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Projects rebuilding after the crash

Discussion in 'The Hokey Ass Message Board' started by racer-x, Sep 19, 2015.

  1. I covered this subject in the past. I feel it's so important I will repeat the info. The intake gets torqued into place. It's then packed with towels. Good bath towels cover the rockers and injectors. The intake has lay out dye brushed onto it. It's then sanded until it's flat. I use a large plate with handles on one side and sand paper glued to the bottom. The third pic shows the low spots after just a few passes. I vacuum the intake before I remove the rags. Aluminum studs are then screwed in. I use anti seize on both ends of the stud. A o-ring is then placed in the groove. The blower is then torqued to 30lbs. Remember the clearances in a blower are only a few thousand any distortion on the intake deck is tranfered to the blower case. A crooked case is a great way to trash a blower. If paper gaskets are blowing out between the blower and manifold it's usually due to a uneven deck surface. Or if a clicking sound is heard coming from the blower when it's running. 20180526_163448.jpg 20180526_164628.jpg 20180526_170927.jpg 20180526_180115.jpg
     
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  2. Now that the top of the engine is on all 20 fuel lines for the nitro can be connected. When I was in Detroit for the autorama I stopped by kinsler fuel injection. I brought the manifold and blower with me. They can make custom length fuel lines while you wait. It was nice to have it sitting there all set to go on. The fuel tank and line was hooked up after some modificatios. The new 7 gallon tank needed new mounts. It sits just a little bit higher than the old one. The new position makes the feed lines angles much better from the tank to the pump. The line won't be able to restrict the flow due to small kinks. A lot of little things were connected regarding the efi setup.With any luck we should be making noise at bowling green. 20180526_222123.jpg 20180526_222010.jpg View attachment 3912351
     
    Last edited: May 26, 2018
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  3. The 39 guy
    Joined: Nov 5, 2010
    Posts: 2,948

    The 39 guy
    Member

    [​IMG]
    That is gear head art right there......It's a shame you have to cover up all of that pretty machinery to run the engine.
     
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  4. Hey Brian,

    Took a little while to find a good video showing how a ARB air locker works, but here it is. https://www.google.com/search?q=how...KHc82CzMQtI8BKAB6BAgBEC8#imgrc=EDi0WToJADCfWM:

    And this one shows how they solve the problem of fitting a fixed air line to a rotating component (as the video shows, their method has removed for a little improvment).



    Seems like something like this would be able to be scaled down to fit the blower snout.

    Sent from my SM-G955F using The H.A.M.B. mobile app
     
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  5. Thanks for the ideas. The clutch I need goes between the fuel pump extention and the dual drive. It needs to connect two hex shafts. I can get a good pic posted later today. My last post shows the dual drive.
     
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  6. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,354

    Johnboy34
    Member
    from Seattle,Wa

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  7. Dick Stevens
    Joined: Aug 7, 2012
    Posts: 3,022

    Dick Stevens
    Member

    That will be beautiful music, Hot Rod Hemi Rhapsody!
     
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  8. TerrytheK
    Joined: Sep 12, 2004
    Posts: 844

    TerrytheK
    ALLIANCE MEMBER

    I love this thread! :cool:
     
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  9. After three non stop days of turning wrenches it's getting close to being fired up. A few loose ends need to be tied up first. 20180527_220047.jpg
     
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  10. Tonight I will discuss the fuel system. Last year I ran a 12 nozzle system. It idled off four nozzles above the blower. As the rpm went up and fuel pressure exceeded 15 lbs a valve located at the rear of the blower opened sending fuel to the port nozzles. See pic one.
    The valve has a spring and poppet inside. The spring can be shimmed to vary the opening rate. See pic two.
    The barrel valve located at the front of the injector has a spool inside. The spool has a groove cut into it called a ramp. The ramps groove is machined based on engine size; fuel used; or blown. The idle is set using the throttle blades and barrel valve. The barrel valve is set by the leak down percentage using a leak down gauge. Pic 3 shows what the fuel sees at idle. The hole returns fuel to the tank. At 6 o'clock the beginning of the ramp can be seen. Pic 4 is full throttle. A big area is exposed at 6 o'clock. We set our leak around 80 percent on the gauge. When the car starts up fine adjustments can be made by turning the hex shaft. The pipes should look mostly dry with a little moisture on the ends. Too much fuel pollutes the oil and the engine does not build heat. There is also the chance of dropping a cylinder. Too little fuel causes a stumble on take off and the engine builds too much heat while staging. Getting the correct balance is key.

