the 41021 manifold hurts top end quite a bit compared to a 41001... so if you want to go faster get rid of the 41021.... Looking at losing roughly 5000 RPM of usable powerband going from the 41021 as compared to the 41001....

A friend is going to lend me his 9901 to test it possibly on Monday :). Not sure I can get hold of the 41001 manifold easily there're not common where I am :(.

By the way I'm using a 6.5mm restrictor/venturi is that ok ?

thanks again

Fyi , i have NEVER once been underpowered using 2096 41021 setup ,EVER and no im not a slow guy , i dont "bash" my cars in a field , I RACE RC CARS

I have had issues with bearings in chassis that made it feel like the engine sucked ,put 4 or 5 engines in and they all did the same thing , replaced all bearings and voila , issue solved , felt free with no load buuuut .......

Viva la novarossi

truggy engine
 

Guys,
Looking for an engine for my truggy. Considering the p5xlt, or the clio. Pros, cons other suggestions. I have the standard p5xl in my buggy with no issues.
Thanks

With a P5xlt ?

The bearings have all been changed with the P5xlt and are regularly checked one by one every two weeks or so during the full disassembly for cleaning purposes. So I think I'm clear for this problem (gear mech is ok too everywhere and I'm using the std spur with a 13t pinion) .

I just don't understand why my engine doesn't sort of leap forward like the other guys do :(.

The lsn has been set 1/4 turn rich when the engine started to be a bit lean. It was actually set 1/8 leaner than what I have by the local pros but I found was then a bit of a pig to start.

I'm going to strip the clutch to double check the spring thickness.

Thank you again for all the inputs !

Right I double checked the clutch. The clutch bell is grooved, especially two thin grooves which don't seem to match anything. I first though it was the spring or something but nothing is in line with them (and no more than 0.2mm axial bell movement).
The springs are indeed 1mm thick and the aluminium shoes are not much worn either.

The engine only has 10liters (and always warmed up before starting it) I can feel compression . I can turn exactly 1/2turn freely before hitting compression and I can't turn it by hand.

The Clio is the updated version of the P5XLT, just as the XLT was the updated version to the P5. The Clio has the newer 3 needle carb and lightened head. Pretty much everything else is the same internally... So question is, $300 for the Clio or $190 for the P5...

What I did, was bought a New P5, had it massaged where I wanted it:sneaky:, installed cramics and put on a used Clio head. Came out to be right at the $300 mark. Running it with a 9901/ 41020 pipe and she holds her own against the OS speeds and Virtus motors around here:nod:

6.5 mm insert is going to kill your power no matter what pipe and header you run....Increase the size and you will see more power and definitely more RPM....7.5 mm or 8 mm will make a big difference and open that engine up and allow it to breath better.... Add the 41001 manifold to the 2096 and you should see more RPM as well....

Thanks for the info. I played with a few engines in the past and finally found the novarossi worked for me, but being out of the sport a few years did not want to start all over looking for a brand or model engine again.

Did you have Houston tweak it for you?

Lance at RC Renew.... He also did some work on my son's Alpha Dragon. Both are still going strong after a full season on them. Been really happy with them so far. No strange oddities, ghost flames or special things that have to be done.

I have not used HES but do hear a lot of good things about him and his engine program. I would not hesitate to have him work on one of my motors...

Amen Brutha

How does the 41001 compare to the 41020? Not on this specific engine, but just in general?

Today I tried the 2096 vs 9901 and I preferred the 9901 although I'll probably not buy it.

With the 2096 you sort of have a "lag" between the moment you pull the throttle and the engine reeving up. It's small but with the 9901 the engine feels way more connected to the car. It's instantaneous.
Funnily the 9901 was faster in the straight even against the 2096 + almost 1/2 leaner on the HSN. Weird as everybody agree on the oposite.
The 9901 is much louder.
Apart from that the lap time was pretty close and not worth me rushing to buy the 9901. Maybe when I'll have some spare money laying around...

Thanks again for all the help

Thats strange, which manifold?

