Cam...... Question...

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    Offline wally426ci

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    Cam...... Question...
    « on: September 06, 2008 - 04:39:31 PM »
    So, Im on my 2nd shaft. The first was ok, but i had some lifter noise and i decided to switch it all out at once instead of just lifters. So, Ive found that ever since i switched in the other cam, a Comp, Its a bit too radical for my taste. I like to cruise, and take off at a few Redlights....  :burnout: But I simply dont enjoy driving it with such a cam in it.

    My question is: at the current timing 34* its sort of tries to jump at the light a little. Sort of giving me the sense that it would need a higher stall. Im running a 2800rpm right now. I am not changing the torque converter for this lumpy cam. So, does anyone think i could get rid of this problem with more timing experimentation? or is it simply a cam/converter deal?  :feedback:

    I'll post my cam specs this week if anyone wants to know.....  :working:
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    Offline 422STROKER

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    Re: Cam...... Question...
    « Reply #1 on: September 06, 2008 - 07:33:13 PM »
    I'd like to see the specs, and a 2800 stall is pretty good too.

    I'm running a 302 Crane in my stroker and it does not push at all with a 2500 stall.

    Tom
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    Tom
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    Offline wally426ci

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    Re: Cam...... Question...
    « Reply #2 on: September 06, 2008 - 08:04:17 PM »
    Cool. Im at the beach during the Tropical Storm right now, so when i get back I'll be sure and post specs.  :chatting:
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    Offline wally426ci

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    Re: Cam...... Question...
    « Reply #3 on: September 07, 2008 - 09:08:35 AM »
    I just thought of something last night. I wonder if my RPM's are too high @ idle. I think im around 1100-1200? so, maybe thats why it starts to want to move. Maybe i need to adjust initial timing..... and make it run better at that point..  :working:
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    Offline oldkimmer

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    Re: Cam...... Question...
    « Reply #4 on: September 07, 2008 - 09:14:49 AM »
     :canada:...........U may want to do a timing curve with just the mechanical advance first, then vac advance, see where that takes u.......probably have to shorten the slots in the dist...U should b able to idle 850-900 depending on ur cam specs.....kim.........
    « Last Edit: September 07, 2008 - 09:16:24 AM by oldkimmer »
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    Offline wally426ci

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    Re: Cam...... Question...
    « Reply #5 on: September 07, 2008 - 09:28:08 AM »
    Yeah, Ive had the Vac disconnected so far since i got the car running again. Im gonna tinker with it maybe next weekend or something....  :thinkerg:
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    Offline 422STROKER

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    Re: Cam...... Question...
    « Reply #6 on: September 07, 2008 - 09:30:57 AM »
    I got mine idling at 780 in park and 690 in gear.  After you adjust the timing you'll need to lower the curb idle screw and then adjust the idle mixture as previously discussed.  Then check the timing again.

    Tom :bigsmile:
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    Offline wally426ci

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    Re: Cam...... Question...
    « Reply #7 on: September 08, 2008 - 07:39:31 PM »
    Previously discussed... why I outa  :poopoke:
    Ok here goes:

    Gross Lift =        In: 0.488 Ex: 0.491

    Duration @ .006 =      274        286

    valve timing        Open       Close
    @ .006              In: 31   BTDC: 63
                           Ex: 77   BBDC: 29

    Installed:
    @ 106.0 Intake Center Line
    Duration @ 0.050
            In: 230   Ex: 236
    Lobe lift: .3250      .3270
    Lobe seperation 110.0 

     :chatting: 

    Im pretty sure only the .050 numbers matter but i thought id throw everything in
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    Offline Supercuda

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    Re: Cam...... Question...
    « Reply #8 on: September 08, 2008 - 08:00:39 PM »
    All the numbers matter. The .050" lift numbers help us gauge how rowdy the camshaft really is, and the comparison between different cam grinds is really only valid using the .050" numbers, and the lift at the valve. The gross duration numbers (here expressed as .006" lift duration) help us determine how aggressive the acceleration and deceleration ramps are on the lobes. Your cam is pretty mellow, and should make good power, with a strong bottom-end. The carb and ignition timing need checking. The mixture and speed screws need to be checked and adjusted, and initial timing needs to be confirmed as being in the right place for your engine. This setup would start at 12 degrees BTDC, if I were tuning it, and I would play with the timing from there. This really sounds like some tuning will clear it up.
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    Offline sprecks

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    Re: Cam...... Question...
    « Reply #9 on: September 08, 2008 - 08:24:52 PM »
     :iagree:with SuperCuda. This has got to be a tuning issue. That cam shouldn't be a problem on the street. Especially with a 2800 stall converter. Get it tuned up good and it will be fine.
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    Offline 422STROKER

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    Re: Cam...... Question...
    « Reply #10 on: September 08, 2008 - 08:43:01 PM »
    Wally that is pretty small( :poopoke:) but seriously in your stroker engine that thing is a baby.  Get your vacuum guage out and your new timing light and have at it.  Don't forget the screw driver for the carb too.  Oh and that distributor wrench you bought too.

