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Gtx Won't Hold Or Increase Boost.


747pwr

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  • Member For: 13y 9m 4d
  • Gender: Male

My understanding is that mechanically it should be able to flow more than 16psi and just make no power due to heat generation/no more air volume if pushed past it's effiencey ?

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  • billet turbos and weathered engines dont mix
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  • Member For: 12y 6m 24d
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  • Location: Wollongong

There's something wrong with your setup somewhere if it's not pushing past 16, these turbos can in theory do 35+ . Check everything again, a GTX is only jussstttt coming into its efficiency range at 16, they really start to shine at 20-23. Something is restricting the turbo wether it be intake/exhaust or the engine can't handle it ie valve springs even though you changed them.

Even your tune?

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To be honest I purchased it under the impression it was the 3582. Mind you as said, for someone chasing something relatively safe on a standard motor and gearbox it really moves, easily blazes first 3 gears in the dry and has spun in 4th if loaded up. Looks like I'll be selling a complete standard FG turbo with 20,000km and the above gtx3576 complete with ported housing and turbosmart gate

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  • Member For: 13y 9m 4d
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Hmmm exhaust and intake setup are brand new, the valve springs are supposed to be the tits and are also brand new ? The turbo can't create more than 16psi even with the gate held shut

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  • billet turbos and weathered engines dont mix
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Wait you have the gtx3582 or 3576? The '76 wil run out of puff at about 400rwkw, but that's still easily over 20psi, where the 82 can keep going. Don't sell it man they're a perfectly matched turbo for our cars. Where are you located?

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  • billet turbos and weathered engines dont mix
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Hmmm exhaust and intake setup are brand new, the valve springs are supposed to be the tits and are also brand new ? The turbo can't create more than 16psi even with the gate held shut

Not saying your lying, it's just they're has to be a problem that you just haven't found yet because it's a proven combo

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I'm pretty confident it's the gtx3576 because it's got the 0.6 front cover. Yeah currently makes 470rwhp through the ZF. Located in Far North Queensland. The current tune is 20psi but it tapers to 16psi at like 4000/4500rpm

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  • billet turbos and weathered engines dont mix
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  • Member For: 12y 6m 24d
  • Gender: Male
  • Location: Wollongong

Id say so mate. If that's the case then you MAY have a dodgy turbo, could still be the tune though or just unlucky and got a dud set of springs. You'll have to wait till the experienced guys chime in, I still only have relatively limited knkwledge

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