Engine Drivetrain 1st Gen Cooper Schrick question

Discussion in 'Tuning and Performance' started by AliceCooper, Nov 13, 2010.

  1. Nathan

    Nathan Founder

    Mar 30, 2009
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    Actually Mark, it was someone else that revived this thread.

    Jim, you are correct, it is not M/A vendor bashing per-say, it's just plain old vendor bashing without the M/A.
     
  2. minimark

    minimark Well-Known Member

    Jun 24, 2009
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    I stand corrected Nathan, it was the second post which Thumper chose to slam RMW in, even when RMW wasnt mentioned.
     
  3. goaljnky

    goaljnky New Member

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    So now I have a question? Who wants to join the moderated posting list? It is not very long, but it is distinguished. Get my drift?
     
  4. WolfGTI

    WolfGTI Active Member

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    Need duct tape or head will assplode...
     
  5. Nathan

    Nathan Founder

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  6. RallyMini370

    RallyMini370 Well-Known Member

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    9:1 or maybe a 9.5:1 seems a little low for a N/A MC? I thought standard CR for a MC was 10:5:1? remember this is not an MCS
     
  7. Thumper460

    Thumper460 Active Member

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    #27 Thumper460, Jul 11, 2012
    Last edited: Jul 11, 2012
    lol... you are 100% on the button... the thread started a r53, and then this question was "MC" duh... and 10:1 is the norm, sorry!!

    The NS1 cam was designed with the r50 ( MC) in mind. NO tune needed ( but always better) Keeping in mind the n/a engine is going to need a low end loss to pull power on higher revs at the track ( above 6900 revs). to get more power , you will need the valves open longer to allow air flow int the cylinders.. ( duration ) this will take the low power away and transfer it to more top power. The NS1 cam is right in the sweet spot. The lowend ( below 2000 revs) will be sacrificed a bit.. but after that.... the car rocks up to the red line of 7200 revs.

    With the ported Head you have.. adding the NS1 will amaze ya!! here is a testimony from a rally car driver..



    Still breaking things in, so I'm taking it a bit easy for now, but I've gotten on it several times and it's very, very nice. It actually chirps the tires shifting into 2nd at WOT and redline, which it never did before.

    One of my biggest complaints with the Shrick cam was the peakiness of it - nothing below 4000 RPM's, then all the power from there up and then falling on its face above 6400 RPM. And, a major, major dip in power between 3K and 4K rpms. While ( edit name of Shop) tuning did take some of that out and improve driveability, it couldn't take it all out.

    With the current setup (Tpr1 and NS cam), the dip between 3-4K RPM's is gone. It keeps pulling all the way to redline - and I think it would keep going, so I'll need to get that bumped up. No more drop off! Part throttle acceleration is crisp - full throttle is greatness. It actually pulls everywhere, even down low, although the fun really starts at 4000.

    ( edit of racing team) Racing


    I hope this helps you.. and sorry for 'assuming you had the r53'

    Just me...................................

    Thumper
     
  8. Jan

    Jan Well-Known Member
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    May 16, 2010
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    just to clarify inaccuracies in posting above:

    •Engine: 1,598 cc 1.6 liters 4 in-line front engine with 77 mm bore, 85.8 mm stroke, 10.6 compression ratio, overhead cam and four valves per cylinder
    •Fuel: Premium unleaded fuel
    •Fuel economy EPA highway (l/100km): 6.4
    •Fuel Injection: Multi-point injection fuel system
    •Fuel Capacity: Main 50 liter premium unleaded fuel tank
    •Power: SAE and 86 kW , 115 HP @ 6,000 rpm; 110 ft lb , 149 Nm @ 4,500 rpm

    Understanding intake manifold design, exhaust manifold etc you will come to the truth about what is claimed in camshaft design and function.
     
  9. Thumper460

    Thumper460 Active Member

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    Yep.. what he said...

    Thumper
     

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