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Gtx3576R.


xrr40l

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  • Carnage on the Garage Floor
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  • Member For: 14y 6m 6d
  • Gender: Male
  • Location: Gold Coast

And that would be my car that mattyP heard :)

Had a play with a friends GT335 on the way home tonight that I've run before and oh my...I destroyed it. I mean like, have they pulled on their handbrake stuff. I love this turbo. The power delivery is nuts. 360rwkw v 360rwkw - GTX v MTA750, feels like tuned v stock by comparison on road. Yes, it's that good :)

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  • Carnage on the Garage Floor
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  • Member For: 14y 6m 6d
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  • Location: Gold Coast

^^^ Got plenty on this month with the club mate but I can squeeze it in I'll go. I look forward to getting it on track again and running against cars I've played with already.

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  • Member For: 11y 7d
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What are you hoping for gun?

And guys

The gtx3576 sounds unreal from another car

hey mate.. results are in .. sorta :/

the valve springs kept me from making power increasingly over 6200rpm previously.. these were done b4 new tune..

Ended up with 365kw or 490hp on the 98tune BUT the MTA issue where rose where it wont allow us to increase boost anymore so this figure is still on 17psi :(

The verdict is to run a spring pressure closer to the desired boost level so piss off the 12psi spring and upgrade to a 17psi setup..

ALSO at the same time in allowing the car to rev more with the valve springs I seem to have LOST 50-60 torques and a bit of motive force :'( although iv made 10 more KW... AND the Turbo is all of a sudden 100rpm more laggier than the previous dyno session too :/

Iv uprated the Tailshaft since last dyno and done the valve springs and seem to have gone a fair bit backwards ..

We didnt do the E85 tune as there was no use trying to turn up boost till the actuator error is sorted.. booked in for 10 days time..

VERY keen to get the GTX core and swap it over in the meantime although id keep my .82 rear I think..

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  • Carnage on the Garage Floor
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  • Member For: 14y 6m 6d
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Sorry to hear someone else going through the same butt hurt. It's comes up a bit with this turbo unfortunately - shop to shop.

To be fair to my 750 as I said in my build thread, my problems were essentially attributed to a dodgy bov. So, I never saw it's full potential. That said, at around the 360 mark on 98, you can't beat the small GTX in my opinion. The car is considerably quicker at that power than what I had with the 750. It would obviously make more up top if dialled up. My comparison though which was within 1-2psi boost with the same final output and the GTX kills it.

I'd be making sure your port & flapper is 100% - yes run an actuator closer to desired boost and bin the old bosch bov. That will give you the best chance with now proven combinations that have cured boost control issues running the 750. Ironically, the last problem I heard was a car making too much boost (22psi) that couldn't be reduced.

As for running a .82 rear. Mine spools on cold start program - no bullsh*t. It is making boost from 1200rpm and strong from 1500rpm. So, I'd personally stick with the 1.06.

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