don't think anyone will be disappointed. I think the worst thing we could do is to start penny pinching bits to make it easier to manufacturer. From what I've seen with upgraded twins, it doesn't matter how much the turbo kit is when just one unexpected re-work involves 10 hours of uninstall/install labor. Get it right the first time.

Shiv