First and foremost, stay away from the 2 stage boost controller systems...get the simple boostvalve and set it up yourself for what you are running. you dont need to waste your money on 2 setups...if you want to control your boost levels, just use your right foot on the pedal and your eye on the boost gauge. just ask yourself 1 thing. is the car a race car or a daily driver? mine is a daily driver and want it to be as reliable as possible...im running a hybrid vnt20 with 25psi. egts are low, and everything runs great...i have the power to blow away a BMW M3 with the reliability and fuel economy of a stock tdi motor. When my car was stock, I was getting about 850kms a tank. Now that i have added all these mods (see sig for mods), i have yet to see any loss, if not better, fuel economy...i actually have hit 955kms in 1 tank...i never hit 900km when i was stock. it really is about tuning so make sure you find the right tuner. there are many good ones out there. I say start with a chip, boostvalve and boost gauge and get ready to have a smile on your face. then move from there.I posted this on another TDI specific site, but I figured I would post it over here too so I could catch some other TDIers opinions
I have been thinking about modifying my newly acquired TDI. Diesel is a new thing to me, but I am very capable with conventional gasoline engines. I got rid of my "street" jeep to get this TDI for the sake of fuel economy but the hot-rodder inside of me has a hard time not modifying anything.
So in an attempt to heighten the performance of my Jetta while retaining the economy of it I want to ask if anyone has any experience with a dual stage set up on their car.
I am thinking the use of a dual-stage boost controller with one setting at the factory level and the other setting at a higher lever (dependent upon supporting modifications).
Accompanying the dual-stage boost controller would be a system for supplying the correct amounts of fuel for both boost setting. i.e. a factory fuel map for the factory boost and a tailored fuel map for the higher boost.
I have been doing a bit or reading but so far I have not seen anything specifically for the VW Jetta TDI that would support that? Or is there something and have I missed it? For the sake of my project I would not be against running two ECUs (one with the factory settings, or tailored to run as close to factory as possible with larger injectors, and one ECU with the custom settings) with the supporting wiring to be able to switch back and forth.
Supporting modifications would be ones that I hope (though I may be wrong) would not adversely effect the economy of the car when in factory mode and are as follows:
Better downpipe and exhaust throughout the rest of the car
Larger or more efficient intercooler
Larger injectors (which may have a negative effect on economy I hope proper ECU tuning can work out for the factory mode)
And for the sake of peace of mind, gauges to monitor boost, EGT and other functions that I may need to keep a eye on.
Thoughts? Please correct me if I am wrong in my thinking. I am actually taking this idea from a turbocharged gasoline (capri xr2) car I used to enjoy modifying.
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VW TDI high performance and stock economy
I posted this on another TDI specific site, but I figured I would post it over here too so I could catch some other TDIers opinions 
I have been thinking about modifying my newly acquired TDI. Diesel is a new thing to me, but I am very capable with conventional gasoline engines. I got rid of my "street" jeep to get this TDI for the sake of fuel economy but the hot-rodder inside of me has a hard time not modifying anything.
So in an attempt to heighten the performance of my Jetta while retaining the economy of it I want to ask if anyone has any experience with a dual stage set up on their car.
I am thinking the use of a dual-stage boost controller with one setting at the factory level and the other setting at a higher lever (dependent upon supporting modifications).
Accompanying the dual-stage boost controller would be a system for supplying the correct amounts of fuel for both boost setting. i.e. a factory fuel map for the factory boost and a tailored fuel map for the higher boost.
I have been doing a bit or reading but so far I have not seen anything specifically for the VW Jetta TDI that would support that? Or is there something and have I missed it? For the sake of my project I would not be against running two ECUs (one with the factory settings, or tailored to run as close to factory as possible with larger injectors, and one ECU with the custom settings) with the supporting wiring to be able to switch back and forth.
Supporting modifications would be ones that I hope (though I may be wrong) would not adversely effect the economy of the car when in factory mode and are as follows:
Better downpipe and exhaust throughout the rest of the car
Larger or more efficient intercooler
Larger injectors (which may have a negative effect on economy I hope proper ECU tuning can work out for the factory mode)
And for the sake of peace of mind, gauges to monitor boost, EGT and other functions that I may need to keep a eye on.
Thoughts? Please correct me if I am wrong in my thinking. I am actually taking this idea from a turbocharged gasoline (capri xr2) car I used to enjoy modifying.
lowNslow is online now Report Post Edit/Delete Message
I have been thinking about modifying my newly acquired TDI. Diesel is a new thing to me, but I am very capable with conventional gasoline engines. I got rid of my "street" jeep to get this TDI for the sake of fuel economy but the hot-rodder inside of me has a hard time not modifying anything.
So in an attempt to heighten the performance of my Jetta while retaining the economy of it I want to ask if anyone has any experience with a dual stage set up on their car.
I am thinking the use of a dual-stage boost controller with one setting at the factory level and the other setting at a higher lever (dependent upon supporting modifications).
Accompanying the dual-stage boost controller would be a system for supplying the correct amounts of fuel for both boost setting. i.e. a factory fuel map for the factory boost and a tailored fuel map for the higher boost.
I have been doing a bit or reading but so far I have not seen anything specifically for the VW Jetta TDI that would support that? Or is there something and have I missed it? For the sake of my project I would not be against running two ECUs (one with the factory settings, or tailored to run as close to factory as possible with larger injectors, and one ECU with the custom settings) with the supporting wiring to be able to switch back and forth.
Supporting modifications would be ones that I hope (though I may be wrong) would not adversely effect the economy of the car when in factory mode and are as follows:
Better downpipe and exhaust throughout the rest of the car
Larger or more efficient intercooler
Larger injectors (which may have a negative effect on economy I hope proper ECU tuning can work out for the factory mode)
And for the sake of peace of mind, gauges to monitor boost, EGT and other functions that I may need to keep a eye on.
Thoughts? Please correct me if I am wrong in my thinking. I am actually taking this idea from a turbocharged gasoline (capri xr2) car I used to enjoy modifying.
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Hey Evil-Diesel I had a question in your signature it says "Precat Exhaust Dump + 0 lambda" what exactly is that? Thanks!
Its a cutoff from the exhaust system in which i have an electric switch to open and close.
In the pic you can see the pipe that branches off before the cat off the downpipe. that opens up the exhaust to have absolutely no back pressure. I had to move the cat down stream alittle to fit the new piping and electronic motor. The 0 lambda is a O2 sensor delete. so there wont be any cutback of fuel from the ecu if it sees any kind of emssions overload.
(This is all for off-road use)
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