JP FX21B-8T
05-31-2007, 05:32 AM
#1
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 :ø 14 mmCarburetor :ø 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
Technical Data FX 21 B-8TC. Capacity :3,49 ccBore :16,26 mmStroke :16,80 mmPorts :8 + 2 By passCrankshaft :ø 14 mmCarburetor :ø 8 mm + reducerGlow Plugs :TurboWeight :385 gr# FX 21 B-8T
Turbo Glow PlugTurbo Glow Plug for best performances.
8 ports ABC SleeveThis 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 CrankshaftThe 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 !
CarburetorThe 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
Last edited by Nitro$junkie; 05-31-2007 at 06:12 AM.
05-31-2007, 11:50 AM
#2
Tech Master
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
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
05-31-2007, 12:13 PM
#3
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.
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.
05-31-2007, 01:13 PM
#4
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
http://i3.photobucket.com/albums/y55...kincasepic.jpg
Vid
http://www.abmods.com/videos/buggy2.wmv
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
http://i3.photobucket.com/albums/y55...kincasepic.jpg
Vid
http://www.abmods.com/videos/buggy2.wmv
05-31-2007, 06:48 PM
#7
10 minutes on the AB.
05-31-2007, 11:06 PM
#8
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!
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!
Last edited by Colt4g63; 05-31-2007 at 11:24 PM.
05-31-2007, 11:26 PM
#10
Originally Posted by Nitro$junkie
cheers man that would be awesome 
you wouldnt have any dyno runs of either the JP or AB version
you wouldnt have any dyno runs of either the JP or AB version
PS. I found the vid with no music... uploading it now.
05-31-2007, 11:47 PM
#12
comparied to 12.9MB this version is gonna be heaps clearer 
thanks Colt
06-01-2007, 11:54 AM
#15
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
Get with me if u want one done up