LSA or Melling 10355 oil pump
LS1Tech Sponsor
Joined: Sep 2004
Posts: 827
Likes: 575
A factory LSA pump (which I'm just about positive is built by Melling anyway) is the same as a Melling 10355 in terms of volume output.
Both of these pumps move more oil per engine rotation than all of the other wet sump gerotor style LS pumps on the market due to the thickness of the gerotor itself....that is what dictates most of the volume gains.
The biggest difference between the two is the stock LSA pump has a standard pressure spring and the 10355 has a higher pressure spring installed (it may come with a standard pressure spring in the box.....Melling usually does that....provide the end user with a choice regarding pressure).
Personally I believe volume is more important than pressure. High pressure just tends to throw oil all over your cylinder walls that is escaping from engine bearing clearance and costing you a little power driving the pump harder.
This creates more potential windage losses and extra oil thrown on the cylinders now give the rings more to cope with as well. Too much oil everywhere is not beneficial.
You don't need a bunch of pressure with modern synthetic oils....just enough to do the job properly works every time. Excessive pressure can and will rob you of power and I don't see the benefit.
The short travel lifters with axle oiling and piston squirters will require an oil pump with higher output volume.
And while I normally port most of my clients oil pumps anyway, in your case Eric with both the lifters and the piston squirters it would be highly beneficial to increase output and efficiency even further with the porting but I would definitely recommend the standard pressure spring in which ever pump we purchase.
Im almost positive the LSA pump is cheaper and it already comes with the correct standard pressure spring installed.
Hope this helps
-Tony
Both of these pumps move more oil per engine rotation than all of the other wet sump gerotor style LS pumps on the market due to the thickness of the gerotor itself....that is what dictates most of the volume gains.
The biggest difference between the two is the stock LSA pump has a standard pressure spring and the 10355 has a higher pressure spring installed (it may come with a standard pressure spring in the box.....Melling usually does that....provide the end user with a choice regarding pressure).
Personally I believe volume is more important than pressure. High pressure just tends to throw oil all over your cylinder walls that is escaping from engine bearing clearance and costing you a little power driving the pump harder.
This creates more potential windage losses and extra oil thrown on the cylinders now give the rings more to cope with as well. Too much oil everywhere is not beneficial.
You don't need a bunch of pressure with modern synthetic oils....just enough to do the job properly works every time. Excessive pressure can and will rob you of power and I don't see the benefit.
The short travel lifters with axle oiling and piston squirters will require an oil pump with higher output volume.
And while I normally port most of my clients oil pumps anyway, in your case Eric with both the lifters and the piston squirters it would be highly beneficial to increase output and efficiency even further with the porting but I would definitely recommend the standard pressure spring in which ever pump we purchase.
Im almost positive the LSA pump is cheaper and it already comes with the correct standard pressure spring installed.
Hope this helps
-Tony
__________________
www.mamomotorsports.com
Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
www.mamomotorsports.com
Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
A factory LSA pump (which I'm just about positive is built by Melling anyway) is the same as a Melling 10355 in terms of volume output.
Both of these pumps move more oil per engine rotation than all of the other wet sump gerotor style LS pumps on the market due to the thickness of the gerotor itself....that is what dictates most of the volume gains.
The biggest difference between the two is the stock LSA pump has a standard pressure spring and the 10355 has a higher pressure spring installed (it may come with a standard pressure spring in the box.....Melling usually does that....provide the end user with a choice regarding pressure).
Personally I believe volume is more important than pressure. High pressure just tends to throw oil all over your cylinder walls that is escaping from engine bearing clearance and costing you a little power driving the pump harder.
This creates more potential windage losses and extra oil thrown on the cylinders now give the rings more to cope with as well. Too much oil everywhere is not beneficial.
You don't need a bunch of pressure with modern synthetic oils....just enough to do the job properly works every time. Excessive pressure can and will rob you of power and I don't see the benefit.
The short travel lifters with axle oiling and piston squirters will require an oil pump with higher output volume.
And while I normally port most of my clients oil pumps anyway, in your case Eric with both the lifters and the piston squirters it would be highly beneficial to increase output and efficiency even further with the porting but I would definitely recommend the standard pressure spring in which ever pump we purchase.
Im almost positive the LSA pump is cheaper and it already comes with the correct standard pressure spring installed.
