that is still a substantial amount of scarring...if I seen that I would be questioning the airfilters I was using...... I have cranks with triple that runtime on them and showing next to zero markings...... OS filters FTW

as a rule of thumb, if i can feel the scratches with my thumbnail then I feel there is a serious issue...doesn't matter how old the engine is, dirt has passed into it, which would have had adverse effects on the engines running as well as lifespan...... If the debris is hard enough to scar the crank it is hard enough to do serious damage to the piston..... cranks are quite hard and its not easy to scratch them deep enough to feel with your thumbnail...any particle that nasty is not normal and should not be considered normal..... If I seen that on all my engines I would be questioning my airfilter strategy....

Interesting will have to kick these ....... Filters and give the OS ones a try.:tire:

The reason y I felt it was normal was because, in some cases, the pistons look absolutely flawless and hold compression for roughly 4~6 gallons that have been ran lean and beat to death like most racers engines. Definitely open to trying new filters though.

Oh I forgot to mention, I was into 1/8 racing 20 years ago. I had whatever Picco at the time and had no carb insert. For that reason, I ran my new Nova with NO carb insert.
Is this bad?
Do you adjust the idle screw with the insert or without?

Thanks

What's wrong with using a restrictor during break-in?

:lol: whatever you say man. dust can make DEEP scratches like that but a platinum coil can't.... you should spend less time behind the computer and more time in the real world running engines. i hope you people can read threw this BS, cause this dude is out there. NR engines are awesome from the factory there is no need to send your engine to some dude who lives in an egloo and can only run on a track about 5 months of the year. FYI your modded engines ARE over compressed and eat glow plugs like they're cheap snacks. i see it all the time and LOL.

we're 4 months into the year and i bet you haven't even glued a set of tires yet.....

The (public) personal attack isn't cool, especially from a fellow business owner.

I think its awesome that Joe is showing what a god guy he is ! he's a very classy person and I am sure many here will be proud to support his business and wave his banner !

no, whats not cool is selling people over compressed engines that eat glow plugs then blaming the problem on another company cause you can't figure out what you're doing.. Thats not cool! I'll keep quite and LOL till it effects me. then i put you on blast.

Larger Restrictior= more fuel/air. More fuel is good for break-in and will speed up process. Using no restrictor may make the tune inconsistent.

I can't imagine getting up as high as you for temps. I mean, I'm only barely a gallon into my Plus-4BTT and seems like it wants to scream at only 220.

I'd have to lean a lot more to get up into the 270-280 range. Not sure I would feel the need to go there at all. I guess mileage would be better but feels like the safety margin is nil at that temp

JJ

I have 2 cre engines, ninja bo2 with 5 gallons and a nova plus4 with 2 gallons. After the first half gallon of fuel I change the plug and then change the plug every so often like before a race day. I am on the 2nd plug in the nova. I use os p4's in both. In the past i noticed excessive aro messed with plugs but I've never had a plug randomly go out. In my 10 years nitro racing I've only seen the coil fall out a couple times, ussually only after something bad happended like broken fuel or pressure line which leaned out the engine and it overheated.

I don't really noticed excessive compression, they are both about the same and comparable with my stock xzb's. I've taken them apart and never seen signs of destination and I've never heard them ping.

the os plug in the nr will not seal correctly and lower the compression ratio. can't speak for his os's but the cw nr's ive seen are over compressed. with the right pipe setup the engine will over compress and eat plugs. i'm not talking about static compression, cold sitting on your pit table.

Okay this should be easy...who's Nova have you seen eat plugs ? I keep close contact with all my customers so be careful what you say as you will be help accountable in person by what nonsense you say here....

And since you say my engines are too compressed can you tell me where I have their compression set ? trapped/geometric ? And where would you suggest I put them ? do you even know how to measure compression ? can you tell us how far off stock my Clocked Nova's are ? surely for you to make such accusations you have some solid measurements to back it up ?

the problem is neal i dont think YOU know how to set a head correctly and i'm not the only engine guy who thinks so. trapped compression, or "swept volume" is not the only thing to consider when adjusting a head. your engines are setup on the edge and if you run them hard with a good pipe setup they eat plugs. anyway back to on topic,, blowing plugs causes scaring like that, yes dirt can but not what would pass through an air filter if you happen to neglect air filter maintenance. what you're saying sounds ridiculous. it would take a large amount of course dirt to do that kind of damage, like if you lost a filter cage or had a bad front bearing suck dirt, or had a glow plug coil go through your engine!