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R/C Tech Forums (https://www.rctech.net/forum/)
-   Offroad Nitro Engine Forum (https://www.rctech.net/forum/offroad-nitro-engine-forum-157/)
-   -   Arrow Racing GTR .21 Engine Thread (https://www.rctech.net/forum/offroad-nitro-engine-forum/461596-arrow-racing-gtr-21-engine-thread.html)

stallen50 02-15-2012 07:38 AM
Originally Posted by twitch_1 (Post 10331615)
Whats the power band like on this motor eg smooth or aggressive?????
power band is smooth but peppy.lol

stallen50 02-15-2012 07:40 AM
similar to the old os v-spec

twitch_1 02-15-2012 05:17 PM
Originally Posted by stallen50 (Post 10331666)
power band is smooth but peppy.lol
Originally Posted by stallen50 (Post 10331681)
similar to the old os v-spec
Ok thanks for that i never really drove the old v-spec much but have heard it's a little aggressive bottom end....

What would be a good pipe to runn on it i have a 2035 and a hong nor 2080, or would i need to get another pipe???????

stallen50 02-15-2012 07:05 PM
Originally Posted by twitch_1 (Post 10334186)
Ok thanks for that i never really drove the old v-spec much but have heard it's a little aggressive bottom end....

What would be a good pipe to runn on it i have a 2035 and a hong nor 2080, or would i need to get another pipe???????
2035 would be a good one to run. it would be a good all around pipe for u

pcage 02-15-2012 08:26 PM
power band is smooth. responsive engine.

twitch_1 02-16-2012 01:06 AM
Originally Posted by stallen50 (Post 10334725)
2035 would be a good one to run. it would be a good all around pipe for u
Originally Posted by pcage (Post 10335146)
power band is smooth. responsive engine.
Thanks guys i might have to keep this motor in mind....

randystang 02-17-2012 11:58 AM
plug
 
has anyone run it with an odonnell97 plug, i am going to try to get through the heat cycles at least with one. and then switch to p3 if necessary!

stallen50 02-17-2012 12:45 PM
yes you can run it with od97t plugs. i would suggest you get a p3 plug. as they tune kind of hard with odonnell plugs unless you can get the hot plugs

OoD1S 02-17-2012 05:44 PM
run P3's with this engine and you will have no problems, Use breakin shim for about 1 to 1.5 gals and then take out and re tune.

Engine is fast even with break in shim in.

Enjoy

rossham46 02-18-2012 03:19 PM
Can i use the os xzb con rod
In the arrow gtr?

pcage 02-20-2012 02:30 AM
I am afraid it doesn't fit. XZB is long stroke. Arrow is short stroke.

Rsickles 02-20-2012 02:43 AM
Originally Posted by rossham46 (Post 10347375)
Can i use the os xzb con rod
In the arrow gtr?
Yes, it'll work.

Originally Posted by pcage (Post 10353831)
I am afraid it doesn't fit. XZB is long stroke. Arrow is short stroke.
The stroke is determined by the crank. The rod is the identical length on VZ and XZ platforms. :tire:

Eivind E 02-20-2012 02:00 PM
Please disregard this message in it's entirety. I was mistaken.

John. 02-20-2012 10:05 PM
Originally Posted by Eivind E (Post 10356355)
Made the mistake of accidentally buying a Gen 1 version of this engine from ebay seller "atomrc" who conveniently neglected to mention that the case on Gen1 was a dud, and that the o-rings were the wrong size on the carb.

So question is now, how do I get the updated Gen 2 case and o-rings?

I feel a bit cheated, the seller made sure to write "2011 version" but conveniently neglected to mention the flaws.
You would hope if it's a manufacturing defect that Arrow would cover it no matter where you purchased your new engine from.

Khanuen 02-20-2012 11:45 PM
Originally Posted by Eivind E (Post 10356355)
Made the mistake of accidentally buying a Gen 1 version of this engine from ebay seller "atomrc" who conveniently neglected to mention that the case on Gen1 was a dud, and that the o-rings were the wrong size on the carb.

So question is now, how do I get the updated Gen 2 case and o-rings?

I feel a bit cheated, the seller made sure to write "2011 version" but conveniently neglected to mention the flaws.
The Gen 2 carb isn't a work of art either. Rc willpower on ebay auctions O.S.xzb carbs and they consistently go for about $25. Thats probably cheaper than replacing the o-rings and you have a much smoother carb. Hobby pro sells the new case. I think the problem with the gen 1 case was the loose bearings but not all of them had the problem. Check and see if you've got a bad one.

Edit. Hobby pro also has the o-rings and for only $7.99. Case w/o bearings is $62.39 and with bearings is $89.99


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