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  1. #26
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    That's still very impressive spool for a Garrett 3586 GTX. 3rd gear and an engine dyno aren't doing it any favors!

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    2 out of 2 members liked this post. Yes Reputation No
    Sticky: This testing was done on my 135I.

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    Click here to enlarge Originally Posted by dperf Click here to enlarge
    Sticky: This testing was done on my 135I.
    That explains that. Well done. I'm sure you are very happy.

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    Holy hell. This is great. Imagine that head on the car that just put 753 to the wheels...

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    Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
    Holy hell. This is great. Imagine that head on the car that just put 753 to the wheels...
    With that head on the car he may have put 753 to the wheels...Click here to enlarge
    Last edited by Tony@VargasTurboTech; 05-20-2014 at 04:44 PM.

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    I wonder how well it would do with a set of the vargas twins. There'd be some amazing flow increase over stock.

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    Click here to enlarge Originally Posted by dperf Click here to enlarge
    -Before dyno graph was pulled to 6750 ish rpms simply because the stock head doesnt make much more power above that
    -peak WHP difference was 553 before vs 603 after
    I'm still confused as to why it wasn't done apples-to-apples?

    it may not have made MUCH more power, but the line is clearly still heading up rather than down, and would make it easier to compare? This shows 50BHP gain, but if the 'before' was wound out, it may have been 40-45?

    still, congrats! The gains are obviously there, and the higher the boost, the less the restriction, the greater the horsepower gap.. damn near 10% gain there (7-9.5% or so). - plans to turn the boost up? Click here to enlarge.. no reason to have only 600BHP on a GTX35.

    this head on @aflatau 's would have to take it over 800! hah

    ouch at the $4k price tag though, big shame that + shipping costs there and back make it totally infeasible for me hah.
    boop

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    Great numbers!
    2010 e92 M3 Jet Black | DCT | ESS Tuned | Akrapovic Slip-on | Challenge X-pipe | AFE Intake | 18" Volk TE37SL | KW V3 Coilovers | RPI Scoops | Under Drive Pulley

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  9. #34
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    Click here to enlarge Originally Posted by dperf Click here to enlarge
    Sticky: This testing was done on my 135I.
    Nice setup man. Single turbo GTX3586, twin scroll top mount? Would really like more info on your whole setup. You should make a thread here with pics videos all that good stuff.
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  10. #35
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    Click here to enlarge Originally Posted by V8Bait Click here to enlarge
    Exactly. Boost is a dumb measurement airflow is what matters. Is there any flowbench numbers?
    Well airflow and a sheet load of properly burned fuel Click here to enlarge
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    Click here to enlarge



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    Click here to enlarge Originally Posted by 135idct Click here to enlarge
    why just don't port the stock head? 4k $ is a lot
    Ditto, $4k for port and valves plus core is very high.

    The gains look good.
    Change is constant

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    Congrats to vac and the owner of the test car! Had a little off question. With oem turbo upgrades costing what they do, is this maybe a alternative for a a little amount of power compared to singles? Just thought that if big single or twins were eventually in your plans, doing the head job might work temporarily.

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    Click here to enlarge Originally Posted by blackshan Click here to enlarge
    Congrats to vac and the owner of the test car! Had a little off question. With oem turbo upgrades costing what they do, is this maybe a alternative for a a little amount of power compared to singles? Just thought that if big single or twins were eventually in your plans, doing the head job might work temporarily.
    It's an alternative in the sense that you won't have to push the stock twins as hard to make the same or more power.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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  14. #39
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    Thanks sticky! Would love a built up head with some reliable power while I decide on a turbo kit. Still would seem crazy having that setup with stock turbos while waiting on turbo kits that begin production this year. I know labor for this is crazy. Decisions smh!

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    There's no such thing as a GTX3586. It's a GTX3582r if it's a Garrett turbo. If it's a 3586 it's an FP HTA3586r. Kind of a big deal as far as spool is concerned as the HTA86 spools about 300rpms later but makes almost 100more hp than the GTX3582r.

    Did id I miss where VAC posted what the rev limit of the stage 3 head will be?
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    Click here to enlarge Originally Posted by bigdnno98 Click here to enlarge
    Did id I miss where VAC posted what the rev limit of the stage 3 head will be?
    It's dependent on the valvetrain and fuel system isn't it?

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    Click here to enlarge Originally Posted by blackshan Click here to enlarge
    Congrats to vac and the owner of the test car! Had a little off question. With oem turbo upgrades costing what they do, is this maybe a alternative for a a little amount of power compared to singles? Just thought that if big single or twins were eventually in your plans, doing the head job might work temporarily.
    would be cool to see on RB's/stage 2's.. the stock turbos love every little bit of efficiency you can give them, so even if it only sees the same % gains, 7% gets it dangerously close to 600rwhp on a kill tune.
    boop

  18. #43
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    It's dependent on the valvetrain and fuel system isn't it?
    stage 3 head has ferrea springs/tit retainers/new valves.
    boop

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    Click here to enlarge Originally Posted by Flinchy Click here to enlarge
    stage 3 head has ferrea springs/tit retainers/new valves.
    In that case it will be good for more revs than the fuel system or cams can handle.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    In that case it will be good for more revs than the fuel system or cams can handle.
    lol so that's where VAC and Vargas come in
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    Click here to enlarge Originally Posted by The Ghost Click here to enlarge
    Ditto, $4k for port and valves plus core is very high.
    Very high in relation to what? Most people send us their cores for cylinder head work. We offer more than just 'port and valves':


    • Complete Disassembly & Cleaning
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    • Our Superior Max Performance Multi-angle Intake, Radius Exhaust Valve Job Using Serdi Equipment
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    • Meticulous full Port and Polish Work to enhance all performance characteristics
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  22. #47
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    Click here to enlarge Originally Posted by blackshan Click here to enlarge
    Congrats to vac and the owner of the test car! Had a little off question. With oem turbo upgrades costing what they do, is this maybe a alternative for a a little amount of power compared to singles? Just thought that if big single or twins were eventually in your plans, doing the head job might work temporarily.
    The cost of the cylinder head work is one thing...the other is the labor. If you are paying someone to do a head it really gets expensive. Most of our clients do ported/built heads when they hit that 'all in' stage.

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    Click here to enlarge Originally Posted by Mike@VAC Click here to enlarge
    The cost of the cylinder head work is one thing...the other is the labor. If you are paying someone to do a head it really gets expensive. Most of our clients do ported/built heads when they hit that 'all in' stage.
    Yeah at that point I'm sure it becomes a battle between just doing what you originally set out to do and what makes since to do once and not twice.

  24. #49
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    Playing with cars is expensive if you want quality work. If you want top notch cylinder head work, it's money.

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    Ok so back to my question. With upgraded valve train what's the new rev limit? I'm hoping one would be able to get 8k rpms out of a built n54 head.
    2011 335is DCT, JB4 + MHD BEF, stage 2 LPFP, e50 + 50/50 meth, FBO, MT ET Streets when needed


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