Very Cool, yes I am having good run times with both P4s in buggy and truggy, running 6.5 in both motors.

Bood to hear dave , hope the engines last you a long time

Hi Monty

hope all is well

Can you please tell me which venturi brands fit nova carbs? I want to pick a 6mm restrictor for some of my NR mills, but not sure which one to get and I can't find/afford the Nova one anyway (if there's such a thing). GRP? Werks? Losi?

Thanks for the help

Paul

Here is the 6mm Novarossi restrictor.

http://www.amainhobbies.com/product_...buretor-Insert

Yes - thanks - but backordered - funnily enough I didn't see it the first time around as I was searching for 6mm not 6.0mm...

thanks

Paul

do i need to add/remove a shime to run 25% in my new fms as i read somewhere they were shimmed for 30%

Monty, I took the engine apart and the piston and sleeve look like shiny metal with no buildup of any kind. Just keep breaking it in on the track running it how I have above 200 degrees?

hello, what setup would be best on my new +4c team? i am curently running 6.5mm venturi, should i get a 6.0mm?

And monty, sorry for not ordering that heater i asked about. It will have to wait a bit, but i will get it from you later =)

Hello Monty,
I'm new here and the 1/8th scale. I bought a JP B5n that has a new p/s in it. My question is, I had just bought a gallon of O'Donnell 20% race fuel before I bought the JP so I started the break in process with it. Will it hurt anything to switch to 30%? I will be getting the 30 soon as I have another motor to break in also.
Also, I need to order that dynamite gasket set that comes with two silicone gaskets and the springs for the header to motor and header to pipe.
Thanks a bunch for the info in this thread, learning a TON from everyone!!
Thanks,
Mike

Hi.

What fuel are you running?

I'm a little surprised, that the Byron fuel doesn't burn clean - there are build up on the piston and the combustion camber. On the other hand, I'll guess that is because of the castor oil

Well this past weekend I was at a race with Monty and he had told me about times were people have broke-in their engines at too cold of a temp and some type of schalack builds up between the piston and sleeve actually making the pinch tighter and taking longer to break-in. ( If I remember the conversation right) My Nova + 4 is still in the break-in period. I just wanted to let him know I don't believe this is happening with my engine at all.

They are but running a little less nitro content and leaving the shimming will not hurt a thing and actually extend the runtime a bit . Might lack a little low end power but it will run just fine

Good to hear , thanks for the update Joe , those new fully machined pistons are taking quite a while to break in I have been noticing

There will be a little better mileage to be had with the 6 over the 6.5mm
No worries on the heater Martin , happy motorin'

If the b5 is as it came new it only has .7mm shimming , I would recommend bumping it up to .8mm before starting the run in process unless u are going to use 20% for break in .

It will not hurt anything to switch from 20% to 30% but make sure the engine is properly shimmed for the nitro percentage you choose to run

Byrons fuels does have more castor than most every other fuel on the market , they also have a lube package that no one else has


Nothing wrong with a little carbon build up on your piston

Thanks Monty,
I'll have to check with the PO on what shims are in it bit I would think that its shimmed for 30%. One more question, is this JP a good motor? I think that it is a Nova based motor and what I CAN find on it people say they rip. Don't know yet as still breaking it in and waiting for servos for the truggy and buggy, hurry up mailman!
Thanks,
Mike

Yes the jp b5n is a very nice engine , they were a lot of different crank timing specs on those engines so just depends on which one you have that depicts how it will perform .

Use a 6.5mm in truck and a 5.5mm in buggy

Monty

Check in the mail priority sent yesterday.

Thanks

Jon