Quote:
Originally Posted by Flash68
So how did Joe try total timing at on your latest dyno session? How high did he go before reverting back to 32.5?
That is a huge difference to go from 37 to 32.5 for a 23* head. Timing is largely based on the efficiency of the head's combustion chamber, but you did not change heads, so I am confused.
I don't think I've seen a 23* head with such low total timing.
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I agree, definitely a huge difference but one that I was happy to see. I'm not an engine builder so I cant give you an educated answer to your question. All I know is the first thing we worked on was ignition timing. Joe would make an adjustment, we's make a couple pulls, and then repeat until Joe liked it
Quote:
Originally Posted by Vegas69
What is being done to control windage? Are you running a windage tray? Have you tried dropping the oil level say a quart?
I wouldn't even race it until you figure it out. Losing 15 lbs of oil pressure from 3000 to 6500 rpm means you have a serious issue. With an oil temp of only 174 on the dyno, it's going to be worse on the track. Especially if it's a windage issue which it almost certainly has to be.
Oil pressure should climb with rpm.
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Pan uses a screen for windage. Good call on dropping a quart. I know for a fact we had 7 quarts in a 6 quart pan and that was my decision only because I'm afraid of sucking air when on the track due to this happening to me before but with a different pan. When I get a chance I'm going to drain the oil and refill with 6 quarts but before I do I'll record rpm's and oil prssure the way it is and then record oil pressures with 6 quarts. If this doesn't remedy the issue I will probably cancel the track day.
Thanks for your input Todd.