    The new set up uses 20 nozzles. It will idle off the four above the blower. These four not only keep the blower cool they also help tighten it up as the fuel takes up some of the clearances. The other 16 nozzles perform two functions. The fisrt set of 8 are normal nozzles that are used for setting the idle. The second set of 8 have a spring and check ball in them. They are set at 15 lbs. See pic 5. The valve located behind the blower has the spring and poppet removed when using these. The advantages are it's easier to tune and the fuel is right at the nozzle with no delay in delivery. A larger volume can also be delivered. Running bigger nitro percentages takes a lot of fuel to go down the track under power. Burnouts and staging need less. To keep the plugs clean; build heat and save fuel a high/low valve can be plumbed in. See pic 6. The valve is controlled from inside the car with a cable. The valve is opened for the burn out. A pill inside the valve meters the amount of fuel returned either back to the tank or to the pumps inlet. When the car is staged the valve is closed giving the engine full fuel for the run. The engines rpm will drop and the pipes go from dry to slightly wet. The engines exhaust note be change. It's now go time.
    The engine needs to be tuned with the nozzles. Spark plug readings become very important. We look to see how much cadmium has been removed. We also look at the ground strap to see if it got burned off do to a lean condition. Melted piston will also show up on plugs. Plug reading is a art all to itself. The idea is to get all the plugs looking the same and not too hot or cold. I prefer this method. Some teams juggle piston of different compressions or different thickness head gaskets to make a bank hotter or colder. There are many ways to achieve the same goal. Also seen in pic 6 is the shut off valve. These engines are shut off by running them out of fuel. Turning off the ignition can cause engine damage.
    This is a quick intro to a nitro fuel system and is not intended to be a all encompassing read on the matter. It's more to point out some key parts and explain how some of them work. Now when you go to the track and see the nitro cars get worked on and run it gives you a better understanding of what's going on. Hopefully the trip to the track will be more enjoyable. It should also serve to give a better appreciation of what the teams tuner has to do. When the tune up call is wrong the nitro gods will cone down on you hard. Tough as it is there is nothing like nitro racing. 20180528_211229.jpg 20180528_232323.jpg 20180528_214614.jpg 20180528_214720.jpg 20180528_210537.jpg 20180528_211454.jpg
     
    Last edited: May 29, 2018
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  11. loudbang
    Joined: Jul 23, 2013
    Posts: 32,200

    loudbang
    Member

    EXCELLENT SYNOPSIS as usual.
     
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  12. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,354

    Johnboy34
    Member
    from Seattle,Wa

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  13. Gray Ford
    Joined: Oct 18, 2008
    Posts: 491

    Gray Ford
    Member
    from Illinois

    Is the "High-Low" valve the part that you sometimes see a Funny Car crew member flip right before the body is dropped & secured after burnouts are completed ???
     
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  14. No the high low is controlled by the driver from inside the car. After a burn out a crew member removes the throttle stop. This stop is a piece of aluminum that has a groove machined into it. The groove goes onto the throttle cable and it is held in place with a pin. It allows the throttle to open only so far. This prevents over revving situations that can hurt parts. After the car backs up the limiter is removed. The crew may also remove plugs called air bleeds. These plugs fill holes that are located behind or below the butterflies to lean out the mixture and increase rpms. Some use tape over the holes and pull off as many as are needed. I use a rotating knob with a slot. More slot more air more rpm. Other crew members may be doing other things like turning on the data recorder or removing parachute pins. a good crew can get the car started and staged with no theatrics. It should be so smooth it looks like no one is really doing anything but in reality there is a lot going on.
     
