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Precision Billet Turbos

R32GTR/Iceland
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Lithium Grand Master

Lithium

Posted
Posted
On 12/19/2018 at 11:50 AM, feedmyfast said:

Yes, intend on staying with the T4 open housing so I won't have to spend too much money for an already expensive upgrade. I am definitely looking for some headroom for other mods (stroker / RB30) in the future. Looking for a turbo i can run now and not have to toss aside when i do the next setup. 

OK, sortof makes sense.  When you do the stroker/RB30 upgrade is that for more power or more drivability?   Realistically a turbo which is "all in" in the low 4000rpm range on an RB25 isn't necessarily going to be that large a turbo on an RB30... or a turbo which justifies a solid RB30 build is going to bit a bit lazy on an RB25 unless you are actually targetting more of a punchy road car setup.

You could get a 6466 with a smaller T4 hotside for the RB25, and order a larger one for when you go with the RB30... just to try and take the edge off.   A 6466 would likely be "all in" late 4000rpm range on an RB25

 

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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
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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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Lithium Grand Master

Lithium

Posted
Posted (edited)
18 minutes ago, SimonR32 said:

5558 on a RB25 with 20psi on 98

Going to be fairly rapid in a 240Z, especially once some E85 is used

 

That's a pretty nice long powerband - is this a Gen2 one?  What hotside?   It's fairly lazy for a 55mm turbo, though not so lazy for the power level

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feedmyfast Rookie

feedmyfast

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19 hours ago, Lithium said:

OK, sortof makes sense.  When you do the stroker/RB30 upgrade is that for more power or more drivability?   Realistically a turbo which is "all in" in the low 4000rpm range on an RB25 isn't necessarily going to be that large a turbo on an RB30... or a turbo which justifies a solid RB30 build is going to bit a bit lazy on an RB25 unless you are actually targetting more of a punchy road car setup.

You could get a 6466 with a smaller T4 hotside for the RB25, and order a larger one for when you go with the RB30... just to try and take the edge off.   A 6466 would likely be "all in" late 4000rpm range on an RB25

 

The stroker / RB30 would be just to make more reliable power.

thanks for the suggestion! the 6466 with different turbine housings sounds like it would be the most flexible approach. 

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ido09s Mentor

ido09s

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Posted

reliability comes from the engine builder and the parts used to put the engine together mate. I wouldn't say an RB30 is going to be more reliable than an RB25/26.

My engine has been in the car for 15 years now. Its made anything between 350rwkw to the now 500rwkw. Its a standard RB26 block with stock crank. About the only mods it has are some GReddy rod and pistons and some head studs. Standard crank bolts are in it even and we used to rev it to 9200rpm. Its nothing special but it was put together properly and that's why it has stayed together.

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feedmyfast Rookie

feedmyfast

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14 hours ago, ido09s said:

reliability comes from the engine builder and the parts used to put the engine together mate. I wouldn't say an RB30 is going to be more reliable than an RB25/26.

My engine has been in the car for 15 years now. Its made anything between 350rwkw to the now 500rwkw. Its a standard RB26 block with stock crank. About the only mods it has are some GReddy rod and pistons and some head studs. Standard crank bolts are in it even and we used to rev it to 9200rpm. Its nothing special but it was put together properly and that's why it has stayed together.

Reliable in the sense of less stress on the motor. A RB30 will make the same amount of power with less boost just to the increased displacement (in theory). 

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Dale FZ1 Veteran

Dale FZ1

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2 hours ago, feedmyfast said:

I purchased a 6466. should be installing it within the next few weeks. I'll post the new dyno graphs when I tune the car

Well done!  Presuming CEA?  Split pulse or single scroll?

Post up a couple of pics of the installation

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feedmyfast Rookie

feedmyfast

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13 minutes ago, Dale FZ1 said:

Well done!  Presuming CEA?  Split pulse or single scroll?

Post up a couple of pics of the installation

Yes that is right. CEA GEN2 6266. Single scroll T4.

Will do! i can't wait to install it. just need a few things beforehand, (5 BAR map sensor, fittings ,etc). I was told the 6466 really wakes up around 25 lbs. I only have a 3.5Bar sensor,  so I would run out sensor range fairly quickly.

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Lithium Grand Master

Lithium

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Posted
On 1/3/2019 at 5:48 AM, feedmyfast said:

Happy New Years All! Quick update I purchased a 6466. should be installing it within the next few weeks. I'll post the new dyno graphs when I tune the car

Nice, what hotside did you choose?

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SimonR32 Grand Master

SimonR32

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3 hours ago, Lithium said:

First time I've ever seen a 6870 come on earlier than a 9180, what other changes were made?

Direct back to back change... Same boost, 30psi

6870 made even more power with extra boost while the 9180 was all out

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