OK, OK, I Will let the dog run loose.
1 question on the low-end mixture, When I come in from a high speed pass do I want the engine to go back to normal idle fast when I let off the gas or stay high for a little while? I have heard you want it to idle fast for about8-10 sec. before coming down to a normal idle.

the perfect but unpredictable tune has an instantaneous idle drop , very lean bottom and very small idle gap . flame outs every so often .

i recommend just a touch rich low end , maybe 2-3 sec. of a rich idle up . 8-10 sec. is a little too long .


i want you to tell me what you think of that engine . ;)

is there any raplacement front bearing for NOVA +4 (late 08 version) REAR BEARING can be found but the front one is like for 367 only, can you help find one thanks..

you can put any 7x19x6mm bearing in there , you will just need to put a shim behind the collet to space it out .


is your stock bearing leaking ?

monty

YUP it is leaking I have 2 shims behind the colet.

I will if I ever get to run the thing, the only time I got to race it it got everybodies attention. People kept stopping by my pit to look, I work next Saturday and off the next(11-7) and if it looks like rain I'm packing up and driving to Dixon's in Hazard Ky to race indoors

But to tell you how I like it....I don't like it at all.

I LOVE IT even rich and not fully broken in, It is a AWESOME engine:nod:

A front bearing doesn't have to be defective if it leaks.

A front bearing will allow oil by if you run your engine super rich . With all the extra oil in the crankcase and the pressurization that occurs during higher rpm's the extra oil that does not burn as well as the nitro/methanol in the fuel has to go somewhere . Lean the engine out a bit , especially the low end and see how it goes . Unless the seals have been damaged by a collet shim rubbing on the front bearing or dirt having been ingested into the engine , these new double sealed novarossi bearings don't leak under normal circumstances .

Monty

THATS EXACTLY WHAT HAPPEDNED to mine, SHIMS behind the colet rubs against the rubber seal and oil spilling off from there. monty please pm me your number thanks..

What exactly are the differences between the P5's and the plus 21-5's?

two completely different crank designs , the plus21-5 has a heavy crank such as the plus 21-5k ,plus 21-7bt , plus2 367 . it makes for a super smooth buggy engine , the p5x/xs/xl have a crank that creates a little more torque .they bot share the same port design though :tire:

So which one performs better in truggy?

the p5xl :nod: i do have a hotmods p5xs that will rock in a truggy :nod:

One more nova school question, will the 8 port p/s from the 421/821 fit/work in the plus engine case? I guess the plus cases have 14.5mm crank diameter?

yes you can uyse part #08038 in a standard plus21 or s21 case