switching turbo cases?

[Evo Eta]

hey everyone, a mate of mine is wrecking his subie and i grabbed a few parts off it nd he mentioned he had vf30 turbo's in vf13 cases so they spin faster or something? does any one know if this is possible and if so is it any better?

thanks

[telemekas]

VF30 is RHF55 while the VF13 is RHF4B primary TT turbo. These have different frame sizes and not compatible for swapping even with machining.

The VF30 NonBB has a P18 turbine back while a VF35 is the same turbo on P15 back.

He may have been referring to a VF31 RHF4B which has P11 back. Power Enterprise swapped the backs of these for P16 to generate PE1016F turbo. The VF13 has P16 back and can be put on VF31 but the seat needs to be shaved for correct alignment.

Changing the VF31 back from P11 to P16 shifts the catch point on the compressor map to the right (therefore later) with approx 10% CFM increase but is further up the rev range.

[Evo Eta]

sorry i miss wrote it, he said vf32 just double checked with him, so with switching them does it make it harder to mount in any way?

[Evo Eta]

nd also would they sell for much?

[Evo Eta]

or would it be worth putting them on my gtb?

[telemekas]

The VF31 primary BB turbo and VF32 secondary BB turbo have the same wheel sets.

The VF32 is a more easily sourced turbo.So remove the CHRA from the VF32 and combined (port comp cover and shave turbine seat waste gate port 2mm) with a primary VF13,VF16,VF18 or VF20 ---> PE1016F

Direct swap no mounting issues.

A new PE1016F is very expensive

http://www.powerenterpriseusa.net/products/turbo/subaru/legacy/legacy.htm

What primary turbo does your GTB have?

[Evo Eta]

s***, i dont know its a 96 gtb the secondary is a vf18 so i assume its mb a 13? nd do you rekon they would be worth keeping then?

[telemekas]

If your primary turbo is VF13,VF16,VF18 or VF20 then repacing it with your "PE1016F home brew version" would be a significant upgrade.

[Evo Eta]

ok sweet, i myt replace the primary with one of my " home brew turbos" haha nd ive got another one, but tht wudnt be worth putting as the second would it? wud i be beta flogging it off? nd also going back to before sorry im abit thick when it comes to this but i still dont really get it, so how do you make a vf13 into a vf32 or whatever?

[Evo Eta]

like what do you when when i dunno what u call it but lets say "switch cases" and are there pros nd cons?

[Joker]

OMG info overload! awesome thread

[telemekas]

 Evo Eta said:

ok sweet, i myt replace the primary with one of my " home brew turbos" haha nd ive got another one, but tht wudnt be worth putting as the second would it? wud i be beta flogging it off? nd also going back to before sorry im abit thick when it comes to this but i still dont really get it, so how do you make a vf13 into a vf32 or whatever?

Depends on what your other turbo is?

The centre section of the VF32 or CHRA ( centre housing rotating assembly) contains the bearing housing and wheel set. The compressor cover and turbine back housing from the VF13 are machined and attached to the VF32 CHRA. (along with the correct WG actuator) -> PE1016F

Essentially the VF13 is high flowed with a much larger and different design compressor wheel. (more cost effective way of doing it no VSR etc required)

[Evo Eta]

shweet, thanks ya really helped me understand it ;D

[off2harrys]

Hahahaha to the above,has mr murch changed hs name?Sounds pretty impressive to us simpletons

[Guest crunchy]

 off2harrys said:

Hahahaha to the above,has mr murch changed hs name?Sounds pretty impressive to us simpletons

no i havent and most of that info is on the net no offence to the poster, apart from any turbo internal parts change its a must to balance and vsr is over rated as theres too much human error with vsr as you can alter the ramp rate getting different reads.

i dont post anymore to much BS goes on have better things to do with my time, and yea yea i just did