Anybody use the 41031? I understand it's a short conical header, but not quite as short as the 41032. I'm just wondering how the 41031 performs?

I've never ran it but the 41031 is basically the conical version of the 41021 and is supposed to have a little more bottom end.

Same thing with the 41032, its a conical version of the short 41019 square header. Makes a lot of power especially with a 9853 or 9886 and probably best for a high bite track or in truggy.

I run the Mito 4, 41031 conical with 2096, does not lack low or high end, as compared alongside other race engines. I think it is an upgrade over the 41021 on which it is based and worth running...

The square manifolds make quite a bit more power and RPM then do the curved manifolds...41032 smashes the 41033 just the same as a 41019 smashes a 41021........... 9853/9886 will substantially outperform the 2096 , and there will be no issue with run time, in fact the 9886 combo may even get better runtime considering your capped out looking for more top.... These 2 chamber pipes used to be the go to pipe till EFFRA forced a 3 chamber rule 10 years ago.........the rule was enacted because EFFRA wanted to slow the engines down and make every quieter.. Bad news is the 3 chamber pipes reduce power more effectively then they reduce noise......so basically racers everywhere are now running pipes thats primary purpose is to slow the engines down and reduce noise instead of pipes developed for performance and efficiency........ And no you don't increase mileage in a engine by choking off its exhaust so throw that concept out the window......

Thanks Neil.

Any time !

Also that Mizer insert will give you top end right comparable to a 7.5 mm insert but with better mileage...going to a 8 mm insert will increase top end but you will lose some mileage

Carb Inserts
 

Any reason to run the aluminum carb inserts over the plastic ones?

I can't find a 7.5mm alum insert. Any ideas as to where I can find one if alum is better?

Gaskets
 

What gaskets goes between the manifold and pipe (.21 offroad)? I can't find any info on that.

Thanks.

The same as what goes on the back of the motor.

not unless its one of those Novas that uses the red seal for the exhaust, those are different, you need the blue exhaust seal from Nova or any other 21 exhaust seal..

Not to quarrel but you can also throw lap times out he window with an over powered light switch type engine, and I don't just mean low end, all through the rpm range...

I don't know anything about that....I guess if someone buys a drag engine and sets it up with stock gearing on a slippery track there may be an issue....... but taking a stock or near stock Elite 5 and putting on a 9853/41001 isn't going to make it some tire spinning monster that uses its fuel tank in 5 minutes..... coming from a 2096/41021 its going to give the engine a stronger feel throughout the powerband with a noticeably better top end run out and about the same fuel mileage..on a track needing more power it may even get better mileage.... If your having trouble handling a stock Elite 5 with a 2096/41021 then you probably wont want to go to one of the better performing 2 chamber pipes....but if your like some guys and the 2096/41021 isn't enough for you then you can easily find more power with just a basic pipe and manifold swap....

The more air you flow, the more fuel you flow. There's no way around it.

But when the more airflow pipe set makes more power you pull less trigger limiting the airflow at the carb = same mileage. Simple solution for such a simple statement.

Not true on loop scavenging 2 strokes ! a huge amount of power is created by how efficiently the pipe can recycle mixture that has already blown thru the engine into the exhaust, power and efficiency are actually quite intertwined... the most powerful setups usually are using the fuel most efficiently ..

Hey, great on paper. But someone who is noodled and lacks throttle control won't pull less trigger.

So then you agree with Neil it's all about driver control.

The pipe restriction is for noise ordinance and fuel economy for the environment... people will say what they want, but having one less thing to focus on (trigger) while driving will make you a better driver...

Furthermore more US drivers are not bound to that rule during their Local events, such as roar Nats, but yet they will not run these "power" pipes on their engines, the cars are over powered to say the least and making the car drive able is the main objective...

World champion drivers use these pipes and smaller inserts, what wins on Sunday sell on Monday..

Well yes and no, it is a bit more complex than that.
When you modify an engine, and you do it right, you improve on the engines effiiency... That means more energy out with the same amount of energy in as before the modifications were done.

All I know is the same crap was said about the 2058 a few years back when I was recommending it on almost every engine...... a Few years later the 2058 is now accepted as one of the best all around go to pipes... Even when pro's try the 2058 they like it...so much so one even had his own pipe modeled after it..... RC racing is as much or more about fads then it is about anything else... 10 years ago these new pipes rules came it changed the pipes these racers run, to the point I doubt many of todays racers have even tried a 9886 or 9853........ Sure going to be interesting once they do ! and realize the 2058 was nothing next to the 9886/9853 ! all the things people like about the 2058 these pipes do even better !

Also there is no proof anywhere that the EFFRA legal pipes get better mileage, in fact I would suspect they get worse mileage....choking the exhaust is not a way to make any engine more efficient, choking the exhaust actually makes them work harder for the power they produce ! In fact many of the guys who have taken my pipe and header advice have found themselves getting better mileage along with the increased performance !

So if you guys want to run noise restriction pipes for no reason then so be it, but I am going to continue educating the racers about what is what and why these pipes are being recommended over the older pipes as it has nothing to do with anything but reducing noise, power and RPM !

