Precision Billet Turbos

[Lithium]

A mate of mine has been building his RB25 for AGES, has a PT6765 CEA for it and was aiming for around 800hp @ hubs - the 66s seem like a decent improvement too. I've prefered the HTAs up till now, still quite interested to see more PTxx66 results and see if they have made up some of the difference. Another mate has a GT3586HTA on his RB30 running >700hp @ hubs on relatively mild boost levels and E30, was held back by fuel system - was still gaining power.

[Andy B]

Thats cool but the supra is 3 litres and this ones taken out even more.... We need to see some RB26 results to be able to fully understand if this turbos gonna be a lag monster or not ??

[sky30]

How does the gt35 hta compare to gtx35??

[luke gtr]

Thats cool but the supra is 3 litres and this ones taken out even more.... We need to see some RB26 results to be able to fully understand if this turbos gonna be a lag monster or not ??

Try it, let us know, kthanxbi

[Andy B]

Luke, i havent got the cash to be experimenting with turbo selection, thus why I asked if anyone had run one of these on a RB26?? thanxbibacktoutoo

[Lithium]

ITP Race cars tuned a Skyline with a stock RB25 running a PT6262 BB turbo and made >350kw @ wheels on 98 octane, looked really good but the impression I got from the dyno plot was that it was making full boost in the area of 5000-5500rpm.... fairly inline with the impression I've always had of the PT6262s, quite laggy but quite potent.

How does the gt35 hta compare to gtx35??

Never seen a comparison, but I'd suggest that the HTA GT3582R would spool better and be more responsive than the GTX3582R but that GTX3582R would be capable of more power.

[sky30]

ITP Race cars tuned a Skyline with a stock RB25 running a PT6262 BB turbo and made >350kw @ wheels on 98 octane, looked really good but the impression I got from the dyno plot was that it was making full boost in the area of 5000-5500rpm.... fairly inline with the impression I've always had of the PT6262s, quite laggy but quite potent.

Never seen a comparison, but I'd suggest that the HTA GT3582R would spool better and be more responsive than the GTX3582R but that GTX3582R would be capable of more power.

Would GT3586Hta make more than GTX3582?

[Lithium]

Not sure, would be interesting to see - I'd say it should have the advantage.

[Ryan1200]

Would GT3586Hta make more than GTX3582?

Purchase a GTX and ill carry out some back to back tests on my 1200 drag car. hta will gtx

[Lithium]

The GT3586HTAs have definitely made some insane power, and are my preference... though the GTX3582Rs aren't exactly shrinking violets.

Garrett used slightly misleading naming on their Garrett GTX range, the GTX3582R for example has a 83mm exducer - or 85mm if you factor in the extended tips. The old GT3582R had a 61mm inducer, while the GTX3582R inducer is 62.5mm (bigger than PT6262) which is getting up there considering a GT4088R is 63.5mm! Its a substantial sized compressor they are using, it'd be really interesting to drive a GT3582R and GTX3582R car back to back to see the difference.

[B-rice]

OK guys im trying to achieve 400hp with stock internals. Anyone reckon i could do that for about 6 months before she blows. and im also having a big debate over the GT-RS and the Precision turbo PT5558. Which one would be more suitable for a street car which low to mid range boost but lso with some reasonable power.

[sky30]

The GT3586HTAs have definitely made some insane power, and are my preference... though the GTX3582Rs aren't exactly shrinking violets.

Garrett used slightly misleading naming on their Garrett GTX range, the GTX3582R for example has a 83mm exducer - or 85mm if you factor in the extended tips. The old GT3582R had a 61mm inducer, while the GTX3582R inducer is 62.5mm (bigger than PT6262) which is getting up there considering a GT4088R is 63.5mm! Its a substantial sized compressor they are using, it'd be really interesting to drive a GT3582R and GTX3582R car back to back to see the difference.

a guy on sau has done gt35 to gtx35 on his car, gained some top end power, but lost midrange and response.

[B-rice]

anyway im after a precison billet turbo that would have a low to midrange power band. and also has the capability to produce 300kw, so im thinking along street/race turbo of some sort. any help

[Rolls]

what engine?

[GTScotT]

OK guys im trying to achieve 400hp with stock internals. Anyone reckon i could do that for about 6 months before she blows. and im also having a big debate over the GT-RS and the Precision turbo PT5558. Which one would be more suitable for a street car which low to mid range boost but lso with some reasonable power.

anyway im after a precison billet turbo that would have a low to midrange power band. and also has the capability to produce 300kw, so im thinking along street/race turbo of some sort. any help

I will assume you have an RB powered car, in which case I will say both the GTRS and 5558 are poor options for 300kw.

Firstly the GTRS is not capable of getting you there, that is a 250kw job and thats it. The Precision is a high boost application and will need E85 to make it a comfortable result.

There are better/easier methods of hitting the 300 mark on an RB (assume RB25 from here), I would recommend you look at a GT30 based turbo or a hypergear G3 unit. The GT30 has great resale and is a well proven item, it will need a custom dump/lines/intake. The hypergear G3 will need the custom intake pipe but will work with most of the stock lines and will bolt up to the OEM dump. The G3 is probably a little more likely to hit 300kw on 98 but the GT30 will be a little more responsive (both run a .82 IW housing).

If you want to move to an externally gated option you can pick up one of the 'steampipe' manifolds for a good price and look at a kando T67 for you 300kw mark. That will be more likely to net 330kw, and the mentioned kit totals roughly the same as a hypergear and much less than the said GT30.

Now back to precision turbos.

[sky30]

what engine?

Rb30/25. Guy called jarrod, not sure if he posted his recent results on sau, but he lost a few hundred rpm in response.

[Lithium]

The new Precision PT6465CEA is now out and Sound Performance have tested it out against a PT6266 and PT6766 on a couple of different engines. First is a bog stock 2JZ running E85 on 36psi:

Then just for prosperities sake they ran the same turbos to their limit on a fully built 3.4litre:

Interesting to note that the 64mm made more power everywhere on the stock motor running "less than maxed out", the 67mm only came into its own when everything was pushed to their limits - which really shouldn't be too surprising.

[bigmikespec]

The 6466 seems like a good balance.

[GTScotT]

Sounds like I need to buy a JZA80, today.

I need to revisit the SR results buried in this thread. Faith has been bestowed.

[Weapon X]

We are making dyno runs with a 6766 CEA now on 93 oct fuel. I'll post up some vids and pics once it stops making power with more timing. I think I'll order a 6466 to try.

Edited March 30, 2012 by Weapon X