Oil pump modifications for big horsepower and high revs
Mar 7, 2014, 12:43 PM
#1
Oil pump modifications for big horsepower and high revs
It doesn't seem to be public knowledge or common knowledge, but I'm curious who does what? Are the straight cut gears the only way to go? Can the 90 DSM oil pump gears work in an evo oil pump? Do the helical gears still work fine at 9000+ rpm and 800+hp?
Does anyone do any other modifications to the oil pump itself?
Do evos port the OFH like DSMs?
I did a bunch of searching and didn't find any decent information, not sure if it isn't out there or my search terms weren't proper
Thanks guys
Does anyone do any other modifications to the oil pump itself?
Do evos port the OFH like DSMs?
I did a bunch of searching and didn't find any decent information, not sure if it isn't out there or my search terms weren't proper
Thanks guys
Jun 8, 2015, 03:55 PM
#3
Evolving Member
iTrader: (8)
Join Date: Oct 2010
Location: Toronto, Ontario
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
Bumping this because I too am curious as to what people are doing. Do the straight cut oil pump gears work for the evo oil pump? What other modificationa are suggested for 9k rpm and high hp evos?
Last edited by car_nut15; Jun 8, 2015 at 07:00 PM.
Jun 10, 2015, 07:30 AM
#6
Evolving Member
iTrader: (8)
Join Date: Oct 2010
Location: Toronto, Ontario
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
https://www.evolutionm.net/forums/ve...pump-gear.html
Here is one option
Here is one option
Jun 10, 2015, 09:07 AM
#7
straight cut gears do nothing but ad noise. side load on gears is not the problem. its the small shaft on oil pump drive that gets side loaded into the input housing. stiff valve springs. lightweight clutch assemblies, over tightened belts and possibly kevlar belts are most of the problem. a good polish and debur of the pump is about the best thing out to prevent. machined down balance shaft is waste of money as well and does zero to prevent.
Trending Topics
Jun 10, 2015, 12:38 PM
#8
Evolving Member
Join Date: Mar 2015
Location: Boring Oregon
Posts: 180
Likes: 0
Received 0 Likes
on
0 Posts
straight cut gears do nothing but ad noise. side load on gears is not the problem. its the small shaft on oil pump drive that gets side loaded into the input housing. stiff valve springs. lightweight clutch assemblies, over tightened belts and possibly kevlar belts are most of the problem. a good polish and debur of the pump is about the best thing out to prevent. machined down balance shaft is waste of money as well and does zero to prevent.
Also I know it's common knowledge people also remove to balance shaft and try to find solutions to help eliminate the stub shaft options to get the most out of their oil pump (and assembly). However over time its been found out that it does cause premature wear with motor and clutch assemblies.
The stock oil pump is really good
I've taken it that high on previous Evos
Jun 10, 2015, 02:19 PM
#10
Evolving Member
iTrader: (8)
Join Date: Oct 2010
Location: Toronto, Ontario
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
So are you saying the oil pump won't hold up to 9k rpm pulls for very long?
Last edited by car_nut15; Jun 10, 2015 at 07:27 PM.
Jun 10, 2015, 07:06 PM
#11
straight cut gears do nothing but ad noise. side load on gears is not the problem. its the small shaft on oil pump drive that gets side loaded into the input housing. stiff valve springs. lightweight clutch assemblies, over tightened belts and possibly kevlar belts are most of the problem. a good polish and debur of the pump is about the best thing out to prevent. machined down balance shaft is waste of money as well and does zero to prevent.
Curious about the lightweight clutch assembly? Harmonics?
Jun 10, 2015, 09:15 PM
#12
Evolving Member
Join Date: Mar 2015
Location: Boring Oregon
Posts: 180
Likes: 0
Received 0 Likes
on
0 Posts
What I'm saying is for your driving the stock pump is fine for 9k
People that source alternate oil pumps are usually those at sustained 9k+ revs
Which is why I suggested previously that the stock unit is fine
I've been well above your revs an hp with a stock unit and had no failures
Jun 10, 2015, 11:16 PM
#13
Evolving Member
iTrader: (8)
Join Date: Oct 2010
Location: Toronto, Ontario
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
What are your guys thoughts on baffling the oil pan specifically around the pickup tube? Is something like the Buschur modified oil pan worth the money?
