Originally Posted by
JANKEII
Thanks guys,
I had a race this weekend and had an expert tune the engine. He had the engine running great.
The three quailifers(6min) the engine ran great. Then the main came(30min), and the engine would die during the race. Happen three times duirng the race. The engine still has great compression.
I know when the engine was new the engine would idle with no problem. I feel like the engine is close to tune. I know temp outside and etc would effect the tune a little. Just was wondering if you guys think the engine is done.
Thanks
Oh, when I finished the race the temp was 215F. During the fuel pits the temp was always around that temp. I have never run the engine above 220F.
Ok, just ran across your second post. Couple of things to consider here, if you had an issue with the idle at first then the guy tuned it and it ran great for 3 qualifiers then it flamed out in the mail this would indicate to me that the engine is not done. If the engine or I should say the P/S is shot then you will not be able to make the engine idle at all which you clearly can do. All that I think that you are doing is running the engine too rich. Never running a motor above 220F is not necessarily a good thing, just run the engine where it performs best.
So... now we get to the question of what changed to have it run fine in the qualifiers and then flame out in the main. Well there are a couple of possibilities but if you are already running rich as I'm thinking the most likely one is that your driving style changed lol! Sounds odd I know but in qualifiers people have a tendency to drive harder than they normally do, this causes the engines to run hotter. During the course of a 30 minute main most people start off punched (which makes your engine run hotter) and then tend to get into a zone and mellow out and drive a lot smoother (which makes your motor run cooler). So if you were already rich to start with in the quals driving hard you would end up even richer in the main when you are driving smoother, make sense? So in my opinion just lean the engine out to elevate the idle and you should be good. Let me know if this works for you.
Regards,
Ron