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Precision Billet Turbos

R32GTR/Iceland
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Ðemons Contributor

Ðemons

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Good ? on comp Ratio as it hasnt been tested since the built to be honest it has sat in the shed for 3 years with doing nothing. It comes out sometimes & getz fair up it down this road I know quite well. Head work ported Polished supertech vavles. It made 450KW with the HKS To4Z strapped to the side of it with race Fuel 23psi.

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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

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Ryan1200 Proficient

Ryan1200

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Twin scroll ryan 4inch inlet & 3inch out from memory. Has 3.5 inch exhaust but not that thats going to matter its coming straight out of gate so should sound the goods lol.

Cool can't wait to see your results trying to decide whether the 6766 is going to be too small for my new 3.2L thats in the build ATM ;)

Lithium Grand Master

Lithium

Posted
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1000 flywheel hp or as close as I can't get with good spool

What fuel? If on E85 then the Precision PT6466 seems to be the man for shooting in that area - basically every result I've seen for that turbo have been exceptional "for what it is". PT6766 CEA will do it and with a bit of change and a bit more lag, Forced Performance GT3794HTA is not a Precision turbo but I reckon from what I've seen makes me think they have a compressor map more suited to RBs (and 2JZs) - a little wider flow in the 30-40psi boost range (the Precisions definitely need more boost to make these power levels), and they sound awesome. A SLIGHT (ie 100 or so rpm) bit more lag than the two Precision turbos though.

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

Going on a roller (dyno dynamics) tomorrow... Ewwww :(

I'll try and get a run on current tune with same fueling to see roller vs hubber before we play with boost

Awesome :)

SimonR32 Grand Master

SimonR32

Posted
Posted

+1 actually, I've been treating the difference between these two as ~11% (so 600hp @ hubs = 534whp/399rwkw) so will be interesting to see how close this is.

There used to be a fairly well proven 7-8% difference between the hub dyno and a roller, we could repeat it every time.

The hub dyno we use has now been updated with new software and corrections (the 600hp run was done with this) and they are meant to read similar now.

Lithium Grand Master

Lithium

Posted
Posted

Ahh cool, good to know - I had partly based that number off what SAU people insisted when comparing hub dynos and otherwise but have been starting to get suspicious after seeing trap speeds of cars run on DD being much closer to cars with similar Dynapack numbers (ie, my own) but had used that partly because of avoiding angsty Aussies complaining about inflated numbers :)

Keen to hear the results anyway, especially when you nudge the boost up!

SimonR32 Grand Master

SimonR32

Posted
Posted (edited)

Well that was a bit of a fail, there is an issue with the dyno and even with 4wd set to 50/50 torque split the thing was doing burnouts as soon as it came on boost...

Ended up going 560hp but started spinning at 550hp and pretty much flat lined from there. Would have been well over 600awhp on 24psi if it had traction :)

Edited by SimonR32
Frosty Grand Master

Frosty

Posted
Posted

Well that was a bit of a fail, there is an issue with the dyno and even with 4wd set to 50/50 torque split the thing was doing burnouts as soon as it came on boost...

Ended up going 560hp but started spinning at 550hp and pretty much flat lined from there. Would have been well over 600awhp on 24psi if it had traction :)

put 20 fat kids in the back! dont comment until we have results!!! :P

this is still with the 6262 yeah simon?

SimonR32 Grand Master

SimonR32

Posted
Posted

put 20 fat kids in the back! dont comment until we have results!!! :P

this is still with the 6262 yeah simon?

No access to 20 fat kids so it'll have to do. The power was almost ramping vertically when it started spinning and then hovered around 550awhp from 5500-8500.

Yeah 6262 T4 divided 0.8 rear

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