You have to keep in mind that the 2072 comes with a REALLY LONG manifold.
You can change the characteristics of this pipe by fitting a short manifold like the Novarossi short manifold I think it's 41029.

I thought about that but couldn't find any other GO manifolds & wasn't sure how some other brands would fit, if they fit ok though then I might look into something shorter.
Comparing it to my brothers xs Reds manifold I can see how much bigger the GO item is, thanks.

I did have 2072 n 2103 go pipe but not yet tested with 2072 but 2103 sure give enuff bottom to clear jump, top end cant comment since i only tested a 25-30feet straight

broke one of these in this weekend and I've got to say its the best running engine I've had in a long time.I'm using the arrow pipe.I did have to use an O.S. carb because mine came with the wrong idle screw and wouldn't open the slide.so far I'm very impressed with the V4.time.will tell on the longevity.

Hello all!
I'm really interested in this engine! I'm thinking of going with 2 of these in mugen mbx7 and 7t. The pipe have is the nova 9901 the manifold is 41019. The carb I'm using is a nova also. Do you guys think this setup is gonna be okay for this engine?

9901 is for long stroke engine so i dont think it will suit, browse back there were feedback with this pipe. Try go 2072 or 2103.

Did anyone had the chance to compare these arrow engines with the alpha Lutz / Dragon ones ?

Quality is about the same, in fact I'm pretty sure they are made in the same place, although the distributors will deny deny deny this to the bitter end, the fact is these machines are very expensive and there can't be that many micro engine factories in one city. (Yes, the manufacturer adress is in the same city)

In terms of running they are opposites. Alpha big power down low, Arrow smooth down low like a VZ-B V-spec.
The latest Arrow versions have that DLC coating on the crank to make it last longer.

I have sold Go, Arrow, Alpha and now am the importer of Argus. I really do not see any similarities between the Alpha/Argus and the Arrow which is made by Go. I think the quality of the Alpha/Argus are better than the Arrow but the Arrow is a good engine. Alpha does not make a short stroke like the Arrow. The story I heard years ago was that someone that worked at Go split off and started Alpha.

Rex

Do you find the similarities with the different brand pipe as well? Imo some are same same butt ddifferent brand from taiwan

I've got a question. I just bought a new arrow gtr .21 v3. It comes with an extra shim in the box. The manual says to put the shim on the motor for the first 1-2 gallon or install it after the break-in process. This seems confusing to me? I searched through this forum and saw the most use the shim only at the break-in process and after that (when mech. pinch is almost gone) remove the extra shim and leave one silver and one copper/brass. Can someone verify this is the right thing to do? Thanks

Thats right.

Ok thanks

Anyone knows where I can find a crankshaft for the GTR Plus?

[QUOTE=patrickgarcia;13558905]Anyone knows where I can find a crankshaft for the GTR Plus?[/QUOTE

http://www.vpprousa.com/createaccoun...tail?showall=1