RB Turbos Initial Impressions

George Smooth

///Member
I have them on eventually.
For the guys that do not know these are stock turbos with upgraded wheels and waist gate.
After fitting them I have driven the car for 200km at 1.2bar 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 1.3bar with pump/meth and a perfectly tuned file. 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 the reef and the stockers have to overcome the barometric pressure drop so the stock turbos up here at 1.2bar are actually spinning at a coastal value of 1.38bar.
At this stage I can say there are large amounts of airflow improvements up to the red line with no power drop off. On a few casual Vbox runs I managed to see exits on the quarter approaching 200 relatively easily.
Let the testing begin.
 

George Smooth

///Member
Quick update. Boost is up to 1.3bar now running methanol through the CM10 nozzle.
I fitted the AE exhaust pipe and my word did it make a difference. The aftermarket guys claim 12whp for a car on stock turbos but it seems with the added flow needs of the motor with the new turbos it unleashed more power than that.
The next step is going to be 1.35bar and see if the car can manage to pour enough fuel and the last step will be the race map with 1.40bar with race/meth. I am almosts certain that we will need to use the meth to supplement the fueling so I do not intend using this map on the street.
I have been thinking how much further I want to go with the car as I am reaching the point that the car will need a secondary row of injectors which will take a lot of the reliability and streetability out of the car. It will also require a supplemental ECU or piggy back to run the extra injectors with a new higher reading map sensor. For now I am going to see how well the car handles the power traction wise at the track until my times remain consistent and cross the bridge of more power then.
 

Twinz

Forum - Support
Staff member
George Smooth said:
Quick update. Boost is up to 1.3bar now running methanol through the CM10 nozzle.
The next step is going to be 1.35bar and see if the car can manage to pour enough fuel and the last step will be the race map with 1.40bar with race/meth.

This is exciting news!
1.4 bar...oh my goodness it is going to be a great 2011. :thumbsup:
Dont forget the pix when you have time.
 
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