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Old 10-27-2007, 04:53 PM   #121
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I have a new in box 21 plus 5 . Bought it over a year ago dont race much now but what is the difference with this and the 21 plus 5k.
Thanks.
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Old 10-27-2007, 07:09 PM   #122
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the only real difference between the two is the block , the 21-5k has a seperate diverter in the block to send fuel straight into the vertical intake ports which they moved to the back side of the horizontal transfer port instead of them being nearest the exhaust port . other than that pretty much identical .
later , houston
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Old 10-27-2007, 08:26 PM   #123
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After talking to Rob over at Nitrohouse, he recommended that I pick up an 053 for it.

I will let you guys know how it goes this weekend
the 053 will give you abit more bottm end than the 086 but watch for your run time to drop

I'm running a HN 2047 with a short smooth header on a plus21-5T and so far this is my pick
I'm getting really good run time and the power is awesome through out the range, the JP-1 wasn't to bad but I found a flat spot in the midrange with it that i could get rid of

I'm soon to be trying a HN 2062 which I beleive the JP-4 is based on so I'll let you know how it goes

Adrian

Last edited by RETRO RC; 11-22-2007 at 02:09 AM.
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Old 10-28-2007, 06:26 AM   #124
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I've got Boca steel bearings in mine. I cant say anything about durability yet as the're still pretty fresh, but they fixed the leak from the front of the engine so that's always good.
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Old 10-28-2007, 09:18 AM   #125
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Originally Posted by RETRO RC View Post
the 053 will give you abit more top end than the 086 but watch for your run time to drop

I'm running a HN 2047 with a short smooth header on a plus21-5T and so far this is my pick
I'm getting really good run time and the power is awesome through out the range, the JP-1 wasn't to bad but I found a flat spot in the midrange with it that i could get rid of

I'm soon to be trying a HN 2062 which I beleive the JP-4 is based on so I'll let you know how it goes

Adrian
more top end from an 053 pipe ?? new one to me you dont get more top than an 086 version pipe
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Old 11-19-2007, 09:00 PM   #126
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more top end from an 053 pipe ?? new one to me you dont get more top than an 086 version pipe
yeh sorry late night typing should have read more bottom end

adrian
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Old 11-19-2007, 09:33 PM   #127
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remember what i told you about the tko bearings for the plus crank engines 14.5x26mm they are looser than the worn out ones you pull out of the engine !!!!
guys i've been running tko engine bearing for a couple of years now. the tolerances are set that way on purpose, these newer engine have a higher rpm limit therefore more heat is created in the bearing. everyone knows heat creates expansion if the bearings didn't have alittle play something would have to give. my murnan modified plus 21-5k has 4 gallons on it and the bearings no leaks no problems engine screams.

fyi: jp2 pipe with ofna header or the rb 98mm header. best powerband overall o'donnell 77t plug .7 mm shim good bottom strooonnngg midrange and pulls to infinity.
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Old 11-20-2007, 01:18 AM   #128
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I herd that these motors are know to have ghosting flame outs, Is this true?? i really dont have time to go through the the whole thread.
I have a new 21 plus and rather sell it than be stuck with it. Thanks..
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Old 11-20-2007, 02:20 AM   #129
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id get rid of it ay

IMO Novarossi's new .21 offroad plus series motor's are Junk at the moment nothing like the old P5X theres a thread on the new 367 with nothing but problems

the new nova bearing are nothing but problems to and not only for the off road motor there onroad motors are having bearing failure to but none of this ghostflaming out if u want a good cheap motor get the Picco or the Ninja but if budget not a worry then hands down get the SPEED
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Old 11-20-2007, 03:29 AM   #130
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I herd that these motors are know to have ghosting flame outs, Is this true?? i really dont have time to go through the the whole thread.
I have a new 21 plus and rather sell it than be stuck with it. Thanks..
Hang on to it mate, if your going to BDR on Sunday you can have a look at my 21-5 first hand. The ghost flames are related to the 367 engine, am experiencing this with my 367 at the moment, had a fix for it last race meet except it robbed me of a little top end. Back to the 21-5 , excellant engine, runs well with the 2015 pipe, JP3, sunday will be giving the new JP-4 pipe a go...

Bye the way M.D Jesse and I will have our GT2's on Sunday aswell, I will be running the new Novarossi N12ST...

cheers paul......
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Old 11-20-2007, 04:10 AM   #131
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I was having ghost flame outs till I went to a hotter plug. Now the engine runs beautifully.
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Old 11-20-2007, 05:54 AM   #132
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Have you guys tried the exhaust reducer on this engine? Also run a #6 glowplug and 7.5 or 8mm carb restrictor.
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Old 11-20-2007, 10:11 AM   #133
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Originally Posted by MadRacer View Post
I herd that these motors are know to have ghosting flame outs, Is this true?? i really dont have time to go through the the whole thread.
I have a new 21 plus and rather sell it than be stuck with it. Thanks..
send me a price .
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Old 11-20-2007, 11:18 AM   #134
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IDK, gang...

I'm in the final stages of breaking mine in, and it seems like it is a keeper for sure! I can tell this thing is going to be a beast on the track!

I think a bunch of folks are confusing the 367 with the 21-5 or 21-7 series. There may be some similarities in design, but it would seem to me that the flaws of the 367 aren't present in the 21-5 or 21-7 motors...

However, I've only a couple of tanks through mine, but so far, so good! It may grenade on me tomorrow, though!

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Old 11-20-2007, 07:52 PM   #135
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IDK, gang...

I'm in the final stages of breaking mine in, and it seems like it is a keeper for sure! I can tell this thing is going to be a beast on the track!

I think a bunch of folks are confusing the 367 with the 21-5 or 21-7 series. There may be some similarities in design, but it would seem to me that the flaws of the 367 aren't present in the 21-5 or 21-7 motors...

However, I've only a couple of tanks through mine, but so far, so good! It may grenade on me tomorrow, though!

get the boca rear main bearing before you start racing it or you will be sorry i am a big advocate for nova engines but the people they order a million dollars worth of bearings from at a time may not have the same quality standards !!!! trust me , and put the bearing in
later ,
monty
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