2LikesGo-Tech Engines Thread
06-28-2014 | 04:00 AM
Tech Master
Joined: Feb 2014
Posts: 1,042
From: Malaysia, Sabah
Byron 25%/9% fuel
Get rid of the .2mm shim. It's a break-in shim, and is only meant to be used for break-in to ease up on the compression (first 12 - 15 tanks).
Running it will be decreasing the compression ratio of the motor.
These motors have a reasonably low compression ratio compared to some others to start with, so you will be losing a lot of power and punch - especially running like this in conjunction with using 25% fuel.
If you want peak performance with reliability and a reasonable tuning window - run the stock factory .5mm shim stack, and run 30% fuel.
These motors love the higher nitro percentage, as it effectively raises the compression ratio, and they really perform.
The .5mm factory shimming is suitable for up to 30% fuel - you don't need to change anything (just get rid of that extra break-in shim).
Running it will be decreasing the compression ratio of the motor.
These motors have a reasonably low compression ratio compared to some others to start with, so you will be losing a lot of power and punch - especially running like this in conjunction with using 25% fuel.
If you want peak performance with reliability and a reasonable tuning window - run the stock factory .5mm shim stack, and run 30% fuel.
These motors love the higher nitro percentage, as it effectively raises the compression ratio, and they really perform.
The .5mm factory shimming is suitable for up to 30% fuel - you don't need to change anything (just get rid of that extra break-in shim).
06-28-2014 | 02:01 PM
Tech Elite
Joined: Nov 2007
Posts: 2,983
From: Auckland, New Zealand
Byrons 25/9 is a good fuel. Fine for run-in, as your running a little rich anyway.
If your not happy, get some Byrons 25/11 and use that for run-in only.
If you want even more performance, just move up to Byrons 30/9. The Taiwanese engines do like the 30%.
07-02-2014 | 08:05 AM
Tech Adept
Joined: Jan 2011
Posts: 175
07-02-2014 | 06:35 PM
Rex
07-05-2014 | 05:07 AM
Tech Master
Joined: Feb 2014
Posts: 1,042
From: Malaysia, Sabah
Is this enjine totally same as ARROW GTR PLUS? If so the arrow 2103 pipe will be good. Just purchase a unit, guess will get it in a month
Last edited by cczjordan; 07-05-2014 at 01:49 PM.
07-05-2014 | 07:04 AM
Have about half gallon thru my gxii plus. Taking it okay the track today to see how she does on the dirt. Engine is still tight, so I am sure it will be another 1/4 gallon until it fully breaks in. Just have to learn the tuning techniques with long low speed needle. I ave an original gxii gho with 3 needle carb. I will try the 2 needle carb first to give it a shot. Did run a few tanks in the street to get a basic tune on the engine. I live at 3500 feet. Will be heading to THUNDER ALLLEY close to sea level so I am sure I will need to richer the needles a hair.
07-05-2014 | 07:29 PM
Tech Master
Joined: Feb 2014
Posts: 1,042
From: Malaysia, Sabah
07-05-2014 | 08:41 PM
Tech Master
Joined: Feb 2014
Posts: 1,042
From: Malaysia, Sabah