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Old 05-23-2013, 09:06 AM   #26
wrxadam05
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Updated - Before installing make sure that everything is tightened down PRETTY tight and use sealant on the hex nut on the center of the pump and torque down TIGHT!.

Also, I would recommend throwing in an OEM crank seal. I always feel comfortable with OEM seals over aftermarket.

(Thanks to [email protected] for the heads up on this)
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Old 06-03-2013, 04:29 PM   #27
weps
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I'm guessing this would be overkill for us non-avcs folks?
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Old 06-07-2013, 11:07 PM   #28
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Since using a few of these, no issues yet. Pretty happy so far
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Old 06-10-2013, 02:14 PM   #29
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Yeah I just talked to Larry Berger over there and I'm going to order a couple, one for myself
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Old 06-11-2013, 05:12 PM   #30
KillerBMotorsport
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I posted this in another thread, but since it's relevant here....

Not to pollute your thread too much, but we've been doing some pump comparisons over here. Some things to note...

The ACL pump uses a cast aluminum back plate not steel like OEM. It is thinner by 2mm to accommodate the thicker rotors. It's also a bit thinner around the c'sinks. I have strength and pressure retention concerns with this vs the thicker steel version.

The ACL housing is obviously a knock-off as EVERY casting mark is the same, minus the date, lot and QC codes you'd get on a genuine part. The product reflects it's price.

I hope to have actual flow pressure data vs the OEM 12mm within the next 3-4 months. I won't run one until we test it off the car. I REALLY hope ACL did actual in-house testing as it often doesn't bode well for products that use their markets to test products.

From Left to right: OEM JDM12mm, Cosworth, OEM USDM 10mm, ACL


Here's how ACL fit the 12mm rotors, by using a 10mm housing. The JDM OEM 12mm pump actually uses a thicker housing to match the thicker rotors. The ACL pump does have better milling going into the outlet port.


And here's how they make it fit, bore 2mm out of the back plate. Not the OEM 10mm steel back plate in the background. ACL version is cast aluminum and thinner at the rotors.


Here's a shot showing how the ACL c'sinks are deeper, thinning the material around it.


For those who have not seen a Cosworth (sorry for the crappy pics), this is what you're paying for with 'porting'. The areas of the casting I like to 'clean up' aren't touched and very little material is removed. It looks more like a 3 minute job with a small wire wheel. I was disappointed the first time I opened one up and there were definitely no ooohhh ahhhh moments.



More to come at a later date.
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Old 06-18-2013, 03:27 PM   #31
wrxadam05
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Thanks for the contribution. I'm going to be doing a volume measurement on the ACL versus 11mm, just to have the data.
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Old 06-18-2013, 07:07 PM   #32
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Quote:
Originally Posted by wrxadam05 View Post
Thanks for the contribution. I'm going to be doing a volume measurement on the ACL versus 11mm, just to have the data.
No problem. The ACL rotors are the same as the JDM 12mm. Since the rotors determine flow capacity, see JDM pump specs for flow/pressure data. Going off ACLs 'fluffy marketing specs' and lack of having actual flow data, I expect a pseudo copy/paste from JDM specs is where their info comes from
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Old 06-19-2013, 06:44 PM   #33
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Yea, only difference is it appears they applied some DFL coating to the inside of the gears. Doubt that makes any difference.
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Old 07-03-2013, 12:22 AM   #34
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so anyone have any issues with the ACL pump at all? from the looks of it, seems to be a knock off of the JDM 12mm oil pump.
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Old 07-03-2013, 11:03 AM   #35
Crystal_Imprezav
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So far so good. It is not a knock off of the JDM pump, it is a knockoff of the Cosworth High Volume pump. 10mm pump with a 12mm gear.
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Old 07-03-2013, 11:41 AM   #36
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Quote:
Originally Posted by Crystal_Imprezav View Post
So far so good. It is not a knock off of the JDM pump, it is a knockoff of the Cosworth High Volume pump. 10mm pump with a 12mm gear.

so in your honest opinion would you recommend it to anyone?
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Old 07-04-2013, 09:03 AM   #37
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I'm surprised moroso or mellings hasn't jumped into this market before acl. I was just thinking about the recirculation with the larger pumps. Would it be possible to build a valve to remotely bypass the excess volume/pressure way downstream in the oil system and simply block of the bypass in the pump?
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Old 07-04-2013, 09:06 AM   #38
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Originally Posted by VTsuby View Post
I'm surprised moroso or mellings hasn't jumped into this market before acl. I was just thinking about the recirculation with the larger pumps. Would it be possible to build a valve to remotely bypass the excess volume/pressure way downstream in the oil system and simply block of the bypass in the pump?
Bingo. I was wondering the same.
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Old 07-04-2013, 12:59 PM   #39
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Quote:
Originally Posted by VTsuby View Post
I'm surprised moroso or mellings hasn't jumped into this market before acl. I was just thinking about the recirculation with the larger pumps. Would it be possible to build a valve to remotely bypass the excess volume/pressure way downstream in the oil system and simply block of the bypass in the pump?
Already have it
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Old 07-04-2013, 01:30 PM   #40
Tyrial
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So which one is the best to run with then?
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Old 07-04-2013, 01:57 PM   #41
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Quote:
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So which one is the best to run with then?
There is no real answer for that question without knowing build tolerances and specs and target rpm.

Bearing clearances?
AVCS? Dual AVCS? No AVCS?
Piston oil squirters?
Target rpm?
Custom or modified crank?
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Old 07-04-2013, 03:42 PM   #42
VTsuby
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something like this?
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Old 07-04-2013, 03:45 PM   #43
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Quote:
Originally Posted by VTsuby View Post
I'm surprised moroso or mellings hasn't jumped into this market before acl. I was just thinking about the recirculation with the larger pumps. Would it be possible to build a valve to remotely bypass the excess volume/pressure way downstream in the oil system and simply block of the bypass in the pump?
Yes. Plug the OEM bypass because it sucks. Adjustable pressure bypass routed back into the sump. I don't know who would be doing it this way
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Old 07-04-2013, 03:48 PM   #44
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Originally Posted by VTsuby View Post


something like this?
Almost. Design and build it into the unused pumps output port so you're only adding one line, not 3.
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Old 07-04-2013, 03:56 PM   #45
VTsuby
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I smell what your stepping in, your pan has a nice extra bung on it that would be good for this
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Old 07-08-2013, 09:25 PM   #46
Tyrial
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Quote:
Originally Posted by KillerBMotorsport View Post
Yes. Plug the OEM bypass because it sucks. Adjustable pressure bypass routed back into the sump. I don't know who would be doing it this way
Going to make something for us KB?
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Old 07-08-2013, 09:33 PM   #47
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Going to make something for us KB?
I know he is because he's been hinting at this for quite some time. Knowing him it's gonna be pretty trick too. The question is WHEN?
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Old 07-09-2013, 12:42 AM   #48
Tyrial
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I know he is because he's been hinting at this for quite some time. Knowing him it's gonna be pretty trick too. The question is WHEN?
/waiting
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Old 09-23-2013, 10:24 AM   #49
brianglawson
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waiting for some more review results
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Old 09-23-2013, 10:34 AM   #50
wrxadam05
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I ended up getting into a rush to get my car together so I could sell it. Everything is together and working well. Great pressure and so far no issues.
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