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Specs on a 330hp/350 cam

Discussion in 'The Garage' started by Blaze, Dec 20, 2002.

  1. Blaze

    Blaze 1/2 ton status

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    I have a cam sitting here out of a Chevy crate motor, the 350, 330 hp one. It only has 20k miles on it and I have the lifters, too. My 92 Yukon is starting to act up a little and I suspect it is the camshaft and timing chain. My wuestion is this, what gains would I get by going to this cam and a roller timing chain? I do mainly highway driving to and from work, but I also tow Trans Ams on almost every weekend. What do you guys think? /forums/images/graemlins/confused.gif
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> I suspect that the computer would throw a fit trying to figure out how to deal with that much cam, but I could be wrong. </font color>
     
  3. Thunder

    Thunder 3/4 ton status

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    Specs For the new 350 HO crate engines:



    Horsepower: 330 hp @ 5,000 rpm
    Torque: 380 ft/lbs @ 3500 rpm
    Compression Ratio: 9.1 to 1
    Block: Cast Iron 4-bolt, 4.000" Bore
    Crankshaft: Cast Nodular, 3.480"
    Stroke
    Heads, Chamber Size: Vortec Cast
    Iron, 64cc Chamber
    Valves (I/E): 1.940"/1.500"
    Camshaft, Lift (I/E): 0.435"/0.460"
    Hydraulic
    Dur. @ 0.050" (I/E): 212/222
    degrees

    The cam has a little too much duration for a 92 TBI engine. The computer normally doesn't like durations over 212 degrees. 222 on the exhaust is a little high. It may affect idle and off the line performance.
    But you can get a new chip burned for that cam or a adjustable MAP sensor and it should work fine.
     
  4. Blaze

    Blaze 1/2 ton status

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    So if I get a custom chip burned, you think it would be ok?

    Would you guys recomend this for towing or not?
     
  5. Thunder

    Thunder 3/4 ton status

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    Yeah should be Ok. Its pretty common to get chips burned for those HO 350s
    These guys know what they are doing:fastchip.com
    They probabally have one in stock for your needs.

    Also Check out:turbocity.com
    You will probabally want to modify your TB to flow better for that cam. They also are good at burning custom chips.
    I have delt with both of these people and have been happy with the results.
     
  6. Blaze

    Blaze 1/2 ton status

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    Thanks! So you think it'll be fine for towing? I think I'm gonna do it. Once I get my 79 TA back I'm gonna do it and drive the TA around while the truck is being worked on.
     
  7. Thunder

    Thunder 3/4 ton status

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    I'm not really sure. The 350HO has Vortec heads and that cam is probabally ground for them. The heads on your 92 are different. Bigger chambers, lower compression. 8.2 to 1 I think.
    But it is not that radical of a cam. And I'm sure you can get a chip burned to make it work for your needs. Call the people at the links I gave you. They should be able to give you some good info.
    Both have been pretty helpful on TBI engines I have built.
     

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