Is an upgraded oil pup worth it or not?
19 January 2016, 08:46 PM
#1
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Nov 2014
Location: Stoke
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Is an upgraded oil pup worth it or not?
I've done some searching and still can't make my mind up to be honest.
As I've posted else where a simple she'll replacement on my STI UK has become a full rebuild with uprated bearings, new crank as that's marked heavily and I've ordered wiseco pistons and manley rods today as the pistons were scored slightly as well.
So do I need an uprated one when going for around 450bhp or will the stock STI item do the job?
Answers on a postcard are fine, but here is preferable
As I've posted else where a simple she'll replacement on my STI UK has become a full rebuild with uprated bearings, new crank as that's marked heavily and I've ordered wiseco pistons and manley rods today as the pistons were scored slightly as well.
So do I need an uprated one when going for around 450bhp or will the stock STI item do the job?
Answers on a postcard are fine, but here is preferable
20 January 2016, 09:00 PM
#4
As mentioned definitely replace the pump.
As you are probably aware builders tend to use 10mm 11mm 12mm.
Bigger is not necessarily better.
It is all down to the spec of the car, as to how much oil needs to flow. For example does it have AVCS heads? What size oil cooler? and so on.
What bhp you run has nothing to do with it. However higher BHP cars tend to have bigger pumps as they tend to have a bigger spec with more oil to flow.
You need to post the exact spec of your build up and then someone can advise to what size pump you sould go for.
Cheers
Steve
As you are probably aware builders tend to use 10mm 11mm 12mm.
Bigger is not necessarily better.
It is all down to the spec of the car, as to how much oil needs to flow. For example does it have AVCS heads? What size oil cooler? and so on.
What bhp you run has nothing to do with it. However higher BHP cars tend to have bigger pumps as they tend to have a bigger spec with more oil to flow.
You need to post the exact spec of your build up and then someone can advise to what size pump you sould go for.
Cheers
Steve
22 January 2016, 10:08 PM
#5
Scooby Regular
Id have a read about the uprated / modded pumps. Something about the pressure relief valve sticking and causing oil pressure drop. Stick to standard. I am running 440 and having no pressure issues with 15w50 oil.
Trending Topics
25 January 2016, 07:34 AM
#8
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Nov 2014
Location: Stoke
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Ta very much gents. Decided to get a new genuine 11mm oil pump so that should do the job.
Just waiting for my rods and pistons to arrive now and it can all go back together.
Just waiting for my rods and pistons to arrive now and it can all go back together.
25 January 2016, 10:09 AM
#9
some of the "modified or uprated" pumps are nothing of the sort and IMO aren't worth the costs involved - we tend to use/supply either OE or RCM variants (correctly modified)
most pertinent thing is to select the correct size for YOUR application..........
all in stock at very good deal costs
most pertinent thing is to select the correct size for YOUR application..........
all in stock at very good deal costs
27 January 2016, 01:31 PM
#10
Former Sponsor
Join Date: Aug 2012
Location: Holywell
Posts: 571
Likes: 0
Received 0 Likes
on
0 Posts
As already said, don't go too big, alot of People think a 12mm Cosworth pump is the ultimate, but the 12mm pump is designed for the extra qty or oil required to operate the dual avcs (Hatch STI). Ive seen a few engines go bang becuase the relief valve has stuck open. This is because it's trying to pump more oil than the engine requires.
11mm std Subaru is my suggestion for all but dual avcs engines.
PS check the back plate is tight ;-)
11mm std Subaru is my suggestion for all but dual avcs engines.
PS check the back plate is tight ;-)
27 January 2016, 01:39 PM
#11
Scooby Regular
As already said, don't go too big, alot of People think a 12mm Cosworth pump is the ultimate, but the 12mm pump is designed for the extra qty or oil required to operate the dual avcs (Hatch STI). Ive seen a few engines go bang becuase the relief valve has stuck open. This is because it's trying to pump more oil than the engine requires.
11mm std Subaru is my suggestion for all but dual avcs engines.
PS check the back plate is tight ;-)
11mm std Subaru is my suggestion for all but dual avcs engines.
PS check the back plate is tight ;-)
I am running the standard 11 and will be running a 16row. Can always jump from 15w50 to 15w60 if I seen an all round pressure drop with the oil cooler
