High volume oil pump adv/disadv

[Coasty]

Since i'm already tearing apart the lower part of my engine I thought I might as well do things like timing chain, oil pump etc... and I was thinking of going with a high volume oil pump, I can only see advantages to doing this, anyone think of a reason not to? BTW i have a '69 302 2bbl. One thing I can think of is the highvolume might make the leaks more pronounced, but hopefully i'll be taking care of all of those this weekend with the new rear main/front main, oil pan, valve cover...

 

[Coasty]

Oh yes, and differences between high volume and high pressure, if any...

 

[74bronc]

The small block ford engine has a superior oil system which means a HV is unneccessary unless you are turning some serious RPM's (racing). Any professional building that is well versed in SBF will tell you a standard oil pump is all that is needed. As for the leaks, you can't develop more leaks with a high volume pump since most of the engine isn't under oil pressure (at least at the points where leaks are prone.) just throw a standard pump in there are you are good to go.

 

[broncnaz]

Ditto that HV pumps are not nessary on a small block ford one disadvantage is that with the stock drain backs the HV pump may fill up the top end faster than it can drain back one cause of valve cover leaks also may cause oil to be sucked through the valves.
On the other hand I've run HV pumps for close to 200,000 miles on my 302 with no problems at 100,000 a HV was put in along with new rod and main bearings when rebuilt at 180,000 the crank was still like new just polished it and put in new stock size bearings but that doesnt really mean that the HV pump prevented wear more likely due to frequent oil changes if you go with a HV pump also get a good hardened shaft ARP makes a good one HV pumps are more likely to break a stock type shaft even though they give you a new stock shaft with the pump

 

[76Broncofromhell]

HV's aren't really necessary if you run a stock oiling system. BUt if plan on running a remote oil filter, an Accusump and an oil cooler, I would run an HV. I run one and I love it but my Bronco has a 9 qt capacity for oil. Good luck

 

[iwlbcnu]

A HV also takes more HP to turn, and is harder on the dist since that is what is running it.

 

[broncolove]

I know a few guys that have torn up there distributor gears because if HV pumps. Ditto You don't need it.

 

[Mikey]

Everything I've been told is the 289/302 can use a HV pump as there is plenty oil for the bearings and a bit short for the cam/lifters. One reason why one of the first things to wear out in a SB is the rear lifters. I wouldn't be concerned about it if you aren't doing higher RPMs. Also, would do this with a full rebuild, not on an old engine.

While you are changing the chain, go to any parts house and get a stock, say 1987, Mustang 5.0 chain and for $25 you will get a nice Cloyes dual roller. It will fit the older engines just fine.

Good luck!
Mikey

 

[BwoncoHowie]

I have run HV pumps and they make a difference for your valve train oiling. A stock oil pump will make your SB oil really well on the right side and just sort of dribble on the left side. A HV (but not High Pressure) oil pump will cure this. If the motor is fairly stock HV is not needed but if you plan to turn High RPMs, The HV lubes the valvetrain better. It will put slightly more stress on the dist gear. The HV pumps usually include the hardened drive stick.

Perfect Circle/Dana makes both kinds that are high quality and reasonably priced.
~BH

 

[Broncobowsher]

A high pressure pump is standard volume with the bypass set extra high. Not needed unless you plann on turning 9000+ RPM.

High volume pumps take more HP to run. They are harder on oil pump driveshafts and distributor gears. The High volume pumps will keep oil pressure up on loose engines. Often ups oil pressure at idle speeds. Builds oil pressure slightly faster (probably insignifiently faster). A good idea if you are running some accessory that is lubed by engine oil that was not originally there (turbochargers and some superchargers).

For a good tight stock engine, normal pump is fine. For freshening up a used engine go HV.