R/C Tech Forums

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)

VPProUSA 07-02-2013 06:44 PM

Mid range - 2 turns out from flush at 2 oclock
Top 1.5-2.5 turns out from all the way in
Bottom 1/2-1 turn in from flush

stallen50 07-05-2013 10:00 AM

Just an update on the motor problems. The Carb was out of wack. Motor is running awesome. The 5port has a lot of power for buggy. Too much. Need to get a different pipe to tame it down. The motor is a beast

firecat 07-06-2013 12:36 PM

? will the gtr plusII piston,sleeve,rod combo work in an old mugen ninja B01A

stallen50 07-06-2013 01:14 PM


Originally Posted by firecat (Post 12322757)
? will the gtr plusII piston,sleeve,rod combo work in an old mugen ninja B01A

It should if its the older one. It also fits the v-spec and old speeds

rcmania74 07-06-2013 10:52 PM


Originally Posted by stallen50 (Post 12319727)
Just an update on the motor problems. The Carb was out of wack. Motor is running awesome. The 5port has a lot of power for buggy. Too much. Need to get a different pipe to tame it down. The motor is a beast

Best To.Stay With A 3 Port In Buggy?

VPProUSA 07-07-2013 05:51 AM


Originally Posted by rcmania74 (Post 12323990)
Best To.Stay With A 3 Port In Buggy?

Both of the arrow engines are smooth. But if the GTR-II Plus has too much power for your track, you can just pop put the P/S and install the older 3-port sleeve.

icanttype1342 07-07-2013 05:00 PM

I have a gtr plus that I broke in with about 7 tanks before putting a race tune on it. It runs great and idles all day long and is super smooth. Only problem I'm having is that I have it running around 245 and I'm only getting maybe 7 minutes a tank on buggy on a small track with only one 80 foot straight away on the back. Any suggestions??

VPProUSA 07-07-2013 05:06 PM


Originally Posted by icanttype1342 (Post 12325903)
I have a gtr plus that I broke in with about 7 tanks before putting a race tune on it. It runs great and idles all day long and is super smooth. Only problem I'm having is that I have it running around 245 and I'm only getting maybe 7 minutes a tank on buggy on a small track with only one 80 foot straight away on the back. Any suggestions??

Fuel mileage will improve with each tank run. After about 2 gallons, it will have the best mileage. 6-7 min a tank when breaking in is normal.

icanttype1342 07-07-2013 05:06 PM

With a p3 plug and os 2060 pipe.

icanttype1342 07-07-2013 05:09 PM


Originally Posted by VPProUSA (Post 12325928)
Fuel mileage will improve with each tank run. After about 2 gallons, it will have the best mileage. 6-7 min a tank when breaking in is normal.

Okay I figured it'd take a gallon or so to break in nice. I just wanted to be sure since this is my first run with these motors so far so good though!

rcmania74 07-10-2013 09:49 PM

Got My New Gtr.plus 5 Port Today For In My Truggy And.my New 3 Port And Pipe For buggy

rcmania74 07-11-2013 05:32 PM

Got The Newest Version Of The 3.Port ...Broke It In Today And To My Surprise It Broke In Way Faster Than My Older One And It Wasnt That Old But The New One Is Liking Breaking In An Os And Runs A Little Cooler too

rcmania74 07-14-2013 08:05 PM

Got A Full Gallon Through The New 3 Port... Runs Awesome And The Thing Has Excellent Super Tight Compression

icanttype1342 07-18-2013 10:30 AM

I have around a gallon on mine now. The engine feels great and has power for days running at 230-240....The runtime still isn't up there yet, but even with an extra pit stop I was still able to finish 4th in Nitro Buggy at last weekends Roar Region 2 series. Great motor for the money.

stallen50 07-18-2013 02:42 PM


Originally Posted by icanttype1342 (Post 12360329)
I have around a gallon on mine now. The engine feels great and has power for days running at 230-240....The runtime still isn't up there yet, but even with an extra pit stop I was still able to finish 4th in Nitro Buggy at last weekends Roar Region 2 series. Great motor for the money.

I would lean it up a bit those temp are all low. It will help with mileage. When I run it at about 260's.


All times are GMT -7. It is currently 09:20 PM.

Powered By: vBulletin v3.9.3.9 Patch Level 3
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.