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RC Car Actions "How to port a Nitro Engine"

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RC Car Actions "How to port a Nitro Engine"

Old 04-15-2012, 03:29 PM
  #726  
srt10
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Default RE: RC Car Actions

Does anyone have some pictures of what these mods should look like on a Mach 427 motor?
thanks [:-]
Old 04-15-2012, 03:37 PM
  #727  
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Default RE: RC Car Actions

Not yet. I will in a couple days. There is a brand new one sitting on the shelf awaiting some special treatment.
Old 04-15-2012, 03:53 PM
  #728  
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Default RE: RC Car Actions

right on buddy!!
Old 04-17-2012, 03:47 PM
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I don't have any picturesof it yet. There is 2 more 3.3's to do then I can get to my own motors again.

Got a call from a guy today that I had done another 3.3 for and he told me that he got a run in with his 4tec and had a local cop clock him. He said it got 96 mph in about 200 ft but had to shut it down because there was only 300 of pavement next to a high school football field. He ended up crashing and breaking a few things so he didn't get another run or any video. I am sure that there will be a video sent real soon so I can post that for the nay sayers.

I have a couple cars that I've done up but run out of gearing options so they are too fast to even think about getting any traction. They would be more of a drag than a top speed.
Old 04-23-2012, 08:24 PM
  #730  
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Default RE: RC Car Actions

Sounds like a wicked video. Post it up for us!
Old 04-24-2012, 02:55 AM
  #731  
Road Warrior
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Default RE: RC Car Actions

He didn't make the video yet. It was just him and the cop for that run. As a backup though I just bought a hpi racer 2. All I have are ofna cd3s and they don't have 100 mph gearing options. So of he doesn't send me one which he should because he calls me just about every day to talk. I can make my own vid when that shows up and I get it dialed in.

You know how it goes with some people since your a motor guy as well.
Old 04-27-2012, 09:58 PM
  #732  
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Hi there, I finally did this port mod to my Hpi Nitrostar .25 - it really was not hard at all (well I'm very mechanically inclined lol). The reason why I did the port mod is because my clutch went out and since I had the motor out I decided to give it a shot. Who does not want some extra free power from their motor right? Well I am still waiting on my clutch parts to come (went with Max Life shoes and Mugen 1.0 springs) - I will come back and post my results once its on the road again!

Old 05-01-2012, 05:15 PM
  #733  
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Default RE: RC Car Actions

I got those pictures and updates from my guy in MO. He is 65 and his throat collapsed so he is in the hospital for now. My car is just about done in the mean time. There is a few issues to work out like the linkage, tap motor mounts, and play with some gearing but its coming.

There is more work done to the block and a couple other parts but this will get you enough of a gian to make you satisfied.
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Old 04-24-2014, 05:54 PM
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lez1troubles
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Hi folks. I am still running the GX.21 engines. :-)
Old 04-26-2014, 11:31 AM
  #735  
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Are any of these P&L qualified as "porting"?
moby
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Old 04-28-2014, 01:23 AM
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Likely just fancy artwork.
Old 04-28-2014, 09:04 AM
  #737  
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Looks pretty Moby but also looks like a lot of material has been removed....two things happen...the crankcase volume increases and flow speed decreases...
Old 05-01-2014, 03:06 AM
  #738  
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Originally Posted by mobydickk


Are any of these P&L qualified as "porting"?
moby

very artistic...very clean work... ( I know whos that is ) .......However all that flash really will do nothing to make any more power........ Of course there could be timing changes in there to help power...but all the fancy flowwork on that sleeve is purely cosmetic.........Work sure looks clean
Old 05-19-2014, 09:31 AM
  #739  
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people say the same stuff about your work
Old 05-27-2014, 04:50 PM
  #740  
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Originally Posted by savagecommander
people say the same stuff about your work
Savage, where U talking about my P/L mods?
Old 05-29-2014, 07:46 AM
  #741  
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Originally Posted by supertib
very artistic...very clean work... ( I know whos that is ) .......However all that flash really will do nothing to make any more power........ Of course there could be timing changes in there to help power...but all the fancy flowwork on that sleeve is purely cosmetic.........Work sure looks clean
    Supertib
    Not sure what your comment “I know whos that is), isabout, I do all of my own piston and liner mod”s, have for over 40years, On your statement “However all that flash really will donothing to make any more power”, and “ but all that fancy flowwork on that sleeve is purely cosmetic”, leads me to believe that Uhave never tried to fully modify a piston and sleeve for max power orU do not understand the basics of increasing maximum air and fuelinto the combustion chamber to increase horse power.
    The 4 stroke V engines increase there air and fuel intakeby using larger valves on the intake and exhaust, which is the samething I do on the 2 stroke engines by enlarging the boost andtransfer port area and using radiused curves to increase highpressure flow into the boost and transfer ports, the 4 stroke Vengines also change the cam to increase intake and exhaust timingnumbers,”bring more fuel and air into the engine”,which is what Ido by changing the crank timing numbers. the boost,transfers,andexhaust numbers, in the 2 stroke engines, using my engine analysisprogram data.
    I have included some basic engine numbers from the 3.3engine, also included at the bottom a quick look at recommended carbsize based on a rpm of 31000 and the same engine with RPM at 5000.
    Date 03 21 2011
    engine Traaxas 3.3
    serial # 321
    practical RPM 31000
    engine bore 0.665
    engine stroke 0.578
    rod length C to C 1.118
    max rod angle 15.0
    exhaust swept 0.428
    exhaust duration 159.6
    boost intake duration deg. 115.1
    boost swept stroke total 0.522
    transfer swept stroke tot. 0.501
    head clearance in. 0.015
    head volume cc 0.19
    compression ratio 9.3
    rotor open in.tol/top 0.587
    rotor open degrees ATDC 216
    rotor close in. tol/top 0.250
    rotor close deg. ATDC 65
    rotor duration degrees 209




    timestudy @ 31000 RPM in seconds
    exhaustexchange time 0.00086
    intakeexchange time 0.00068
    rotorexchange time 0.0113
    optimalcarb size in. .321


    timestudy @ 10000 RPM in seconds
    exhausstexchange time 0.00266
    intakeexchange time 0.00210
    rotorexchange tiime 0.00349
    optimalcarb size in. .210
    Old 05-29-2014, 08:18 AM
      #742  
    supertib
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    sorry Moby but that sleeve is just goofy doodle cosmetic that does nothing to aid performance,.Unless your the person I think you are that is not your work...please post a few more pictures of your engines ?

    FYI my name is Neal Smith, I own Clockwork Racing Engines..I Am a expert in maximizing the performance of these nitro engines and have been for many years now..... I also own a dyno and my own race track and I have my own race team, and under my guidance we have won 5 national offroad titles....

    So n the end it is you who is mastaken on who knows what here.......Figured I should get you up t speed before you say anything else silly.......
    Old 05-30-2014, 09:12 AM
      #743  
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    So Moby, in your timeline, you've done mods on the Veco .19 and K&B 3.5 cc engines?

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