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Old 01-04-2010, 07:03 PM   #16
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u cant go wrong with odonell motor
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Old 01-04-2010, 07:42 PM   #17
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well, i'm leaning more and more towards jpx28 or picco28
i'm also thinking that i cannot go wrong with one of these italian mills for about 150 (after discount)
anyone bought picco from tower lately?...how the head looks like?...as pictured or almost cilindrical (jpx, reedy style)
are these exactly the same engines?...cannot find manual for jpx to compare part numbers
anyone run jpx picco side by side?

what runtime i can expect from jpx or picco in D8T, 053, OD97T, 13/50, AKA CB, medium track, abt 120ft strait, lap times around 43-45s?...will a 14T CB improve driveability and/or mileage?
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Old 01-04-2010, 08:10 PM   #18
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i run an jpx21 in my jammin x2 truggy and IMO its sometimes to much power. i have hit a bump half way down a long straight away and it will hit the wing it was so much power. but i love the jpx 21 but the jpx28 is way to much power IMO. i have seen them on the track and they are just uncontrollable. they spin everywhere and you cannot get them to hook up because of the ballistic power. all picco 28's are that way IMO. i would defiantly go with the JPX21! we have had ours for 4+ gallons with no problem except front bearing started to leak a little. we also run 20% and run them on the rich side on the bottom just so they are so ballistic off the bottom. but great engine. i will be getting more of them in the future.

we run jp3 pipe with 13 teeth CB and we get 8-9 min a tank with jpx21. but the 053 will work good also. but if you go with a 28 you wont get that youll get less the two guys that ran the JPX28 were getting 5 min a tank and 6 if they took it easy.

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Old 01-04-2010, 09:20 PM   #19
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Yes the JPX 21 is a killer engine too.
Probably my next one
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Old 01-05-2010, 11:03 AM   #20
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thanks for your inputs guys
now i went down to jpx21 and k9

this article almost conviced me for 21:
http://www.axialracing.com/ftp/pdfs/xrc_feb-08.pdf

still 2-3 days left
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Old 01-05-2010, 03:17 PM   #21
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i have seen alot of people having trouble tuning RB engines. def with the higher end ones. i have seen people get so frustrated with tuning that the just crank it up and held it wide open till it blew. i had an c6 and it was fast as crap and i loved it but if the temp changed just a few degrees the tune was off it got so frustrating so dont even use it anymore. but i have also seen people swear by them and wont ever run anything different. but with our jpx21, it was easy to break in, and when we tuned it the first time we havent touched it except a hour here or there. we also run 20% in it and it will smoke just about any engine out there. the only thing i would do if you want to run 30% is to get another shim for it because everyone that i have seen that runs 30% without the shim their engine wont last but 2-3 gallons.
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Old 01-05-2010, 03:37 PM   #22
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what about the rb c5 is that hard to tune?
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Old 01-05-2010, 03:38 PM   #23
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not hard to tune but maybe hard to find ...it is a C6 now
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Old 01-05-2010, 03:41 PM   #24
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yea cause im buying one from a fellow, racer that still has pretty good compression, are they kind of touchy to tune? im gone to run it on my truggy
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Old 01-05-2010, 04:39 PM   #25
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is it turbo head? if so i would stay clear of it IMO. the standard plug RB engines seems to be great alot of people loved them and they seemed way easier to tune and stay tuned. but i have no clue about the c5 i havent seen anyone run one that i know of.
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Old 01-05-2010, 04:43 PM   #26
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i think the c5 is a standard head,yea i dont want to mess with a turbo head.
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Old 01-05-2010, 07:58 PM   #27
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all of my engines but two have been turbo heads and i love them but the RB engines with turbo head havent been my favorite and alot of RB lovers likes the no turbo head engines better from what i have heard at the track. the JPX21 is turbo head engine but it runs great and turbo plugs are easier to change in a hurry no more stupid washer.
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