.21 vs .28

Old 03-05-2012, 04:02 PM
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Default .21 vs .28

Okay, I'm looking to upgrade my engine in my RC8T from the current os vg21 to something with more rip. I'm fine with keeping a 21 in there as that's what I've had for the past 6 months, and that's what I'm used to. I haven't really looked at .28's really so I don't know whats good. I'm also not oposed to having a 23 or 25 in there, I know some companies out there make some hot mills in those sizes too. Give me some ideas guys, and I'm looking at the 250-350 price range. The reason I'm looking to upgrade now is I went from buggy to truggy and I had the vg. I can wheel my truggy pretty well now and I am getting eatin up in the a main because the power just isn't there all over the track.


Sorry for posting in the wrong spot, thanks for the move.

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Old 03-05-2012, 04:23 PM
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Originally Posted by Flipside6900 View Post
Okay, I'm looking to upgrade my engine in my RC8T from the current os vg21 to something with more rip. I'm fine with keeping a 21 in there as that's what I've had for the past 6 months, and that's what I'm used to. I haven't really looked at .28's really so I don't know whats good. I'm also not oposed to having a 23 or 25 in there, I know some companies out there make some hot mills in those sizes too. Give me some ideas guys, and I'm looking at the 250-350 price range. The reason I'm looking to upgrade now is I went from buggy to truggy and I had the vg. I can wheel my truggy pretty well now and I am getting eatin up in the a main because the power just isn't there all over the track.

For $350 you can get a 21 that rips and will have much better fuel economy than a 28.
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Old 03-05-2012, 04:29 PM
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The good quality .25's and .28's generally have way too much power than you really need and the fuel economy suffers. For racing I would recommend to stick with a good quality .21 and you will have plenty of power and the advantage of good fuel economy.
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Old 03-05-2012, 04:41 PM
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+1 on the previous posts. For $350 you can get a .21 that will have more then enough power to push your truggy. I'd go with the Novarossi Bonito if I were you. All I'm hearing is good things about them and it definitly passes the eye and ear test from me. But if you're interested in a .28 I'd recommend the OS.28 xz. It gets decent fuel millage for .28 and has insane power.
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Old 03-05-2012, 04:50 PM
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An average .21 will be a lot better than a generic .28. It's just the way it is.
The .21's are much more developed and tuned to their maximum potential, due to the buggy racing.

Keep in mind that a good tuned pipe that matches the engine is equally as important as picking the right engine.
So you have to expect to put in at least $60, and maybe $150 on a tuned pipe, depending on which brand you get.
Obviously O.S. costs something like $400 but is good quality, then you have to buy their tuned pipe 2060 or 2090 which costs like $150.
So the cost on that is $550.

Then you have the new Go GXII-5RHO for which the matching tuned pipe is the Go 2072, which as a package comes out at like $350 or something.

And then the Novarossi alternative is probably something like plus4-btt or something along those lines of name (they're so hard to tell apart, one has ceramic bearing and one has steel etc), which costs $300 on sale certain places, and then the tuned pipe for that is about $100, which I think is either a 9901 or a 9853 depending on how you like it.

With all engines you usually have to do some maintainance during their life span.
Usually involves changing the ball bearings or rod. This will help prolong the life of the engine.

With some brands of engine the bearings that come with it are horrible quality, so a lot of people upgrade to 3rd party ceramic bearings quite quickly.

Last edited by Eivind E; 03-05-2012 at 05:09 PM.
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Old 03-05-2012, 05:10 PM
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Default .21 vs .28

Yeah I pretty much had my mind made up on the 21 over the larger displacement. The only thing over a 21 I was even considering is the os 25zx, but I was worried about the fuel milage. I know all the top guys usually run 21's and just run a different pipe from there buggy to there truggy. I do have associated servos and it's an 8TCE so I was considering the 121vr, or the new st version. Anybody have any good or bad experences with those two? I could always get a vspec and call it a day also.
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Old 03-05-2012, 05:14 PM
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I would shoot Monty a pm p://www.rctech.net/forum/offroad-nitro-engine-forum/285444-houstons-engine-service-h-e-s.html
he will hook you up
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Old 03-05-2012, 05:28 PM
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There's always that too, I was thinking about just spending a hundred or so on having my vg pinched and modded I know Those clockwork engines are amazing.
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Old 03-05-2012, 05:43 PM
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The reedy's are good now,

