Borrow the Nova 9901 pipe and test again..

Wow Mark, that C-rod did arrive fast! That was just First Class shipping. Cool

I dont know anyone that has a 9901 pipe..... I heard that they were great though. Only pipes I have at the moment are the RE10, RE11 and a APlus 2081. Will be getting an APlus 0801 soon but cant really forsee investing in a Nova 9901 at the moment....

we tried the 0801 and it weird, like a flat spot in the middle

I spoke to the original owner and he didn't use a break in shim at all on the engine. It runs great though fuel economy is low likely due to the Pavidis pipe and 8mm restrictor. I will try 2060 and 6.5mm restrictor next time out.

+1

I run that 9901 pipe on my truggy with a novarossi p5 and i get anywhere between 12 and 15 mins a tank

I run the SH 2060 and a 6.5, getting just above 10, still running few hours fat so I am sure I can get 12.

I'm using a Mugen 2042 pipe with a 7mm reducer on my Arrow GTR-21 and getting 9:30 but the engine is still very tight. I expect to get 11-12 once it is fully broken in. I've never teched my Agama tank but I'm told it is undersize (about 121cc), so next week at the Nats I'll add a filter and fuel line and see what it can get.

It really is a good-looking engine. How would it compare to say an Argus or Alpha S852 or Werks B5 for power and ease of break-in and tuning? I don't care much about run-time.. I just want power and reliability..

The engine just came up for sale here in Germany, for a half-way acceptable price(though still %25 more than an Alpha S852 - €200 vs. €150...)

I run both the Alpha F850 and A852 plus the Arrow. The Alphas do have more power and better runtimes. Comparing the S852 to the Arrow though isnt exactly fair to the Arrow. The S852 is a 5 port engine and the Arrow is a 3 Port. Now if you compare Alphas RTR 3 Port to the Arrow they are really close. Both engines are reliable and easy to tune. The Alphas do have alot more mechanical pinch than the Arrow making for a more difficult break in. Though thats nothing a heat gun doesnt fix.

Over all....

Pure power output will go to the Alpha...
Break in will go to the Arrow for the less amount of pinch
Runtimes I have to put to the Alpha
Both the Alpha and Arrow tune easily
Lifespan is TBD. My F850 and Arrow are at 3 gallons and my A852 is at 1 gallon.

Is that a special edition head? I thought the motor comes in gun metal grey? I like the red better though

the arrow has just as much power as a alpha the only thing is its smoother so it doesnt seem like it which is what we call sneaky power and i think it also has as much pinch so it a tough break in with out a heat gun

Arrow sent red heads on the team driver's engines. Same engine, just different color head. I guess so the team guys can't sell the engine since they got them for free.

I do like the red but it fades after a while so gun metal should look better in the long run.

Its a tough break-in with a heat gun. I can't believe how much pinch and compression these motors have I'm at 3 gallon mark on my arrow and its very hard to turn over.

this engine is starting to get my attention. Especially since I already have 2050 and 2060 pipes