Originally Posted by Crash Test Dumy (Post 10658001)

I had no trouble at all breaking in this engine. It did take longer than other engines I've had. I didn't use the break-in shim, I wanted to, but the first head bolt I tried to remove I stripped the head hex. My fault, worn wrench.
I have a dual motor starter box, I'm sure that helped. I just made sure that the engine was hot enough before I started it. I had to drain the pipe after every tank as it was full of spent fuel and oil. I think the JP-4 is a good pipe for break-in because it is a gas hog.

Here's a link to the GTR 2 in a MBX6-T just before it dropped it's nuts (still rich) on our new layout. Not my best laps, still learning the new track with a new surface. I start out 3rd, take second for a little while, and end up 3rd of 3 or last. The other two guys are 2 of the fastest 3 at the club, I'm still learning!
http://www.youtube.com/watch?v=CV8PCfF5We4
Cheers
Brian

Originally Posted by rossham46 (Post 10662348)

Besides os what othet plugs are suitable?

Originally Posted by bigjayjay1 (Post 10663669)

Thanks Brian for the info good race buddy

Originally Posted by Crash Test Dumy (Post 10663350)

Hey Lee,

I just put a stock Mugen clutch on it for the break-in, with 3 .95 springs, I'd like to try a BUKU clutch next. I've got the M2C four shoe alum flywheel adjustable weight on two of my other engines, a Werks B6 pro and a Werks B2.
After she's fully broken-in, I may have to try a Werks carb and see if I notice any difference.

After trying the Werks 2013 pipe tomorrow, I also want to try using a progressive set of clutch springs, I'll start with a .9, then a .95, and then a 1.0. Trying to achieve a clutch that performs like the BUKU clutch.

BTW, I used a qt. of Powermaster Golden Break-in fuel, then the last three tanks I mixed in a third of Powermaster 30%, then half, then two thirds. It took about a little over a gallon to lose the cold pinch.
Cheers
Brian

Originally Posted by lee_double2000 (Post 10671744)

Thanks buddy

Originally Posted by Crash Test Dumy (Post 10663350)

Hey Lee,

I just put a stock Mugen clutch on it for the break-in, with 3 .95 springs, I'd like to try a BUKU clutch next. I've got the M2C four shoe alum flywheel adjustable weight on two of my other engines, a Werks B6 pro and a Werks B2.
After she's fully broken-in, I may have to try a Werks carb and see if I notice any difference.

After trying the Werks 2013 pipe tomorrow, I also want to try using a progressive set of clutch springs, I'll start with a .9, then a .95, and then a 1.0. Trying to achieve a clutch that performs like the BUKU clutch.

BTW, I used a qt. of Powermaster Golden Break-in fuel, then the last three tanks I mixed in a third of Powermaster 30%, then half, then two thirds. It took about a little over a gallon to lose the cold pinch.
Cheers
Brian

Originally Posted by bigjayjay1 (Post 10665420)

Im curious how these mills will react when modded im hearing good things jazz has mentioned good comments Regarding quality replacement parts are cheap also.

Originally Posted by Hobby Pro USA (Post 10677790)

Arrow-Racing Team Pro Modified GTR-21's now available at Hobby Pro USA.

Ryan Lopez, Corey Johnson, and Gene Hickerson have been testing this fully modified engine since December with excellent results. We feel that we have found the best possible combination of power and fuel economy for the Arrow Engines. We have tested the Losi RE-12, OS T-2060, and VP-Pro RS-4 pipes and they all work well with these mods. Fuel mileage ranges from 9-12 minutes with a big increase in all around power.

Originally Posted by Spads11 (Post 10677845)

Any chance to get one already owned modified? I have a new one sitting in the box!

Originally Posted by Hobby Pro USA (Post 10677790)

Arrow-Racing Team Pro Modified GTR-21's now available at Hobby Pro USA.

Ryan Lopez, Corey Johnson, and Gene Hickerson have been testing this fully modified engine since December with excellent results. We feel that we have found the best possible combination of power and fuel economy for the Arrow Engines. We have tested the Losi RE-12, OS T-2060, and VP-Pro RS-4 pipes and they all work well with these mods. Fuel mileage ranges from 9-12 minutes with a big increase in all around power.

Originally Posted by Mark Erce (Post 10679270)

are the new vp pro pipes now stronger? i remember the first one i bought it was very thin and didnt last to long.

Originally Posted by Mark Erce (Post 10679617)

cool thx Gene, i'll have to try one out!