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Old 02-20-2006, 01:53 AM   #1
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Default What 1/8th off road motor??

Hey guys, my Nova P5 has expired early and i was wondering what suggestions you have on any alternative motors to get. I can pretty much get a new motor for the same price as a rebuild and just want to get your suggestions on what to do, stick with the P5 or something else.

Thanks.
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Old 02-20-2006, 06:49 AM   #2
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O.S. V-Spec would be the way to go in my opinion. Or an rb ws7 2 x3. Both motors are wicked fast and reliable.And even though everyone talks about the bad bearing going bad on the V-Spec, I've never had a problem with it.
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Old 02-20-2006, 07:06 AM   #3
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The real question is "did you like your P5 ?" If so I would get another one in a heart beat ! If you need the powerful bottom end the P5 gives ,stay away from RB's other than the C5BB . The OS is a good engine as well ,if you get the JP mod version . If yo udo go with a stock version I would cahnge the bearings out for ceramic ones and then you will be garrenteed a good one ! And it will run for a long time . I haven't seem many other new engines yet this year , I do know that my NovaRossi 421BN is still running strong ,this is probably the smoothest most powerful engine I have ever run to date ,and I have run a pile of engines , none run as well as this one does ! I'm going to be quite sad when it gives up the fight one day . But I have a replacement so only time will tell . Good luck with your choice .
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Old 02-20-2006, 08:34 AM   #4
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If you liked the P5 but want more overall power you might try the Novarossi 21 Plus 5. A lot of guys are switching to it due to the smooth power and a lot of it. The P5 is still pretty good though. The OS Vspec has a lot of power and really good fuel mileage but the bearing issue makes it essentially a $350 engine once you change out the rear bearing.
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Old 02-21-2006, 03:09 AM   #5
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Thanks guys, I think that I will rebuild the P5. Has anyone heard much about the Plus 21-5 motor?
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Old 02-21-2006, 09:50 AM   #6
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I would sat try an RB, s7II or WS7 x3
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Old 02-21-2006, 10:15 AM   #7
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I like the collari b7. You can pick them up for around 250 and they run forever.
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Old 02-21-2006, 06:09 PM   #8
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I 2nd that Collari B7...wicked fast motor
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Old 02-21-2006, 08:25 PM   #9
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The Collari is deceptively fast. It is not that loud so it kind of sneaks up on you but you better have good brakes to stop at the end of a long straight!
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Old 02-23-2006, 08:17 PM   #10
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The Collari B7's are great motors, but from what I've seen, they don't get great mileage. I pitted for a guy running the B7 and he could get around 5-6.5 minutes out of it, which would be around 6-7 laps on most tracks.

The V-Spec I run is running 8 minutes consistently tuned a bit rich, and I have managed 11 minutes tuned lean in colder weather. I haven't had any rear bearing issues, but I have had issues with the conrod. During longer mains, the engine temps get higher than most engines and the conrod stretches out. This has happened to me about 2 times, but only seems to be an issue in how weather or when running excessively lean.
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Old 02-24-2006, 01:52 AM   #11
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Savage,

GREAT input on th V spec. I including 2 others have had conrod issues. Most have said it was because the bearing. Others say because high compression during break-in and temp.

My question is, do you just replace the conrod and keep running the engine. Have you thought about replacing the "bad" bearings (ceramic ) to fix the problem of conrod breaking.
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Old 02-24-2006, 08:43 AM   #12
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Most of the Collari 7 ports I have seen got 8-9 minutes of run time or slightly more than a P5. The 3 port will sometimes run 10 minutes!
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Old 03-01-2006, 03:17 AM   #13
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Default NOT A V-SPEC

Hi Guys ,
don't get a v spec . myne had less than 8 liters put through it and the block blew out a piece of metal the seize of your little finger nail out, just under the bearing. It was running at 110 c checked with my Raytech gun on the day.
Still fighting with OS in japan as they have claimed it's my fault. ( This is my 10 th nitro motor and all of them run really well ) I am taking the matter futher as this is a fault of workmanship.
Please NOTE ... crank is perfect, piston and sleave is good , rod is good .. This happened on the back straight . Will post pics soon
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Old 03-03-2006, 01:20 AM   #14
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there are too many variable's to go off when choosing a motor....what works for one person isnt gonna work for everyone...Everyone tunes different and everyone drives different.i have had just about every motor on the market and have formed my own opinions.

i have a v-spec....has ceramic bearings...very fast and hasnt failed me yet...i had a Odonnell s7 that had 18 gallons on it....then threw a rod. had a one gallon crono rs5. i could go on and on and on....you name it ive had it


my motors now last a lot longer now that i have a " process" after im done runnin for the day.

i love Rb...novarossi is second and os....there somewhere in there
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Old 03-03-2006, 02:13 AM   #15
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go with the thunder tiger 21PROBX-R its a crazy engine...i replaced it in the spot of my K4.6 in my savage and the K4.6 is a .28 andthis is a .21 and i can pop INSANE wheelies and get CRAZY top speed......i cant wait till iget my 3 speed i got a feeling im gona do a stoppie and flip over and brake my engine head lol
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