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Old 09-29-2009, 07:46 AM   #1
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Default Engine JP FX 21 B5T

i intend to buy this engine, but i can't find this engine's informations.
i don't know is it good for my buggy? FX21 and novarossi 421B or another nova engine which is better?
I heard little more durable JP nova, is that right?
which is durable,novarossi or JP racing?
If you were me, what would you choose?
and finally, what is different between white case and black case(JP FX21)?
http://www.jpracing.com/en/products/...on/fx21b5t.php

Thank you!

Last edited by AK_Nguyen; 09-29-2009 at 08:01 AM.
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Old 09-29-2009, 07:48 AM   #2
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Originally Posted by AK_Nguyen View Post
i intend to buy this engine, but i can't find this engine's informations.
i don't know is it good for my buggy? FX21 and novarossi 421B or another nova engine which is better?
I heard little more durable JP nova, is that right?
which is durable,novarossi or JP racing?
If you were me, what would you choose?
http://www.jpracing.com/en/products/...on/fx21b5t.php

Thank you!
I would just get a TUNED P4 NOVA -
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Old 09-29-2009, 08:07 AM   #3
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Quote:
Originally Posted by AK_Nguyen View Post
i intend to buy this engine, but i can't find this engine's informations.
i don't know is it good for my buggy? FX21 and novarossi 421B or another nova engine which is better?
I heard little more durable JP nova, is that right?
which is durable,novarossi or JP racing?
If you were me, what would you choose?
and finally, what is different between white case and black case(JP FX21)?
http://www.jpracing.com/en/products/...on/fx21b5t.php

Thank you!
If i'm not mistaken JP racing is very close to chapter 11...
The black cases are the tuned versions with the treated crank a bit like the O.S speed.
I've had that engine a couple of years back, it was good back then but by today's standards most engines get better fuel mileage, several are more powerful and Comparable engines cost a lot less! This engine shares many parts with the Original P5 and P5X, so it's a fairly old design...
not saying it's a bad engine but as token said, you would be better off with a Plus 4 in my opinion.
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Old 09-29-2009, 08:16 AM   #4
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Hix, is that engine not best?
i have two choices JP B5T white case( turbo) and novarossi 421B(turbo)?
Which is best for me?
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Old 09-29-2009, 08:46 AM   #5
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give me some advises, plz!
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Old 09-29-2009, 10:32 AM   #6
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JPB5t is an awesome engine along with the 421b. The JP will have more bottom than the 421 and might have a tick less rpms on top if any. I've run a lot of different engines over the years and the JPb5 I must say is one of the best engines I've ever had! The Stock silver case version had more bottom than the tuned black case version. The craftsmanship and quality of JP's stuff are second to none! Also, the old school P5's, which the B5's are based off of, Bearings lasted a lot longer than a lot of the newer P5x versions and the Plus versions. Hope this helps...
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Old 09-29-2009, 10:56 AM   #7
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I have had a JP B5 for a couple years now, it's had a bearing change and a couple rods put in it. But it literally has 20 gallon on it. I love this engine. My friends and I keep laughing about it, we say it has to die some time, but it hasn't shown any sign of it yet.
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Old 09-29-2009, 11:29 AM   #8
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hi there

i have own this engine 2 years ago. its a good engine but to expensive for that, what it can.


go and look to get newer engines than spend money this old engine.
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Old 09-29-2009, 11:12 PM   #9
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Hi thank iglu25, but i don't know with black case ( tuned version).
Does the engine with black case work better than silver case? is that right?

Quote:
Originally Posted by kd2777 View Post
I have had a JP B5 for a couple years now, it's had a bearing change and a couple rods put in it. But it literally has 20 gallon on it. I love this engine. My friends and I keep laughing about it, we say it has to die some time, but it hasn't shown any sign of it yet.
You said that you had 20 gallon on JX21 B5T, is that right?
And with 20 gallon, around 60 litres, is the engine good condition and tight?

And one more thing, JX 21 B8T with 8 ports, so With more 3 ports,is this engine stronger B5T? How much different? alot? or little?

Because this engine is not cheap so i wanna know well about this!

Last edited by AK_Nguyen; 09-29-2009 at 11:23 PM.
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Old 09-29-2009, 11:53 PM   #10
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I have the JP B5 stocker w/standard head button, the silver case version. Yes I still run the engine today, it still has great compression and idles great. And yes it has at least 20 gallon on it, I'm sure that result isn't typical, but that has been my experience.

The couple B8s I've had dealings with (one mine one a friends) where both the black mod versions. I'm not sure if they where "over" worked on the internals or what, but both had no bottom end at all, and where very finicky to tune. I didn't like that engine at all and soon sold it. Neither where half the engine the stock nova 821 was.
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Old 09-30-2009, 12:01 AM   #11
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Quote:
Originally Posted by AK_Nguyen View Post
i intend to buy this engine, but i can't find this engine's informations.
i don't know is it good for my buggy? FX21 and novarossi 421B or another nova engine which is better?
I heard little more durable JP nova, is that right?
which is durable,novarossi or JP racing?
If you were me, what would you choose?
and finally, what is different between white case and black case(JP FX21)?
http://www.jpracing.com/en/products/...on/fx21b5t.php

Thank you!
Get a Nova Plus 4. Don't mess with JP. They are very hard to tune..

http://www.rc-toro.com/product_info....fc929aada20b00
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Old 09-30-2009, 02:07 PM   #12
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Originally Posted by silverM3 View Post
Get a Nova Plus 4. Don't mess with JP. They are very hard to tune..

http://www.rc-toro.com/product_info....fc929aada20b00
wow that's a great price for a plus 4.
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Old 09-30-2009, 05:20 PM   #13
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Quote:
Originally Posted by iglu25 View Post
JPB5t is an awesome engine along with the 421b. The JP will have more bottom than the 421 and might have a tick less rpms on top if any. I've run a lot of different engines over the years and the JPb5 I must say is one of the best engines I've ever had! The Stock silver case version had more bottom than the tuned black case version. The craftsmanship and quality of JP's stuff are second to none! Also, the old school P5's, which the B5's are based off of, Bearings lasted a lot longer than a lot of the newer P5x versions and the Plus versions. Hope this helps...
i can vouch that iglu25 hasd ran aaaaaallllloooooottttttt of different engines over the years


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HE HAD SOME RETARDED FAST ENGINES TOO


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Old 09-30-2009, 05:32 PM   #14
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wow that's a great price for a plus 4.
how they are doing that i dont know , they aren't making a penny on those
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Old 10-01-2009, 09:43 AM   #15
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Hi thank iglu25, but i don't know with black case ( tuned version).
Does the engine with black case work better than silver case? is that right?
I was saying go with the SILVER CASE version. More bore bottom, great top end, very easy to tune, and will last a long time. To date, I haven't had any engine last longer than that one!!!
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