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Hi all,

I have a pair of new GT2560R turbo’s to install into my Zed this coming week. They have the 5 bolt exhaust housing, but I have reused the compressor housing. The actuators have been upgrade (larger) to cope with the higher boost.

Because I have the standard compressor housing, do you think I will have enough room for mounting? Or do you think I will need to get smaller actuators such as the HKS items?

I’m hoping maybe someone has done this upgrade and can tell me for sure before I pull the engine next week.

 

IMG_2537Medium.jpg

 

Left is the same as the actuators I have, right is the smaller HKS actuator.

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Guest andyduff

You've fitted the stock compressor housings onto the uprated turbos? Its the compressor side of the turbos that limit their efficiency under high revs/boost! Refit the proper compressor housings or you'll be disappointed! Sorry if I misread your post...

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WTF! I apoligise, there is dylexia in all its glory!!! I have the stock compressor housing, that has been machined out to fit T-28 core. The turbine housing is larger, and requires 5 bolt dump pipes. These trubo's will flow 22psi max, but peak power will be around 18psi. They are good for 270rwkw+

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Guest andyduff

Yeah I see what you've done. You will still have inefficiency problems though due to the diameter of the compressor outlet. At a certain flow the air velocity will hit sonic speed, once this is reached, no matter how much pressure you try to produce, the flow will not get any greater... I'd seriously look at getting the original housings replaced and the fab work required to adapt them to the VG30 pipework...

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We'll see :cool:

 

Like I said before, I'm not after mega power. It's going to more than enough power for a daily driven car. I too know what you're saying. But wait till I've been on the dyno.

 

I know a guy with a similar setup to mine, but he's still using 4 bolt exhaust housing. He achieved a very impressive 280rwkw at 18psi (with stock injectors). I'd be happy with that :nana2:

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  • 2 weeks later...
  • 2 months later...

Results:

I went on the dyno last week. Had a few issues I still need to iron out, but overal happy with the war the Zed preformed.

First run was with stock boost and I made 210rwkw. We tried a few runs at 0.8bar and I made 239rwkw. Most boost we tried was 1bar and that saw 256rwkw. The was all with the stock fuel system.

The turbos were VERY responsive, couldn't be happier. Once I upgrade the fuel system, I should see around 290rwkw at 1.2bar.

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