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New Comp Thumper cam

This is a discussion on New Comp Thumper cam within the Firebird / WS6 forums, part of the Vehicle Specific category; Need tuned BAD...But can't drive far before she starts running really bad & shuts down...The weird thing is the temp ...

  1. #1
    Member 20ws6speed01's Avatar
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    2001 WS6

    New Comp Thumper cam

    Need tuned BAD...But can't drive far before she starts running really bad & shuts down...The weird thing is the temp gauge drops down when it want's to stall...
    (click to play vid)
    [IMG][/IMG]
    [IMG][/IMG]
    Last edited by 20ws6speed01; 01-26-2011 at 02:29 PM.

  2. #2
    now greybat66
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    nice good luck when getting her tunned let us know horsepower numbers once u get it tunned.

  3. #3
    Member 20ws6speed01's Avatar
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    Sent PCM to Frost because I dont think she'll make it to a dyno(not running very good)...should b on the road next week...Can't wait!!!

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    Moderator Firebirdjones's Avatar
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    That's the smallest of the thumpers they make. I'm running the Mutha-Thumper (the middle of the 3 versions).

    Did you degree it? I see on your cam card they are calling for a 103* intake centerline. That's 6* advance from your 109* lsa.

    Mine was a 107* lsa with an intake centerline of 102*. Not as much advance ground into mine.

    They make a nice flat torque curve that comes in quick and stays there.

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    Member 20ws6speed01's Avatar
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    I put it in straight up..not to worried about it for now..And yes I know it's the smallest thumper. didn't want BIG...Thats what my '79 Chevy K-20 w/454 is for

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    Senior Member bluehawk2000's Avatar
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    Damn sounds good man can't wait to see the numbers after the tune!!

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    Member zmg00camaross's Avatar
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    yeah I would be interested in the numbers.

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    Moderator Firebirdjones's Avatar
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    Just a heads up,,,,the tight LSA and the overlap these cams have don't produce alot of vacuum. Your power brakes might have fits.

    I run mine in a 406 and even that large of an engine still only produces about 6-8 inches of vacuum at idle.

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    Member 20ws6speed01's Avatar
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    ^^^^I had 18in When it did idle....going to check it again i get my PCM back from Frost

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    Member 20ws6speed01's Avatar
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    Just got the PCM back in...Plan on taking her out tomorrow if it's not raining...no more stalling out..

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    Senior Member bluehawk2000's Avatar
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    Sweet you should take a video of it to, can't wait to see how she runs what does she idle at now?

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    Member 20ws6speed01's Avatar
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    WOW!!! 1st,2nd&3rd up in smoke...Idle is alot smoother..I'll get a video soon

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    its short but its skinny. jiveass's Avatar
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    what kinda heads are on it?

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    Moderator Firebirdjones's Avatar
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    That's what an early flat torque curve will do for ya. Makes for a very fun street car.

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    Member 20ws6speed01's Avatar
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    Quote Originally Posted by jiveass View Post
    what kinda heads are on it?
    Stock heads..just cam,LT's,ORY-pipe,bolt on's & PCM tuned by Frost

    That's what an early flat torque curve will do for ya. Makes for a very fun street car.
    It's so much FUN now!!!

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    its short but its skinny. jiveass's Avatar
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    yea id like to know the hp numbers as well....especially with stock heads...if its nice, i may go with somethin like this.

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    Member dbrichrider33333's Avatar
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    did u have to put in different lifters or anything else when you put the cam in? or did you just put the cam in and go? well with the tune of course too haha..im very interested in doing this and just wanted some input on your setup. sounds great btw!

  18. #18
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by jiveass View Post
    yea id like to know the hp numbers as well....especially with stock heads...if its nice, i may go with somethin like this.
    I wouldn't get too caught up on HP numbers. That's not what this cam was really designed for, although it should make respectable HP. They shine more with a nice flat torque curve that comes in early in the rpm range due to their tight LSA. That's what makes the car fun to drive.

    I run the bigger version of this cam, and Comp says it starts making power as early as 2,000 rpm and peaks at 6,100. That's in a little 350. I'm running it in a 406. I can tell you it makes gobs of torque nearly right off idle and has extremely snappy throttle response.

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    its short but its skinny. jiveass's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    I wouldn't get too caught up on HP numbers. That's not what this cam was really designed for, although it should make respectable HP. They shine more with a nice flat torque curve that comes in early in the rpm range due to their tight LSA. That's what makes the car fun to drive.

    I run the bigger version of this cam, and Comp says it starts making power as early as 2,000 rpm and peaks at 6,100. That's in a little 350. I'm running it in a 406. I can tell you it makes gobs of torque nearly right off idle and has extremely snappy throttle response.
    this pleases me....

  20. #20
    Member 20ws6speed01's Avatar
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    Quote Originally Posted by dbrichrider33333 View Post
    did u have to put in different lifters or anything else when you put the cam in? or did you just put the cam in and go? well with the tune of course too haha..im very interested in doing this and just wanted some input on your setup. sounds great btw!
    I also installed new comp 26918 valve springs w/new comp retainers & lock..(since I was there i did new valve seals)...and a trick flow double roller timing chain...TS ls6 oil pump...changing out the spring SUCK,but it's a MUST


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