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Old 05-31-2007, 06:32 AM   #1
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Default JP FX21B-8T

Im geting one of these engines and would like anyones opinion likes, dislike's, preformance, fuel Consumption, how easy to tune



Technical Data FX 21 B-8TC. Capacity :3,49 ccBore :16,26 mmStroke :16,80 mmPorts :8 + 2 By passCrankshaft :ř 14 mmCarburetor :ř 8 mm + reducerGlow Plugs :TurboWeight :385 gr# FX 21 B-8T


Turbo Glow Plug

Turbo Glow Plug for best performances.


8 ports ABC Sleeve

This 8 ports sleeve is revolutionary in the Off-Road engine’s range. The exhaust has two boosters in order to increase performances and manage the fuel consuption on the best.

The last generation conrod is lightened with 2 bushings. The piston is also pierced to decrease the piston temp.


Turbo Crankshaft

The modified and lightened crankshaft is filled with the special red putty which is positionned to improve the gas passage. In order to reduce the friction and the wear, the crankshaft is HardBlack coated.
The Turbo design of the crankshaft's head highly improves the engine power. For best performances !


Carburetor

The special Off-Road carb is made of plastic in order to avoid the «vapor-lock». As all FX Engines, it has a simple adjustment (1 screw). The adjustment is easier
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Last edited by Nitro$junkie; 05-31-2007 at 07:12 AM.
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Old 05-31-2007, 12:50 PM   #2
am
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If this is JP`s version of the Novarossi 421B i would buy the 5 port version instead.

The 421 was difficult to tune, did not hold a tune very good, average fuelconsuption, good bottom and top end.

I would rather buy a OS V-spec speed or an Rb C6BB
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Old 05-31-2007, 01:13 PM   #3
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These engines are awesome but are more suited to fast tracks.Anything technical and lots of jumps then the FX21B-5T is much better.
The 8T has more legs on the top but how long are you at high rpm on a track.If you do use it id suggest going to a 13t bell or even 12t bell.
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Old 05-31-2007, 02:13 PM   #4
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thats a Novarossi S821B. Ive seen a AB Mods one up against a JP Modded one like the one above, and the AB Mods had a little bit more power all around. It was also getting 10 minute runtimes on a big euro style track in a XRAY.
Pics
http://i3.photobucket.com/albums/y55...sleevepic3.jpg
http://i3.photobucket.com/albums/y55...sleevepic1.jpg
http://i3.photobucket.com/albums/y55...sleevepic2.jpg
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http://www.abmods.com/videos/buggy2.wmv
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Old 05-31-2007, 02:33 PM   #5
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thanks guy's much appreciated
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Old 05-31-2007, 03:03 PM   #6
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nice vid 2 is it posible to get it with out the music so i can hear the beast scream

BTW i love the Track its off guts!
were you geting 10min out of the AB or the JP
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Old 05-31-2007, 07:48 PM   #7
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10 minutes on the AB.
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Old 06-01-2007, 12:06 AM   #8
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I might still have the vid before i had German throw some music in it for me. I'll have to look around my PC. It was very hard for me to pin it full throttle as it was sooo loose and dry out there that day. But i did pin it a few times about midway down the backstretch It didnt help i had some old tires from a sportwerks RTR buggy on my Xray either... My modified 821 is deffinatly 1 of my top choices for a .21 great bottom mid and top end using a 53 pipe. And great fuel consumption to boot!
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Old 06-01-2007, 12:22 AM   #9
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cheers man that would be awesome
you wouldnt have any dyno runs of either the JP or AB version
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Old 06-01-2007, 12:26 AM   #10
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Quote:
Originally Posted by Nitro$junkie
cheers man that would be awesome
you wouldnt have any dyno runs of either the JP or AB version
No but i do have an X-Dyno being built as we speak. I will soon have alot of dyno results.

PS. I found the vid with no music... uploading it now.
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Old 06-01-2007, 12:29 AM   #11
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Nice
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Old 06-01-2007, 12:47 AM   #12
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Try this and see if it works.

Save as:
www.abmods.com/videos/821Xray.avi
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Old 06-01-2007, 01:05 AM   #13
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Wow 149MB comparied to 12.9MB this version is gonna be heaps clearer thanks Colt
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Old 06-01-2007, 06:47 AM   #14
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OMFG how is the thing its off its [email protected]#%ing head
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Old 06-01-2007, 12:54 PM   #15
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I love these engines after i do my modifications to them. Like i said its deffinatly one of my favorite all around .21s I also use it in my 5T truggy. It has PLENTY of power for it. Most everyone runs 21s out there. And the 821 puts it on em Get with me if u want one done up
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