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  15. Gray Ford
    Joined: Oct 18, 2008
    Posts: 491

    Gray Ford
    Member
    from Illinois

    Thanks for taking the time to provide the explanation ... This is how we learn !!.. :)..
     
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  16. Speedwrench
    Joined: Nov 21, 2009
    Posts: 1,027

    Speedwrench
    Member

    OK - silly question. Do you have to do the resurfacing of the manifold / blower interface every time the manifold is removed from the engine or is it one and done after the first installation?
     
  17. One and done. It's not a silly question.
     
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  18. Runnin shine
    Joined: Apr 12, 2013
    Posts: 3,243

    Runnin shine
    Member

    What the status of the old setup’s oil cooler? Wait and see? Or one of the loose ends?


    Sent from my iPhone using The H.A.M.B. mobile app
     
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  19. Here's some of the details that I needed to get done. The only big things that remain are the water tube mods and the alternator brackets welded to the chassis. The puke tanks also need to be made. The two chute mounts were welded on. The system one oil filter was mounted. It was mounted with the cap facing up. That way when it's serviced oil isn't pouring all over. The kill switch was moved closer to the steering wheel. It was placed close to the fuel shut offs. With one push of my hand I will be able to turn off the fuel and ignition. After last summer's mess this was high on the priority list. The steering shaft needed to be moved. To make it work and clear the oil pump a double u joint needed to be added. The oil cooler is larger this year by three inches. I'm still able to get my hand on the mag to set the timing. The golf cart was sent to John shepards for a little bling. He laid down some real gold leaf to match the car along with some pin striping. I think it's just enough to set it off. Another weekend of work should get me real close to firing it up and driving it. 20180601_195159.jpg 20180601_195216.jpg 20180601_195234.jpg 20180601_195259.jpg 20180601_195325.jpg 20180601_195623.jpg 20180601_195639.jpg
     
  20. 1949 caddyman
    Joined: Jun 30, 2010
    Posts: 225

    1949 caddyman
    Member
    from arizona

  21. Tomorrow the car goes back to the chassis shop. For the last few weeks I have been dropping it off on Monday morning and picking it up on Friday after work. I get alot of work done on the weekend. I just need the oil pump to start it up. I should get it this week. Besides the work on the car I mounted the tow hitch on the golf cart. I also got the trailer set up for the season. Fresh sheets on the bed and the water tank filled were part of it. The generator was checked out and tested. With any luck the car will be at the Chrysler employee car show in auburn hills next week. It's going to take a huge effort to get it cleaned up for that show and bowling green. The work never ends.
     
  22. Stogy
    Joined: Feb 10, 2007
    Posts: 18,084

    Stogy
    ALLIANCE MEMBER

    @RacerX is that steering where you want it or is it adjustable to your preferred position as it seems low from my perspective?​
     
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  23. It's non adjustable. I think it's the way the pic was taken that makes it look low.
     
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  24. micky69
    Joined: Dec 24, 2010
    Posts: 287

    micky69
    Member
    from Ohio

    Looks great Brian!
     
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  25. thanks. i will look for you in bg. maybe we could go into town for a good dinner one night if you have time.
     
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  26. micky69
    Joined: Dec 24, 2010
    Posts: 287

    micky69
    Member
    from Ohio

    I wont make BG this year otherwise that wold be great. Going on the Hot Rod Power Tour for work. Will see you at Drag week.
     
  27. saltflats
    Joined: Aug 14, 2007
    Posts: 10,440

    saltflats
    Member
    from Missouri

    Brian you can buy me dinner. :D
     
  28. If your showing up I will.
     
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  29. saltflats
    Joined: Aug 14, 2007
    Posts: 10,440

    saltflats
    Member
    from Missouri

    We will be there sometime Wednesday afternoon.
     
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  30. Steak and shake here we come.
     

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