Originally Posted by houston

billy's looked pretty badass at the nitro challenge

Originally Posted by bigjayjay1

Noticed your dumping alot of stuff are you switching brands or unloading cause your a crazy buyer with plenty backup?

Originally Posted by Lille-bror

Plus4 issues:

A frind of my has a Plus4. 3 gallons on it and a lot of compression. He has never gotten any power out of it. His Killer9 has more power!!! If he tunes for the wellknown Novarossi power it sounds very lean.
25% nitro, 6,5 mm venturi, 41021, 9901, turbo head and 0,7 mm shims. Has has tried OD77T and Novarossi C5TGC + C6TGC glowplugs.

So he send it to me. Rust on the rear bearing and on the crankshaft

I cleaned up the crank and took all the other parts in one of my own crankcases.

Same result: With a prober tune, it has plenty of power but it sounds too lean. At the end of the straight it comes down to idlespeed as it shall, but after a few seconds at idle it starts to ding ding ding. Doesn't get too hot and it has a smooth and powerfull acceleration when you hit the throttle. No hessitation as it would if the tune was too lean. Changed the carburator and crank with no improvements. Can't see any leaks from backplate, front bearing, carburator, head and glowplug... The engine has been tested in two XRAY cars where any other engine runs perfect.

What can cause this problem?

Thanks gentlemen.

Originally Posted by houston

as long as top is rich enough it will not hurt the engine to have the lsn lean like that but......


Look at the head button , see if the plug threads in crooked the last thread and a half or so , look on the underside into the combustion bowl and check the plug
seal , if it isnt right you will notice the plug is touching the tapered seal are on one side and will have a gap on the other .

Seen that wreak some havoc on engine tuning

Originally Posted by Lille-bror

At last I was able to test the engine with a different combustion chamber, as Monty suggested. Guess what?
THAT WAS THE FAULT!
Ran the engine yesterday during free practise and today in a race. Perfect idle, acceleration, top, mileage and powerband.

What a joy to transform a "Monday" engine to a perfect race machine

Thank you Monty

Originally Posted by houston

its a long story about a friend who messed his life up and left his girl with debt , i am selling it all to help her out

i dont switch brands unless there is a verrrrrrrry good reason , i am very loyal and believe highly in the quality of all the products i run

especially NOVAROSSI made engines

Originally Posted by bigjayjay1

Wow awesome buddy you have a big heart always comes back ten fold in a positive way.

Originally Posted by beidle99

OS turbo plugs have a different taper then all other turbo plugs, once you use a OS turbo plug you have to stick with them or change out the button to use a Nova, RB, Werks, or O'Donnell plug again.

Originally Posted by guss2009

Hey guys if i use a O'donnell 97t plug on my plus 4c, can i still switch to the nova turbo plugs without changing the head button on it?

Originally Posted by beidle99

Your fine with the O'Donnell plugs. Only the OS plugs have a different taper that messes with the button.

Originally Posted by guss2009

Kool thanks. I wanted to make sure. I only carry nova, werks and odennell to the track.

Originally Posted by houston

is that a wins on sunday sells on monday reference ?

Originally Posted by Maximo

Werks are awesome in Nova's !

Originally Posted by Lille-bror

Doesn't sell a diamant! Actually I'm going to buy that engine (or what left of it ) for a few beers. Then I've a perfect engine for races for this season... That is until I perhaps shall race a COMPLETE new engine on the market (should be ready in a few month) nearly no one has been driven in the hole wide world... Time will tell