Arrow Racing GTR .21 Engine Thread
04-19-2012 | 09:23 PM
#691
Tech Addict
Joined: Feb 2008
Posts: 712
i think it will if i remember these pipes if you want massivr bottom end i would go for the hong nor 2047 this pipe has the most bottom end i have ever come across and then the ae 2035 would be next.. Yes i like my hong nor pipes but that's only because they are reliable and do the job well and good value for money...
04-19-2012 | 10:38 PM
#692
04-20-2012 | 11:31 AM
#694
Arrow Racing is made by GO Engines in Taiwan at their Taichung factory.
Bullit Engines is made by OS Engines in Japan at their Nara plant.
XZ = Long stroke
VZ = Short stroke
Arrow is based on the short stroke VZ. The engine is a clone of the VZ-B V-Spec. It doesn't share anything with the VZ-B Speed, except for the fact it was designed with that style bottom end lubrication (the oiling hole was moved from the crank pin onto the rod to increase lifespan).
Bullit engines are based on the long stroke XZ engines. The 216 is essentially a XZ-B V-Spec while the 218 is essentially a XZ-B Speed.
Everything fits in a VZ-B.
The only thing that fits on a XZ-B is con rod, wrist pin clips, front and rear bearings, carb retainer, backplate screws, and the entire carb (just switch whole thing, I wouldn't mess with mixing Arrow carb parts with OS ones). That's it.
Crankcase, backplate, crank, piston, sleeve, head button, head gaskets, cooling head, and head bolts are all different.
Bullit Engines is made by OS Engines in Japan at their Nara plant.
XZ = Long stroke
VZ = Short stroke
Arrow is based on the short stroke VZ. The engine is a clone of the VZ-B V-Spec. It doesn't share anything with the VZ-B Speed, except for the fact it was designed with that style bottom end lubrication (the oiling hole was moved from the crank pin onto the rod to increase lifespan).
Bullit engines are based on the long stroke XZ engines. The 216 is essentially a XZ-B V-Spec while the 218 is essentially a XZ-B Speed.
Everything fits in a VZ-B.
The only thing that fits on a XZ-B is con rod, wrist pin clips, front and rear bearings, carb retainer, backplate screws, and the entire carb (just switch whole thing, I wouldn't mess with mixing Arrow carb parts with OS ones). That's it.
Crankcase, backplate, crank, piston, sleeve, head button, head gaskets, cooling head, and head bolts are all different.
what a great post! thank you for taking the time and explaining everything. i really appreciate it. i'll print this post and stick it in my binder. now i'll feel alot more confident answering questions when im at the track!
04-21-2012 | 05:56 PM
#697
Broke the gallon mark and the Arrow came alive today. Plenty of low and and nice top end. Initially I was worried it would be a little weak on top but she was a bit faster after loosening up.
Running on a fast high bite indoor track, it will do 10 minutes. I think this is the smoothest motor I've ran.
Very pleased thus far
Oh using an re11 pipe and Byron's 30/9.
Running on a fast high bite indoor track, it will do 10 minutes. I think this is the smoothest motor I've ran.
Very pleased thus far
Oh using an re11 pipe and Byron's 30/9.
04-21-2012 | 11:54 PM
#698
I just want to say one thing... the quality is up there on Arrow. I know saying GO freaks a lot of people out, since they lump it in with the no longer GO Tech engines. The truth is GO makes dozens of engines under different names. The JS stuff was great when I ran it. The new GO stuff is good too.
I've got the VZ Speed crank and it's got a lot of punch down low because of the timing. At higher RPM's I think it's hindered by not having a Speed sleeve.
04-22-2012 | 12:08 AM
#700
Tech Apprentice
Joined: Jan 2012
Posts: 84
I didn't know who manufacture arrow engine.
since but the others seems to follow arrows trend over the carb selection.
the arrow carb have good consistency.
I ran over 5 months and no hiccup.
try the speed crank, didn't like it.
since gone back what it is. I could forsake a little low end, compensated by smoothness.
but the high end, is a monster.
I like the arrow simply becos it is a simple 3 ports engine with blazing long straight speed.
since but the others seems to follow arrows trend over the carb selection.
the arrow carb have good consistency.
I ran over 5 months and no hiccup.
try the speed crank, didn't like it.
since gone back what it is. I could forsake a little low end, compensated by smoothness.
but the high end, is a monster.
I like the arrow simply becos it is a simple 3 ports engine with blazing long straight speed.
04-22-2012 | 04:08 PM
#704
Well I started break in today. I had to heat it to almost 300 degrees to get it to tun over but my carb got so hot I was vaporizing the fuel 
Got the heat more concentrated on the sleeve and managed to fire it up at about 260 degrees. Ran 1 tank on the ground in slow figure 8's at same steady low RPM's just to get some fuel through it and seat the bearings. ran through the whole tank with no hiccups.
Let it cool down and re-filled for tank 2 and got about halfway through it when my throttle servo died..I must have heated that to 300 degrees also
installing new servo now and will continue break in tuesday. Hoping to get about 10 tanks through it by Saturday and then race it Saturday night. I went with the Nova 9901 pipe to start with
Got the heat more concentrated on the sleeve and managed to fire it up at about 260 degrees. Ran 1 tank on the ground in slow figure 8's at same steady low RPM's just to get some fuel through it and seat the bearings. ran through the whole tank with no hiccups.
Let it cool down and re-filled for tank 2 and got about halfway through it when my throttle servo died..I must have heated that to 300 degrees also
installing new servo now and will continue break in tuesday. Hoping to get about 10 tanks through it by Saturday and then race it Saturday night. I went with the Nova 9901 pipe to start with
04-22-2012 | 05:44 PM
#705
Well I started break in today. I had to heat it to almost 300 degrees to get it to tun over but my carb got so hot I was vaporizing the fuel
Got the heat more concentrated on the sleeve and managed to fire it up at about 260 degrees. Ran 1 tank on the ground in slow figure 8's at same steady low RPM's just to get some fuel through it and seat the bearings. ran through the whole tank with no hiccups.
Let it cool down and re-filled for tank 2 and got about halfway through it when my throttle servo died..I must have heated that to 300 degrees also
installing new servo now and will continue break in tuesday. Hoping to get about 10 tanks through it by Saturday and then race it Saturday night. I went with the Nova 9901 pipe to start with
Got the heat more concentrated on the sleeve and managed to fire it up at about 260 degrees. Ran 1 tank on the ground in slow figure 8's at same steady low RPM's just to get some fuel through it and seat the bearings. ran through the whole tank with no hiccups.
Let it cool down and re-filled for tank 2 and got about halfway through it when my throttle servo died..I must have heated that to 300 degrees also
installing new servo now and will continue break in tuesday. Hoping to get about 10 tanks through it by Saturday and then race it Saturday night. I went with the Nova 9901 pipe to start with