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Thread: From SRT forums-all the cam specs you ever needed and more!

  1. #1
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    From SRT forums-all the cam specs you ever needed and more!

    From Christian, aka DRASTIC on the SRT forums-


    SRT-4
    duration @ .050: 172/175
    Valve Lift: .327/.261
    LSA: 113

    2.0L Neon
    duration @ .050: 174/173
    Valve Lift: .347/.315
    LSA: 110 int: 108 exh: 112

    DOHC 2.4 N/A
    Duration@.006": 232/240
    LIFT: .324/.256
    LSA: 113 intake: 115 exhaust: 111

    please note, the duration is not anywhere near correct in terms of in correlation to the .050" ratings...


    Brian Crower
    Stage 2
    duration @ .050: 186/184
    Valve Lift: .350/.310


    Stage 3
    duration @ .050mm: 194/186
    Valve Lift: .389/.383


    Crower 2.4
    Stage 1
    DURATION @ .050: Int: 186°/Exh: 184°
    Valve Lift:Int:.357 / Exh:.308

    Stage 2
    DURATION @ .050: Int: 196°/Exh: 188°
    Valve Lift: Int: .385 / Exh: .382

    Crower 2.0
    stage 1
    duration @ .050: 197/197
    Valve Lift: .383/.383

    stage 2 (Nitrous cam)
    duration @ .050: 196/196
    Valve Lift: .403/.403

    Stage 2 (Forced induction Cam)
    duration @ .050: 186/184
    Valve Lift: .416/.410

    Stage 3 (street/strip cam)
    duration @ .050: 204/204
    Valve Lift: .410/.410

    Stage 3 (Race Cam)
    duration @ .050: 210/210
    Valve Lift: .420/.420


    CRANE CAMS
    10s
    duration @ 1mm: 200/200
    Valve Lift: .354/.354LSA: 110

    12s
    duration @ 1mm: 204/204
    Valve Lift: .364/.364
    LSA:112

    14s
    duration @ 1mm: 204/196
    Valve Lift: .364/.354
    LSA: 110

    16s
    duration @ 1mm: 208/208
    Valve Lift: .374/.374
    LSA: 110

    18s
    duration @ 1mm: 216/216
    Valve Lift: .394/.394
    LSA: 112


    WHICH CAMS NEED VALVE SPRINGS:
    BC 3s
    Crower 2.4: stg2s
    Crower 2.0: stg1 and up
    Crane 16's and larger

    all else are fine w/ stock springs



    VALVE SPRINGS:
    Crane Valve Springs
    Outside diameter: 1.065
    Inside diameter: 0.725
    Seat pressure: 60lbs@1.535
    Open pressure: 255lbs@1.063
    Coil bind: 0.987
    Rate: 413
    Maximum net lift: 0.472

    Brian Crower Valve Springs
    Seat Pressue: 1.500" @ 92 lbs
    Open Pressure: 1.100" @ 195 lbs
    Coil Bind: 0.920"

    Ferrea Valve Springs
    Stage 1
    S10107 Dual Spring
    Inside diameter: 20.8 mm
    Outside diameter: 28.0 mm
    Seat Pressue: 90lbs@37mm
    Open Pressure: 200lbs@27mm
    Rate Inch: 279lbs
    Coil Bind: 23mm
    Max Net Lift: 12mm

    Stage 2
    S10108 Dual Spring
    Inside diameter: 20.8 mm
    Outside diameter: 28.0 mm
    Seat Pressue: 105lbs@37mm
    Open Pressure: 235lbs@27mm
    Rate Inch: 330lbs
    Coil Bind: 23.5mm
    Max Net Lift: 12mm

    The Stage 1 and 2 spring requires Ferrea Titanium Retainer #E11074 and BOTH, Ferrea spring seat locator # SL1062 and factory supplied spring seat locator.


    SOHC Crane Springs in the DOHC head
    Outside Diameter: 1.065
    Inside Diameter: 0.725
    Seat Pressure: 85lbs@ 1.535
    Open Pressure: 244lbs@ 1.135
    Coil Bind: 1.014
    Rate: 397
    Maximum Net Lift: 0.440

    DCRValve Springs w/ Moly Retainers
    120lbs @ 1.535 @ base
    290lbs @ 1.035 @ max lift and .060 from coil bind.
    10,000 rpm tested at over 65lbs of boost!
    $300 set

    TUNING CAMS
    EXHAUST
    advancing: widens powerband
    retarding: narrows powerband

    INTAKE
    advancing: narrows powerband
    retarding: widens powerband

    MORE CAM GEAR TUNING
    ADVANCING BOTH GEARS:
    doing so will shift the entire powerband to the higher rpms. for stock/s3 turbos, this would be a good idea. w/ an already fast spooling turbo, giving up 2-300 rpms is worth the added gains to up top.

    RETARDING BOTH GEARS:
    doing so will shift the entire powerband to the lower rpms. this will result in a torquier low-midrange, but will fall off slightly up top. 50trim and up owners could benefit from shifting their powerband to the left, and gaining some midrange power where they lack it.

