[Chris@VargasTurboTech]

Originally Posted by Brule

Tonys cars manual with pi yea.

Does he have backfire issues on gear changes from port injection not stopping quick enough on gear changes?

No sir. No issues.

Chris

[Brule]

What controller for port injection does he have.

[Chris@VargasTurboTech]

Originally Posted by Brule

What controller for port injection does he have.

Split Second.

[Chris@VargasTurboTech]

Quick Update:

Tony asked me to post some data on the new DOCRace intake manifold.

Short and sweet, this is basically no tune, so don't get fixated on the dyno numbers as much as the delta; the runs were 26-27 psi in general (and 8* of timing advance) but at the top end on this unfinished tune we'd get an overboost spike, from which you can glean some decent flow data:

Stock manifold: 28 psi at 6400 rpm with 75.6% wgdc

DR Manifold: 28.8 psi at 6400 rpm with 70% wgdc

[Fundguy1]

What's the best application for this to benefit?

[Chris@VargasTurboTech]

Originally Posted by Fundguy1

What's the best application for this to benefit?

Good question.

Seems like it helps flow up top at the (slight) expense of bottom end.

I'd imagine that the guys REALLY pushing the envelope -built motor, stage 3 or big single setup- could see a significant difference up top. It'd probably be very helpful on the way to 1000whp.

[Fundguy1]

Cool. Any help for a stage 2+ going for 700hp?

[Chris@VargasTurboTech]

Originally Posted by Fundguy1

Cool. Any help for a stage 2+ going for 700hp?

Pretty small gains there, most likely. If you're trying to max everything out, it appears it'll give you back a little wgdc, but I think what you're getting at is "when does this make sense to upgrade to?", which I honestly am not sure on.

Tony targeting 26-27 psi and spiking to 28 shows it makes a little more power at the same boost, and makes the same boost at a little lower wgdc. So it stands to reason that it helps out at the low 600 whp level -not a ton, but some none the less. The question is... is it worth it?

Keep in mind you'll need a different front turbo intake/inlet (normal VTT won't fit), and there is some pain associated with the install -custom charge pipe, relocating the throttle body, etc.

Chris

[Chris@VargasTurboTech]

It's a little after 9pm on a Friday evening, and we're just finishing up some next level type prototype work at VPG.

First, the disclaimers; don't ask me details because we aren't ready to share too much. Also, this is a ways out from production capability. There is a lot of work to be done. That said, we're still showing it because it gives you a glimpse of what we've got our dirty, dirty paws into... and it's awesome.

See below for DI only, no port injection, no methanol injection, no bandaids, no problem.

[hellokitty]

Originally Posted by Chris@VargasTurboTech

It's a little after 9pm on a Friday evening, and we're just finishing up some next level type prototype work at VPG.

First, the disclaimers; don't ask me details because we aren't ready to share too much. Also, this is a ways out from production capability. There is a lot of work to be done. That said, we're still showing it because it gives you a glimpse of what we've got our dirty, dirty paws into... and it's awesome.

See below for DI only, no port injection, no methanol injection, no bandaids, no problem.

Game changer!!

[nckwrnr]

By the 3500psi on the hpfp looks like you guys figured out an upgrade nice work! 25psi should be around 600whp impressive with no PI.

[Brule]

I was buying pi this week.

If he's figured something out I want to buy it.

[Fundguy1]

Idk what I'm looking at

[Chris@VargasTurboTech]

Originally Posted by Brule

I was buying pi this week.

If he's figured something out I want to buy it.

Originally Posted by Fundguy1

Idk what I'm looking at

You're looking at direct injection only capability the platform has never seen.

This is early in development -a LONG way away from production, if we ever even get there. It's on the race car for now as a test of the theory and also a testament to how hard we push.

If you're on the fence about buying a port injection kit, honestly, don't let this dissuade you. It's more a statement to what's going on in the lab.

Chris

[Chris@VargasTurboTech]

Hey everyone!

Extremely excited to post a little more data on what we're doing over at Vargas Performance Group.

We're testing a prototype hpfp system, and simultaneously testing control over it. Our testing started with normal E85, then Tony switched to E98 to really put the fueling system through its paces.

