View Poll Results: Which Turbo Upgrade?

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  • VF52, aka Spec B+

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  • VF46, aka Spool me Rotin'

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  • VF40, aka K.I.S.S.

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Thread: Which option to go with...

  1. #1
    SLi Resident LunchBox04V's Avatar
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    Which option to go with...

    So, once again the gasket on the turbo oil drain is leaking... It took me 7-8 hours to do it last time and I'd really rather not do it again. However, it is leaking so it needs to be addressed.

    No matter what I do, I have to fix the leak. I figured... while I'm in there, I might as well do a little modding to make it a little more my style.

    I have come down to three options as a solution. All three options will replace the turbo drain gasket, the turbo drain tube (metal part), and the hose to the head. The options are in no specific order:

    VF52 Build - aka Spec B+ (300whp/350wtq) - $1806 -
    - $0 VF52 (Sitting on a shelf in the shop, 12000 miles, zero shaft play, great condition).
    - $690 6StarSpeed Hybrid Ball Bearing Rebuild, Stage 1.5.
    - $630 DeatscheWerks 850cc Injectors.
    - $150 DeatscheWerks DW65c Fuel Pump.
    - $126 GrimmSpeed EBCS.
    - $160 BrenTuning E-Tune.
    - $50 Replace Gasket/Metal Tube/Hose.

    VF46 Build - aka Spool Me Rottin' (230whp/260wtq) - $836 -
    - $500 6StarSpeed Performance Rebuild
    *$150 Core Charge, and I'd have to see if they would be ok with VF40 for VF46.*
    - $126 GrimmSpeed EBCS.
    - $160 BrenTuning E-Tune.
    - $50 Replace Gaskets/Metal Tube/Hose.

    VF40 Build - aka K.I.S.S. (225whp/255wtq) - $710 or $550
    - $500 6StarSpeed Performance Rebuild
    *$125 Core Charge*
    - $160 BrenTuning E-Tune.
    *OR*
    - $0 COBB Stage 2 93 Octane Tune.
    - $50 Replace Gaskets/Metal Tube/Hose.

    So those are the ideas I'm rolling around. Uncle Sam will be footing the bill with my tax return, so the money is not a total issue. My main concerns are:

    - Daily Drive ability.
    - Vehicle Longevity (lol I know, I know, speed reduces reliability)

    Here is the data on my car as it stand now: (I know with my mods it could really use an E-Tune to make the most of what it is now)

    - 2005 Legacy GT Limited.
    - COBB V3 w/ Stage 2 93 Octane Tune
    - 217000 on the Trans and Diffs.
    - 40000 on the motor.
    - New clutch with rebuilt motor.
    - New OEM VF40 with motor rebuild.
    - Stock intake, with K&N (previous owner had it installed) w/torque bulb removed.
    - AVO TMIC.
    - AVO Intercooler to intake hose.
    - Catless up-pipe.
    - SOON Catless down pipe, but currently High flow cat 3".
    - Invidia 3" down pipe back exhaust (Q300, w/quad tips).

    LOL I think that is it for the driveline.

    So, let me know what you folks think. I would love to be able to add a 6MT, and then I wouldn't hesitate at the VF52 build. Thank you for your help in advance. : )
    The three most common expressions in aviation:
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    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

  2. #2
    t3h ub3r m3mber lord flashheart's Avatar
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    Quote Originally Posted by LunchBox04V View Post
    So, once again the gasket on the turbo oil drain is leaking... It took me 7-8 hours to do it last time and I'd really rather not do it again. However, it is leaking so it needs to be addressed.

    No matter what I do, I have to fix the leak. I figured... while I'm in there, I might as well do a little modding to make it a little more my style.
    I used to work for this shop and my boss insisted that i try to change that gasket in the car. meaning without removing anything. It was a super big pain, but i managed to change it in like 30 minutes.
    No, no ,no I'm not insulting you, I'm describing you!

