Ok
 

Yeah. I honestly don't like the 9886 pipe., but I can tell you from experience the bent nova headers really make my engines sing on a 9853ss pipe. Plenty of torque and excellent top end, more than the short curved headers on that pipe. I like the 9853 because you never fall short on torque, but you can use the different length headers to tune for the top. For example, the 9853ss pipe with either the 41001 header, it's the medium but don't let that fool you on the top end performance, and I have not tried the 41019 short bent header, but I would imagine it would make lots of speed on the 9853 without sacrificing torque....or even the 9901 or whatever.

I have the Novarossi plus 21-4c and the 9901 & 9853 pipe with the 41021 and 41020 manifold. What's the best combo for this engine? I'm running it on my Losi 8ight 2.0 buggy.

9901 SS/41021 would be my choice.

9901/21 ftw

Definitely use the 41021 manifold.

Use the 9853 for much more low end with good mileage.

Use the 9901 to smooth things out a little with great mileage.

Or use the 2096 SS pipe and don't look back:nod:

Thanks for the fast respond guys. I also forgot to add that my local track has a lot of turns and 1 short straight away. Most of the turns has a triple jump and doubles. Hope this hope on which pipe is best. Here is a video of the track.

http://www.youtube.com/watch?v=0hkKdINeuNk

Nuff Said, same car as you, says he uses 9901 on all motors all tracks pretty much. Im sure if it is enough power for him, its prob def enough for us.

http://www.youtube.com/watch?v=qoWhB...layer_embedded

Hello, I have a Nova 4BTT in my MBX6 buggy, and would like to know that venturi is better, 6 or 6.5mm?

Thanks. Best Regards.

I use the BTTS which is the same engine other than yours has a steel front bearing and mine is ceramic. I use the 6mm venturi with 41021 manifold and 9901 pipe. I use odonnell spend blend fuel and with this set up i can get over 11 minutes of run time. If I use the 2084 pipe i can go 13 minutes..

Ok, I watched this video of Adam Drake talking about two engines. This is what was said in the video:

http://www.youtube.com/watch?v=qoWhB...layer_embedded

Buggy:
BTT engine
6mm restrictor
steel flywheel
4 shoe clutch (2 composite & 2 aluminum)
springs (composite shoe springs BLACK .036 25°)(aluminum shoe springs GREEN .036 30°)
9901 pipe
41021 header

Truggy
BONITO engine
7mm restrictor
aluminum flywheel
4 shoe clutch (2 composite & 2 aluminum)
springs (composite shoe springs GREEN .036 30°)(aluminum shoe springs GOLD .040 25°)
9901 pipe
41021 header

My questions are:
Lighter flywheel has what effect on motor?
Heavier flywheel has what effect on motor?
Lighter spring on composite shoe engages first, what advantage does this have?
Heavier spring on aluminum shoe engages later, what advantage does this have?

I run a RC8.2 with the same setup except a 6.5mm restrictor and a RC8 clutch with all aluminum shoes and 1.0x3 springs and my RC8T same except a 7.5mm restrictor 9853 pipe and a 41020 header and a RC8 clutch with all aluminum shoes and 1.0x3 springs...........

heavier flywheel = less wheel spin, smoother power band
lighter flywheel = quicker spool up
lighter springs = more drag less torque. clutch engages sooner...

Haha
 

HT P5 or Plus-4
Nova c6tgc plug
7mm venturi...
alluminum flywheel
Mugen hard clutch shoes, 1.0 springs..
novarossi 41001 manifold
novarossi 9853ss pipe.
25% Byrons 11% oil.
.70 head shimming...

I understand the thicker spring is more of a stall for engagement, but more specifically, composite shoe lighter spring engages first then the aluminum shoe is what he was talking about. Is it just a linear feeling pretty much?

I honestly would change the 9853 to 9901. The 9853 bottom end is just to insane where as the 9901 maintains good bottom end, but more controllable power.

did you richen your needles much going from a 6.5 to a 6mm venturi?
cheers

Cool
 

i tried the 9901 on the plus-4 and it was a bit too mild...Although it was in a test Durango, not the perfect test..

I might tryit on the p5...in the Mugen, but I like the way the p5 drives with the 9853, and the plus-4 really leans more toward p5 performance with the 9853....but I do have a 9901. I may just try it a little more....Maybe with the bent header it will pep it up.

I tested them back to back at mikes, last weekend and was getting a lot more wheelspin with the 9853, which was causing me to lose time. Thru the 9901 on, and there was more usable traction so times got better. Track was dusty though.

A small correction! Drake says uses 4BTT "S"

Best Regards.

which the only difference is a front ceramic

can you address my questions?

That's right. The front bearing and...a higher price!

Yeah
 

Different stuff for different styles and tracks. I like racing outdoor in dirt, not indoor clay....In dirt, you need the power....

you need to lean the needles as you have less air to the carb when you go from 6.5mm to 6mm

+1

I just bought an OS 5,5 mm venturi. Can wait to test it. Perfect fit in a Novarossi carburator :nod:

yes thats right I got it the wrong way around, last week I forgot to put a carb insert in and it was rich as:lol:

Wasn't it way too lean???? ;)

BTT.......ok, 6mm venturi.....too hard to tune compared to 6.5mm...geeze, went back to 6.5. :cry:

Thars what I was getting at earlier ;)

yessir, that's why I did it, thanks

Does anyone know what the stock restrictors are for the team p4 and the bonito?

When using a smaller venturi (6.5 to 6mm), you must open the needles, is that correct? How many "minutes" is necessary to open the needles?

Thanks. Best Regards.

they come with 6.5,7,7.5,8mm

i will istall the 8mm for you to use during initial break in , after that i would recommend starting with a 7mm

you should have to close/lean the mixture needles , probably around 2hrs on lsn , then adjust top n the track


remember that the smaller the restrictor the smaller the tuning window and higher the temps , adam runs his stuff about 270-290 most of the time , it is novarossi of course ;)

How to Tune by Jared Tebo
 

The audio isn't the greatest, but Tebo really helped me out with these vid's. :nod: Pass it on, knowledge is power.

PART 1: :nod: http://www.youtube.com/watch?v=iwzcW..._order&list=UL

PART 2: :nod: http://www.youtube.com/watch?v=8lM_B...eature=related

I learned a few things from watching Jared and Adrien tune at nationals , biggest improvement from tuning like they do is HUGE mileage increases , very lean lsn , little rich top

I'm very surprised that Nova still make the .28 and have not dropped it in favor of a .23/.24. I have some old school .28 here from my MT racing days the Nova .28 528XR modified and it is a animal... I know the Bonito is right up there with the power to pull a Truggy around, But having a look in the Novarossi site last night just surprised me that's all......

what I found interesting from the video is how they lean the lsn so there is little drop on the idle. Im going to try this because my tune has the idle dropping off after about 10-12 sec so Tebo would say its too rich on the lsn.

Monty - how much time gain did you see?

I tried tuning according to Saxton's "How To" video leaning the LSN 1st, then turning in the HSN. I then tried Tebo's method going HSN then LSN. This worked out better for me. My bottom was loading up and now I think I got it.

Tebo's video is about the same ad Bernard Durand From Racing Experiance, he has a novarossi video on vimeo. That is the exact same way I do my tune now