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      10-28-2019, 11:43 AM   #2316
Xencer
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Drives: 2011 328i
Join Date: Jan 2018
Location: Atlanta

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Quote:
Originally Posted by bryanjb View Post
I've found this thread re 3SIM tuning really helpful. At Freedomfries88's suggestion, I tested my DISA valves, which lead to a long, strange trip with chinese aftermarket DISA valves.

I had the problem of oversize pins on the small (chinese) DISA, so I machined the pins down until the connector fit. Don't ask...

As for the large DISA, I am about to post this review on the cheezy chinese seller's products on ebay. This may seem extreme, but after wasting way too much time on this, its clear that there are only one or two chinese aftermarket manufacturers, but many sellers getting them bulk, maybe thru Shenzen connections, or Alibaba, or whatever. Just read before you buy...


SERIOUS PROBLEM WITH THESE AFTERMARKET DISA VALVES, SAVE YOURSELF

PROBLEMS AND READ!!!

After going around with this seller attempting resolution, I am

compelled to share what I found to save other buyers the same misery.

My BMW uses this DISA valve on the intake manifold. I found my old OEM

DISA valves were slow and didn't close or open fully. I used INPA

which has diagnostic functions that allow tests of many sensors and

actuators on the car. Both this DISA (left or large) and smaller were

replaced with aftermarket parts, both clearly chinese made.

I received this part from the seller autopartszone2008, AKA suretop,

AKA gaoshuoauto_6, (i will add others as I find them) in Feb 2019 and

was only able to test this in July 2019. Using INPA on my laptop, and

connected to the DISA connectors in my car, I was suprised to see the

large LEFT DISA *opens when commanded to close, and closes when

commanded to open*.

I have been very patient trying to resolve this with the seller, and

was sent a second unit in early August 2019 which displayed the same

problem. At this point, ALL CHINESE AFTERMARKET DISA VALVES MUST BE

CONSIDERED SUSPECT UNTIL TESTED WITH BMW INPA SHOP TEST PROGRAM!

Anyone with a three stage manifold that uses one of these DISA valves

will actually *hurt* the car's performance, and could conceivably

damage the car, as the controls will be adding fuel for intake

manifold conditions that are not present.

This seller is attempting to evade the fact that these DISA valves are

flawed and DO NOT OPERATE PROPERLY! They had me send back both flawed

units at my expense, but now are refusing to abide by our agreement

and refund my purchase $. Again, I never used either DISA they sent,

but only tested them to verify the flawed operation.

BUYER BEWARE! IF YOU HAVE NOT TESTED ONE OF THESE DISA VALVES, YOU

CANNOT BE ASSURED IT IS WORKING AS ADVERTISED!


BTW, I did get everything tested, verified operational, re-assembled, flashed, and running. And......

This is like a different car. Mileage is up from 24ish to over 27 without hypermileing, but the real difference is the WOT power is *VerY* noticeably improved.

I don't get here much, but I'd like to thank each and every poster who has contributed, but mostly the big guys that figured out how to hack the MSV-80, and pull out and make available the 330 tune.

Just a great project, challenging enough for me at the level I work, very nice results for the effort on my E91Xi.
This is very interesting because I have a 3stage intake manifold on my 328i with MILVs by cobramarty and a bpc tune and my WOT performance is shit, partial throttle and it pulls hard. Fucking weird. I bought new disa valves from ECS I think so maybe they are knock offs.