turbo

[rtstk]

hi just wondering what would be a good straight bolt on turbo upgrade for my legacy gt bg5 without changing to single as my primary just sh*t itself lol

any help would be great

cheers.

RTSTK

[telemekas]

What primary turbo is on your car now?

[rtstk]

as far az i know vf13

[telemekas]

The VF13 is the very first TT primary turbo. Therefore any primary turbo from then onwards would be an upgrade and will be a straight bolt up (with the exception of the VF33).

Recommend in order of response VF31, VF25 or VF26.

[Volcanix]

if u want a cheaper option i have a primary and secondary turbo from a Bd5 rs sitting in my garage looking pretty? they have only done like 100thou km went really well untill i upgraded them

[Joker]

which order tele?

best to worst?

I would assume worst to best with 26 being the pick of the bunch?

mind you I have a 31 & achieve 18psi @ 2500RPM's with high boost setting (spikes)

[rtstk]

 Volcanix said:

if u want a cheaper option i have a primary and secondary turbo from a Bd5 rs sitting in my garage looking pretty? they have only done like 100thou km went really well untill i upgraded them

howmuch u after???? howmuch to get shippd to aux???

just thought mite azwell give it a few upgrades now that its given me a chance hahahaha lol :D

[telemekas]

 JoKer said:

which order tele?

best to worst?

I would assume worst to best with 26 being the pick of the bunch?

mind you I have a 31 & achieve 18psi @ 2500RPM's with high boost setting (spikes)

"Recommend in order of response VF31, VF25 or VF26"

The VF33 is ball bearing turbo with P11 turbine housing. Therefore the fastest responding of all primary turbos.Has the same wheel set as a secondary VF32.

The VF25 and VF26 are non ball bearing with P12 and P14 turbine housings respectively.Both use the same wheel sets as a secondary VF27.

All the other suitable primary turbos though they are ball bearing, sit on P16 turbine housings.

[rtstk]

what would be a good bolt on turbo combo?

[Volcanix]

 rtstk']

[quote name='Volcanix said:

if u want a cheaper option i have a primary and secondary turbo from a Bd5 rs sitting in my garage looking pretty? they have only done like 100thou km went really well untill i upgraded them

/quote]

howmuch u after???? howmuch to get shippd to aux???

just thought mite azwell give it a few upgrades now that its given me a chance hahahaha lol :D

ehh open to offers, if they dont sell soon i might canabalise one and have me a looksee whats inside one and try and rebuild it after breaking it haha

[telemekas]

For low end response with matched wheel sets:

VF31 with VF32 or VF25 with VF27

For more top end:

VF26 with VF27 or PE1016F(VF31 on a shaved P16 housing) with VF32

Depending on whats available you can use either VF32 or VF27 as a secondary as they have similar flow rates.

[hijacka]

 rtstk said:

what would be a good bolt on turbo combo?

A vf38 twinscroll and a vf22 for secondary

[rtstk]

if i went with the vf31 and 32 combo would i need to upgrade my injectors etc...???

[Joker]

nope

[Garryg]

 rtstk said:

if i went with the vf31 and 32 combo would i need to upgrade my injectors etc...???

Sorry to jump in on this thread.....

Are theses a straight forward bolt on option? Are any other mods required?

Boosting 18psi is a dam sight better than what I'm getting at the moment (7 rising to 8psi).....

Cheers

[zarnah]

 hijacka']

[quote name='rtstk said:

what would be a good bolt on turbo combo?

/quote]

A vf38 twinscroll and a vf22 for secondary

This

[GravelBen]

 Garryg said:

Boosting 18psi is a dam sight better than what I'm getting at the moment (7 rising to 8psi).....

If you're only getting 7-8psi then chances are something is wrong and switching to different turbos isn't likely to change that. MAP sensor maybe, when mine cut to 7psi but otherwise ran smoothly as usual that was the culprit.

[aim]

Naw 8psi, that's about right on primary for a pre-facelift RS isn't it? I think that's what mine was at.

If you upgrade the primary, IIRC you must upgrade the secondary to a an identical cfm turbo, otherwise you'll put extra back pressure on the secondary.

Also could there be issues if the ECU thinks you're overboosting?

[Volcanix]

my 93 rs was at 10psi primary and 14 secondary untill i swapped turbos