Do I need a 7 quart oil pan??
- Thread starter pb_paulie_b
- Start date
-
Sponsors (?)
SQUEEZE&STROKE
New Member
You may or may not need it depending on the stroke of your crank...I have a 331 stroker and girdle and I still run the stock pan...It had to be..uh..massaged to fit. (used a sledge hammer)
In the world of 351w strokers mine is little. I don't even have to notch the block soooooo do I need one??
I have a hi volume pump. I do plan on running a windage tray to help keep some of the oil in the pan. Thanks guys. I will get the FMS swap pan then...PB
srothfuss
Last night I stabbed the same guy 7 times in a row
One of the advantages to a larger pan is it moves the oil away from the rotating assembly. If you buy a 7 quart pan and only use 5, it's like a cheap form of a windage tray.
As jason mentioned though, a H.V. oil pump has the capability to suck all 5 quarts out of the pan in the higher RPM ranges. I don't think that will happen with your motor though.
As jason mentioned though, a H.V. oil pump has the capability to suck all 5 quarts out of the pan in the higher RPM ranges. I don't think that will happen with your motor though.
bryce93lx
Member
If the pan keeps the oil away from the crank, more oil is never a bad thing. the more oil the more heat it can absorb, that is why race motors with dry sump systems that have no more than a quart or two in the pan, still run giant ten to fifteen quart tanks, more oil means cooler oil.
srothfuss
Last night I stabbed the same guy 7 times in a row
FarBeyondDriven said:
I remember that thread. I thought we went to the melling website and they recommended the regular pump over the H.V.
Found it! this was one of JR's posts about it
http://forums.stangnet.com/showpost.php?p=5778880&postcount=14
http://forums.stangnet.com/showpost.php?p=5778880&postcount=14
Michael Yount
Mustang Master
More oil means slightly cooler oil in a dry sump system; it doesn't mean cooler oil in a wet sump. It just means it takes a bit longer for it to heat up --- and longer for it to cool down. If you want cooler oil add an oil cooler, not a larger volume wet sump. And I've never seen a dry sump set up that didn't have an oil cooler as an integral part of the system.
Most racers who use "7 qt" pans don't run 7 qts - the name is a bit of a misnomer. They run 5 qts. and use the pan to get the oil further away from the crank to reduce windage losses as Rothfuss alluded to.
High volume pumps should be used on racing motors built with looser bearing clearances. If the clearances are larger, a larger volume of oil has to be moved in order to fill the clearance AND maintain appropriate pressures. If you use a HV pump with normal (smaller) clearances, all the pump does is consume additional HP to pump a bunch of oil around/through the pump's bypass. Higher pressure pump (or reset the relief valve) for high revving motors that need more pressure. High volume pump for larger bearing clearances to maintain pressure while moving more oil. Anything else --- just a regular ole pump with the relief set at 60-65 psig.
Most racers who use "7 qt" pans don't run 7 qts - the name is a bit of a misnomer. They run 5 qts. and use the pan to get the oil further away from the crank to reduce windage losses as Rothfuss alluded to.
High volume pumps should be used on racing motors built with looser bearing clearances. If the clearances are larger, a larger volume of oil has to be moved in order to fill the clearance AND maintain appropriate pressures. If you use a HV pump with normal (smaller) clearances, all the pump does is consume additional HP to pump a bunch of oil around/through the pump's bypass. Higher pressure pump (or reset the relief valve) for high revving motors that need more pressure. High volume pump for larger bearing clearances to maintain pressure while moving more oil. Anything else --- just a regular ole pump with the relief set at 60-65 psig.
