Yet another Cam question.

Discussion in '1994 - 1995 Specific Tech' started by XxFaceYourFear, Sep 13, 2007.

  1. I have a 95 cobra and recently, I have gotten a hold of a Lunati cam and was wondering how this will perform with the stock gt 40 heads that are currently on my car. Everything is pretty much stock, and if it works, how would it perform with the heads decked .030" or .060"? Would gt 40P heads work better? Would it be drivable with the stock tune and raised idle until I got a chip burnt? What other, if any, problems would I run into, i.e heating issues, piston to valve clearance w/stock pusrods/1.7 roller rockers or the like? Thanks for the help in advance.

    Lunati Cam specs from summit

    Brand: Lunati

    Product Line: Lunati Hydraulic Roller Tappet Camshafts

    Part Type: Camshafts

    Cam Style: Hydraulic roller tappet

    Basic Operating RPM Range: 3,000-6,800

    Intake Duration at 050 inch Lift: 242

    Exhaust Duration at 050 inch Lift: 252

    Duration at 050 inch Lift: 242 int./252 exh.

    Advertised Intake Duration: 300

    Advertised Exhaust Duration: 310

    Advertised Duration: 300 int./310 exh.

    Intake Valve Lift with Factory Rocker Arm Ratio: 0.560 in.

    Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.576 in.

    Valve Lift with Factory Rocker Arm Ratio: 0.560 int./0.576 exh. lift

    Lobe Separation (degrees): 110

    Intake Valve Lash: 0.000 in.

    Exhaust Valve Lash: 0.000 in.

    Computer Controlled Compatible: No

    Grind Number: RRN1-242-252

    Quantity: Sold individually.

    Camshaft, Hydraulic Roller Tappet, Advertised Duration 300/310, Lift .560/.576, Ford, Small Block, Each
  2. Decking/Milling the heads increases compression, which in-turn also creates less piston to valve clearance between your valves and the stock pistons.

    I can see that cam having trouble with clearing the stock pistons.

    I also see a lower LSA, which can cause some driveability issues with the 94/95 ECU.

    I also see a cam with a powerband that does not match your head, intake, or supporting parts flow potential.

    I think you would be dissapointed in it's performance at this point.

    Good Luck!
  3. that is a very agressive cam ... you would probably have a hard time getting it to idle without a custom tune.

    what is the max lift those heads and springs can support?
  4. Im not sure what the max lift the heads can handle, I looked for some numbers but found nothing. As for the springs, I was intending to swap them out for the lunati recommended springs to get the correct spring intensity.
  5. That's a pretty big cam. It would be better suited for a big stroker. It will kill the low end in an otherwise mild 302.
  6. agree^^^^ piston to valve problems X2***