Unforgiven Project

Discussion in 'trucks' started by Unforgiven, Feb 20, 2019.

  1. Indycars

    Indycars Administrator Staff Member

    I typically work on these things in the afternoon, like starting around 3 pm. Besides Dynomation, I
    also have PipeMax for designing headers. Now PM requires a lot of measurements, like port length (PL)
    at the centerline and port volume. To measure PL you will need to use some 1/8" pin-stripping tape
    and lay it along the short side and long side. Then pulling out and lay them down in a straight line to
    measure, then take the average. Also need a actual Dyno output for best accuracy, but our simulation
    will work. Might have something tomorrow maybe.

    Be sure to page down, there is lots of info.
    http://maxracesoftware.com/PipeMaxPro400.htm

    Just depends on how far you want to take the theoretical.
     
  2. Unforgiven

    Unforgiven solid fixture here in the forum

    WOW.. that is alot of info. I am no where near ready for header design.. Just getting ready to rebuild the race motor, I like Grumpy's Idea
    of keeping the compression the same and only having to change the cam and blower pulleys to make it a street friendly engine. I like this idea because by the time her car is ready for an engine, I will be getting out of the truck scene. This will allow me to repurpose this engine and save some money. It will
    be more than enough to put a smile on her face.
     
  3. Indycars

    Indycars Administrator Staff Member

    Yeah, I was just throwing it out there so somewhere down the road you will know in case
    you wanted to get that deep. ;)
     
  4. Indycars

    Indycars Administrator Staff Member

    Couldn't resist messing with another simulation, so here are the results. I didn't change the SCR
    since it was already 11.13. I picked 5 psi for the boost pressure, but it approximately 25 Tq/HP
    for each 1 psi, I tried both 4 & 6 psi and the difference was about 50.

    Sim01_vs_Sim02.jpg
     
  5. Unforgiven

    Unforgiven solid fixture here in the forum

    Both cams look like they don't wake up until 3000 RPM's. But DAMN... that is an awesome torque curve!

    I would have thought the blower would have flattened the curve more so below 3000 RPM.

    I was expecting to see a flatter curve with the smaller duration cam under 3000 RPM'S .. but it looks like it follows the same curve
    as its bigger brother. Now I am going to have to think about what is making them follow the same peaks on the curve.


    I wonder how the engine would perform with a (built) automatic (TH 200-R4) ( :)) trans behind it for every day driving.

    Thank you Rick. That was cool to see!
     
  6. Unforgiven

    Unforgiven solid fixture here in the forum

    So... I got a qoute for media blasting the car....:eek::eek::eek::eek:
    Local guy wanted $1500

    A day later Alesia came home with this....Then said ....you got all summer!:eek:o_O:(

    paint stripper.jpg

    At least she could have gotten an 8" disk..
     
  7. Indycars

    Indycars Administrator Staff Member

    Are you reading the graph correctly, The curve begins at 2600 rpm.

    I think it would depend more on the rear gear ratio, then the trans.

    You are welcome !
     
  8. Loves302Chevy

    Loves302Chevy "One test is worth a thousand expert opinions."

    At least she didn't give you a bag of walnut shells. :rolleyes:
     
    Unforgiven likes this.

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