if anybody has any interest in a one of a kind (really) jp plus2 367 black case engine let me know /

seriously is one of a kind engine http://www.rctech.net/forum/5775862-post1.html

Monty I am haveing trouble with this new bf , it starts fine idle's then starts to rev higher and higher until it's out of control. I have pressure tested the tank,changed lines,sealed carb and back plate. Could I have gotten a new engine with a bad front seal. Carb is set at 3.75 hsn and 3 lns 1mm open, I only have 2 tanks of fuel though it.

Any thoughts of what might try would be great, not impressed with my first nova at all.

thanks

mine was doing the same thing and found out after much headache that the head was loose. I torqued the screws down and voila...perfect.

That was the problem I went back out and over the engine agian and found 1 of the head bolts was loose from the factory. Damm I feel like a newbe the one place I never thought to look. I just put 5 tanks though it over this afternoon runs great I take back my bad mojo about this engine. It has how ever ate the wheel on my ofna truggy box even after heating it up every time after a heat cycle.



thanks

your slide barrel is not closing all the way , check your linkage . if thats not it , it wouldn't be the front bearing , that does not create that much air leak . hell the on road engines have a metal shield in the front , there is no front seal . i have heard of a few sticky carbs on the bf engines but nothing that cant be remedied
if the head is that loose you will find that there will be a good load of fuel seapage from the underhead .

heat up the engine until it fires over fairly easy

Thanks for the info Houston. It's to bad you can't make the first stop, I was looking forward to meeting you, after many Pm's. I can't wait for ricks engine to break loose and get turning some rpms. I will burn a half of a gallon on friday, and get it ready to rip.

i will be over in your area for your guys' first big race

good luck in medford

I know there are a lot of variables but...... what engines have you seen that are very capable of making 10 pit stops in a buggy?

plus4 is the most consistent 10 min. runtimes using 6.5mm restrictor

im going back to the 6.5 bro....the 8mm was just too much and I was overdriving as a result(I know chillax on the trig) but yeah, I felt like I was much more consistent with the 6.5

whats a good temp range for my nova n21bf2000 to run at ? I have about 3/4 of a gallon on it and still have to preheat to get it running. I know not to tune to temp but dont want to overheat it at all. It is running pretty good but havent leaned it out as much as I would like. Its been running about 210-220 with plenty of smoke. Is there a magic range for this engine ??

HI Huston.

The problem with Nitrothane is not the fuel itself. I have had that happend also with Tornado, Byron, Mecca fuel. Only with Tornado myself but helped other people with the same problem.

The problem in all three cases is that the engine have been to lean on bottom end so the enigine temps get high. Then, the HSN is very rich and when you open the throttle to get some revs on the engine, fuel is gumming up and locks the piston. It is a really pain in the a.. to get them back up because th episton is so stuck i have used a wisegrip plier to get the piston unstuck. I have then changed the conrod just to be safe.

The last engine i did run in, i ran in on Nitrothane. It was an OS V-spec and usually they have been loosening up between 2 and 2.5 liters. Wit hNitrothane i did almoast 3,5 liters before it loosend up and still even ha a slight pinch. It runs cooler with Nitrothane than Sidewinder and Werks and i get better runtime.


Anders, Norway.

This wasnt our problem, our engine was idling through the second tank on the box, and the RPM's never came off idle. The engine was also running extremely cool [i.e. not lean and hot] and even witha towel wrapped around the head we struggled to get it over 190 degrees fahrenheit.

It seems to me that probably a bad batch of fuel went out, since alot of people claim recent success using nitrotane, and theres also people, such as myself, who have had to exact same problem... so probably a bad batch if I had to guess.

250 or under is just fine , just make sure you get the low end set right and only lean the top end as much as you need for the power desired