At Dialed-RC Hobbies.

Thanks:tire:

I just modified an Atom for a guy, wow they have a ton of crank timing stock! More than any other engine I have seen, including on-road engines. I am curious what guys think of the powerband on these?

Rex

Crank timing on the Atom/Arrow/similar is huge. Similar to VZ-B Speed.
I don't know what would be the point of modifying them, there's no timing to be added, it's already maxed out.

I ran an Arrow a few years back and the powerband was very mellow, smooth delivery on the bottom end.

Engine took everything i threw at it all season. Every bit a smooth,fast and reliable as my 400 dollar fx. Both engines behaved almost identical all year. Guys cant beleive the combo price when they ask what the heck do i have in my buggy. And for 70. Bucks for a rebuild u cant beat it. Engine still has great compression as well. All i can say is it will not disappiont

Arrow and Atom really thrive on an OS carb.....

Right now the the engine is stupid cheap due to black friday sales im just going to get another one instead of a rebuild. 4 gals thru the last one and well its got no leaks and compresion is still awesome. So its a practice bullit. For under 200 for engine and pipe. You cant go wrong.

ATOM works on new 3 port, long stroke :)

First photo of a test engine

https://scontent-cdg2-1.xx.fbcdn.net...ca&oe=596233EB

Nice. Im simply amazed by the performance of this little guy. Easy to brake in and run. Fuel milliage is descent. Got about 3 gallions through mine right now and its still going strong.

Anymore info on the long stroke?

Correctly modifying engines goes way beyond crank induction timing. There are several factors that come into play (transfer / port timing, exhaust timing, case matching, etc). The
VZ-B speed did have a lot of induction timing but there was definitely room for improvement in other areas. When making the correct changes to an engine with a lot of induction timing it will result in a wider power curve, smoother transition and good milage.

Hopefully the ATOM will continue to be a solid engine. Not everyone can afford to purchase engines at $250-$600ea. It truly bothers me when people spend $130-$165 of their hard earned money on a budget engine and have issues with it. Thankfully there are a few decent budget engines on the market these days.

Get one and try it. I love mine.. I havent had any issues with it. Gene sets the MED Range needle before he ships it out.

I am a dealer for Ultimate engines, Bullitt engines and Fusion engines. I would not personally run an ATOM engine. I was noting that I'm glad to see a decent budget engine for those that can't spend $300+

The general consensus is most of the other factors are nowhere near as influencial.

Yes, many people will argue about what changes actually benefit the most. Does increased induction timing help? Yes, it certainly does. However, when the induction timing is advanced to a significant degree it can be more beneficial when other timing changes are correctly performed. If someone that is very much experienced with modifying engines only increases the induction timing (crank) but leaves everything else stock (out of box) they will not get as much overall performance vs correctly matching the entire engine throughout. The vast majority of people also do not know how important overall fitment is (piston to sleeve, sleeve to case, button to sleeve, bearings to case, crank to bearings, etc).

Back to the ATOM engine. I wouldn't mind checking out one of them. However, I am a dealer for other engine lines and they are my main focus. Again, I'm glad to see that the ATOM is a solid engine at a decent price.