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Thread: BadAss SRT-Z - 2.4L / A568 - Update!!!

  1. #101
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Cool, are they the same shape, just no letters? I would prefer the same shape...

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  2. #102
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by BadAssPerformance View Post
    Cool, are they the same shape, just no letters? I would prefer the same shape...

    I think it's the same shape, black and lumpy, just how you like it.
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  3. #103
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    MMmmmm lumpy

    JT
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  4. #104
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!



    if you havent seen this... SRT-4 base timing map that is supplied with AEM systems.

    btw, that is total timing, no base advance

    Brian

    Quote Originally Posted by turbovanman
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  5. #105
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    What CR do you have JT?

  6. #106
    turbo addict Turbo Mopar Contributor Dave's Avatar
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Wow JT. That looks amazing! I'm always blown away by your work.

    I don't know if it's been asked yet, but what are you using for electronics??

  7. #107
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by Aries_Turbo View Post


    if you havent seen this... SRT-4 base timing map that is supplied with AEM systems.

    btw, that is total timing, no base advance

    Brian
    Holy timing Batman!

    Thanks Brian

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  8. #108
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by Speedeuphoria View Post
    What CR do you have JT?
    IIR it is 8.5:1

    Quote Originally Posted by Dave View Post
    Wow JT. That looks amazing! I'm always blown away by your work.

    I don't know if it's been asked yet, but what are you using for electronics??
    Thanks see below...

    Quote Originally Posted by BadAssPerformance View Post
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  9. #109
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Is that pump gas timing?

  10. #110
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    yes thats the factory pump gas timing for the SRT4, as stated earlier in this thread thats why people have probs when switching to a larger turbo, lots of timing, breaks the oil pump gears from detonation and cracks the ringlands.

    I think the stock ramp style pistons like more timing then dished pistons from what I understand, so when they switch to a higher CR piston and dished quench design they have major probs if not done properly. Thats why on SRTforums I allways suggest running the lowest CR possible. IMO there is not a good off the shelf piston for the SRT4 motor(using a stockish computer) because they are either stock ramp style( which I dont care for) or dished raising the CR, the 8.5CR JE's are the lowest common dished piston and dont have large enough valve reliefs for larger than Crane 14 cams.

    Someone needs to get there act together and make a damn piston w/ like 8.3CR/dished and large enough valve pockets.

    Then again I'm running ~9:1CR, but have the timing very low in comparrison(almost 1/2 the stock SRT4, hint JT )

  11. #111
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Yeah, there's no way I'm going close to those stock numbers

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  12. #112
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    What are the numbers on the left side of the scale?
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  13. #113
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by Speedeuphoria View Post
    Then again I'm running ~9:1CR, but have the timing very low in comparrison(almost 1/2 the stock SRT4, hint JT )
    you run 10* at max on redline?

  14. #114
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by contraption22 View Post
    What are the numbers on the left side of the scale?
    MPa I would guess.

    JT
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  15. #115
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by BadAssPerformance View Post
    MPa I would guess.
    Kpa... i have another image that i converted to psi, lemme see if i can find it.

    here it is. i think those are the correct values.



    Brian

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

  16. #116
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by t3rse View Post
    you run 10* at max on redline?
    at that psi yep, but I dont go that high of boost on 93octane pump gas because EGT's get to 1700. Thats why I have 10gph of 100%meth which brings the EGT's down at least 100deg so I can run a little over 20psi w/ more timing
    Last edited by Speedeuphoria; 11-18-2007 at 11:03 PM.

  17. #117
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by Aries_Turbo View Post
    Kpa...
    Doh!

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  18. #118

    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    I am still confused by you guys that are at 10-15* timing at WOT. Weak stuff man.

    On the SRT4 stuff, a bunch of them run AFC's or other hack devices that make the pcm think they're at lower boost levels so it doesn't dump so much Effing fuel, because they run them very, very rich. Except then they run rediculous timing.... way rediculous.

  19. #119
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    aaron, so are you saying that the map posted is way too aggressive?

    do you have the resources/experience to suggest some better timing values and edit them into the pic?

    I am helping a friend tune a 2.4L swap in a 97 eclipse sometime within the next year and id like to start with a somewhat safe base map as he and i still need to work on a good knock detection setup. he is running megasquirt II. plus I think that we all could benefit from this.

    thanks

    Brian

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

  20. #120
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    Re: BadAss SRT-Z - 2.4L / A555 - It's ALIVE!!!

    Quote Originally Posted by 8valves View Post
    I am still confused by you guys that are at 10-15* timing at WOT. Weak stuff man.
    Its no 8valve

    My vac and 100Kpa values are basically the same as that map(basically 2 deg less except for idle)

    This was posted by Kevin Davis on TD awhile ago

    "Yes he is talking total timing,I talked with bill hahn and some other people darrel cox etc. about total timing with the pent roof stlye head when I was building my 2.4 dohc.This is what bill hahn told me,@ 8.6:1 comp. with the sc6152 turbo 15 psi is max with pump gas @ 15 to 17 total if you go to 21 psi 110 octane, 26 psi 114 anything else c16. I found that with the automatic its more like 13 or 14 I was getting slight knock at 15 degrees.Like brian said the pent roof style head is so efficient and such a fast burn head with its central plug location it just doesnt need the advance.Darrel cox said @30 psi with c16 keep it between 9-12 total if you need more power raise boost dont increase timing he was bending aluminum rods.Usually the first thing to break on the 2.4 with serious detonation is the oil pump then it just escalates from there.Sorry not trying to hijack thread but thought this would be some good info for the dohc guys"

    Also heres a good formula for dynamic compression ratio
    the formula is: (actual boost/14.7)+1 xCR).
    so right now I'm running(15/14.7)+1x9.0), which =~18.2:1cr
    Last edited by Speedeuphoria; 11-18-2007 at 11:22 PM.

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