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Swapping From Gtx3576 To Gtx3582


747pwr

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  • Member For: 13y 9m 1d
  • Gender: Male

I work away so nothing happening this week- get back mid week and will be picking up new housing and turbo to assemble and put it all back together - hopefully tuned before the weekend

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  • Member For: 13y 9m 1d
  • Gender: Male

Picture of the bay yesterday after installing the gtx3582 dropped it off for a tune this morning on 98.

Initial thoughts - this thing is quiet and wasn't feeling much torque under 3000rpm - mind you was only cruising to the workshop.

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  • I'm getten too old for this s**t
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  • Member For: 11y 8m 5d
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  • Location: A big bridge over a river in South Australia

Ya shoulda told ya tuna to fix it then but no matter now as I see that some very lucky person now has a 76.

Congrats - whoever bought it

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  • Member For: 13y 9m 1d
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Wasn't the tuners fault - last tuning session cut short due to a boost issue/mechanical problem so tuned best we could - got bored one day and started this thread - got some good advice and found the problem, always wanted the bigger turbo and once the 76 sold the swap cost me a couple hundred plus the tune, car was apart and had to retune anyway was kind of two birds one stone.

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  • Member For: 13y 9m 1d
  • Gender: Male

Was on dyno today briefly, under boosting sorted, now over boosting issue with new turbo/housing/wastegate

Dialed in 17psi would make it until 3800 then 20psi by 5000 till red line

I bench tested the actuator would open at 15psi on any preload setting, I set the preload to about 3mm used to compressor to push rod onto waste gate, which was the least preload to make the valve not spin on the housing when I tried. Could still move the actuator rod by hand if hanging off it, way easier than the turbo smart set up

But I read they use much less preload than the turbo smart part.

The flapper valve is a 38mm item and we ported it slightly smaller than previous housing to try keep some more meat to prevent cracking this one.

Does it sound like I set the actuator up right ?

Good chance I'll have to pull off housing and open port up some more ? It was d-shaped like shown on here.

Guess I'll be in shed all weekend

But it did make 400rwkw on 98, reduced timing 17psi building to 20. Which is a start haha

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