HV or STD oil pump (again)
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
HV or STD oil pump (again)
I've almost ordered a HV oil pump form Melling (m-select 10550) but I did some research and it seems that there are a lot of people against using Hv pumps.
Most reasons against are:
1. Too much volume will make pump recirculate extra volume and cause
oil foaming and heating.
2. Possible oil starvation on continuous hig rpms.
3. Premature distributor (or even cam) gear
4. HP loss
5. Both CompCams and Crane advise not to use HV pumps with their cams
And here is link to "myths" on Mellings site:
http://www.mellingselectperformance....lume-pumps.pdf
Now, I know that nobody will tell that their product is bad, but they also make std volume pumps at the same price as HV, so I don't see why would they lie.
And now, what is most important to me, what should I use, HV or STD?
This is what I'll use in bottom end:
- stock crank, repolished (so clearances might be a little higher, good for HV pump?)
- std/std main/rod bearings
- Canton RR oil pan (7qt)
- hyd roller cam
- ls lifters
-
Most reasons against are:
1. Too much volume will make pump recirculate extra volume and cause
oil foaming and heating.
2. Possible oil starvation on continuous hig rpms.
3. Premature distributor (or even cam) gear
4. HP loss
5. Both CompCams and Crane advise not to use HV pumps with their cams
And here is link to "myths" on Mellings site:
http://www.mellingselectperformance....lume-pumps.pdf
Now, I know that nobody will tell that their product is bad, but they also make std volume pumps at the same price as HV, so I don't see why would they lie.
And now, what is most important to me, what should I use, HV or STD?
This is what I'll use in bottom end:
- stock crank, repolished (so clearances might be a little higher, good for HV pump?)
- std/std main/rod bearings
- Canton RR oil pan (7qt)
- hyd roller cam
- ls lifters
-
Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
I was in your position a few years ago and went with the 10552 - it is the equivalent of the stock Camaro pump that is only 10% additional volume vs 25% with the HV. Be carefull with the bolt on screens used by the select pump. Check the length of the bolt to be sure they are not too long. There was an issue with this and the screen would loosen and fall off.
Just my 2cents.
Good Luck.
Just my 2cents.
Good Luck.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Recently I posted a LONG response on the five distributor gears I went through with HV pumps installed, so I won't repeat it here. Three different engines, all new pumps, different camshafts and all new gears; the only common denominator was the use of a HV oil pump.
Suffice it to say that in spite of what Melling claims, HV pumps eat distributor gears. All of the guys on other Forums, whose views I respect, agree.
Of course, as with all other things, it's your call.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!
Suffice it to say that in spite of what Melling claims, HV pumps eat distributor gears. All of the guys on other Forums, whose views I respect, agree.
Of course, as with all other things, it's your call.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!
Last edited by JAKE; Nov 3, 2009 at 06:44 PM.