Disclaimers/Info:
-"proof of concept" prototype hpfp system
-prototype is called "the prototype" because it's not ready for production, meaning we have significant work to do in order to turn this into a product ready to sell, if ever
-indicates that DI only 600+ whp is possible on stock injectors
-stopped log at 6300 due to auto transmission (have other logs revving higher, fuel pressure & A/F is still good but those weren't the glorious dyno this is)
-Rail pressure was much smoother when we used higher targets, there is some control system learning that occurs -this dyno was done with no learning


Run Data:
Boost: ~28 psi
Timing: ~9*
Fuel: E98
Low Pressure Fuel Pump Assy: Fuel-it! Stg 3
High Pressure Fuel System: Prototype
Port Injection: None
Methanol Injection: None


Future Plans:
-More DI only testing and prototype development
-Examination of feasibility for production type configuration/implementation


Take Home:
-There is room to run over 600 whp direct injection only
-Injectors and injector window is not an issue yet
-Vargas continues to innovate and push hard

[Brule]

This is good, really good

[Tiago@VRSF]

Very interesting.

[Chris@VargasTurboTech]

Hey everyone, happy 4th of July!

We're finally doing the GC giveaway, so if you're an owner of GC's, have them on the way, or you buy them with our 4th of July sale (see marketplace thread: http://www.e90post.com/forums/showth...9#post20196119), don't forget to sign up for the GC giveaway. In short, we'll be doing a full purchase price refund to one GC owner.

Enjoy your 4th, be safe, and remember there is always lots of traffic, and lots of police officers, on the 4th of July weekend.

[Chris@VargasTurboTech]

7/24/16 update:

1: OEM's/Stage 1's lead time expected to be closer to 4 weeks
2: GC's in stock, ready to ship -also have a couple ceramic coated sets in stock and ready to ship
3: All silicone in stock, ready to ship

[Chris@VargasTurboTech]

Got a few questions from some guys about spool, boost, dyno versus street, diminishing returns, etc. Ok ok, I'll bite.

First, the standard accepted in our BMW world is the dynojet. As far as I know it's always been like that -likely because they're consistent. One issue, though, is that a dynojet will not put as much load as actually driving the car on the street will (same gear), which means typically spool is better on the street than will show on a dynojet.

I won't go into the tuning implications as it's beyond the scope of this post, but in short, if you see a dynojet that is in a reasonable gear, and the spool looks ok, it'll only get better on the street. So what about someone comparing spool on a street pull to spool of a different turbo on a dynojet? Not so useful.

It's easy to see when you just compare dyno to dyno. Excuses aside, here is the direct comparison -(remember "better spool")...Red is us, green is them (see attachment below).


That spool looks pretty good to us! As discussed above, it'll only get better on the street. Both will be better on the street, but unfortunately no turbo manufacturer owns the rights to street spool. If they have better spool on a dyno, they should post it! It's no fun getting beat on spool and horsepower in the same chart.

We do not have a street log to compare -too many variables and opportunities for questionable measuring practices to go on. All the same, compare dyno to dyno if you want some meaningful data. As more are sold, people will begin posting their logs/tunes/timeslips. It should help clear all this up.

Speaking of clearing things up, I heard a rumor from another competitor that the GC's, which are made by Zage to Tony's exact specifications (to be clear; not "zage cast turbos" but nice try lol) have "diminishing returns after 650 whp". I guess it depends on what you define as diminishing. If you mean that they have another 90+ whp in them, but you're heating things up because you're making 650 whp out of a 3 liter motor, then sure. We'll go with that. Otherwise it's just more talk from guys that need to focus on their own products.

Final thoughts; the awesome spool on the GC's won't be the best spool you see from a VTT cast turbo this year and the GC's awesome 738 whp dyno run won't be the highest cast turbo dyno you see from VTT either. With me taking over the majority of the online work, Tony has been left to his own devices for far too long, and has been cooking up some savage new ideas.

[dreyo27]

Nice DI development. Especially considering it e85. How long till it hits market? and price point going to be competitive or better the a PI kit?

[TrollToll]

Originally Posted by dreyo27

Nice DI development. Especially considering it e85. How long till it hits market? and price point going to be competitive or better the a PI kit?

At the moment it's all talk