Hey Adam,

I dropped my engine in the mail on Tuesday, so you should be getting it anyday if not already. Let me know if you don't recieve in the next few days.

thanks,
Mark

I received it today actually.

Hey Adam,

I just recieved my three motors back from you in the mail today!

Ninja JX
O.S. Speed
Plus 4C

Thanks for breaking these in for me.

Cant wait to try these out ! Since I live in Colorado, the weather is more than a bit cold right now. I hope to get some run time on these before I go down to the Nitro Challenge in Feburary.

I really appreciate the individual attention you took on tuning these motors to meet my wants / needs.


To all the others that are wanting a competitive edge over the next guy...........

Go get yourself an AB modified setup ! Last year I ran an AB Modified ninja JX with great sucess, and what a great motor that was! This year I am adding three more modified motors to my arsenal. Go to his website and see the Dynos for yourself. His mods are backed with years of experience both on and off the track. While any others guys who modify motors can make "claims" that their motor does this or that, AB mods post actual dyno FACTS.

Thanks for the kind words Bob there much appreciated. Good luck with the up and coming season. Im sure you will do great!!

Hey Adam,

Do you remember how much fuel you might have ran through my Plus 4 ?

It was around 60 degrees today so I got to run about a quart through it just crusing around the hood. I think this motor will be a screamer ! Its still far from race ready, but I for sure see potential.

I took the motor apart and saw some of the changes you made to this motor. You filled the crank right ?

People say that this motor may be under powered for a truggy ? I have not even got to setting it up with the clutch properly. I think that they may need to an AB modified plus 4C !!!!!!!!

As for the speed, I ran a tank or so through it, I think it is ready for a race tune.

And the horsepower monster, I mean JX, I think that I will wait until racing in Colorado starts before I get to run this one

Adam,

I ran the V-spec this past weekend, it ran great and feels awesome. Small indoor track so I didn't really have a chance to let her scream, but the power band feels really good. Still planning on sending the JX to you, that motor just feels so good box stock hard to believe it can get much better.

Thanks,
Mark

Yep filled the crank on the +4. I ran it for about 2 hours or so on the bench to get a nice seat. The Novarossi engines are very TIGHT pinch engines and will take awhile for it to fully loosen up to full potential. If you are feeling the power now just wait till that baby loosens up to where you can get a full bore race tune on it... You're going to love it!

Very glad to hear your happy with work on the Vspec Mark. And on the JX .21 after im done with it your absolutely going to be in love!!

Hey Adam,

Are you still offering a discount on all your racing mods for the off season, $85 I think is was.

I have been trying to convince a few buddies to step up. Hopefully once it warms up and racing starts, they will see what they are missing

Hey Adam,

When going for maximum power the engine should be leaned out, but not so lean as to overheat the engine. In my speed car, I have the engine cooled by an small opening at the base of the windshield with ducting inside to get all of the air to the engine. I lean the engine out as far as I can but I’m wondering if I might not be getting all of the power it’s capable of.

My question’s regarding the difference between those two scenarios. The engine tucked inside the body lowers the coefficient of drag. If the engine was fully exposed, the air would be able to carry away a lot of heat. Could that engine be leaned out considerably more for more power? I’m second guessing the advantage of more streamlining vs more power.

Have you done any experimenting on how much more power an engine can make when the air can pull away more heat? And what would be the highest temp the engine can reach without damaging it?

Thanks!

With the short running that you are doing and the high speeds your are seeing i would go twards the streamlining "as areo at high speeds are detrimental as you know" and keep the engine tucked. With your small duct you should be able to get enough air in there to properly cool the engine enough for one high speed pass. Now if you were heat racing it would be a whole other story.... I would say expose that engine so it can dissipate that heat!

Look at the guys that are drag racing for example... There doing something similar to the speed runs. "1 pass top it out and shut it off" Your just going a little further There making 1 high speed high power pass and for weight reduction among other reasons will chop the cooling head all the way down. There not running for an extended period of time so they don't need the extra cooling or the extra weight. They want the heat to get up as quickly as possible for the engine to make its power and make that fast pass and shut it off. But since you are going a little further and seeing more load I would keep your cooling head on of course, just keep it tucked.

As far as temps every engine is a little different on what they want but i wouldn't let it get over 270s on the temp to make sure to not over heat the engine and cause damage.

Unsober you are correct sir.

BUT.............Of course there's a limit to the lean, I'm wondering if there is a limited return. Fer instance, two engines, one in car #1 with just a slot in the windshield crosses the line at 250 degrees with a particular fuel mixture. The second is in car #2 with the head exposed to the air, also crosses the line at 250 degrees, but because the head pulls heat out it would be at a leaner mixture (yes?) making more power.

The run takes about 12 seconds at full power. Both cars would leave the start at say....200 degrees. Car #1 (little air) would have to run richer to keep the temp from going over 250 degrees whereas car #2, with the head in the air, could run much leaner and have more power.

I'm wondering if there is a limit to the leaning where there isn't much difference in the power. Just thinking aloud......

There are so many variables here this is something that is obviously going to need some real world testing to find the best result for your setup.

Keep in touch and LMK what you find works best for you Gary. And of course feel free to bounce ideas of me.

Hey Adam,

Since its the off season for nitro, have you got to do any dyno testing on some of the newer motors?

Novarossi ?
Werks 5 port ?

Or have you seen or know anything about the O.S. .25. Not sure what advantages this motor may make