You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Oil pressure readings
- Thread starter Matthew
- Start date
Sorry,wish i knew what these motors were supposed to read...My good guess would be about 32PSI at idle...and about 45-55PSI at cruising speed...This is just an educated guess....A motor only requires about 8-10 PSI to operate within efficiency...Matthew said:thats not helping much lol.
Matt
Naaahhh ....Every car will vary ....depends on motor wear,oil viscosity..and other factor including temp.Matthew said:hmmm...i dont think my cold idle was that high, i guess ill have to check. **** i hope i dont have a problem with THAT gauge too.
Matt
I assume you are talking to 505zoom?Matthew said:what weight are you using
Matt
I run 5W30 Mobil1 Syn for what its worth..505zoom said:10w30 here.
Matt
- :
- 2001 Mazda MP3
Matthew said:**** i hope i dont have a problem with THAT gauge too.
yeah christ matt, im totally out just to screw you over.
Guys,Matthew said:what are normal oil pressure readings (normal, idle, turning, under boost, etc)?
Be careful with these motors!!! We have had some significant issues with oil pressure in the Grand-Am Cup Mazdaspeed Protege motor. The guys in World challlenge have had the same issues. The oil pump on these motors is not that efficient and very sensitive to engine bearing clearances. According to the factory manual, the stock oil pressure should be 45-60 psi at 3500. That's a wide range but within the accepted 10 psi for every 1000 rpm. Be careful with a motor that is not producing enough oil pressure! I can show you the results....not pretty!
We are currently working on some "fixes" for the situation. Can keep you apprised if interested.....
Take Care,
Tom
Doc B Racing
Interesting....MP3racer said:Guys,
Be careful with these motors!!! We have had some significant issues with oil pressure in the Grand-Am Cup Mazdaspeed Protege motor. The guys in World challlenge have had the same issues. The oil pump on these motors is not that efficient and very sensitive to engine bearing clearances. According to the factory manual, the stock oil pressure should be 45-60 psi at 3500. That's a wide range but within the accepted 10 psi for every 1000 rpm. Be careful with a motor that is not producing enough oil pressure! I can show you the results....not pretty!
We are currently working on some "fixes" for the situation. Can keep you apprised if interested.....
Take Care,
Tom
Doc B Racing
Referencing back to previous threads of oil issues, are you having any problems with pickup? Any idea of how far out of "spec" the clearances can fall to cause an issue?
Regarding the pickup, we are running an extra large sump with trap doors around the pickup. The combination keeps the pickup well covered. We have not had the usual pickup issues seen when cornering, etc. Actually, the issues are more general and linear in that as the clearances are opened up average oil pressure will drop. As with most race motors, the clearances are opened up to the bigger end of stock from the start to allow a better oil wedge and easier revving. However, with these motors and the stock oil pump as you open up the clearances the pressure quickly drops. We are working with different clearances and other remedies for the situation and canupdate once we get some more data if interested....kcbhiw said:Interesting....
Referencing back to previous threads of oil issues, are you having any problems with pickup? Any idea of how far out of "spec" the clearances can fall to cause an issue?
Thanks,
Tom
Sorry, Matthew for hijacking your thread....MP3racer said:Regarding the pickup, we are running an extra large sump with trap doors around the pickup. The combination keeps the pickup well covered. We have not had the usual pickup issues seen when cornering, etc. Actually, the issues are more general and linear in that as the clearances are opened up average oil pressure will drop. As with most race motors, the clearances are opened up to the bigger end of stock from the start to allow a better oil wedge and easier revving. However, with these motors and the stock oil pump as you open up the clearances the pressure quickly drops. We are working with different clearances and other remedies for the situation and canupdate once we get some more data if interested....
Thanks,
Tom
Tom,
I'd be very interested in your findings. I hope that you'll keep us aprised. Are you guys using a smaller journal crank, smaller bearings, etc? Have you blocked the oil squirter ports?
7
70
Subscribing for good info...
New Posts and Comments
- Replies
- 4
- Views
- 131
- Replies
- 594
- Views
- 244K
- Replies
- 0
- Views
- 34