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which of these?

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I'm with Olds, the silver one has a larger carb venturi for more top end.
 
Well, they do run "different" carbs and the losi one lists the venturi size, but the dynamite one doesn't.

Silver (green): http://www.horizonhobby.com/Products/Default.aspx?ProdID=LOSR1064
Gold: http://www.horizonhobby.com/Products/Default.aspx?ProdID=DYN0909

If you look at the parts explosions, many of the parts are different part numbers. The only ones that are the same are the main bearings and carb cinch assembly.

The con-rod for the losi branded engine is more knife edged than the mach version.

To be honest, I've heard/seen the muggy mach and LST2 mach both in LST2's and they do perform differently. The muggy mach seems to have more high end power and a greater RPM range than the LST2 mach. The LST2 mach seems to have a bit more punch in the very low end.
 
If your looking for an engine for your buggy, I would suggest a nice .21 the .21's are made to rev out, they can handle the rpm much better then the .28's and in some cases make more power as well.
A jammin jpx picco .21 would haul that buggy around better then all the engines listed. Just a thought.
 
Extreme RC Mods said:
If your looking for an engine for your buggy, I would suggest a nice .21 the .21's are made to rev out, they can handle the rpm much better then the .28's and in some cases make more power as well.
A jammin jpx picco .21 would haul that buggy around better then all the engines listed. Just a thought.
Click to expand...
I am going to have to say I am with you on this. Proven point by a friend and myself.....Ofna Jammin' CR X2 ProKit Buggy. Engine LRP Spec 3 .28 I think everyone will agree it is one of the most solid and powerful MT engines out there. Buggy has more torque and power than it knows what to do with. So much torque in fact that it does more time with lost traction than it does putting power to the ground. At the track it was competitive and off the line racing against a Kyosho 777 with a Novarossi .21. It was no match....nothing could keep up with it....until RPMs got up a bit and then the .21 started to walk away from the .28. Why? The .21s just put out more RPM with lower torque. All the torque of the LRP beast was just wasted. Now it is fun to drive, sure...nothing like a buggy that will drift. However not practical for racing applications.
 
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X3
Buggies need .21 bumpstart engines.
I run a Trinity .21 in my truggy, it's 3X fasrer than any roto/pullstart .28 and uses 40% less fuel doing it! I only know of a few good .28's for truggies/buggies. The O.S. 28 XZ makes tons of power, too much actually and can still get 8 minutes on 150cc's of fuel. the GRP Tuned .28 is right there with it. The Ninja .28 is insane, especially modded.
 
Here is a video of a modified OS .18 TZ in a revo, jpx picco .21 in a buggy and a picco P7R .21 in a truggy, none of these engines had over 1/3 gallon on them so they were still tight and have more power to gain once breakin is complete. Turn it up and listen to the rpm, no .28 is going to last long with revs like that, the driver of the buggy could hardly get over 3/4 throttle down the straight. A good .21 will chase down any .28 any day..... in a buggy.

[ame]http://s99.photobucket.com/albums/l291/purenitro/?action=view&current=winternats.flv[/ame]
 
I'd give my left nut to run on a track that well groomed! Any smoother and it might as well be pavement. Nice vid.
 
olds97_lss said:
Well, they do run "different" carbs and the losi one lists the venturi size, but the dynamite one doesn't.

Silver (green): http://www.horizonhobby.com/Products/Default.aspx?ProdID=LOSR1064
Gold: http://www.horizonhobby.com/Products/Default.aspx?ProdID=DYN0909

If you look at the parts explosions, many of the parts are different part numbers. The only ones that are the same are the main bearings and carb cinch assembly.

The con-rod for the losi branded engine is more knife edged than the mach version.

To be honest, I've heard/seen the muggy mach and LST2 mach both in LST2's and they do perform differently. The muggy mach seems to have more high end power and a greater RPM range than the LST2 mach. The LST2 mach seems to have a bit more punch in the very low end.
Click to expand...

:goodpost: Okay, if you say so, I'll take your word for it.....I believe you because I've never seen a Muggy Losi Mach 427 run, let alone in an LST2.:D But the carbs are both the same size and both have the same 8.5mm venturi.;):hehe::p:
Anyway, I really like the way the Dynamite 427 performs in my LST2 !:thumbup:
 

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