82-up Liquifire engine question
82-up Liquifire engine question
Hi guys. I actually have a couple of questions. In the tech manual it states that the 1982-up model year Liquifires with the HSR ignition system, do not use an inertia disc. My question is did they (from factory) install the flywheels with a ring gear to compinsate for this, thus no need for the inertia disc? Next question I have is,....Will the cdi box out of a Spintfire work in a 82-up Liquifire as they look very much the same aside of the coil lead lengths. Wondering if anyone ever tried it. Thank you...Rob.
Re: 82-up Liquifire engine question
Rob
My 80 Liqufire has an inertia disc attached to the flywheel. My 84 Liquifire has a ring gear, presumably to add electric starting. I think your assumption is correct.
IDK about your ignition question.
Dean
My 80 Liqufire has an inertia disc attached to the flywheel. My 84 Liquifire has a ring gear, presumably to add electric starting. I think your assumption is correct.
IDK about your ignition question.
Dean
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Re: 82-up Liquifire engine question
Rob,
There are likely many cdi boxes that will work. I can tell you an Invader LTD has the same HSR retarding curve(27BTDC>8BTDC). The regular Invader has an advancing curve12BTDC>16BTDC. JD's HSR curve is identical to the LTDs. I have used a Polaris CDI box with 18 degrees of retard and it works had to set it at 31BTDC at idle. The CDI boxes may look all alike but the circuitry inside is what matters.
That 82 motor can use JDs HSR or Kaws HSR or even the stock Invaders. Validate the 'curve' that the Sprintfires CDI has and set the timing accordingly. For example of setting the timing for the JD HSR needs to be set 27 degrees BTDC at 3500rpm. Stock Invader is set 13 degrees at 3000.
The important piece to understand is setting a HSR at 13 degrees BTDC will not run worth a crap, but not hurt the motor. Conversely a Invader CDI set at 27 degrees will cause so much detonation you would shell the motor the first time under load you ran the sled. Make note at idle you are likely still safe to validate timing.
When I read your post again that sprintfire likely has a CDI curve of the stock Invader... If you put it on your liquifire you must change the timing to accommodate. You should retard the timing 14 degrees...
Hope this helps. Timing is pretty variable advancing or retarding ignitions. Some pro tuners use timing manipulation to control track spin, getting power to the ground at a controlled rate.
There are likely many cdi boxes that will work. I can tell you an Invader LTD has the same HSR retarding curve(27BTDC>8BTDC). The regular Invader has an advancing curve12BTDC>16BTDC. JD's HSR curve is identical to the LTDs. I have used a Polaris CDI box with 18 degrees of retard and it works had to set it at 31BTDC at idle. The CDI boxes may look all alike but the circuitry inside is what matters.
That 82 motor can use JDs HSR or Kaws HSR or even the stock Invaders. Validate the 'curve' that the Sprintfires CDI has and set the timing accordingly. For example of setting the timing for the JD HSR needs to be set 27 degrees BTDC at 3500rpm. Stock Invader is set 13 degrees at 3000.
The important piece to understand is setting a HSR at 13 degrees BTDC will not run worth a crap, but not hurt the motor. Conversely a Invader CDI set at 27 degrees will cause so much detonation you would shell the motor the first time under load you ran the sled. Make note at idle you are likely still safe to validate timing.
When I read your post again that sprintfire likely has a CDI curve of the stock Invader... If you put it on your liquifire you must change the timing to accommodate. You should retard the timing 14 degrees...
Hope this helps. Timing is pretty variable advancing or retarding ignitions. Some pro tuners use timing manipulation to control track spin, getting power to the ground at a controlled rate.