1QwkSport2.5r

I'm considering the Jett 60lx for a current project and someone had said they thought the 60lx was replaced by the 56lx. Is there any truth to this?

ThumbSkull

My Feedback: (57)

Not according to http://jettengineering.com/
The current engines all end in zero.

fizzwater2

My Feedback: (61)

I read something similar somewhere - call Jett and ask.

ThumbSkull

My Feedback: (57)

OK, based on the dates at the bottom of each webpage on the Jett site, it doesn't look like he even has a webmaster, let alone someone who updates it on a regular basis.

vasek

My Feedback: (4)

yes, the 56LX is being sold as a substitute for the 60LX

bob27s

My Feedback: (19)

Hi,

Thanks for writing......

YEs, that is accurate. The 60LX has been discontinued, and replaced with the .56LX

My apologies, the website is a lightyear out of date. (my project, need to get it done)

The .56LX is the same size, weight, and performance as the 60LX. Very user friendly.... and amazing versitility on prop selection.

There are a few build projects in the extreme speed section that use the SJ-56LX ..... worth taking a look.

Sorry for the confusion!

Bob

bob27s

My Feedback: (19)

Yes,.. that would be me. Rebuilding the site from the bottom up. Should be rolled out in a few weeks. Way over due on this

1QwkSport2.5r

Thanks for the reply! I've heard rave reviews about the entire Jett lineup and when I went searching out a powerplant for my craft, I chalked it up to either a Jett or a Rossi and the final judgement is Jett's are lighter, and more powerful. Done deal. (I am building the craft to run a 10" prop - the base engine will be a Thunder Tiger .46 pro on a Jett stream muffler)

Two other side questions - why was the 60 replaced by the 56? and If I buy a Jett Stream muffler to run on my TT .46, will that same muffler bolt up to a side exhaust .56lx?

bob27s

My Feedback: (19)

The 56LX is just the new generation engine. It is based off the "longer stroke" racing engines... longer rod. Just performs a lot better all around.

The Jett-Stream muffler will turn at TT46 into a real animal. Amazing how the engine reacts. Good way to start.

The Jett and OS/TT type muffler bolt spacing is different. Jett matches ST and Webra. But jett-stream tuned mufflers are available for OS/TT and all other engines.

1QwkSport2.5r

I've heard some people gain 1500-2000rpm going from the stock TT muffler to a Jett stream. This bodes well for what I want it to do. If I went to the 56LX, I'd want a full wave tuned pipe on it anyway now that I think about it.

Thanks for your help.

vasek

My Feedback: (4)

IMHO there's no need for a long pipe with Jett engines. The tuned muffler is the "optimal" option if you consider full pipe weight & install. The engines run pretty well on the tuned muffler.

1QwkSport2.5r

I'd like to know the weight difference between a full-wave pipe and header vs. the jett stream and what the power gains are between the two. The nice thing with a full-wave pipe is you can tune the length to dial in max power whereas with a 1/4 wave muffler, you don't have any adjustability. That is, AFAIK. Since this engine would go on a boat and not a plane, I wouldn't have the "unloading" characteristic that planes have so I think a full-wave may be better to make up the lost RPMs... Maybe I'm overthinking this..

1QwkSport2.5r

I'm bumping this thread since I hadn't gotten a reply from my last post.. any thoughts?

vasek

My Feedback: (4)

Hi 1Q,
The 1/4 wave muffler has been tuned by Dub to a specific engine, you can't tune it better that that IMO!

1QwkSport2.5r

I know that - My main questions are whats the difference in performance between the 1/4 wave and full-wave as well as weight differences between the two. What I should have said was the 1/4 wave is pre-tuned instead of no adjustability.. I worded that sentence wrong.. (I didnt re-read what I wrote, sorry..)

1QwkSport2.5r

Nevermind on the last post. I'm pretty much going to plan on getting a Rear exhaust .56lx with a full wave pipe. I just need to know - is there a cost difference between the ABC or AAC versions? Can you turn the same RPMS with an AAC as you can with an ABC?

bob27s

My Feedback: (19)

performance from AAC and ABC are about the same. AAC tends to be lighter.

Typically AAC cost a little more.

Rear exhaust with a full pipe is the maximum performance. But keep in mind - RPM is relative to the load. You will have to decide a bit ahead of time what size prop you wish to run. The pipe will be tuned for an RPM range (fairly narrow on a full pipe). Once set up your prop selection has to keep the engine in that range to run its best.

Bob

1QwkSport2.5r

From what I have been reading about them, Jett recommends to run a 10x6 and anything larger in dia. will make them run hot and not perform as well. I was kinda planning around the 10x6-10x8 range for props - No larger than 10" diameter for sure. The boat it would go on is an outrigger design so the lower the CG is the better. The engine will be inverted to keep some of the weight lower. Running the full pipe on a rear exhaust will make balancing the hull much easier than a side exhaust engine and hopefully help with getting higher speeds.