Wastegate mod?

[Ron's power stroke]

doing this mod gives you faster spool up and lets you build 30 to 32 lb of boost... only down side is the stock turbo is only efficient up to 25 lb of boost..after that it just super heats the air and make EGT's climb faster..too much over boosting will shorten the life of the bearing in the turbo...on a stock turbo ..the back pressure is way off after 25 lb of boost to make a good balance for the wheels..

[dikdragon]

Thanx for the feedback, I went out and tried it, floored i hit 23-24 psi, normaly around 20, did spool up faster, couldnt really tell more hp but held pull between shifts a little better. still a little worried about doing any harm to motor/turbo

[Ron's power stroke]

thats good for a non chipped truck..you did plug the end of the red line right??? you wont hurt the motor..the turbo should be ok your still under 25lb of boost... but if you get any surge .then you got to let off the go peddle.....i love the fast spool up as well..

[vitalidle]

Originally Posted by dikdragon

Thanx for the feedback, I went out and tried it, floored i hit 23-24 psi, normaly around 20, did spool up faster, couldnt really tell more hp but held pull between shifts a little better. still a little worried about doing any harm to motor/turbo

If you don't have a boost fooler don't worry about hurting anything as you will defuel around 25 psi anyway

[dikdragon]

I do have the edge juice, can u guys desribe to me what the turbo surge feels like? I've been reading about it in other posts, but dont understand what it is.

[vitalidle]

In a nutshell turbo surge is the loss of normal air flow through the turbo compressor wheel, and if the area gets large enough can lead to turbo surge. Surge is a repeated momentary loss and then recovery of all normal air flow Basically the compressor stalls and then turns again its very hard on the shaft and bearings.

[Ron's power stroke]

What is compressor surge?
The surge region, located on the left-hand side of the compressor map (known as the surge line), is an area of flow instability typically caused by compressor inducer stall. The turbo should be sized so that the engine does not operate in the surge range. When turbochargers operate in surge for long periods of time, bearing failures may occur. When referencing a compressor map, the surge line is the line bordering the islands on their far left side.
Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain. This condition causes the airflow in the compressor wheel to back up, build pressure, and sometimes stall. In cases of extreme surge, the thrust bearings of the turbo can be destroyed, and will sometimes even lead to mechanical failure of the compressor wheel itself.
Common conditions that result in compressor surge on turbocharger gasoline engines are:
A compressor bypass valve is not integrated into the intake plumbing between the compressor outlet and throttle body
The outlet plumbing for the bypass valve is too small or restrictive
The turbo is too big for the application

you can learn a lot about turbo's with this link

TurboByGarrett.com - FAQ's

[dikdragon]

Sometimes at medium throttle i get a hikup, like a short defueling, could this be turbosurge?

[Ron's power stroke]

that could be boost spike
A boost spike is a brief period of uncontrolled boost, usually encountered in lower gears during the onset of boost. Typically spikes occur when the boost controller cannot keep up with the rapidly changing engine conditions.

surge will sound a lot like a pressure cooker..

[Tuckin49s]

If I just crimped my waste gate line would that work too?