Page 2398 of 2412 FirstFirst ... 13981898229823482388239623972398239924002408 ... LastLast
Results 35,956 to 35,970 of 36176

Thread: ESE's works engine tuner

  1. #35956
    Join Date
    18th May 2007 - 20:23
    Bike
    RG50 and 76 Suzuki GP125 Buckets
    Location
    Auckland
    Posts
    10,183
    Click image for larger version. 

Name:	20211019_075102.jpg 
Views:	108 
Size:	860.5 KB 
ID:	349839

    The PS92N Crain coil, DCCDIP2Race Ignitec ignition and Champion C53VC 694 surface gap spark plugs have just arrived for my 250cc rotary valve methanol burning Post Classic pre72 Kawasaki. Should be fun.

    Wob tells me that dumping both sides of the twin cylinder Ignitec CDI ignition unit at the same time into the low impedance Crain coil and a very cold plug is the hot go for my single cylinder methanol engine.

    Click image for larger version. 

Name:	PA-KawasakiF9R-2018-006.jpg 
Views:	68 
Size:	598.5 KB 
ID:	349840

    Not my bike, but it gives you an idea of what I am aiming for.

  2. #35957
    Join Date
    8th February 2007 - 20:42
    Bike
    TZ400
    Location
    tAURANGA
    Posts
    3,436
    The TZ350 has maybe being kind , Yam 6 in stock form , but when using a bored/stroked TZ250G with reeds/boost ports , and reworked angles its for sure Yam 14.
    And that allows fat pipes to make serious power - no reason yours could not have the same , if the A port front wall is re angled.
    The RD/TZ series has 102 bore centers , way worse than yours with near the same bore .
    We would kill to have 120 , and yes a monoblock can help dramatically - as we have using CPI cylinders on the YPVS / Banshee with only 102 centers.
    But fitting anything bigger than just over 120 diameter is brain damage on a YPVS or post classic racebike.
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  3. #35958
    Join Date
    18th March 2012 - 08:35
    Bike
    Homebuilt chassi, Kawasaki 212cc
    Location
    Sweden
    Posts
    588
    I use a simple PVL dual coil and NGK br9ecmix plugs in my total loss ignitech system(just a 4amp lithium battery, dragracing) same system as you TZ350, but for one cylinder, with dual coil to fire two cylinders.
    I run e85 in my TZR250 engine, no hickups no nothing.
    I also ran the system with single coil(PVL) in my kawasaki engine(1cyl methanol) and dynoed almost 70hp from that one(same sparkplug), no problems at all.

    Sometimes i wonder if the interwebs is recommending the expensive stuff just to make it hard for people to reach their goals

    The dual coil.
    Click image for larger version. 

Name:	IGC-4002.jpg 
Views:	18 
Size:	31.1 KB 
ID:	349841


  4. #35959
    Join Date
    18th May 2007 - 20:23
    Bike
    RG50 and 76 Suzuki GP125 Buckets
    Location
    Auckland
    Posts
    10,183
    Quote Originally Posted by SwePatrick View Post
    I also ran the system with single coil(PVL) in my kawasaki engine(1cyl methanol).
    I have a single trigger and would be greatfull for any tips on setting up the Ignitec software to fire both sides like you do with your Kawasaki single.

    I love the sight and sound of your TZR250. https://youtu.be/-iEvQKSIVTw .

  5. #35960
    Join Date
    6th February 2012 - 08:54
    Bike
    1988 cagiva freccia
    Location
    france
    Posts
    116
    Blog Entries
    1
    Quote Originally Posted by SwePatrick View Post

    Sometimes i wonder if the interwebs is recommending the expensive stuff just to make it hard for people to reach their goals
    not necessarily

    we with ignitech are seeing a loss of power on the rgv and nx4.

    bridging of the 2 outputs, big coil and voltage of 16 V minimum. to achieve the same power as the original cdi.

    ignitech has a badly matched converter or capacitor or too low capacity to deliver enough milli joules

    many have abandoned them to return to the original cdi, or to turn to other manufacturers for race use.

    it is not a racing cdi, the electric power collapses after 10,000 laps.
    good replacement for road bike.