Three chamber pipes have more return pulse/backpressure
Hsn setting needs to be leaner to gain power from these pipes
Leanerererer settings equates to more better fuel economy

They have more backpressure but less return pulse.. the increased back pressure causes a higher tank pressure and subsequent increase in fuel supply which requires a slight leaning of the needles so the mixture inside the engine remains the same even with the leaner needle settings......A 2 chamber recycles the spent fuel better and even with no more airflow passing thru the carb the 2 chamber makes more power hence it uses fuel more efficiently......Both setups doing equal work the 9886 will get better mileage then a 2096

leaning a engine i would add ,its good for champions and team drivers that they are only 1 or two per cent ,also leaning an engine would decrease the life span of the engine,.....with all the respect and agreed with maximo and huston i would say that the rules ,,some new rules are killing the adrenaline of rc nitro action ...... so i would prefere to lose a race ...instead of loosing the joy of the 9886 noise ,,the stupid reaction of big venturies even 9 mm venturies .:)

Leaning for crazy power n extra seconds for sponsored drivers are standard practice but if you willing to spend then just do it. I'm happy with good tune and lasted more gallons...

some rules are silly such as displacement limits.....like seriously does anyone believe a 32 would be a unfair advantage in a pro level offroad race ? .... ultimately the rule prevents the manufacturers from even attempting to develop a higher tech big displacement engine and sadly creating a larger gap between the racers and bashers then there already is...At a time when Nitro really needs some new development more then ever we have these rules that focus on noise restriction..Nitro is at a 10 year low and its still continually losing ground..I can name several areas where rule changes caused a reduction in race attendance , one of them by a simple name change of a class resulting in the catastrophic loss of a common bridge between bashers and racers . Same deal with dynamic adjustable pipes, there is a whole new technology that could be developed that current race rules wont allow due to potential noise issues... Being a former track owner I can say the only noise complaints we had were from our PA system, never from the engines.

exhaustvalves would be so awsome in theese engines

So would a reed valve. It'd be super interesting to see what the result would be.

yes a kind off exhaust valve ,,,a spring valve clape system can really makes the diference ,we were testing an inox pipe originally made for rc nitro boat which has a spring valve custom system ...so i mean by this way you can have a 3 chamber pipe at low rpms and at the same time a 2 chamber when it revs ;)

Quite poor is my guess, a rotary valve is by far better. Getting reed valves to work at the rpm these engines run would be next to impossible, and nothing would be gained. :tire:

To be honest... Yes, there are tracks under fire of strong envirement laws needing to make low noise or even no noise (only electrics) but I do believe that amount is very low. I also know tracks were forced to quit due other projects on that ground which wrongly used as an example what can happen when making too much noise.
The EFRA is such an organisation I think responsable for too much noise. If they really had accapted onlty the pipes comply to their noise limit we would have low noise pipes for years but sadly the homologation fee is more importand than the noise level.

Now the EFRA is working on a noise measurement and changed the naming "homologation" into "registration", so the responsabillity becomes with the driver to comply with the noise limits. I think that is also why an ENS is attracting more drivers than an European championship because the ENS is not hanging onto noise levels.

What pipe is this that Jerome Sartel is running?

http://www.rcmag.fr/reviews/course/t...el/sartel4.jpg

Rules are rules.... if you don't like the rules go play elsewhere... :-)

Looks like a 2041. Kinda' hard to tell, but if the stinger is perpendicular it's a 2041 Turbo. 2041's are very popular in Europe. One of the best all-round pipes ever IMO. I sold both mine, unfortunately...

Hard to tell exactly from that angle, but it could be a different Mielke pipe. Mielke-made though for sure..

41019 vs 41032
 

Is the mileage better with the 41019 header vs the 41032? If so, about how much better? I'm assuming the 41032 is more powerful being that it is conical.

What is this I hear about the double bend headers can seem to lean bog at low rpm?

both of them are for top end and open tracks .i wouldnt use 41032 for off road ,,,,untill now i use it for gt cars ,,,i have seen better results with 41001 and 41005 at buggy and trugy ,,41031 and 41021 are also good choices ,,,you have to make a test in a middle track with all to find your favorite

Looking to run nitro this summer and I'm wondering about some motors for my buggy. I used a 4btt a few years back and loved it. I'm curious whats the differences between the 4btt, mito and the virtus?

I run on a medium sized track so Im just looking for the best runtime possible.

i just picked up a nova nv21b, seems to share some internals with the bf but has a 15055 crank wich i cant find any info on. i dont expect much for what i paid but has anyone else run one, the box says square stroke i thought tbe 3 ports were all stroked like the p5s.
oh well $100 with a crappy tuned pipe cant really complain.
EDIT Pulled backplate and the crank is extemely simple and has a pullstart pin attached. will the 15007t crank fit?

Can anyone answer this with any detail, it seems difficult to get any info on the virtus and Mito line of offroad engines for some reason

Not really. They're all here. http://www.novarossi.it/2012/index.php

Peer down into the engine page itself and it'll give detail and specs

and great place to buy is: http://novarossidirect.com/

Specs
 

So can someone explain specs in general? I can't tell from specs if a motor is supposed to be a torque motor, speed motor or good all around, etc.