68LikesOS SPEED B2102
01-05-2017, 03:34 AM
#76
[QUOTE=Frank L;14785682]2017!!
Damn that's a sweet paint job
Damn that's a sweet paint job
01-06-2017, 11:11 AM
#77
Where is the cheapest place to buy OS
01-06-2017, 12:17 PM
#78
try nemoracingusa.com the Bullitt B221 is the same as the speed 2102. or towerhobbies.com with a coupon... But Cheap and OS don't really go well together
01-06-2017, 01:26 PM
#80
01-11-2017, 07:52 AM
#84
01-22-2017, 10:21 PM
#87
Tech Initiate
If anyone would like to read a little feedback from my experience on this engine, here you are.
So I'm actually running the Bullitt B221 - I don't see a thread so far for it.
Just ran my first club race for the year yesterday.
*Break-in period*
This went quite easy, smooth, and shorter than I expected.
-Idled 2 tanks on the box
-Started slow figure of 8s and progressed up slightly more throttle from there each tank.
-Tried to not lean out much at all for the first few tanks, unless the engine cooled too quickly
*Race Environment*
~Variables~
OS P3 plug
Ambient temp outdoors 30deg C
7mm venturi as opposed to stock 6mm
So throughout the first qualifiers, the engine response was very smooth and I was quite impressed by the bottom end feel and punch.
The top-end was still running slightly on the rich side to be easy on the engine for the first time on the track.
After Each Qually, engine temps were within 120C - 130C, adjusted LSN and HSN between each heat for feel and temp management.
MAIN RACE - 30 Minutes
Put on a fresh Air Filter which seemed to richen up the mixture a bit.
Only leaned the HSN about 2min to regain some straight line speed, but still not peak speed.
I was pitting at 8min with still a 1min reserve left in the tank. - Bare in mind using a venturi that is 7mm as opposed to stock 6mm and slightly rich top-end.
At about the 20min mark in the race could feel the engine to start freeing up a bit and the bottom end really kicked in nicely.
Once the race ended, we temped the engine again and it was running at 124deg C
I was quite surprised it was as low as that. I was expecting about 130deg after a main event.
Later that evening once I got home, I just did a once over check on the engine.
I pulled out the glow plug, turned the flywheel by hand to feel if there was still any mechanical pinch.
There was no more obvious pinch anymore, but you could feel the minor vacuum when the piston moves within the sleeve
So there you have it, that's my account for this engine so far.
Maybe it gives other guys some insight as to what to expect from this power mill.
Some other guys that were testing their new engines elsewhere are reporting temps of about 130deg - 140 deg with a 6mm venturi and with more of a race tune on them.
Not sure of their exact run time, but they mentioned more than a typical expectation.
So I'm guessing around 10min or so at least.
Peace!
So I'm actually running the Bullitt B221 - I don't see a thread so far for it.
Just ran my first club race for the year yesterday.
*Break-in period*
This went quite easy, smooth, and shorter than I expected.
-Idled 2 tanks on the box
-Started slow figure of 8s and progressed up slightly more throttle from there each tank.
-Tried to not lean out much at all for the first few tanks, unless the engine cooled too quickly
*Race Environment*
~Variables~
OS P3 plug
Ambient temp outdoors 30deg C
7mm venturi as opposed to stock 6mm
So throughout the first qualifiers, the engine response was very smooth and I was quite impressed by the bottom end feel and punch.
The top-end was still running slightly on the rich side to be easy on the engine for the first time on the track.
After Each Qually, engine temps were within 120C - 130C, adjusted LSN and HSN between each heat for feel and temp management.
MAIN RACE - 30 Minutes
Put on a fresh Air Filter which seemed to richen up the mixture a bit.
Only leaned the HSN about 2min to regain some straight line speed, but still not peak speed.
I was pitting at 8min with still a 1min reserve left in the tank. - Bare in mind using a venturi that is 7mm as opposed to stock 6mm and slightly rich top-end.
At about the 20min mark in the race could feel the engine to start freeing up a bit and the bottom end really kicked in nicely.
Once the race ended, we temped the engine again and it was running at 124deg C
I was quite surprised it was as low as that. I was expecting about 130deg after a main event.
Later that evening once I got home, I just did a once over check on the engine.
I pulled out the glow plug, turned the flywheel by hand to feel if there was still any mechanical pinch.
There was no more obvious pinch anymore, but you could feel the minor vacuum when the piston moves within the sleeve
So there you have it, that's my account for this engine so far.
Maybe it gives other guys some insight as to what to expect from this power mill.
Some other guys that were testing their new engines elsewhere are reporting temps of about 130deg - 140 deg with a 6mm venturi and with more of a race tune on them.
Not sure of their exact run time, but they mentioned more than a typical expectation.
So I'm guessing around 10min or so at least.
Peace!
02-04-2017, 02:22 AM
#88
Tech Adept
02-15-2017, 07:40 AM
#90
Hello Jerm13,
The 2101 Cooling Head will not fit directly to the B2102 because the B2102 Underhead has a bigger diameter. You need to have B2101 Underhead as well if You want to use the B2101 Cooling Head.
Or if You could find a XZ-B Speed Spec III then You are able to fit it directly.
Cheers..
The 2101 Cooling Head will not fit directly to the B2102 because the B2102 Underhead has a bigger diameter. You need to have B2101 Underhead as well if You want to use the B2101 Cooling Head.
Or if You could find a XZ-B Speed Spec III then You are able to fit it directly.
Cheers..