Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

sj 60lx-or fire 60lx?

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Old 04-06-2009, 06:25 PM
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zero-cool
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Default sj 60lx-or fire 60lx?

getting ready to buy a jett 60lx for my viper. or a clipped wing dd.the sport jett 60lx is 350.00 but to get the fire 60lx with hedder and pipe is like almost 500.00 buy the time you add tax and shipping how much more rpm am i going to see with the fire 60.swinging a 8.8X9.0 prop?do you guys think its worth the extra 150.will i notice a difference in top speed?
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Old 04-06-2009, 08:58 PM
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Default RE: sj 60lx-or fire 60lx?


ORIGINAL: zero-cool

getting ready to buy a jett 60lx for my viper. or a clipped wing dd.the sport jett 60lx is 350.00 but to get the fire 60lx with hedder and pipe is like almost 500.00 buy the time you add tax and shipping how much more rpm am i going to see with the fire 60.swinging a 8.8X9.0 prop?do you guys think its worth the extra 150.will i notice a difference in top speed?
Any rear exhaust engine will result in a cleaner aerodynamic setup, so power notwithstanding your potential top speed is higher. A full pipe will have an advantage over a tuned muffler system; IIRC the potential difference in top end of these two is about 500rpm, but Bob27s may chime in with data right from the source.

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Old 04-06-2009, 09:09 PM
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Default RE: sj 60lx-or fire 60lx?

The side exhaust will work better on the Viper and be just fine on the DD. The difference in speed will be small. You might consider the black muffler.
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Old 04-07-2009, 02:42 PM
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Default RE: sj 60lx-or fire 60lx?

what is the black muffler?
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Old 04-07-2009, 06:15 PM
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Default RE: sj 60lx-or fire 60lx?


ORIGINAL: Mike Connor

The side exhaust will work better on the Viper and be just fine on the DD. The difference in speed will be small. You might consider the black muffler.

Yeah, that would be the way to go. You might even want to order it with both mufflers (still less expensive than the pipe).

Black muffler is the Q-500 racing muffler. Takes the engine into the 19,000 rpm range, but prop selection becomes more critical.

The standard 60LX setup with the gold muffler is probably all you will need for either application. Use an 8.8x8.5 prop on the Viper, or a standard 9x7/9x8 on the DD (to help with launching).

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Old 03-18-2010, 08:03 PM
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Default RE: sj 60lx-or fire 60lx?

I know this thread is old, but how does the black muffler affect idle and mid-range response?
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Old 03-20-2010, 11:43 AM
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Default RE: sj 60lx-or fire 60lx?

The black muffler does not change idle or midrange much. As long as the engine is propped correctly. It will stage a bit harder - more noticable pipe step.. so there will be a transition point in that midrange. As long as you are aware of it and know where it happens, no issues.

And just to clarify for others reading this thread,
The SJ-60LX and FIRE-60LX have been retired from the product line, and replaced by the new 56LX engine. Performs the same, just a bit more user friendly.
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Old 03-20-2010, 06:50 PM
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Default RE: sj 60lx-or fire 60lx?


ORIGINAL: bob27s

The black muffler does not change idle or midrange much. As long as the engine is propped correctly. It will stage a bit harder - more noticable pipe step.. so there will be a transition point in that midrange. As long as you are aware of it and know where it happens, no issues.

And just to clarify for others reading this thread,
The SJ-60LX and FIRE-60LX have been retired from the product line, and replaced by the new 56LX engine. Performs the same, just a bit more user friendly.

Why doesn't the website reflect that, since you mentioned the .56 going on two months ago? Does the jett website not get updated much?
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Old 03-20-2010, 07:58 PM
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Default RE: sj 60lx-or fire 60lx?

Bob posted a message on the Jett forum over 2-3 months ago.
either way, anyone wanting the 60LX will be directed to the 56LX once you order it.......Dub is so busy he doesn't have time to update the site.
i just got my 56LX a week ago and wow.........it's scary just to look at.
ran the BSE50 last week and it pulls more than advertised RPM's.

anyways, if an order for the 60LX is submitted, it will be updated to the 56LX.
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