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-   -   Arrow Racing GTR .21 Engine Thread (https://www.rctech.net/forum/offroad-nitro-engine-forum/461596-arrow-racing-gtr-21-engine-thread.html)

mcnmugen 12-07-2012 12:00 AM

pipe recommendations
 

Originally Posted by RacePace (Post 11428998)
Hi all,
Just purchased this engine myself still waiting for it to come in the mail and was wondering what pipe you guys can recommend.
So far reading the thread I'm under the assumption that;
2035 for all round power and good runtime
RE11 for good bottom and top end
2060 and re11 the same?
2072?

Could anyone else recommend a pipe? I'm after heaps of bottom end good mid and high plus 10min or more runtime.
I'm running this engine with a 14t and m2c 4 shoe clutch.
Thanks

The OS 2060 is a good combination but i fell the best pipe ive found which ive tried a lot, is the Orion 2013 awesome torque thats controllable,midrange is spot on,and the top end good gosh is crazy. We have a super long straight away and it hangs right beside OS Speed. Love these engines and thats half the battle for perfect preparation is having confidence in your equipment! Just my 2 cents! Thanks again VP Pro! Curt

gofast072 12-07-2012 05:40 PM

i use a 2013 also, best pipe in my opinion

CHOAS 12-09-2012 12:28 PM


Originally Posted by CHOAS (Post 11501257)
Losi RE12 works good in buggy.Smooth bottom, strong mid and still breaths on top.

tested a few more pipes:
086 - little light on bottom end with soft clutch and steel flywheel but mid to top is great

P4 -good all around

2013 - good all around

this is a great buggy engine:nod:

Greg B 12-09-2012 01:06 PM

Breaking one in now. Sounding good.

spunkysandoval 12-09-2012 01:42 PM

Are you running the mod version?^

Greg B 12-13-2012 11:48 AM


Originally Posted by spunkysandoval (Post 11534121)
Are you running the mod version?^

No, the standard version. So far, all seems to be going well.
The engine has close to a gallon on it and is race-tuned. I did remove the thin copper shim and that brought it in much better. Good bottom, mid and top using Losi RE10 pipe.

Using VP-Pro P3 glow plug. Will idle all day long.

kaptain crash 12-13-2012 04:32 PM


Originally Posted by Greg B (Post 11551056)
No, the standard version. So far, all seems to be going well.
The engine has close to a gallon on it and is race-tuned. I did remove the thin copper shim and that brought it in much better. Good bottom, mid and top using Losi RE10 pipe.

Using VP-Pro P3 glow plug. Will idle all day long.

Able to make 10 mins. a tank yet?...

Greg B 12-13-2012 05:08 PM


Originally Posted by kaptain crash (Post 11552048)
Able to make 10 mins. a tank yet?...

I haven't really per say timed it yet but I would say so.

VPProUSA 01-05-2013 10:06 AM

The new Arrow GTR-21 V4 is in stock. It now comes with a purple head and a DLC Coated crankshaft for even longer pin wear.
http://www.vpprousa.com/components/c...uct/GTR-V3.jpg

VPProUSA 01-05-2013 10:06 AM

The crank is a hard anodized gun metal color.

The8ight 01-05-2013 10:27 PM

Is their anything differnt between the v3 and v4 besides the coated crankshaft and head?

VPProUSA 01-06-2013 12:26 PM


Originally Posted by The8ight (Post 11638145)
Is their anything differnt between the v3 and v4 besides the coated crankshaft and head?

nope.

xxxntwv 01-08-2013 02:44 PM

Got mine broke in this past weekend.Running on an re10 pipe this engine runs as good as the v-spec and still holding its pinch.On an indoor track I was getting anywhere from 11 to 12 minutes on a tank,and will most likely get better runtimes once its fully broke-in.

kaptain crash 01-08-2013 02:51 PM


Originally Posted by xxxntwv (Post 11650245)
Got mine broke in this past weekend.Running on an re10 pipe this engine runs as good as the v-spec and still holding its pinch.On an indoor track I was getting anywhere from 11 to 12 minutes on a tank,and will most likely get better runtimes once its fully broke-in.

That's some good news....:D...way to cold here and no indoor nitro tracks close by ...to break mine in and race it

Danny Teh 01-09-2013 06:10 AM

been running this motor for the past year. no mysterious flameout, super reliable, good performance and superb runtime.


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