I've got a Big Turbo and its VF RSS

[nayfen]

Engine suction air flow rate measuring device.
It embodies an engine intake air flow meter measuring a mass flow rate based on measured pressures in an intake pipe, such as a pressure difference between two points and a pressure at a point. Calculations for integration and double integration of the pressure difference are performed, and both values of integration and double integration are corrected at a moment when an air flow rate is detected to be a zero based on a value of a time derivative of the pressure. Then a mass flow rate and an amount of air are calculated by the value of integration and the value of double integration respectively.

One of these sukers will let you know who's the boss

[GTILIN]

Its amazing you seem to know more about my own car than I do.

How does the air straighter thingy work, considering there is increased air causing possibly more tubulance?

Guy, as I said before this is the VF Engineerings' RSS kit, the same kit that out performed the Awesome GTI in 2 different locations. Maybe you misunderstood me but the custom tune is to suit my car, as every car is different to some small degree. Therefore to squeeze the most out of each car a custom tune is required. A little tweak here and there in coding does do wonders.

You know some of the most powerful cars in the world all have custom tunes to suit the mods and the way everything comes together.

Whats the point of having a 4inch intake for 500hp when you only use 330hp? Isn't it overkill for its current application? 3inch intake is big enough for an application of up to 500hp. The intake side of the GT2871 turbo is only about 3 inch wide. Doesn't a larger intake induce lag and delay, as the engine needs to suck harder to get all the air in especially from just crusing and flooring it suddenly or froma stand still?

I got rid of my APR exhaust because it was droning and leaking exhaust fumes in a number of places, which has subsequently been replaced by you for Nikola. I believe the RSC removes that drone.

I was having conversations with the instructor driving my car at Sandown when he was going WOT on the track too. So my AWE TBE meets all the ADR's plus allows me to have conversations at 230km. Come on Guy lets talk about the kits technical aspects instead of throwing a sales pitch.

I also found the APR TBE heavier than the AWE. The AWE does not have a rear muffler like the APR, the mid muffler is also smaller than the APR, but for some reason it doesn't drone, even with the VF RSS kit installed. The APR TBE is about 10 kg heavier, and when it comes to reducing weight, thats a lot of weight.

[Guy_H]

you should know who
he has 3" intake and yet makes 370 kw at all four wheels.
so you really don't need such a large intake.

yes i think Drmat has one of them new exhausts.

Who makes 370wkw out of a 2.0TFSI engine? thats got to be a record! All of that out of a stock ECU with a MAF? - please tell us!

[GTILIN]

Lucas at Eurospeed who is also my tuner has a B5 Audi A4 1.8T Quattro.

Last time at the dyno day in Sydney in May, he put down 389kw at all four wheel.

I believe thats a record for a 1.8T Quattro.

[Guy_H]

Andrew, I don't know anything about your car, have never seen a picture of it or the engine, nor a dyno plot, BUT I do know our product very well, and have been involved in it from inception into a production kit right from the start, Including working with the mechanical engineers who designed the kit (including the intake) and the Calibrators who programmed this from the start.

If you have a problem with the APR exhaust, it has a warranty, covered here in Australia. Any "leaks" would be checked by your local APR dealer.

Tell us the weights of your old & new exhausts? I have never seen an AWE one, let alone weighed one. 10kg saving would be good, but on a street GTI, it doesn't worry us - for a race car maybe but race cars don't have a noise problem either.

But saying that, if its lighter & you like it - go for it!, I'm sure its a quality product & I don't think anyone has said anything otherwise?

I have no idea about the VF kit vs Awesome GTI at all - what are the specs of the cars? When I worked on the Awesome car, it was a fast cruiser, for a start it was DSG, it had Lambo doors, stock internals, no LSD etc, so was it the same as the VF demo car?

As mentioned, the intake was made for the stage 3 - for 380 - 500+hp & works a treat on the APR system - not a problem for them (but seems to be a problem for you for some reason?) - I really don't care what size intake you run on your kit, we know ours & it works perfectly. No extra lag, no downsides at all.

I think you need to do some research on:

Whats the point of having a 4inch intake for 500hp when you only use 330hp? Isn't it overkill for its current application? 3inch intake is big enough for an application of up to 500hp. The intake side of the GT2871 turbo is only about 3 inch wide. Doesn't a larger intake induce lag and delay, as the engine needs to suck harder to get all the air in especially from just crusing and flooring it suddenly or froma stand still?

because you will find that cars making BIG horsepower have BIG intakes, and they way they restrict turbo cars for competition (the only way the FIA does it in the open classes) is to place a restrictor pre turbo, reducing engine output

[Guy_H]

Lucas at Eurospeed who is also my tuner has a B5 Audi A4 1.8T Quattro.

