Mark I have the Hudy tool. It works perfect on the Nova's. If you want to try it out, let me know.

Have you changed a bearing for a btt? I just need to know if the hudy kit is able to do that motor because I think the btt have diff size bearings

Yep, changed my CRE BTTS with no issue.

Thanks that's all I needed to know :nod: I just bought one

Nice! The 17011 front bearing has a raised inner race, so make sure you place a washer between the bearing and bearing cup to prevent you from smashing the race. Sounds weird, but look at it when you get the tool and it will make sense.

It takes a lil customzing or a machined washer that will only touch the outer race of the 17011 as it has an inner race that protrudes .3mm , seen allloooottt of messed up front 17011 because of this

I'm just going to send it to you lol

:lol:

Thats no prob bro

Just lmk

With the button head, which way does the arrow point? I took it off but didn't pay attention to the orientation.

Also, should there be movement of the flywheel when the piston is right at the top of the sleeve? With the heat sink and back plate off, I noticed a few mm movement left and right when the piston was stuck at the top. The pin on the crank that goes into the bottom of the rod seemed a bit loose.

Tdc is not where to check for rod/crankpin "slop" , thats normal

Towards exhaust but is a circle and will not hurt anything either way

[QUOTE=houston;12021255]Tdc is not where to check for rod/crankpin "slop" , thats normal

OK, thanks. How would you check the slop?

[QUOTE=RCNitro13;12021494]usually at the start of the compression stroke or get all technical and measure crankpin , under 4.92mm bad

what is the best fuel to run in a .21-4C engine? I normally use Byron 30% in my current engine, but noticed novarossi recommends 25%. I was thinking of 25% worlds blend

30% is fine. That all I run on my plus 4 btt. Can't go wrong with Byrons.

Perfect, Thanks!

i stripped the head button in my BTT. can the head button from the 21-4 work?

Yep

Hey guys,
I have an FMS that I've babied for a couple of years (had Ray tighten it up last fall). Use it in 1/8th Late Model.
Any ideas on a replacement piston ? (sleeve is ok). part numbers and good prices? Thanks in advance...

unfortunately pistons are not sold as a stand alone item... that being said if you can get someone with a piston from plus 4 you will be fine...

for part numbers talk to Monty he should be able to help you

must use #28028

what happened to it ?

if all is good Ray has resized MANY p/s sets more than once

Oh it was nothing to do with Ray's work. That's perfect. Lets just say I had an 'accident' doing what should be routine maintenance (replacing a rod). :cry: Completely gutted. Love this motor....

easy to scratch the piston:nod:I just changed out the rod on my roma took me a few clips to get it done right:sweat:

Oh it was worse than that :lol:

I was sitting at my workbench after replacing the rod/clips etc. slotted the piston back into the case and was getting ready to slide the sleeve back in when the piston dropped out, through my legs and onto the floor. I was sitting in one of those rolling desk chairs with five sets of wheels. I pushed myself away from the desk to find it, and the wheels rolled right over the piston (with my fat 220lbs of weight on it)....Pic attached...sob sob

Will this piston work?

ooh no
 

That is a sad story. That FMS is a nice engine for sure.

I think I have a brand new piston and sleeve for the FMS so you would need to give some time to check and I would be willing to let it go since I cant run that engine anymore......lemme know

Thanks bud. sent you a pm.

Oh no!I have dropped a toro Nero piston /rod on a concrete floor and dinged
The top part of the piston it ran rough after that lesson Learnt always put something soft down lol

yeah. it landed on carpet...and was fine...til I ran over it..:lol: :blush:

Hello, I have a Mugen Truggy, and let me know which engine do you recommend to buy, the Bonito or Roma?

Thanks. Best Regards.

hey guys...i have a bonito in my truggy with 2084 pipe and 41021 header. i just got it all recently and only have roughly 3/4 of a gallon through it and tried racing it at a big race this weekend. temping at around 265 and running very well and consistent but just doesn't have the top end power others are getting. can i expect it to come to life soon? i'm afraid to go leaner with only 3/4 of a gallon in it. i broke it in heat cycling method with vp powermaster 30% and added 200cc of castor oil to the gallon.

The majic of these engines seems to take place around the 2 gallon mark. 265 is still a bit conservative. Not sure about the 2084 pipe, but the 9886 or 2096 should help with the top end. You can also look at the 41001 header for more mid and top.

My Novas love the 9886/41001 combo and scream at 280-285. Have almost 6 gallons on a BTT and it shows no sign of premature wear.

the extra 6% oil is definitely going to dramatically reduce performance.....I wouldnt even try to push the top end till you go back to the regular formula.... All that oil will disrupt combustion and will end up tricking you into running overly lean in order to get it to clear itself out.... I would take it easy on top end running till you use up that fuel with the extra oil... If your trying to push performance all that extra oil will do more harm then good.... Also I Would use a 41001 manifold and a 9886 pipe.... The pipe header you run is too lazy for me on that engine.....

on race i day i did use normal vp 30% with no extra oil added. only other pipe setup i have right now is re12 and haven't tried it. i'm thinking once it breaks in more it'll come around

http://www.nitrorc.com/fuelws/oilonly.asp

A GOOD TOOL TO HAVE SIR

6%

NitroRC.com Custom Fuel Blend Recipe:

According to the figures you just gave us, your current fuel has, 30% nitro content and 9% oil content, leaving 61% methanol.

You have indicated that you wish to increase your oil content by 6% to a new total of 15%

In order to accomplish this you will simply need to add 8.8 ounces of castor/synthetic oil to your 128 ounces of fuel.

When you're done, you should end up with 136.8 ounces (1.07 gallons) of newly blended, custom fuel.


Custom Blend Results
Starting Nitro: 30% - - - - - - - - Ending Nitro: 28.1%

Starting Oil: 9% Add oz Oil: 8.8 Ending Oil: 15%

Starting Mthnl:61% - - - - - - - - Ending Mthnl: 56.9%

Whats the best pipe to go with the Novarossi Keep Off in a buggy?

seen Drake run it with the 9901 and 021 header and it was killer.. pipe depends on preference .. i like 2096 / 021 header on all my nova engines to date...

Thank you for the super quick response

Hey guys, I'm new to nitro and will be running a Losi buggy this season. I happened to pick up a Beat B4 Plus (I believe it's NVR21B4P, but there's nothing on the box that says that) from my LHS, but I don't know anything about it. I was initially going to pick up a P5, but was told this would give me a smoother powerband, and had a ceramic rear bearing. I can't find much info on this motor, but it looks like there's no ceramic bearing. Does it have a filled crank? Anything else I should know about it?

I'll be starting off with the 9901/41021 combo, and Losi's steel 4 shoe clutch with the standard configuration. I'm coming from electric 1/10 scale, and figured this would give me a pretty linear powerband.