high volume pump in stock bottom?

stanger8172 · 02-06-2002, 09:17 AM

Will a high volume oil pump fit in a stock bottom end?

Rick 91GT · 02-06-2002, 11:36 AM

A HV pump will not fir in a stock oil pan, some say you can take a hammer and beat on it but I don't like the idea of that. A HV pump for your application will be more trouble then it is worth. It will pump more oil to the top of the motor then is needed and will cause breathing and draining issues and rob HP since there is 30% more stress on the pump driveshaft.

Jeff Chambers · 02-06-2002, 12:29 PM

I ran a Melling HV in my motor with a stock oil pan and didn't have to massage the pan at all. I'll agree though that its not needed. I've gone back to standard volume pumps and have never had an oiling problem with any of my motors...of course the quality of the engine builder has a direct effect on that.

FoxBuilder · 02-06-2002, 01:05 PM

A high volume pump should fit fine but I agree with Jeff, it does depend on the engine builder. The only reson I run an HV pump is because I increased my oil clearance on the bearings.

LX XLR8R · 02-06-2002, 01:59 PM

HV will fit without cleanace problems..high pressure you have to bang the pan out...IMO both are waste of money and create problems(leaks/PVC issues) nuless you are running a motor that needs it..i will never use anything but a good motorsport stock one anymore

gtsr515 · 02-06-2002, 09:32 PM

A HV pump will fit, well mine did anyway, on a stocker without beating the pan up, but is not worth it, first off to be effective, you must have certain oil passages chamfered to accept the extra oil pressure and you MUST replace the stock driveshaft with a hardened unit, as the stocker will twist like a pretzel.

"Been there, regretted that"

stanger8172 · 02-06-2002, 11:50 PM

Thanks for all the replys! My Girlfriend's cousin was wondering about it too. Should I get an OEM replacement, or a Ford Motorsport replacement? I heard that I might need new rod bearings and as long as Im in there I will put a windage tray in, too.

Rick 91GT · 02-07-2002, 08:22 AM

Get a Melling stock replacement and a ARP hardened pump shaft, and you may want to get a new pick up depending on what yours looks like.

stanger8172 · 02-07-2002, 06:56 PM

Alright, thanx!

02-06-2002, 09:17 AM	#1
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	high volume pump in stock bottom? Will a high volume oil pump fit in a stock bottom end? __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

02-06-2002, 11:36 AM	#2
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	A HV pump will not fir in a stock oil pan, some say you can take a hammer and beat on it but I don't like the idea of that. A HV pump for your application will be more trouble then it is worth. It will pump more oil to the top of the motor then is needed and will cause breathing and draining issues and rob HP since there is 30% more stress on the pump driveshaft. __________________ *D/R 10108 NMRA Drag Radial, 25.5 chassis, F1R* *Check out RNH Performance Performance Engines and Custom Fabrication.* *From Mild to Wild we can build what you want, when you want it.* FOR SALE Stainless Steel Torque Box Supports

02-06-2002, 12:29 PM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	I ran a Melling HV in my motor with a stock oil pan and didn't have to massage the pan at all. I'll agree though that its not needed. I've gone back to standard volume pumps and have never had an oiling problem with any of my motors...of course the quality of the engine builder has a direct effect on that. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

02-06-2002, 01:05 PM	#4
FoxBuilder Registered Member Join Date: Sep 1999 Location: Columbus, Ohio Posts: 233	A high volume pump should fit fine but I agree with Jeff, it does depend on the engine builder. The only reson I run an HV pump is because I increased my oil clearance on the bearings. __________________ 2001 Mustang GT 4.6L w/AODE: K&N FIPK kit, 87mm MAF, 19lbr., H-Pipe, Mufflers, 2.73, stock rubber, (4) custom programs by me using Autologic chips. Best E.T. 13.890@100.0mph 1984 Mustang LX 5.0L w/T-5: BOSS, TFSTW, Vic. Jr., BG, trick stick.

02-06-2002, 01:59 PM	#5
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	HV will fit without cleanace problems..high pressure you have to bang the pan out...IMO both are waste of money and create problems(leaks/PVC issues) nuless you are running a motor that needs it..i will never use anything but a good motorsport stock one anymore __________________ 95 undecided cubes, AFR 185s,undecided cam, undecided intake, and a 150 hit 89 "turbonotch" 2.3T You might want to hold on..i saw this on a cartoon once

02-06-2002, 09:32 PM	#6
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	A HV pump will fit, well mine did anyway, on a stocker without beating the pan up, but is not worth it, first off to be effective, you must have certain oil passages chamfered to accept the extra oil pressure and you MUST replace the stock driveshaft with a hardened unit, as the stocker will twist like a pretzel. "Been there, regretted that" __________________ Remember...2nd place is 1st place for losers!

02-06-2002, 11:50 PM	#7
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	Thanks for all the replys! My Girlfriend's cousin was wondering about it too. Should I get an OEM replacement, or a Ford Motorsport replacement? I heard that I might need new rod bearings and as long as Im in there I will put a windage tray in, too. __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

02-07-2002, 08:22 AM	#8
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	Get a Melling stock replacement and a ARP hardened pump shaft, and you may want to get a new pick up depending on what yours looks like. __________________ *D/R 10108 NMRA Drag Radial, 25.5 chassis, F1R* *Check out RNH Performance Performance Engines and Custom Fabrication.* *From Mild to Wild we can build what you want, when you want it.* FOR SALE Stainless Steel Torque Box Supports

02-07-2002, 06:56 PM	#9
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	Alright, thanx! __________________ '91 LX convertible , T-5, Centerforce Dual Friction, MSD Blaster Coil, FR 9MM wires, 13* timing, 1.6rr, ported/polished/milled stock heads, 1.94/1.60 stainless valves, March Performance Pulleys, K&N panel, 1"spacer, BBK shorties, 2 1/2" off road H, Summit 2 1/2" catback

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