Last time at the dyno day in Sydney in May, he put down 389kw at all four wheel.

I believe thats a record for a 1.8T Quattro.

Congratulations, thats great numbers - especially for a 1.8! Its nice for a world record on a dyno to be held here in Australia. I have a friend who makes over a 1000hp out of his daily driven skyline, but thats no big deal - it has a stand alone ECU and two turbo's with 5" intakes, but it has little to do with a GTI with an off the shelf turbo kit on it!

[nayfen]

How does the air straighter thingy work, considering there is increased air causing possibly more tubulance?

it's a primary objective is to provide an engine intake air flow meter for measuring an amount of intake air without the increase of flow resistance and deterioration in measuring accuracy caused by stains on sensors, employing a means such as measuring a pressure difference between two points and a pressure at one point in an engine intake pipe, as calculating an mass flow rate of intake air based on the measured pressure.

deleted 2-3 pages of formulars didn't want to hijack thread

[No457 Snowy]

I've got a Big Turbo

I managed to hit 230km/h down the front straight.

I'm the first to have a big turbo kit installed on a DSG car in Australia

I've got GIAC doing a few custom tunes for me for track days.

I know someone else in melb has ordered the kit after driving my car for a few minutes.

[GTILIN]

Thanks DUDE! YOUR AWESOME!

See brotherly love between vdubs...now what can't tuners be the same.

When your in Melb lets go for a

[nayfen]

I have no issues with getting enough air, or any engine knocking occuring.

because your car has been custom tunned to suit the 3" intake.. you are making good power and sounds like a solid setup. but down the track when you replace internals and up the boost who knows.

[The_Hawk]

I have just spend not inconsiderable time editing this thread to keep it on topic.

As for GTILIN... you coming to DOVW? Interested in seeing this beast in person

[DUB 20V]

I have just spend not inconsiderable time editing this thread to keep it on topic.

As for GTILIN... you coming to DOVW? Interested in seeing this beast in person

man you must have some time on your hands,

[gtimk5]

Keep it civil and on topic please people,
GTILIN, post the fact sheets as you please,
Thanks, Andrew

[GTILIN]

Here's a dyno graph of the VF RSS kit done by VF in the States with 98 octane file.

It is the same setup as my car. The power is chosen at the wheels not crank. Also remember torque calculations in the USA are different from what is used in Australia.



The turbo used by VF for the RSS kit is not an oolder gen GT28 turbo as suggested, which struggles to hit 300hp. It is actually indeed the GT2871. From the data provided by Garrett (www.turbobygarrett.com) the GT2871 series of turbos have an max efficiency rating of 60% and is only rated to a max hp output of 475hp. There is a number of GT2871 turbos available from Garrett. VF Engineering use the GT2871 series of turbos for the 6 spd manual cars. I'm not clear on excately which one.

On DSG, I was recommended by VF to use the alternative they have which is a GT2860RS turbo. It is rated for power outputs of up to 360hp. However its max efficiency rate is higher at 72%.

So what does this mean? This means that by having my kit using a GT2860RS, it allows my turbo to spool faster, there is less lag since its operating efficiency through the rev ranges are higher. The reason of using the GT2860RS is because the DSG rev limiter is around 6800rpm whilst on the 6 spd manual it has been retuned by VF to be at 7200rpm. This theoritically means with the VF RSS kit, a 6 spd will always produce slightly more power than a DSG. The DSG makes up for this slight disadvantage, by:

- Spooling faster with the use of the GT2860RS
- The efficiency and speed of DSG shifting
- Efficiency of the GT2860RS over GT2871 also helps.

There is a lot more to making more power than he size of the turbo, other factors come in such as injectors, intake system, manifold design etc.

The intake design on my VF RSS kit is a 3inch design. It is a 2 piece design with 2 silicon hoses to connect the main sections. There is no changes in air intake tubing until after the MAF location. Which I believe helps with air flow control and reducing air turbulance. From what I know consistency in design provides a flow through effect on the kit.

I spoke with Sean at VF yesterday to provide more technical information on the kit than I can, to clarify and misconceptions out there.

More to follow... I'm hoping as much as the moderators and owners of GTI's, we can make this a very good technical discussion on Turbos and the fine art of tuning them.

In the meantime I'm going for a

Here's a good write up explaining the basics

http://forums.vwvortex.com/zerothread?id=3825236

[evorobin]

Where's the dyno sheet from your car?