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Old 03-05-2009, 06:46 PM   #16
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a strong .21 will yield better lap times then a .28, not to mention the fuel economy you give up with a .28, all the newer truggies are geared for .21's. you just need a .21 with good bottom end power like the ebm5, ninja jx, v-spec those motors will give you as much power as the truck will handle and give you really good economy, tuned right you can get around 10 min run times with them
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Old 03-05-2009, 06:47 PM   #17
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its that time again? which motor? you should get this motor,works for me
sorry to the guy that started this thread but wow do these pop up.
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Old 03-05-2009, 07:40 PM   #18
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Add another vote for the EX-TECH.21 or .24 there both balistic
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Old 03-05-2009, 07:51 PM   #19
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Add another vote for the EX-TECH.21 or .24 there both balistic
i dont think you guys know anything!!!!!!!!!!!!!!!!!!!!!!
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Old 03-05-2009, 08:01 PM   #20
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everyone debates motor size,but no one ever gives the facts about weight,gears,carb.,exhaust,ect. so how can you say what motor is the best????
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Old 03-06-2009, 07:07 AM   #21
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Another vote for the EX-TECH. I have the .24 in my truggy and the .21 in my buggy these engines are great. Great run times easy to tune. I use the big boy pipe on both. Get the race prepped and the break in is already done for you. I would suggest running an additional 500cc then tune and race.
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Old 03-06-2009, 07:11 AM   #22
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I was planning on getting the grp .28 promo kit for my 8t 1.0, but you say the grp .21 would be fine? I run on a pretty tight track with one strait and some jumps out of corners and will run on some longer outdoor tracks this summer. Currently I am running a mach 427 wich is good power(11 to 12 min run times) but just want to get something else. .21 or .28 grp? Thanks


Grp makes a great motor the .21 is more than enough. If you have to have the .28 power you will sacrafice run time down in the 6-7 min range.
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Old 03-06-2009, 12:46 PM   #23
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Grp makes a great motor the .21 is more than enough. If you have to have the .28 power you will sacrafice run time down in the 6-7 min range.
I was looking at the truggy GRP promo .28 kit with the orange cooling head on ebay, the .21 promo kit for the buggy has the silver head, Is that the one I want? The .21 with the orange head is for the Rally right? Thanks for any help
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Old 03-06-2009, 12:50 PM   #24
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the silver head is a no tuned version, the rally version is more for european tracks, if you are looking for a .21 they make a .21 tuned buggy version its got the orange head also
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Old 03-06-2009, 12:53 PM   #25
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grp isnt very stabile at this time, i owned one it worked out well for me, there might not be a ton of support for the engine in the near future, its kind of shaky thats why you are seeing the price's go down on them, not because they are doing well
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Old 03-06-2009, 01:59 PM   #26
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my friend the pros use .21 engine
if you look @ the results always is .21
i have try everything
and o.s engines are the best

o.svspec its a very good engine for the price i like my vspec eb modified its other thing
the speed its the top of the line bit is more expensive


and the ninja jx.21 its the best of both worlds o.s made them for mugen thats on my truggy
better than a vspec similar power but whith o.s speed quality inside and 300 bucks no other engine @ this moment can compete whith the ninja
good luck buy vspec or ninja

i whant to try the new reedy and the team orion alpha engines but o.s power the best out there
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Old 03-06-2009, 02:17 PM   #27
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the silver head is a no tuned version, the rally version is more for european tracks, if you are looking for a .21 they make a .21 tuned buggy version its got the orange head also
Thanks, I do see the .21 tuned version w the orange head, just not with engine/pipe combo for the low price, like the .28/pipe combo I see. Guess I'll keep looking though
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Old 03-13-2009, 08:22 AM   #28
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http://www.amainhobbies.com/product_...ducts_id/23443

.21GRP combo.......
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Old 03-13-2009, 09:51 AM   #29
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A Clockwork Engines Jammin JPX .21.... More down low then any of the .24's or .25's, and more on top then any of the other .21's...runtimes of about 12 minutes..... Will be the fastest nastiest engine on your track !!!! I promise ya !
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