IMPORTANT LS Gerotor Oil Pump Data
Thread Starter
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
IMPORTANT LS Gerotor Oil Pump Data
Gentlemen,
Over the past few days I have had an opportunity to discuss LS gerotor oil pumps with an engineer who designs and tests such pumps.
Before I go any further, I need to warn that some of the data I am going to present will confound and upset some of you. So, if you decide to read on, don't throw darts.
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It is obvious from the data that the Melling M10335 or M365 pumps are a major improvement over the original and even the improved LS7 and LS9 oil pumps. They are available from JEGS and Summit.
If you are having an engine built that will use a gerotor pump have your engine builder install either the M10335 or M365 pump. For less than $150, it's a great engine life improvement.
-
Over the past few days I have had an opportunity to discuss LS gerotor oil pumps with an engineer who designs and tests such pumps.
Before I go any further, I need to warn that some of the data I am going to present will confound and upset some of you. So, if you decide to read on, don't throw darts.
- All three of the Detroit OEMs are working on improving their crank mounted gerotor pumps.
- Ford is having problems with their supercharged modular engines and gerotor oil pumps. It seems that the belt load of their supercharger is deflecting the snout of the crankshaft and putting a high load on the inner gear of the oil pump. So, if you have or are looking at putting a supercharger on you LS engine, be certain that you have a good fully counterweighted, internally balanced forged crankshaft, with the appropriate ATI damper on the snout to minimize the deflection of the crankshaft and its snout.
- Chrylser is also looking at the design of their gerotor oil pumps on their HEMI engines for improved output.
- GM is looking at improving the output of the gerotor oil pump for the LS7, LSA, and LS9 engines.
.
It is obvious from the data that the Melling M10335 or M365 pumps are a major improvement over the original and even the improved LS7 and LS9 oil pumps. They are available from JEGS and Summit.
If you are having an engine built that will use a gerotor pump have your engine builder install either the M10335 or M365 pump. For less than $150, it's a great engine life improvement.
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Burning Brakes
Joined: Feb 2006
Posts: 1,085
Likes: 3
From: Ottawa Ontario, Canada
- Ford is having problems with their supercharged modular engines and gerotor oil pumps. It seems that the belt load of their supercharger is deflecting the snout of the crankshaft and putting a high load on the inner gear of the oil pump. So, if you have or are looking at putting a supercharger on you LS engine, be certain that you have a good fully counterweighted, internally balanced forged crankshaft, with the appropriate ATI damper on the snout to minimize the deflection of the crankshaft and its snout.
I would imagine if Ford is having problems it's because the supercharger setup they're using adds an additional belt, so the crank load would increase as there is now loading from the accessory belt as well as the supercharger belt.
This is just speculation on my part, I don't have a supercharger and I'm not a powertrain Engineer.
Good info on the oil pumps - Thanks!
Le Mans Master
Joined: Sep 2003
Posts: 6,272
Likes: 225
From: Farmington CT
Cruise-In VII Veteran
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
WOW! Excellent data. Glad I went with that melling pump when I did my last set of mods! Its an excellent pump and looks well built! That flow data is impressive compared to stock!
Thanks for the data.
BC
Thanks for the data.
BC
