Precision Billet Turbos

[Lithium]

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

 

[SimonR32]

5558 on a RB25 with 20psi on 98

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

[Lithium]

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

Edited December 20, 2018 by Lithium

[feedmyfast]

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. 

[ido09s]

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.

[feedmyfast]

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). 

[feedmyfast]

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

[Dale FZ1]

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

[feedmyfast]

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.

[r32-25t]

What did you have on it before?

[33GTRV]

What size rear housing?

[feedmyfast]

On 1/4/2019 at 2:16 AM, r32-25t said:

What did you have on it before?

Borgwarner S366

On 1/4/2019 at 6:14 AM, 33GTRV said:

What size rear housing?

on my current Borgwarner setup? 88AR

[Lithium]

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?

[s13vert]

Hey just wondering if anyone has had much experience using the 6875 thanks

[feedmyfast]

On 1/7/2019 at 5:29 PM, Lithium said:

Nice, what hotside did you choose?

Ended up with a .81AR

[SimonR32]

6870 vs 9180 back to back

[usmair]

26 minutes ago, SimonR32 said:

6870 vs 9180 back to back

which is which lol

 

[SimonR32]

The precision is the ones that comes on way earlier and makes more power...

I'd like to see the transient response make up for that deficit 

[Lithium]

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

[SimonR32]

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