Precision Billet Turbos

[NYTSKY]

PJ....that R34 with the stock bottom end and stock cams....what was the power at the hubs? Im presuming the dyno run is showing corrected power at the fly? Im in the UK and I want to run a single on my Forged RB26 in my R32 GTR (Stock head and cams). Im going with a T3/T4 topmount manifold and was looking at the 6262.....I want 500BHP at the hubs at no more than 25PSI.......is this gonna be do-able with the 6262? Im looking for spool compariable to uprated twins but with the ability to crack 500BHp at the wheels. What do you reccomend guys??? Exact turbo specs please?

Oh.......why all the reference to 4 Cylinder Nissan engines and even worse Toyota engines??? Surely you guys must be all running 6 cylinder RB's in the main???? Just find it a little strange as in the UK where im from there isnt a lot of skyline interest in 4 cylinder mills....its all RB26/26/30 etc.......

Cheers

Andy

Is it a T3 or T4 manifold, you cant have both.

[Andy B]

I'm buying this manifold.... Check out the description mate.....http://www.ebay.com.au/itm/320834139081?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

[GTScotT]

Is it a T3 or T4 manifold, you cant have both.

Now you can!

They are making manifolds with flange plates which have the bore of a T3 and the footprint of a T4 with the bolt holes for both.

Sounds OK. Flexible

[Andy B]

PJ........post back bud?? were your R34 GTR results at the hubs or crank???

[R31Nismoid]

Neither - watch the video. It's clearly a chassis dyno...

[Andy B]

Chassis dynos normally read either corrected power at the flywheel or the power at the wheels (same as hub power isn't it??)??

[Andy B]

So back to my initial question... Is that bhp measurement showing power at the wheels or corrected at the flywheel?

[GTScotT]

Your in the UK arent you Andy B?

In OZ we measure actual energy at the output point. Thus if we are on a Hub dyno we are measuring energy at the hubs and if we are on a Chassis dyno we are measuring energy at the wheels.

Obviously the hub dynos read a little higher as the wheels sap a little energy away on the chassis dyno.

We normally want to know what sort of power we are putting to the road, it is a good indicator of the cars performance. Take our fabled Commonwhore V8's for example, some of the older LS1 models rolled out of the factory with something along the lines of 280kw (flywheel rated), yet you chuck them on a dyno and should be pleased if you have 200rwkw.

Yanks are also guilty of calculating flywheel HP through a chassis dyno or similar, sort of misleading IMHO. I would rather know what sort of energy I put to the road than what sort of energy I could theoretically put to the road lol

[Andy B]

Thanks Scott.....so PJ's R34 Vid is showing BHP at the wheels then?

[Lithium]

Yes.

Jason - I've never seen a yank estimating flywheel power.

[Andy B]

Guys,

Estimating Flywheel power is comon here in the UK and yes, I agree its a load of BS. Power at the wheels is where its at. Im surprised the PT 6262 mande nearly 500BHP ATW..........................

[Andy B]

made even....lol (time for bed me thinks!!)

[Lithium]

Plenty have made 500whp on normal GT3582Rs, a PT6262 is a bigger turbo again. When E85 has been involved, the 6262s have gone well north of 600whp...

[GTScotT]

Yes.

Jason - I've never seen a yank estimating flywheel power.

I'll show you some later besides the point bloody yank lover

[R32GTR/Iceland]

i saw that sound performance in the US were testing the 6266 on a stock motor/w kelford cams 3.0 ltr 2JZ with a cast manifold it made 748 whp and 730 tq @ 29 psi on E64 and say they can squeeze 800whp out of it with more boost. He did one pull on pump gas also and made about 530 whp @ under 20 psi

[bigmikespec]

Do compressor maps exist for these?

[Andy B]

6266.... What's the specs on that? It's bigger than the 6262 I presume??

[R32GTR/Iceland]

6266.... What's the specs on that? It's bigger than the 6262 I presume??

its a newer wheel from precision thats for the 67 and 62 turbos , spools for example 6766 spooled better and picked up 35 hp over the 6765

some more info about it and price on the Sound Performance site 899 US dollars for the normal journal bearing one

spracingonline.com/store/Precision_62mm_CEA_Billet_Turbo_6266

here is the dyno sheet from the stock motor 3.0 ltr 2JZ using a 6266

Here is a comparison between a 6765 and a 6766

Edited February 17, 2012 by R32GTR/Iceland

[Andy B]

That looks great but has anyone put one of these on a 26?? I see loads of high boost RB30 examples but I wanna see a 26 ..... Not running on E85.... Just pump gas . Can anyone post up such results? A good turbo on a 26 with std cams and pump fuel should be able to make 500whp well under 2 bar......spooling at less than 3500 and making full boost by 4500........ Anyone???

[R32GTR/Iceland]

some more info on a 6266 on a Supra / 2JZ

amazing results !

Craig's Supra:

Precision 6266 CEA Billet .81 A/R

3.4L Stroker with 9.5:1 CR

Kelford 274 cams

Built but UNported Head

Hypertune Intake Manifold

Approx 683whp/590wtq and crossing 300ft-lb @ 2900rpm on SP's mustang dyno. @ 18.3 psi

770whp/700wtq @ 24 psi

843 whp wtq @ 29 psi

300wtq @ 3000rpm

Peak Torque @ 4800rpm

Peak Power @ 5300rpm

Steady Power through 7800rpm redline

959 RWHP and 941 TQ on a 6266 with nitrous !!! Boost hit 38 psi then fell to 29 where it actually makes peak hp. 125 shot of nitrous.

6266 with nitrous