ChitownRC

:joy: have been breaking in my new Nova this week and have a few questions about the way its starting. For the very first tank or heat cycle, I ran the motor and plugged the exhaust to fill the lines with fuel, connected the igniter and Boom it fired instantly and ran a perfect cycle. Second cycle went just as smooth, needles were showing slightly rich for that tank cause it flamed out once but finished the tank with ease. Of course I was setting to BDC after every cycle. The third tank came from hell, I couldn't get it started, I pre-warmed the head everytime I went to start it as well, but the damn thing would not fire. There was raw fuel coming out of the exhaust so I figured it was flooded; I pulled the plug, dried it, and did the normal flushing of the engine of fuel, and had lots of it come from the pipe. Tried to restart...nothing, not even a pop. Changed the plug, still nothing. Heated the head 4 times and finally got it to fire and stay fired after 20+mins of trying :confused: . Fourth cycle ran as good as the first (ok like WTF). Lots of fuel coming out the exhaust still but stayed running and had enormous power still. Fifth cycle tank went ok, a little hard to start but once running it stayed and I had to lean out the HSN just a tad to get some descent full throttle runs, temps never broke 210F ever. OK so all that is just the breakin, here is where it gets kinda strange for me. I am using Byrons 25% with a #6 turbo NR plug (med/hot factory plug). The engine will not fire unless I have loads of fuel spitting out of the exhaust while trying to start it. I can not even get a sputter while turning it over and no fuel at exhaust, but I plug the stinger, loads of fuel poors out and the damn thing fires, but dies. Do the same thing, rolling it over and over again and will not fire until I plug the stinger and pisses out loads of fuel and then it fires again and I nudge the throttle, it spits out lots of fuel of course from the pipe and stays running.

Idles all day long, flips the truck on its lid with enough force to almost do a standstill backflip and is too fast to control in 2nd gear cause the tires are power sliding even when its opened up full throttle. I am not keeping high RPM's as of yet just getting in some higher speed runs then backing off it. But WTF is keeping it from starting unless I flood it? I choke the engine to die when I shut it off like the manual (or that stupid little sheet that NR gives you with $400+ engines) so I am not flooding it to stall, and it runs like you would not believe.

So what gives?

BTW when I leaned it the temps never breached 230F. Someone on the LST boards suggested a cold plug, sounds like I can try it but hard to believe it would act like that. LMK if anyone has some ideas for me.

Wow a little long but I will try to help....

First off on break in wher eyou running 1 full tank as a cycle or 2-3 minutes for a cycle. Not sure what break in method you are using but the heat cycle is by 2-3 minutes runs not tanks....

I run a 528 in my lsp, and it was one of the easiest to break in, but one thing about it, it is very sensitive on the low speed needle, I barely ever touch my HSN. This is different than most of my other engines. Most people I know that have tunning issues with this engine, is they are to lean on the lsn and to fat on the hsn. I run the same plug you run all winter long, with no probs.

i was doing 3min cycles at 200F then BDC cooldowns, 5 times. I wanted to type as much as possible to make sure I answered all questions to get to the point . When I pinch the LSN to shut it off, it takes about 6-7 seconds to die and it speeds up before stalling so I know its rich. But having to get fuel spitting out to get any kind of fire in the engine is whats strange to me.