comp cams Xtreme Energy 294H (12-254-3)

Discussion in 'High Performance Modifications' started by lazr_guira, Oct 26, 2009.

  1. lazr_guira

    lazr_guira Veteran Member

    199
    0
    Feb 9, 2009
    IL
    Hi all. I'm new to this forum and have a few questions. Is any body running a a comp cams 294H (12-254-3) ? I bought one and i think the cam maybe a little to big for my application now. Its not like i didn't take the time to reserch the cam a little. even on the comp cams website thier dyno sheet is almost 100% the same as mine exept for the 1 3/4 headers. Mine are have 1 5/8. http://www.compcams.com/technical/DynoSheets/XE294H-10_001.asp I feel like my setup is making more like 325HP not even close to what it should be. what did i do wrong?

    any way i was expecting my 1980 camaro to run low to mid 12's and the best i got was 13.14 @103 mph.

    here is my setup
    WORLD PRODUCTS FULLY PORTED SPORTMAN II
    MANLEY SERVERE DUTY VALVES 2.02 X 1.6 (STOCK LENGTH)
    VICTOR JR (FULLY PORTED)
    MAGNUM 1.6 ROLLER ROCKERS
    STOCK BOTTOM END WITH 9:1 TO 9:5 COMPRESSION
    HOLLEY 750 DOMINATER (MAYBE A LITTLE TO BIG)
    COMP CAMS 294H (12-254-3)
    TURBO 400 W/TRANS BRAKE
    B&M HOLE SHOT 3000 ( LEAVING AT 3400 ON THE BRAKE) I know wrong converter for a brake.
    4:10 gears
    28" MICKY DRAG RADIALS
    CALTRACS
    MSD 6AL-2 W/ PRO BILLET DIST.

    car wieghs 3690 with me in it and 3450 empty. any help or advise will be greatly appeciated. Thanks :)
     
    Last edited: Oct 26, 2009
  2. badazz81z28

    badazz81z28 Veteran Member

    13,263
    49
    May 4, 2001
    Las Vegas, NV

    That seems about right IMHO....gross 325hp is not going to get you in the low 13s in a 1980 Camaro.
     
  3. lazr_guira

    lazr_guira Veteran Member

    199
    0
    Feb 9, 2009
    IL
    Really ???? not acording to these calculators.

    http://golenengineservice.com/html/calculators.html

    I know i can hit the twleves with this setup. i'm going to change a few things and see if it helps

    1) i'm going to put and RPM PERFORMER intake on it W/the center divider milled out like the RPM AIRGAP to see if i can gain some low end torque.

    check this out http://www.youtube.com/watch?v=N_ART4SBmdg

    2) i just bought a set of full 1.5 roller rockers rather than the 1.6 magnum roller tips

    3) just ordered a 4000 stall

    took my trans in to get freshend up and found oud my pump was bad.
     
  4. badazz81z28

    badazz81z28 Veteran Member

    13,263
    49
    May 4, 2001
    Las Vegas, NV

    My 81Z had about 365hp 360ci with 3.73 gears and wouldnt run any quicker than 14.5. Sometimes 15s!
     
  5. -=79z28=-

    -=79z28=- Veteran Member Lifetime Gold Member

    1,344
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    Jan 22, 2008
    Charlotte, NC
    at a quick glance, i can tell you that your compression is way too low for that cam, it should be up to about 11:1.
     
  6. lazr_guira

    lazr_guira Veteran Member

    199
    0
    Feb 9, 2009
    IL
    Yea i know. it is a pretty low. i kinda took a chance. especially when i saw their dyno sheet. I wanted a very mean sounding machine. That .250 in/ .256 exh duration at .050 definitely sounds mean but unfortunately, its not the recipe for HP. I should have went a cam that has about .238-.246 duration at .050 or more compression of course. but any how its a little too late. any ideas on how i can get this cam to run better with this setup? are the changes i'm doing going to be better or worse?
     
  7. lazr_guira

    lazr_guira Veteran Member

    199
    0
    Feb 9, 2009
    IL
    oh and im going to try and go with a regular 4150 holley 750 rather than that monster 750 dominator that i'm running. i dont have the hp or cubes to make that carb happy yet. My motor is probly just tickling it. I'll just put it away til i get my 406 built.
     
  8. DesmoEd

    DesmoEd Veteran Member

    1,119
    1
    Sep 9, 2009
    Frisco, TX

    raise static CR and you raise dynamic CR

    block undecked? what head gaskets?
     
  9. lazr_guira

    lazr_guira Veteran Member

    199
    0
    Feb 9, 2009
    IL
    well don't think the block was decked. but it was pretty smooth. im using some felpro 1094's .015 compressed. so i think i might have about 9:5:1 now.
     
  10. Mwilson

    Mwilson Veteran Member

    that combo should be doing mid 12's easy, hows the timing initial & total? What are you shifting at?
     

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