Jump to content
SAU Community

Precision Billet Turbos

R32GTR/Iceland
 Share

Recommended Posts

  • Replies 3k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

SimonR32
SimonR32

The 6262 sillyness is never ending... New cams just got the most power and torque it's ever made

SimonR32
SimonR32
Mick_o
Mick_o

Dale is 100% correct its a well proven fact that smaller cams in RB's aid in response. Even going from a stock cam to a type b pon cam will cost you response. Been many track guys that have thrown the

Posted Images

Lithium Grand Master

Lithium

Posted
Posted

We'll, forgive me for being a sceptic, but I need to see a timeslip or data log to believe. This thing still makes 200 ftlbs more than I thought possible and spools earlier than a 35r. Crazy!

Did you see the boost level it is running? Most RB26s aren't running nearly that, and it is twin scroll which is capable of boosting torque "per psi" versus a single entry... all works well towards making a lot of torque.

In terms of spool, to be honest it did surprise me too - but it is definitely worse than GT3582Rs, particularly than twin scroll ones (keeping it apples vs apples).

More things to consider - if we were to give all these turbos names to match Precision's ones (using wheel sizes) it may put into perspective how big a PT6466 is (or isn't) considering what it can make:

GT3582R - GT6162R

GTX3582R - GT6362R

PT6466 - PT6466

T04Z - GT6765

The 66CEA turbine has by reputation less lag and more flow than the old 65mm T-series Garrett design as well, and the compressor is a light billet wheel - so really for the size they should spool at least as well as a cast wheel equivalent... ignoring aerodynamics :)

Fitting somewhere between a GT3582R and a T04Z really shouldn't be too surprising, which is why it's magic that it's a 600kw @ wheels capable turbo :D

Also worth noting that the 6466 a few pages back looks similar on Chequered Tuning's dyno:

GTRdyno_zps1b56479c.jpg

Be interesting to overlay that and the new Hypergear "ultimate" 500kw turbo

Lithium Grand Master

Lithium

Posted
Posted

Nice work! That is an awesome power delivery, and more in it is always a bonus :-D

SCR48 is in Perth, silly me. Be interesting to compare the results, what are the odds two 2530/6466 setups would be tuned on the same day?

Frosty Grand Master

Frosty

Posted
Posted (edited)

That was my car.

Couldn't go past 27 due to needing to up the breathers on the rocker covers and mainly from frying tyres on the dyno

attachicon.gifImageUploadedBySAU Community1380774170.916023.jpg

nice result man. what rpm was it letting loose on the dyno? given that likey abit more than what thats reading

pretty linear from the 4700rpm mark! almost flat lines

Edited by Frosty
Frosty Grand Master

Frosty

Posted
Posted

Nice work! That is an awesome power delivery, and more in it is always a bonus :-D

SCR48 is in Perth, silly me. Be interesting to compare the results, what are the odds two 2530/6466 setups would be tuned on the same day?

nah he is QLD hick like the rest of them :P

donut_kng Experienced

donut_kng

Posted
Posted

My main thing was that i wanted it be strictly streetable and wasnt fussed about the dyno figure - not that its too bad at all! Therefore I went for a 6466 with .84 twin scroll - I was concerned this would be too big as I was thinking to go for a 6266 originally - although very happy with this setup which is super responsive compared to most cars I have been in, not to mention torquey-as down low due to the RB30.

It has been running for some time on 13psi run in tune which it did 308rwkw on pump 98 - then 20psi on e85 which it did 365rwkw for about 2 weeks.

Even on 20 psi the car is a wild drive on the streets - stepping out in 4th gear once is hits about 4000rpm as if it was second gear (still waiting on half decent tyres to show up).

If I upgrade the catch can (which is small as I wanted it to be hidden) they could push 34psi but doubt I will ever need to, nor bother going to the troubble as this thing has been in the making for over a year now!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Mistakes were made, my R34 Story

      By MBS206 · Posted

      The oil pressure sensor for logging, does it happen to be the one that was slowly breaking out of the oil block? If it is,I would be ignoring your logs. You had a leak at the sensor which would mean it can't read accurately. It's a small hole at the sensor, and you had a small hole just before it, meaning you could have lost significant pressure reading.   As for brakes, if it's just fluid getting old, you won't necessarily end up with air sitting in the line. Bleed a shit tonne of fluid through so you effectively replace it and go again. Oh and, pay close attention to the pressure gauge while on track!
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I don't know it is due to that. It could just be due to load on track being more than a dyno. But it would be nice to rule it out. We're talking a fraction of a second of pulling ~1 degree of timing. So it's not a lot, but I'd rather it be 0... Thicker oil isn't really a "bandaid" if it's oil that is going to run at 125C, is it? It will be thicker at 100 and thus at 125, where the 40 weight may not be as thick as one may like for that use. I already have a big pump that has been ported. They (They in this instance being the guy that built my heads) port them so they flow more at lower RPM but have a bypass spring that I believe is ~70psi. I have seen 70psi of oil pressure up top in the past, before I knew I had this leak. I have a 25 row oil cooler that takes up all the space in the driver side guard. It is interesting that GM themselves recommend 0-30 oil for their Vette applications. Unless you take it to the track where the official word is to put 20-50w oil in there, then take that back out after your track day is done and return to 0-30.
    • PranK
      My new to me M35 Stagea wagon

      By PranK · Posted

      Nice, looks great. Nice work getting the factory parts also. Never know when you'll need them.
    • Chupapy
      New r33 owner

      By Chupapy · Posted

      Thanks @jtha7 I will have a look around tomorrow but it is a prick of a spot. These are some photos i tried taking 
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      I take it that the knock retard is from bearings tapping a little tune? Thicker oil is a fragile bandaid. You need a much bigger oil cooler and probably the bigger pump being discussed.
×
×
  • Create New...