Hsn too lean , lsn too rich ,,sounds like typical mistune on a novarossi

At least thats what it sounds like

If youre richening your lsn to get rid of a "lean bog" youre doing it wrong

Maybe your 2096 has an issue ,needs to be cleaned internally or broken internally? Something to that effect

That's odd, because "everyone" including myself like the 2096 way better.
9901 less topend, different bottom end.. I just don't like it much.

We tried on both my mate's BTT4 and my P5xlt with two separate 2096 so it's unlikely a faulty 2096 I think :(.
He retuned his BTT4 when he changed the can (going from 9901 to 2096) he had to lean quite a bit.
I didn't change much my tuning going from 2096 to the 9901 the top end was ok but it's true the LSN (?) was a tad too lean you could almost hear the engine bog but only at the end of the long straight when closing totally the throttle at full rpm. Wasn't sure to touch the lsn or hsn and as it was just a lend I didn't wan't to upset my original settings, maybe I should've been braver.

One thing I discovered yesterday is that I'm the only one with a 13t bell... everybody has a 14t on their car. It could help as the surface is very slippery (1/2" very thin dust on hard pack almost like flour).

Just richen hsn 1-2 hours will not harm d engine, but keep the idle gap n lsn correct

41001 vs 41021
 

On this engine the 41021 did pretty good in comparison...you can see the 41021 has a slight advantage in the early midrange, but the 41001 has more initial power , broader powerband and more peak HP....

http://i107.photobucket.com/albums/m...ps6uugnllw.jpg

And here is another graph from the same engine comparing the 9901, 2096 and a RB 2097..

http://i107.photobucket.com/albums/m...pscriio5m6.jpg

.

Can someone pointed out which color belong to which pipe, good analysis but not so good labelling

royal blue and green 2097

light and red 9901


purple and yellow 2096

that sudden drop at 32000rpm from the 9901 seems a little odd.. why is that?

Its even worse on the 41021 manifold..... But basically whats happening is the engine hits a point where the power drops off so much as that it no longer can accelerate the flywheel mass, or at least the acceleration slows substantially..... If the engine hit a specific RPM and was unable to climb any further the graph would read zero... As what the graph is essentially showing is rate of acceleration over time..zero acceleration gives a zero reading.... On this particular engine the 9901 doesn't rev out too well.... however on some other engines it runs like a banshee on the top end.... so it is what it is, the 9901 isn't the best suited to this engine, its not bad, but there are better obviously

Sooo cool facts Neal. Thanks a lot :nod:

I have to say that's quite interesting, I'm glad you posted these.
Have you done any other pipes, like Alpha, or 2058, 2060/2090 os pipes, etcetera? would be interesting to see the numbers and curves.

Going by this curve the 9901 is a total dud! Explains why I like the 2096 better.

So the green is the rb 2097 at the peak power point? If so, how would the 9886 fare against this?

Hahaha naa we got wat you said ;) but good one

9853 vs 9886 on a 41005 manifold
 

SO here is my modified Top Elite 5 being run on both a 9853 and a 9886...this engine loves the 41005 manifold...IMO this engine has one of the best overall powerbands that I have seen

http://i107.photobucket.com/albums/m...psdhcidxha.jpg

very tasty work Neal!! When is the new nitro shop thread going to be up if there is going to be one?

Any test results on the two new conical manifolds?
Matching the manifold on the pipe side seems to give good results. :tire:

Yep I tested the 41032 yesterday.... it didn't perform as well as the 41005 on this Elite 5 engine......The Elite 5 is like a P5 with a Team piston and more aggressive crank timing.....The 2096 also rocked on this engine too...

Do you know where you can get RB 2097 pipe?

I would be interested in seeing the graph on the Mito 4. That motor is only get more insane as I break it in.

So what would be a good pipe for a 421/821B?

Unless you are collecting them, I won't pay more than 150 for them, for 2 reasons, you can get a P5 for 215 that has a better rod better carb and better front bearing... abd 150 is a brand new price and being nice cause it's new...

WTF are you talking about. Reread the question.

lol.. i read price... no need to get nasty.. 9853 would be my choice