    Tom :smilielol:

    This is my cam, I have under 10 to 1 compression, not sure what yours is though.  You CAN get it to work with some patience. :woo:

    Camshaft Specification Card  BACK TO LIST     
    Part Number: 694561 Grind Number: H-302-2 (REPLACES CCH-302-2)
    Engine Identification:     
    Start Yr. End Yr. Make Cyl Description
    1964 Up PLYMOUTH-DODGE-CHRYSLER 8 ROUGH IDLE, PERFORMANCE USAGE, GOOD MID-RANGE HP, AUTO TRANS. W/ 3000+ CONVERTER, 10.0 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500
    Engine Size Configuration   
    273-360 C.I. V   
     
    Valve Setting: Intake .000 Exhaust .000 HOT
     
    Lift: Intake @Cam 3360 @Valve 504 All Lifts are based
    on zero lash and theoretical rocker arm ratios.
      Exhaust @ Cam 3520 @Valve 528
    Rocker Arm Ratio 1.5     
     
    Cam Timing: TAPPET @.0044
    Lift:   Opens Closes ADV Duration
      Intake 37 BTDC 85 ABDC 302 °
      Exhaust 90 BBDC 42 ATDC 312 °
     
    Spring Requirements:   Triple   Dual   Outer   Inner
    Part Number 99838
    Loads Closed 112 LBS @ 1.650 or 1 21/32
      Open 313 LBS @ 1.150     
     Recommended RPM range with matching components
    Minimum RPM 3200
    Maximum RPM 6800
    Valve Float 7200
     
    Cam Timing: TAPPET @.050
    Lift:   Opens Closes Max Lift Duration
      Intake 7 BTDC 45 ABDC 109 232 °
      Exhaust 60 BBDC 2 ATDC 119 242 °
     
    Remarks:
     
     

    Crane Cams continuously improves and upgrades its cam designs. In some cases this may mean that two Crane Cams with the same part number may actually be different grinds. You must check the GRIND NUMBER stamped on the front of the camshaft and check it against the Grind Number near the top of the Spec Card. For more information on the finest available camshafts, valve train components, and automotive ignition products, visit your local Crane dealer or call the Crane Cams tech line at (386) 258-6174 or FAX (386) 258-6167
     
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    Tom
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    Offline 71chally416

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    Re: Cam...... Question...
    « Reply #11 on: September 08, 2008 - 10:04:47 PM »
    I agree that's hardly a radical cam for a stroker big block.  :grinno:
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    Offline moper

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    Re: Cam...... Question...
    « Reply #12 on: September 09, 2008 - 11:39:38 AM »
    Toms cam is mild for a 4" arm. Wally's cam is a towing/RV cam for that stroke. Wally, that thing should idle at 600rpm cleanly in gear, and 650-700 in park. I dont know who has been helping you if anyone, but in terms of packages, you have the equivolent of a 318 2bbl with a stock cam there. Not in terms of total output, but in terms of parts matching. An average "low and midrange" cam for a 4" stroke engine is 245°@.050, and really, if you want to make bigger power, you better have at least 255-260°@.050. You have to disregard tha catalog recommendations. Look at Toms cam card. That cam is listed as a mid to wild choice for a 340/360 package. Yet in a 4" arm engine, with decent ports, it's a fairly mild cam. I think you just need some tuning knowledge or help, and it wil be fine. It will run out of steam at a fairly mild rpm, but it will run well.
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    Offline wally426ci

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    Re: Cam...... Question...
    « Reply #13 on: September 09, 2008 - 12:17:14 PM »
    Thanks for the input guys. I'll do some tuning. I just assumed it was radical since it has a bumpy @ss idle. So, I'll do some investigating..... I'll have to dig up the cam card from the Racer Brown cam I was running and see what everyone thinks about that one.....  :thumbsup:

    Im down for more power, I wanna  :burnout: But i like something that is good for cruising. Sounds like Ive got a cruising cam, just need to  :working:

    I also never degree'd it in, its just sitting in the stock position @ TDC, if that matters. I really hate the racing timing chain sets with like 10 different gear settings. I had to hold it up to a stock one to get it right....  :chatting:
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