The older ones liked to run on the hot side 260-270 and didn't get that good of milage. The ST should be plenty in a Truggy

Some mills to consider and do not include proper pipe and header:

P5XLT- in stock form it's solid in a Truggy. Get a modded one and it's better
Fusion X7- Rossi based mill that has tons of top end and a simular bottom end to a P5.
Werks B5 or B5 Pro- Pretty cheap to get and work well in a Truggy. A lot of people like them
OS XZB (new Vspec)- pretty good and should be enough in Truggy for the most part.
Orion- There are a few different ones that are all good, but not sure of the Price. They do have a new 7 port that looks promising
Alpha's- Pretty cheap to get and though some don't like them, seem to be as good as some other mills out

Non .21's to maybe look at:
OS .25- Plenty of power on a Truggy and gets pretty good milage
Orion .23- I think they still make that one and it's supposed to have the power of a bigger mill while having the milage of a .21
Novarossi .25- One of the newest Nova's out. Don't know the price, but from what I saw of the one being ran at the NC, looked real good
Alpha- I think they have something like a .23 or .24 or something. Don't know much about it.

I'm sure there's other options to look at, but some of the above are the more popular ones.
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Old 03-05-2012, 05:44 PM
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for a .21 with the power you need IMHO clockworks is the way to go...Clockworks Racing Engines are amongst the most popular here in Edmonton Alberta Canada. i run an O.S .28XZ with proper pipe and setup and a clocked werks .21 with Neals setup(clockwork guy) will hang with me all over the track..what it loses in bottom end power it makes up for in top end speed but the sickest part of all is my O.S will run a maximum of 8-9 minutes and thats runnin it hot...clocked werks motors have made it to almost 14-15 minutes with 10 minute runtime being typical...and customer service is second to NONE!! idont even run his engines but everytime i throw an email his way he is right there to respond...check them out before you buy!!! its a definite must for any serious racer!! and clockworks fuel is the best i have ever ran (used to run odonnel, byrons, etc) its super consistant
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Old 03-05-2012, 06:39 PM
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By far the best motor for a truggy would be a Clockworks P5xlt. It rips in my buggy but would be perfectly at home in a truggy and cheaper than some of the other higher end factory motors. For $299 from Clockwork it is a really good deal! I would suggest that for it, plus the run times from it are insane!
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Old 03-05-2012, 09:16 PM
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the best for me is 25XZ... good power and good milage . i ran .28 528XR mod , .21 toro nero and .25 25XZ on truggy and the best is .25 ...is my opinion
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Old 03-05-2012, 11:38 PM
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I think the best value and power for money will be an Alpha .23 with 0801 pipe.. Even a bit cheaper than your budget maybe. Then spend the extra on a good clutch and some spare plugs..

I don't have the .23, but I have an Argus A52, which is powerful enough as a .21.., and is close to the Alpha .21.. What I like hearing about the Alpha .23 is that it's supposed to have a wicked top-end, in addition to the already major low-end power.. You also always hear about Alphas lasting for many gallons..
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Old 03-06-2012, 01:18 AM
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I run Alpha & Werks, both are great mills.

A Werks B5 with 2013/2058 will do the work without a problem, so will a Alpha S852/A852/A352, with a Alpha pipe, the nice thing about my Alpha is it has ran for 45 liters now, and still ripping.. I've never reached that with another engine.

Also Clockwork racing has very very nice mills, such a shame i don't live in the USA, otherwise i would run CRE(Clockwork Racing Engines) only..
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Old 03-06-2012, 07:47 AM
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If you want to talk motor give a PM to Neil at clockwork racing he will give you a honest feedback also match your needs to your track and area. He won't push you into a motor just good advise. You will get a million answers from everyone speak with a engine professional
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