  3. #3
    SLi Resident LunchBox04V's Avatar
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    Really... We talked about doing that the last time... I might have to look into that again. Thing that stinks is at the shop we moved and have yet to put the lift in. (Build engines so don't really need the lift). That might be a task soon. However, the space is not really working out so we may be moving again soon.
    The three most common expressions in aviation:
    "Why is it doing that?"
    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

  4. #4
    SLi Resident LunchBox04V's Avatar
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    I don't know turbos that well... What should be the shaft play on a VF40. Last I checked I had a few mm.
    The three most common expressions in aviation:
    "Why is it doing that?"
    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

  5. #5
    t3h ub3r m3mber lord flashheart's Avatar
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    I build engines too! Yea it was a huge pain in the ass. Book time is like 4 hours for turbo r and r so i personally rather just pull it and do it the right way. And you shouldnt feel any shaft play.
    No, no ,no I'm not insulting you, I'm describing you!

  6. #6
    SLi Lurker nepbug's Avatar
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    If time is a concern I would avoid 6starspeed. They have a reputation of good communication and promise dates until they have your turbo, and then it easily takes 4-5 times as long as they say it would and become impossible to get in touch with. All the consistent reports of this has made me eliminate them for a possible rebuild. They are supposed to do good work, when they get around to it.

  7. #7
    SLi Resident LunchBox04V's Avatar
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    Time is not a major issue... To be honest, I could slap the VF52 in and run it low boost if I needed. Well that does not bode well for my current VF40. : ( (sounds like I'm getting there with shaft play). I did a little more looking an I could probably get away with VF52 as it sits, 740cc DW, and DW200 (255l/hr) for about $500. Lol
    The three most common expressions in aviation:
    "Why is it doing that?"
    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

  8. #8
    SLi Resident LunchBox04V's Avatar
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    Also, anyone know when a VF52 would spool up? I was hoping to do the 6StarSpeed Hybrid ball bearing to get it spooling at 2700rpm. (Might be a crack pipe dream) Aftaid if need to do the full ball bearing to get it there. : (
    Last edited by LunchBox04V; 03-01-2015 at 08:41 PM.
    The three most common expressions in aviation:
    "Why is it doing that?"
    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

  9. #9
    SLi Resident LunchBox04V's Avatar
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    Relieved a response early this morning from 6StarSpeed:

    Thanks for the message,

    At this time we don't have any upgrades for VF40/VF46. The frame is just not robust enough to support significant power capacity. We can do rebuilds but not upgrades.

    Regarding your oil drain leak. Check the hose and also check engine compression. Generally that specific issue is not caused by the turbo.

    Hybrid ball bearing system is only available on RHF55 turbos. That would be your VF52. Stage 1.5 is within stock injectors and higher fuel pump capacity is not needed unless exceeding 19psi. Generally we see 3-400 RPM faster to target boost which is a significant improvement over stock.

    VF40/VF46 (RHF5H) and VF52 (RHF55) don't have anything in common except for 7 screws. Completely different bearing housing aero and bearings. We have some designs to hybridize the RHF5H frame but we are just at the beginning stages now and not sure if the project will go ahead or not.

    Our recommendation would be the Stage 1 or Stage 1.5 hybrid VF52 which will give you the most value.

    Regards,

    Jonathan
    Last edited by LunchBox04V; 03-02-2015 at 10:05 AM.
    The three most common expressions in aviation:
    "Why is it doing that?"
    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

  10. #10
    SLi Resident LunchBox04V's Avatar
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    From what I've found, the VF52 seems to spool 200-400 rpm behind the VF40. Which their hybrid ball bearing it sounds like that difference will be about zero. I think the VF52 will be the way to go for me. I'll do a little more searching on the injectors and fuel pump to make sure I'm not overloading the system.

    Living in the Midwest things get interesting with injector duty cycles at 0*F on stage 2. Haha (I can pretty easily hit 85% duty cycle).
    The three most common expressions in aviation:
    "Why is it doing that?"
    "Where are we?"
    "Oh S...!" *(The last three letters are omitted since when this expression is said, there is little chance to finish it)*

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