Arrow Racing GTR .21 Engine Thread
10-12-2012 | 11:52 AM
#991
Tech Adept
Joined: Oct 2011
Posts: 189
From: norway
Heading to the track in the morning to break in my V3.
I took the carb apart and looked at all the neddles. I am starting with this:
Idle gap - .6mm
High - 2.5 out
Low - 1 turn in at noon
Mid - 2 turn out from flush at 2 o'clock
That looks like the best settings to me. I will report my results Mon.
I took the carb apart and looked at all the neddles. I am starting with this:
Idle gap - .6mm
High - 2.5 out
Low - 1 turn in at noon
Mid - 2 turn out from flush at 2 o'clock
That looks like the best settings to me. I will report my results Mon.
please post what altitude,humidity and temp also
10-14-2012 | 04:55 PM
#992
Tech Elite
Joined: Jan 2009
Posts: 2,005
From: Florida
Got to B&B at noon of Fri. Used heat gun to cycle engine to 250'F. Let cool down. Heated again to 250' and started with VP Racing break in fuel. Used Thunder Innovation heater and idled 1 tank. Kept temp at 200'F. Let cool. Repeated 2nd tank. Let cool. Heated again and started. Blimped throttle on and off entire tank with TI heater still on. Let cool. Heated again. Started and richened high needle 1 turn, opened full throttle so wheels were spinning slowly while I held a heat gun to block to keep it at 190'+ for entire tank. Let cool. Heated and started again and drove in street 1 tank with VP 25% fuel and put on race tune. Let cool. Heated 1 more time and put it on the track. Fine tuned each tank with no heat gun needed. Ended with these settings:
Idle .7mm
Mid range 2 turns out from flush at 2 o'clock
Low 1 turn in from flush at 2 o'clock
High 1 and 3/4 out from all the way in
7mm reducer
Temp 265'f
Humid, mid 80's
2060 pipe
P3 plug
Engine ran perfect and had almost half a tank after 5 min quals. Never flamed once and idled like a kitten.
Idle .7mm
Mid range 2 turns out from flush at 2 o'clock
Low 1 turn in from flush at 2 o'clock
High 1 and 3/4 out from all the way in
7mm reducer
Temp 265'f
Humid, mid 80's
2060 pipe
P3 plug
Engine ran perfect and had almost half a tank after 5 min quals. Never flamed once and idled like a kitten.
10-23-2012 | 05:59 AM
#999
Tech Elite
Joined: Jan 2009
Posts: 2,005
From: Florida
Got to B&B at noon of Fri. Used heat gun to cycle engine to 250'F. Let cool down. Heated again to 250' and started with VP Racing break in fuel. Used Thunder Innovation heater and idled 1 tank. Kept temp at 200'F. Let cool. Repeated 2nd tank. Let cool. Heated again and started. Blimped throttle on and off entire tank with TI heater still on. Let cool. Heated again. Started and richened high needle 1 turn, opened full throttle so wheels were spinning slowly while I held a heat gun to block to keep it at 190'+ for entire tank. Let cool. Heated and started again and drove in street 1 tank with VP 25% fuel and put on race tune. Let cool. Heated 1 more time and put it on the track. Fine tuned each tank with no heat gun needed. Ended with these settings:
Idle .7mm
Mid range 2 turns out from flush at 2 o'clock
Low 1 turn in from flush at 2 o'clock
High 1 and 3/4 out from all the way in
7mm reducer
Temp 265'f
Humid, mid 80's
2060 pipe
P3 plug
Engine ran perfect and had almost half a tank after 5 min quals. Never flamed once and idled like a kitten.
Idle .7mm
Mid range 2 turns out from flush at 2 o'clock
Low 1 turn in from flush at 2 o'clock
High 1 and 3/4 out from all the way in
7mm reducer
Temp 265'f
Humid, mid 80's
2060 pipe
P3 plug
Engine ran perfect and had almost half a tank after 5 min quals. Never flamed once and idled like a kitten.
11-02-2012 | 05:28 AM
#1004
Tech Master
iTrader: (18)
Joined: Jan 2004
Posts: 1,132
From: Texas
Got my new Arrow engine in yesterday, looks good, although this thing is SUPER tight, couldn't even really turn it over by hand with the flywheel on, are they all like this? Guess once I start the break in and heat up the head it will be easier to turn over and start? Lookin forward to see how she runs!
11-02-2012 | 05:35 AM
#1005
Got my new Arrow engine in yesterday, looks good, although this thing is SUPER tight, couldn't even really turn it over by hand with the flywheel on, are they all like this? Guess once I start the break in and heat up the head it will be easier to turn over and start? Lookin forward to see how she runs!
Every new engine is like this. Keep the engine out of the pinch zone until you are ready to start it. Heat it to 200 degrees before attempting to start....