oil pressure 396 stroker spf #1050

marmmansa · #1 (**permalink**) 07-23-2001, 03:27 PM

what should my oil pressure be. On the dyno it was 60-70 in the car it is 40-50.I was told the superformance oil cooler is very small and that is the reason for the drop in pressure.

BJGreen · #2 (**permalink**) 07-23-2001, 06:23 PM

There has been some discussion on this subject before. I racall another member having mentioned that some of the SP cars do not have the oil cooler actually hooked up because of oil flow restriction.

I have no personal experience with this probablem but using the search feature might uncover the original thread.

Good Luck

Mike Madonna · #3 (**permalink**) 07-23-2001, 07:34 PM

SPF 952 392 "Crate Stroker"

475 miles (not EVEN broke in yet), oil pressure on guage reads 60-65 at start-up. With oil at 70-80 degrees C., pressure is 55-62.

MY 401K · #4 (**permalink**) 08-02-2001, 01:01 PM

We finally found out why I haven't had good oil pressure in my 392 stroker crate motor. We took off the two lines at the oil cooler and put in a by-pass. I instantly had 60 psi @ hot idle. I reinstalled the hoses and it dropped down to 40 and it doesn't matter if I rev to 5000, it doesn't go above 40. Definitely a problem with restriction. I put in a Melling HV oil pump as suggested but to no avail. Will it hurt the engine if I race it with the low oil pressure ??? Besides a by-pass does anyone know of another cure for this problem ??? Like a perfect replacement oil cooler ???

marmmansa · #5 (**permalink**) 08-02-2001, 02:28 PM

I think that the oil cooler is to small for the car.My engine on the dyno was 60-70 put in car and 40-50 it has to be the restriction on the cooler.

MY 401K · #6 (**permalink**) 08-02-2001, 08:19 PM

I will be replacing the 20-50 with 10-40 Quaker State and see if that makes a difference. If not, The cooler will have to be modified. I'll keep you posted on what fixes I try. I can't understand why the 351 & 460 don't have the same problem. John

wilf leek · #7 (**permalink**) 08-03-2001, 05:37 AM

Hi there - thought my experiences might help.

I am running a stroker (408) Windsor in my (UK) Crendon. When I installed the oil cooler, I looked up several previous threads about what dia lines to run, and size of fittings to use, since I have fairly long piping runs and wanted to avoid a pressure drop problem. I used all dash 12 aeroquip fittings (NOT the forged ones which have pressure drop issues) and hose, with a Mocal 235 mm wide 13 row cooler.
One area I had to attend to was the oil take-off sandwich plate, where I opened up the oil passages with a die grinder. Without this the internal passges would have severely restricted oil flow, no matter what size piping I used.

Result is 50 psi at tickover, 60 - 65 psi from 3000rpm up, hot. I am using valvoline racing oil, 20W-50W, non synthetic, which is a vast improvement on the oils I tried previously.

hope this helps

Wilf

MY 401K · #8 (**permalink**) 08-06-2001, 08:38 PM

I will bwe changing the oil to 10-40 this weekend. If I still have low pressure I will be modifying the oil cooler. I will keep CC posted. John

Chad Johnson · #9 (**permalink**) 08-06-2001, 11:34 PM

What RPM's are you running to get the 40-50psi? I have always
heard that a good rule of thumb is 10psi/1000 RPM for anything over 3000 RPM.

By the way Competition Motorsports built the engine for my SPF #908 and did not hook up the oil cooler. Just uses the Canton pan and no problem with either pressure or temperature

Steve R · #10 (**permalink**) 08-07-2001, 05:29 PM

Marmmansa,
40 -50 psi at idle is plenty of oil pressure. I have had small block fords idle at 25 psi with no problems....and I drove the hell out of them.
Steve

marmmansa · #11 (**permalink**) 08-07-2001, 07:27 PM

I am running the hell out of my too and it seems to be fine.2nd and 3rd are my favorite gears to rip through when I give my buddies rides. Most of them are BB chevy guys and when I take them for a ride they can not believe how fast these cobras cars are.