Arrow Racing GTR .21 Engine Thread
#1097
Joined: Nov 2008
Posts: 4,583
I went up to the Midwest CRCRC on Thursday. The Arrow ran excellent and I was using the 2013 pipe. After trying a few different pipes, the 2013 to me was the best. Offers a totally different powerband. This track however was pretty fast and thursday night I took the engine off in favor for my Nitrotec because I'm not use to that kind of power and I was starting to over drive the car. Definately not the place or time to experiment. Now it's time to learn it.
#1099
Joined: Nov 2008
Posts: 4,583
#1103
Tech Regular
Joined: Apr 2012
Posts: 259
thanks for the info. after cleaning, inspecting then running again it appears to be weeping only. tune was fine.
#1104
NEW GTR Plus
I ran the new engine and I find it more powerful and most importantly the fuel efficiency is a double ++
It comes with a Low CG heatsink sits lower....very solid.....still uses a P3 plug.....tuning for low and mid speed needle as mentioned in previous posting but HSN a lot leaner and still sounds reasonable.........
I ran the new engine and I find it more powerful and most importantly the fuel efficiency is a double ++
It comes with a Low CG heatsink sits lower....very solid.....still uses a P3 plug.....tuning for low and mid speed needle as mentioned in previous posting but HSN a lot leaner and still sounds reasonable.........
#1105
NEW GTR Plus
I ran the new engine and I find it more powerful and most importantly the fuel efficiency is a double ++
It comes with a Low CG heatsink sits lower....very solid.....still uses a P3 plug.....tuning for low and mid speed needle as mentioned in previous posting but HSN a lot leaner and still sounds reasonable.........

I ran the new engine and I find it more powerful and most importantly the fuel efficiency is a double ++
It comes with a Low CG heatsink sits lower....very solid.....still uses a P3 plug.....tuning for low and mid speed needle as mentioned in previous posting but HSN a lot leaner and still sounds reasonable.........

#1106
Low - 1 turn in from flush
Top - depends on fuel,pipe,and manifold used
#1107
Thanks Gene. Motor feels real good so far and haven't turned a needle more than 1-2 hours from factory. I'm guessing this motor will like to run like the others at around 240-260. Turning it loose this weekend at the pro series.
#1108
Yes, I run mine around 275' when empty and broken in.
#1109
1. set it flush
2. richen it 2 full revolutions
3. set it at the 2 oclock position
is this correct? or do you mean 2hrs? just seems like alot of turning unless the needles are way off from the factory