    HOW TO TUNE:
    the dyno is the only way.
    start off by tuning your AFR's to a solid 11.5:1 afr (many people differ on the afr, but this is a happy medium that wont set you too far lean if something happens).
    once done doing so, jump to your intake cam and start adjusting. go by 2* increments. retard your intake 2*. if you gain power, add an additional 1-2* until you see the power gains stop. if you lost power right off the bat, retard them doing the same procedure.

    once done and you like it, check your afr's once again just to assure that the afr's are in check. now start your exh cam.

    advance your exhaust cam 2*. if you gained power, add 1-2*. if you didnt, retard it 1-2* and see of the result. follow the above procedure.

    if you like how the results of both cams are, but want a tad bit faster spool, retard both cams 1* at a time.
    if its the other way around, and want the power to not drop off as much, advance both 1* at a time.



    advancing intake, retarding exhaust results in a smaller LSA; thus a torquier powerband.

    retarding intake, advancing exhaust results in a broader LSA; thus a broader, higher RPM gained powerband.


    CAM GEAR SELECTION
    UR CAM GEARS
    price is roughly 340-390. only cam gear on the market that will fit under the cover. tolerances on the dowel pin are closer than that of the fidanzas, but that should not matter if you are tuning anyways. if stealth is all worth it to you, then shell out the $$ for these.


    FIDANZA
    can be readily had from many vendors here. price goes from 170-200. all cracking issues w/ them prior have been fixed and updated a yr ago. their new updated hardware (allen keys instead of hex) are made to supposedly clear the side mount. too close for comfort...save yourself the headache, and shave the mount. oh, and upgrade your hardware, theyre junk

    AEM 2.0's + JEFFB#2 spacers
    these are my favorite. can be had from 125-200 used/new from the 2.0 neon guys. all youll need to do is get ahold of the JEFFB#2 spacers and youre golden.
    super easy to tune w/ only 3hex bolts vs. the standard 5allen keys. it saves muchhhh time when on the dyno.

    VALVES
    REV (+1mm int, +1mm exh as well as +2mm)
    SI (+1mmint/exh). go roughly for 12.50/valve
    DCR +1 avail and +2mm for exh

    larger valves help contribute to a little faster spool, and more power to be made at less boost.




    i will be adding more throughout time as i find necessary.
    this section hasnt had a thorough, and solid info thread w/ correct info in yrs practically.
    im trying to get mod status for this section, since alot of stuff needs to be stickied and updated. so if you found this thread helpful, shoot ekool or castrol of the sorts a pm, and let them know. id appreciate it.


    christian

    __________________
    CHRISTIAN.
    custom 47lb AGP setup.
    413hp, 446tq 91pump!
    Crower S2's, ported int/exh on the head, 70mm TB, and fresh stock rebuild added.
    420-430hp on 91pump or bust!
    Last edited by turbovanmanČ; 01-22-2008 at 05:45 PM.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  2. #2

    Re: From SRT forums-all the cam specs you ever needed and more!

    thanks for the info. great stuff.

  3. #3
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Thanks to Christian, he let me post it.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  4. #4
    turbo addict
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    Re: From SRT forums-all the cam specs you ever needed and more!

    good stuff.

  5. #5
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Nice info for the KC

    JT
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  6. #6
    turbo addict
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Some of the info is wrong. Like advancing both cams gives more top end power. The result is more bottom end and less top end. I have confirmed this on a dyno with a 2.4 DOHC. There may be other wrong info as well. I just breased through the post.

  7. #7
    Hybrid booster 87csx2.4's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Quote Originally Posted by glhs875 View Post
    Some of the info is wrong. Like advancing both cams gives more top end power. The result is more bottom end and less top end. I have confirmed this on a dyno with a 2.4 DOHC. There may be other wrong info as well. I just breased through the post.
    Yeah they've got these two backwards.
    ADVANCING BOTH GEARS:
    doing so will shift the entire powerband to the higher rpms. for stock/s3 turbos, this would be a good idea. w/ an already fast spooling turbo, giving up 2-300 rpms is worth the added gains to up top.

    RETARDING BOTH GEARS:
    doing so will shift the entire powerband to the lower rpms. this will result in a torquier low-midrange, but will fall off slightly up top. 50trim and up owners could benefit from shifting their powerband to the left, and gaining some midrange power where they lack it.

  8. #8
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Thanks, we can alter that. Either way, good info.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  9. #9
    Mitsu booster
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Interesting, all this time i thought the SRT cams were the same as NA 2.4 cams. At least crane cams shows stock cams specs as the same between the NA PT and SRT cams.

    The older ones might be different.

  10. #10
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    Finally made this and other notes I had into a KC article!

    http://www.turbo-mopar.com/forums/vb...&articleid=138

    JT
    SDAC Director
    SDAC-Chicago President
    JOIN SDAC and your local Chapter TODAY! - SUPPORT the CLUB that supports YOUR HOBBY!
    87 Shelby Z - 10.50@141.66mph
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    Check out Turbo-Mopar Times!
    Submit your 1/4 mile times HERE!!

    Support SDAC! Join Today!
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    Note: The information and any images provided in this post are not for distribution outside this forum without the author's permission.

  11. #11
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    About time, what took you so long, hehehe!
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  12. #12
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: From SRT forums-all the cam specs you ever needed and more!

    was waiting for you to do it.. i know how you like to write KC articles, LOL

    Actully.. I'm shopping for cams and needed the info, LOL!

    JT
    SDAC Director
    SDAC-Chicago President
    JOIN SDAC and your local Chapter TODAY! - SUPPORT the CLUB that supports YOUR HOBBY!
    87 Shelby Z - 10.50@141.66mph
    87 CSX #751 Clone - 12.88@102.88mph

    www.badassperformance.com
    Check out Turbo-Mopar Times!
    Submit your 1/4 mile times HERE!!

    Support SDAC! Join Today!
    "I'm not some pro athlete with a bajillion dollars, I'm just an every man"
    Note: The information and any images provided in this post are not for distribution outside this forum without the author's permission.

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