[GeorgeSmooth]

I have them on eventually.
After fitting them I have driven the car for 200km at 17.5psi pump fuel no meth. The first thing I noticed is that the spool up of the turbos vs stock has not changed in the least. From the word go there is the same urge as the stock turbos that just gets harder and remains constant from 6000 till the redline. We where very conservative with the tuning and the car runs a bit too rich at that boost level and the timing is very conservative but rather be careful in the beginning as the first step is to tune as far as we can without meth or race and see what these turbos can do.
On a flat out pull I can say the car is equally strong to the stock turbos at 19psi with pump/meth. It simply pulls like a freight train.
At the moment everything is closed here so I will start seeing dyno numbers early in the new year.
If anyone is in the market for turbos these are the ones to get. They simply awesome and my mind is at rest that I will not get rattling as the waist gates are completely manufactured and re-engineered from scratch.
Keep in mind that I live at a 5500ft altitude and the stockers have to overcome the barometric pressure drop so the stock turbos up here at 17.5 are actually spinning at a coastal value of 20psi.
The flash tune will be pushed to the point that meth is needed for supplementing fueling or for knock prevention where after I might be going the Procede route.
At this stage I can say there are large amounts of airflow improvements up to the red line with no power drop off.
Let the testing begin.

[Trojan4evr]

Good to hear. I was wondering about the behavior of the engine and the Rob Beck turbos in stock form and what you have said and felt are what I was hoping for. Thanks for the update.

[cocoturkey]

Originally Posted by GeorgeSmooth

I have them on eventually.
After fitting them I have driven the car for 200km at 17.5psi pump fuel no meth. The first thing I noticed is that the spool up of the turbos vs stock has not changed in the least. From the word go there is the same urge as the stock turbos that just gets harder and remains constant from 6000 till the redline. We where very conservative with the tuning and the car runs a bit too rich at that boost level and the timing is very conservative but rather be careful in the beginning as the first step is to tune as far as we can without meth or race and see what these turbos can do.
On a flat out pull I can say the car is equally strong to the stock turbos at 19psi with pump/meth. It simply pulls like a freight train.
At the moment everything is closed here so I will start seeing dyno numbers early in the new year.
If anyone is in the market for turbos these are the ones to get. They simply awesome and my mind is at rest that I will not get rattling as the waist gates are completely manufactured and re-engineered from scratch.
Keep in mind that I live at a 5500ft altitude and the stockers have to overcome the barometric pressure drop so the stock turbos up here at 17.5 are actually spinning at a coastal value of 20psi.
The flash tune will be pushed to the point that meth is needed for supplementing fueling or for knock prevention where after I might be going the Procede route.
At this stage I can say there are large amounts of airflow improvements up to the red line with no power drop off.
Let the testing begin.

i'm looking forward to our dyno # with meth... thanks for sharing~

[TurboBimmer]

Good to hear these Turbos perform so well even on pump gas without meth! I don't want to run meth on my car, but these snails are definitely on my "want" list

Looking forward to your dynos.

[sleepergm]

Cool keep us updated ... how was the install?

[GeorgeSmooth]

Originally Posted by sleepergm

Cool keep us updated ... how was the install?

It was pretty straight forward with no modifications required. Had to remove the engine mounting being RHD to get to the rear turbo but it was what was expected.

[Penn999]

Originally Posted by GeorgeSmooth

It was pretty straight forward with no modifications required. Had to remove the engine mounting being RHD to get to the rear turbo but it was what was expected.

I debating on these or save up and wait for HPF...I guess you a dzenno's numbers are a big deciding factor. What tune are you running currently?

[GeorgeSmooth]

Originally Posted by Penn999

I debating on these or save up and wait for HPF...I guess you a dzenno's numbers are a big deciding factor. What tune are you running currently?

Currently running a flash tune. When meth becomes necessary or when the power is not enough I will go with Procede.

[Penn999]

Originally Posted by GeorgeSmooth

Currently running a flash tune. When meth becomes necessary or when the power is not enough I will go with Procede.

What flash makes 17.5psi?

EDIT: I see it in your sig. never heard of it, can you explain more

[Forcefed3]

I am jealous. Take it to the strip!

[dzenno]

George, given that RBs have larger compressor and turbine wheels and push more air mass the difference should be, "theoretically" less pronounced at sea level correct? How much more not sure, probably not MUCH less but at 5500ft vs sea level I would expect it to be not entirely negligible...what do you think/expect?

