Precision Billet Turbos

[Powertune Australia]

I don't think it's a case of how long it will last, moreso how it will break. We pulled the head off on the weekend, pistons were absolutely mint, no detonation marks at all.

We're thinking it will be conrod or gudgeon pin related when it fails. Either way we're looking forward to seeing how.

It is our development car, and we have a BC 2.2L bottom end assembled ready to go when it goes boom!

[Lithium]

Sure is, Lith

Nice!

[SimonR32]

As mentioned previously, we will offer free tuning to a donor RB25DET owner wanting to put one on a 5557 purchased from us. Don't be shy guys If we had an RB25 as one of our project cars it would be on it!

Other side of Australia so no chance of that haha

What are the housing sizes on these things like, I assume you would need a spacer to bolt onto a standard RB25 manifold?

[Powertune Australia]

Yes we would say so for clearance of the front housing

[Lithium]

Have you guys ever tried pushing a GT3076R that hard? How do you think the PT5557 would fare on pump gas?

[Powertune Australia]

I tried (not to that extent) with my 3037S with a 1.12 a/r rear. It made 376kW on 25psi on my SR, we didn't got further as the boost line started to fall. I think that all I would have been doing is overspooling it.

[Rolls]

I don't think it's a case of how long it will last, moreso how it will break. We pulled the head off on the weekend, pistons were absolutely mint, no detonation marks at all.

We're thinking it will be conrod or gudgeon pin related when it fails. Either way we're looking forward to seeing how.

It is our development car, and we have a BC 2.2L bottom end assembled ready to go when it goes boom!

Very interested to see the mode of failure when it does go, could you post a thread up for all of us to see if (when) it does fail?

[Powertune Australia]

Yes, will keep you posted

[dori34]

As mentioned previously, we will offer free tuning to a donor RB25DET owner wanting to put one on a 5557 purchased from us. Don't be shy guys If we had an RB25 as one of our project cars it would be on it!

Wow, good offer kemp, someone should take up on this offer

[Powertune Australia]

Just to let you know guys, we are now offering the 62 and 67 range with divided split pulse T4 housings. This is something new from Precision, I'm sure it will make it a lot more attractive for some of you with twin scroll setups! We have .84 in stock and are able to offer 1.00 and .70

[kn6gtr]

whats the latest with the 7175 on the 34 gtr???

[Powertune Australia]

As much as we're hanging to finish it, it's been put on the backburner since customers cars come first!

[N1GTR]

How large are the 5557's and 5857's please?

I mean in reference to lowmounting two of them to a GTR with an RB30

Anyone done similar before? Maybe a supra?

[Powertune Australia]

We supply the whole billet range from the 5557 to 6765 comes with a 0.70 a/r comp cover, however we can special order the non ported covers which have a 2.8" intake, as far as I'm aware they are a 0.60a/r front, similar to a 3076R in size.

[N1GTR]

Awesome, thanks

It's got GTRS's now, but need more

[Powertune Australia]

Ahhh you boys and your twins haha...

[Powertune Australia]

Well after some Friday arvo beers I managed to Gee the boss up pretty hard, basically I stressed that there was no point in us going out to get kicked off for a mid 10, let's try to run a 9....

So, I came back around 30 seconds later with a 6262SP in hand and it didn't take much convincing. Friday was a party here at Powertune, music cranking, cashews, chips, and within a very short time the turbo was on and the Red Dragon was getting reversed onto the rollers.

Had a solid 5 passes on the dyno, but we knew the 6262 needed a bit more boost to get it in the zone, though 45psi didn't agree with something in the engine! It filled number 2 and 3 with water so we're thinking it's either lifted the head again or cracked the block around a water jacket.

Anyway, I've rocked up here this morning and the engine is out, and 2.2L stroker in ready to go, in fact they're finish up the install of the built engine now with the 6262SP on. Get ready for round 2

[Trozzle]

wow....45psi finally killed it rofl

[SimonR32]

Had a solid 5 passes on the dyno

Power?!?

[Powertune Australia]

We were getting frustrated with it living

The other passes were on a lower boost setting

Well it copped the initial load, then unleashed the tyres with 3 of us in the back which it has never done, it did hold 45psi flat though.

It would have definitely been over 430kW, I'd say 450kW at a guess. Sadly we'll never know!

Will keep you updated when we crack it open to find out the truth