    Click image for larger version. 

Name:	IMG_20211007_112942.jpg 
Views:	47 
Size:	616.3 KB 
ID:	349842Click image for larger version. 

Name:	IMG_20211007_112911.jpg 
Views:	69 
Size:	657.7 KB 
ID:	349843

  6. #35961
    Join Date
    8th February 2007 - 20:42
    Bike
    TZ400
    Location
    tAURANGA
    Posts
    3,436
    All DC DC CDI ignition systems are extremely sensitive to matching of the output impedance of the voltage converter to the inductive reactance/resistance of the coil. Many have tried to simply replace the NX4/5 ecu with an Ignitech and use the stock coil - it doesnt work ,end of. As its inductive reactance is too low and its static resistance is too high , this is not a fault with the Ignitech, it is simply an operating hardware mismatch.
    Honda chose a very different converter operating window for their version of a DCDC CDI system.

    There are limited choices to increasing the ionizing voltage and or increasing the plug gap burn period and " power discharged " - lower the primary series resistance ( under 0.2 Ohms ) , increasing the coils inductive reactance and finally increasing the power supply voltage.
    Using both CDI capacitors in parallel is a simple brute force way of doubling the available discharge energy , but this does not address the impedance mismatch that sets the burn period of the system.

    The Crane coil as is used in NASCAR cdi systems , when used with the twin outputs pulled over 4.5 Amps compared to just under 1,5A with a single cdi and conventional coil - the burn period was tripled on the scope app, exactly what is needed for high compression and very rich Methanol mixtures , required when trying to emulate the natural operating parameters of a water cooled engine with an air and chemically cooled two stroke.
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  7. #35962
    Join Date
    6th February 2012 - 08:54
    Bike
    1988 cagiva freccia
    Location
    france
    Posts
    116
    Blog Entries
    1
    1.5 A in my opinion is not sufficient for racing use.
    this should hardly exceed 30 millijoules spark plug. Road utility

    with 4.5 A it's ok. it must be over 50 millijoules. which must be a minimum for an engine compressed with a high msv and overred.

    the Crane coil and in my list of things to try. the resistance and impedance characteristics are very interesting.

  8. #35963
    Join Date
    8th December 2014 - 14:39
    Bike
    1980 Suzuki Gs1100E
    Location
    SWPA
    Posts
    126

    bore centers

    Wobbly
    I just measured the bore centers on the engine I have and I was wrong, instead of 120mm they are only 115 center to center. I'm sorry I must wrote down the wrong number when measuring the first time.

  9. #35964
    Join Date
    18th May 2007 - 20:23
    Bike
    RG50 and 76 Suzuki GP125 Buckets
    Location
    Auckland
    Posts
    10,183
    .

    Keeping up with 2Stroke Stuffing's progress with his supercharged nitro 50cc two stroke https://youtu.be/HRSmWfsvS2I

    .

  10. #35965
    Join Date
    20th June 2020 - 07:10
    Bike
    ETEC 800
    Location
    Minnesota, USA
    Posts
    90

    Cylinder head machining with manual equipment

    Pardon my ignorance to machining, I understand how the squish band gets cut in a lathe but how is the concave radius of the dome cut in a manual lathe? I watched one video of a round boring bar being rotated up with the bar holder for cutting a similar part. Is this the common method? I also seem to remember Dr. Jeff cutting a toroid chamber with a manual machine too but cannot find that anywhere. Sick of paying for my head work. It is time to buy a lathe and some tooling and learn.

  11. #35966
    Join Date
    8th February 2007 - 20:42
    Bike
    TZ400
    Location
    tAURANGA
    Posts
    3,436
    In all the RD/TZ and YPVS/Banshee race bike engines I have built - probably 20 in total, I have used DC DC CDI P2 into cheap knock off Ebay , Aprilia RS125/250 coils ( never had a failure )
    This draws about 1.5 amps per cylinder into the ECU, and the most powerfull was a Banshee based CPI 400 engine in a Pre 82 Post Classic road race bike with 96 RWHp at 11,000 rpm.
    That bike won the Sheene Post Classic TT champs, and broke the lap record by 2 seconds.
    All the bikes used CR250 DC type stators that gave 14.2 battery charging voltage ECU input. Using R7376 plugs I have never once had a problem with ignition related power loss.