[jpsimon]

dzenno when are yours going in?

[dzenno]

Originally Posted by jpsimon

dzenno when are yours going in?

As soon as I get them...my postal code was messed up on my shipment so its taking forever to arrive now, most likely are on their way back to Rob and then need will need to be reshipped...if I got them today they'd be on the car tomorrow and dynoed with meth and race gas and vbox times by the weekend, all 9 yards...sucks, karma hates me

[Penn999]

Originally Posted by dzenno

As soon as I get them...my postal code was messed up on my shipment so its taking forever to arrive now, most likely are on their way back to Rob and then need will need to be reshipped...if I got them today they'd be on the car tomorrow and dynoed with meth and race gas and vbox times by the weekend, all 9 yards...sucks, karma hates me

sorry to hear that, I read about you misfortune on that other forum that im not allowed to say here. Good luck, I want some reviews as soon as you get um lol.

[enrita]

Originally Posted by Penn999

sorry to hear that, I read about you misfortune on that other forum that im not allowed to say here. Good luck, I want some reviews as soon as you get um lol.

if you are looking for upped biturbo these are the one to get man! with the right tune and timing control for safety plus 3 bar MAP sensor and meth you will be faster than a ESS VT625 M3

[Penn999]

Originally Posted by enrita

if you are looking for upped biturbo these are the one to get man! with the right tune and timing control for safety plus 3 bar MAP sensor and meth you will be faster than a ESS VT625 M3

I know, its just that I wanna see dynos before I drop 5k into my car. lost marine has the only numbers available to my knowledge. I want to see, vbox numbers as well. Im know im holding my breath with HPF but that what I wanna do later on..

[dzenno]

Originally Posted by enrita

if you are looking for upped biturbo these are the one to get man! with the right tune and timing control for safety plus 3 bar MAP sensor and meth you will be faster than a ESS VT625 M3

not safely without race gas though...you'd have to run race gas + meth + probably around 22psi minimum and then you "might" have a fighting chance..good thing is these RBs can be pushed to about 25-26psi and still be fairly efficient

[Penn999]

Originally Posted by dzenno

not safely without race gas though...you'd have to run race gas + meth + probably around 22psi minimum and then you "might" have a fighting chance..good thing is these RBs can be pushed to about 25-26psi and still be fairly efficient

You think the internals will withstand that kind of heat...I would put a probe in my exhaust and monitor egt's before getting up that high

[Rob@RBTurbo]

His findings of much more air mass traveling through the engine at a matched psi (as compared to stock turbines turbos) is a direct byproduct of the enlarged turbine wheel and housing bore. This type of modification increases the VE of the engine, or air pump, that we are dealing with here. As for the altitude have some affect on the mass airflow measurments I'd so they have little to no measureable affect. What the altitude is surely doing though is pushing these turbos further out of their efficiency range, thus making them work harder, to move the amount of air they are moving. Remember that turbos move air and the turbine is the resistance to the airflow that builds pressure. Thus with a free'er flowing turbine wheel and housing it takes even more compressor wheel airflow to build the same pressure as before. This is a great thing, it's exactly what you want (the most possible airflow at the least intake pressures). Unfortunately, it's all a balancing act because you also need the turbo to have good spool and streetability. To free flowing of a hotside will take wayyyy too much exhaust energy (RPMs) to propel the turbine shaft and compressor wheel to make any positive pressures; and that's no good either.

Originally Posted by dzenno

George, given that RBs have larger compressor and turbine wheels and push more air mass the difference should be, "theoretically" less pronounced at sea level correct? How much more not sure, probably not MUCH less but at 5500ft vs sea level I would expect it to be not entirely negligible...what do you think/expect?

[Penn999]

^ Good explanation. I believe that this is the best turbo setup available on the market. I look forward to seeing more numbers as I know dzenno will be pushing every little ounce out of these turbos.

[dzenno]

Just after I posted that I was still waiting on my shipment to arrive CanadaPost driver knocked on my door and delivered Them (yes with a capital T)

Pics to follow...they look absolutely SICK!

[Penn999]

Originally Posted by dzenno

Just after I posted that I was still waiting on my shipment to arrive CanadaPost driver knocked on my door and delivered Them (yes with a capital T)

Pics to follow...they look absolutely SICK!

Im jealous