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Thread: Cam Upgrade.

  1. #1
    Join Date
    Dec 2006
    Location
    Florida, Orlando
    Posts
    489

    Default Cam Upgrade.

    Ok i've been looking at this for about 3yrs know. Im about to do a cam and head swap on my 96 SS impala. So I figured why not do a cam swap with the cam Walt sells on the site. I want to know if this cam will actually give me a boost in performance or if its just a gimmick. Also will I have to get a custom tune with this set up which will problably have to happen anyway?
    1995 chevy c1500, 6.5LTD 2wd, PMD relocator, SS Diesel Supply 4 inch exhuast, FS2500 Oil Bypass, & S&B Air Intake.

  2. #2
    Join Date
    Feb 2007
    Location
    Baja California Sur Mexico
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    2,806

    Default

    Is the Impala a diesel?
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  3. #3
    Join Date
    Dec 2006
    Location
    Florida, Orlando
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    Default

    Quote Originally Posted by grancito View Post
    Is the Impala a diesel?
    My bad I meant to say that I'm planning a cam and head swap for my SS. So I was wondering to myself "hey walt sells a custom cam for the 6.5L so why not also do a cam swap to my 6.5L while I'm at it".
    1995 chevy c1500, 6.5LTD 2wd, PMD relocator, SS Diesel Supply 4 inch exhuast, FS2500 Oil Bypass, & S&B Air Intake.

  4. #4
    Join Date
    Feb 2007
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    Baja California Sur Mexico
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    Default

    cams for a non turbo gas engine make a big difference in performance, but for a turbo diesel, the cam design does not make much difference. More boost and fuel does.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  5. #5
    Join Date
    Dec 2006
    Location
    Florida, Orlando
    Posts
    489

    Default

    Quote Originally Posted by grancito View Post
    cams for a non turbo gas engine make a big difference in performance, but for a turbo diesel, the cam design does not make much difference. More boost and fuel does.
    Gotcha. Also would the fluidamper still be a good buy or just stick with my stock damper.
    Last edited by grvrjr; 12-28-2011 at 03:09 PM. Reason: Mis spelled and phrased question wrong.
    1995 chevy c1500, 6.5LTD 2wd, PMD relocator, SS Diesel Supply 4 inch exhuast, FS2500 Oil Bypass, & S&B Air Intake.

  6. #6
    Join Date
    Feb 2007
    Location
    Baja California Sur Mexico
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    Default

    If it isn't broken, don't fix it. If it is, look at the price difference and will a stock one last the life of the truck.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  7. #7
    Join Date
    Nov 2010
    Location
    Nashville
    Posts
    54

    Default

    Grancito I really respect your opinion, I will add that I just replaced both my main dampener and the pulley dampener. At my vehicle age I was concerned about the rubber deterioration. I spent the bucks for the Fluiddamper. I bought the pulley dampener at local parts house and took it back after I compared the fit and finish with a factory one & paid the $45 difference. I did this for preventative maintenance & peace of mind after reviewing this forum and the point of no return if the dampener causes a cracked crank. I guess you can call it mild paranoia but can only defend the position cause I could afford it. I was really impressed with how much rubber is in the pulley and what great shape the original was in. The main dampener was also not challenged. I have saved both just in case needed, main dampener for maybe future rebuild. Main point though is that after a 500 mile trip last weekend, the motor was significantly smoother than before. I had noticed a little vibration in about a 300 rpm band that is now gone. Hope that this was a solid decision but maybe never know!
    95 K2500 Suburban, orig owner, 101000 miles,F vin, Banks Stinger system in 2000 (EGT & Boost gages,air intake,K&N,chip), CAT reqd here, 3.73 posi, 4L80E w/mercon V semisynthetic, Flight Systems remote PMD (#9 res), new IP @78,000 under warranty,SSD cooling sys w/ Dmax fan upgrade @95600 and all new hoses. New main pulley & Fluidamper @99200. PMDCable extension to bumper @ 101000. Walbro FR pump w/prefilter. FloPro Crossover. Diamond Eye 4" exhaust and high flow CAT

  8. #8
    Join Date
    Feb 2007
    Location
    Lincoln, NE USA
    Posts
    712

    Default

    Although Walt has never confirmed it with me when I asked him flat out, it appears the specs for the performance cam he sells is the marine cam. If so, it is designed to flatten the torque band out more above 1800 RPM, giving the 6.5 a more useable, wider power band at constant, high (3,000 rpm) speed such as would be found cruising at 3/4 power where there would be varying load on the motor (ie: bouncing on waves with prop in/out of water). This wouldn't help bottom end "grunt", but would be much better for a deep geared (4.56 or deeper) load hauler that sees hiway speeds.

    True, more fuel + air = more power, but the cam will still affect the engine's breathing and useful power rpm range, even on a diesel.

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