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.
http://i200.photobucket.com/albums/a...Graph_0001.jpg

thanks Todd, we'll look into it and report what we find.

Im going to speak to Joe and Gaetano later. I want to find out what oil was being used and the level. The level may have been incorrect.

0.60 sounds good Vince. Just let me know also what it will cost.
Thanks Shane

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

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.

I took some oil pressure readings but went with water temps beause I am now using the oil temp bung in the pan for the dip stick.

Initial start up cold at 1000 rpm was at 68 lbs
Temp at 180, rpm 750, oil pressure 53 lbs
Temp 190, rpm 750, oil pressure 52 lbs
Temp 200, rpm 750, oil pressure 48 lbs
Temp 205, rpm 6300 and held for a few seconds, oil pressure 62 lbs

I asked Joe why the difference in readings and he said because the dyno was running the engine through an oil cooler and it had an adjustable flow restrictor.

Needless to say I am now relieved.

Not much worse than Gearhead Hypochondriasis...........not that I would know much about it. :sarcasm_smiley:

I worry more about potential mechanical issues with the Camaro than waiting melanoma biopsy results. :sieg:

Hopefully that's all it was, to be safe don't drop your guard.

Glad to hear it was something simple.

I know exactly what your talking about Sieg. This is what seperates us car guys from the rest........sometimes I wonder about my priorities :headscratch:

Thanks Wayne. I appreciate that. Hope things are going better for you. :thumbsup:

and here i was getting ready to tear it apart thursday afternoon and have it ready by friday night. I guess its date night.

thanks for looking out guys.

Good to see your oil pressure is where it belongs. The explanation Joe gave you doesn't make any sense to me. Wouldn't that limit max oil pressure, not having it fall off with an RPM increase?

In regards to your extra quart. That was a good band aid for poor oil control with windage as your side effect. I wouldn't do it on this setup if it's a quality pan. Windage is BAD.

Needless to say, track test it and look when everything is HOT.