    I tried a DC DC CDI P4 with the paired outputs paralled into the the two same coils on a 82 RWHP TZ twin, this gave exactly the same power on the dyno. - proving to me that ignition milli joule supply was not a limiting
    factor in that case at all.
    And a TM KZC big bore 152cc that made over 62 Sprocket Hp @ 13800 rpm on pump gas - no spark breakdown issues there either.
    Recently I tried , simply out of interest , swapping The Ignitech P2 on the Banshee 400 CPI bike , for a Zeel VPCD20 - programmed exactly the same it gave 2 Hp less but on a different dyno , so good enough for me but also
    alot more expensive .The hand held programmer box with no laptop to drag about is a real help at the track though , so I would choose that if the customer was happy to pay for the convenience.

    Also a KTM250 road race engine making 70 RWHp at 10500 on Avgas - so I really do dispute anyones statement that the Ignitech is only good for road use as its not " powerfull " enough.
    The Crane coil with paired outputs was developed for 125cc offshore hydro use , running 20:1 compression on Methanol at 14000 rpm , a really extreme case.
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  12. #35967
    Join Date
    12th March 2010 - 16:56
    Bike
    TT500 F9 Kawasaki EFI
    Location
    Hamilton New Zealand
    Posts
    2,477
    This one runs an Ignitech single cylinder, on E85, toridal head, 8mm plug. Seems so far to run alright.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	20211010_180155.jpg 
Views:	34 
Size:	907.0 KB 
ID:	349844  

  13. #35968
    Join Date
    8th February 2007 - 20:42
    Bike
    TZ400
    Location
    tAURANGA
    Posts
    3,436
    Condyn , here is a toroid setup for a 66mm domed Banshee setup.
    The straight squishband with 0.9mm squish at the bore has virtually no ( 0.34mm ) taper when transitioning into the bowl.
    This is a wide squish with a fairly big dome and imho using a tool post rotation device to match the piston dome radius is simply not worth the effort.
    The actual insert was CNC machined , but even then I didnt bother doing a radiused squish.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Head Data.JPG 
Views:	202 
Size:	150.4 KB 
ID:	349845  
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

  14. #35969
    Join Date
    12th October 2016 - 01:24
    Bike
    1964 Vespa GS
    Location
    San Francisco
    Posts
    81
    Quote Originally Posted by Condyn View Post
    Pardon my ignorance to machining, I understand how the squish band gets cut in a lathe but how is the concave radius of the dome cut in a manual lathe? I watched one video of a round boring bar being rotated up with the bar holder for cutting a similar part. Is this the common method? I also seem to remember Dr. Jeff cutting a toroid chamber with a manual machine too but cannot find that anywhere. Sick of paying for my head work. It is time to buy a lathe and some tooling and learn.
    a hemisphere of any radius can be cut on a mill with the spindle set at an angle and rotary table. you are cutting the edge of a spherical cap and by rotating the part it cuts the hemisphere. Not hard to sort out in CAD what the angle and diameter should be, I can dig up my notes.
    Click image for larger version. 

Name:	Screen Shot 2021-10-19 at 17.12.37 .jpg 
Views:	56 
Size:	154.9 KB 
ID:	349846


    I think the good Dr. did the toroid with a large ball endmill, again with the rotary table but no need to angle the head.
    Patrick Owens
    www.OopsClunkThud.com

  15. #35970
    Join Date
    20th June 2020 - 07:10
    Bike
    ETEC 800
    Location
    Minnesota, USA
    Posts
    90
    Thanks for the replys.

    Wobbly, I actually have a toroid drawing for my heads that you drew for me a few months back. I plan on having my friend CNC it when the machine is free. ( NEVER )

    OCT, Interesting. That seems like a nice method. I would be interested in any additional info you can dig up. Much appreciated.

Thread Information

Users Browsing this Thread

There are currently 8 users browsing this thread. (0 members and 8 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •