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Thread: twin turbo 415 sbc timing

  1. #1
    bonedaddy Guest

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    sorry wrong place to post

  2. #2
    msdtech1955 Guest

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    what was it you were looking for ?

  3. #3
    bonedaddy Guest

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    timing for a twin turbo sbc starting line and finish line just some place to start

  4. #4
    msdtech1955 Guest

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    whats your combo?

  5. #5
    bonedaddy Guest

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    Quote Originally Posted by msdtech1955 View Post
    whats your combo?
    415 sbc/ brodix track1 heads/all forged /blow through csu carb/twin 67mm turbos/ATI turbo3speed with a brake 4000 stall./9in 3.50 gear on a spool/comp everything 645/645 lift with 249/249 dur at 50 on a 115. hdy roller.good to 7200./ 3600 lbs on a 275 tire /msd 7562 boost controler and a 7535 with boost retard some help on using the 2 controller at the same time would be nice i have co2 to control the top of the wastegate as you sugested in post .all the help i can get would be great right now i have the 2 lite blue wired to my roll control and the dark blue on both on the trans brake HELP!!!!

  6. #6
    msdtech1955 Guest

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    is this gas or alcohol...?

    on the boost controller ...is it plumbed like this ?
    http://www.msdignition.com/forum/showthread.php?t=16933

    what boost are we looking at ?
    co-2 pressure ?
    launch rpm ?

    basically....tell me what you have done so far ..the more info you give me...the better we can help you on the timing and the boost controller curve!

  7. #7
    bonedaddy Guest

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    waste gate is set up like duel waste gate 1 jpg

    compression is 8.98.1
    20 psi boost for now
    gas 110 and water/meth injection.
    2 precision 46mm wastegates
    i am looking to launch at 4000 10in converter

    ok now the rest of the story this is a new motor and all new setup for me !!

    the old motor stock block stroker 396 same carb blow through 2 60-1 turbos
    made 870 to the rear wheels on a dyno at 18 psi
    2 evalation waste gates ran on 10lb springs only no controler locked down timing at 28 a dig 6 msd box msd coil msd billit dis.
    no trans brake foot brake
    it was sad 10.0 at 145 1/4 mile
    so all this setup is new to me that is why i am being a PIA
    all this new stuff its hard to know were to start !!!!!! just so you know i am not some young guy talking crap old guy working on bucket list LOL low 9s

  8. #8
    msdtech1955 Guest

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    are you running the 75psig racepak sensor or the three bar map sensor?
    also, are you monitoring pressure at the manifold or waster gate?

  9. #9
    bonedaddy Guest

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    map sensor 23121 on both boxes .this part is good to 30 psi ? i dont plain on going over 20 psi at this time . and at the manifold.

  10. #10
    msdtech21 Guest

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    Try pulling a total of 10* of boost retard using the 7535. Set the boost controller with 60 psi of CO2 on top of the gate. Start with P= 30 I= 15 D= 0. Plot your boost curve and let that dog eat.

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