singleboy3

I have a T4 (60-1) hybrid turbo. It has an s5 back side and when my last engine blew the turbo went as well. I was going to get the turbo rebuilt or buy one just like it. The only problem I had with the turbo was the turbo had really bad boost creep. I had the spring set for 5 pds and I hit 14. I heard that if I have an external wastegate custom modified on to the turbo, it would solve the boost creep problem. Does anyone know of a place that can rebuild my turbo and modify it to have an external wastegate? Has anyone done this or had it done before



I can use all the help I can get





caruccio

83turbo

I haven't played with hybrid myself, but I was under the impression that you really can't go over an H-3 compressor with a stock (even ported) wastegate. Also that turbine is really too little for a 60-1 to work efficiently (I would think) even with the boost issue resolved.

Since the S5 is a split scroll, it's sort of more difficult to add an external WG is you want to keep it split. You can, however, get the turbine housing bored to accept a larger turbine wheel (this works on turbos in general - I'm unaware of any reason it couldn't be done to an S5. I've seen it done to an S4 [P trim upgrade]). If you then port the wastegate, you might be okay.

boost_creep

I have seen it done once on a friends car and the cost can be probihitive (very expensive) and my suggestion to you is do an upgrade to a full TO4. The cost might just be a couple hundred dollars difference. Here is a couple of pics I had down loaded so as to assist my friend. This setup was done with the S5 turbine housing.

boost_creep

Doing it this way is very labour intensive. As can be seen from this next pic. Alot of porting is required along with some machining.

boost_creep

The machining that will be required.

setzep

If you have the room you can do what I did to mine.

j9fd3s

whoa! thats crazy lookin!

dvls-7

What wastegate is that?

setzep

It's a 46mm Tial

setzep

Here is another pic of how I tied it back into the DP