Hope this helps
-Tony
Both of these pumps move more oil per engine rotation than all of the other wet sump gerotor style LS pumps on the market due to the thickness of the gerotor itself....that is what dictates most of the volume gains.
The biggest difference between the two is the stock LSA pump has a standard pressure spring and the 10355 has a higher pressure spring installed (it may come with a standard pressure spring in the box.....Melling usually does that....provide the end user with a choice regarding pressure).
Personally I believe volume is more important than pressure. High pressure just tends to throw oil all over your cylinder walls that is escaping from engine bearing clearance and costing you a little power driving the pump harder.
This creates more potential windage losses and extra oil thrown on the cylinders now give the rings more to cope with as well. Too much oil everywhere is not beneficial.
You don't need a bunch of pressure with modern synthetic oils....just enough to do the job properly works every time. Excessive pressure can and will rob you of power and I don't see the benefit.
The short travel lifters with axle oiling and piston squirters will require an oil pump with higher output volume.
And while I normally port most of my clients oil pumps anyway, in your case Eric with both the lifters and the piston squirters it would be highly beneficial to increase output and efficiency even further with the porting but I would definitely recommend the standard pressure spring in which ever pump we purchase.
Im almost positive the LSA pump is cheaper and it already comes with the correct standard pressure spring installed.
Hope this helps
-Tony
X2, all the TBSS guys online say to go with a high pressure pump due to the rod bearing issues. Tony spec'ed me a high volume pump and while I questioned it, I trusted his judgement. Makes total sense now.
X3. Stock pumps put out plenty of pressure. I've always thought higher volume, rather than higher pressure. High volume won't pump any more oil thru the motor than is needed. High pressure will.
A factory LSA pump (which I'm just about positive is built by Melling anyway) is the same as a Melling 10355 in terms of volume output.
Both of these pumps move more oil per engine rotation than all of the other wet sump gerotor style LS pumps on the market due to the thickness of the gerotor itself....that is what dictates most of the volume gains.
The biggest difference between the two is the stock LSA pump has a standard pressure spring and the 10355 has a higher pressure spring installed (it may come with a standard pressure spring in the box.....Melling usually does that....provide the end user with a choice regarding pressure).
Personally I believe volume is more important than pressure. High pressure just tends to throw oil all over your cylinder walls that is escaping from engine bearing clearance and costing you a little power driving the pump harder.
This creates more potential windage losses and extra oil thrown on the cylinders now give the rings more to cope with as well. Too much oil everywhere is not beneficial.
You don't need a bunch of pressure with modern synthetic oils....just enough to do the job properly works every time. Excessive pressure can and will rob you of power and I don't see the benefit.
The short travel lifters with axle oiling and piston squirters will require an oil pump with higher output volume.
And while I normally port most of my clients oil pumps anyway, in your case Eric with both the lifters and the piston squirters it would be highly beneficial to increase output and efficiency even further with the porting but I would definitely recommend the standard pressure spring in which ever pump we purchase.
Im almost positive the LSA pump is cheaper and it already comes with the correct standard pressure spring installed.
Hope this helps
-Tony
Both of these pumps move more oil per engine rotation than all of the other wet sump gerotor style LS pumps on the market due to the thickness of the gerotor itself....that is what dictates most of the volume gains.
The biggest difference between the two is the stock LSA pump has a standard pressure spring and the 10355 has a higher pressure spring installed (it may come with a standard pressure spring in the box.....Melling usually does that....provide the end user with a choice regarding pressure).
Personally I believe volume is more important than pressure. High pressure just tends to throw oil all over your cylinder walls that is escaping from engine bearing clearance and costing you a little power driving the pump harder.
This creates more potential windage losses and extra oil thrown on the cylinders now give the rings more to cope with as well. Too much oil everywhere is not beneficial.
You don't need a bunch of pressure with modern synthetic oils....just enough to do the job properly works every time. Excessive pressure can and will rob you of power and I don't see the benefit.
The short travel lifters with axle oiling and piston squirters will require an oil pump with higher output volume.
And while I normally port most of my clients oil pumps anyway, in your case Eric with both the lifters and the piston squirters it would be highly beneficial to increase output and efficiency even further with the porting but I would definitely recommend the standard pressure spring in which ever pump we purchase.
Im almost positive the LSA pump is cheaper and it already comes with the correct standard pressure spring installed.
Hope this helps
-Tony
