Danieln

iTrader: (1)

Hi mate,

You are satisfied from your perrin GM solenoid?

I want to buy also and I still not know what type ...

Do you need also something else except the solenoid?

How you tables are looking after you add perrin solenoid?

Thanks

I4UnderPressure

iTrader: (33)

Were there any tests done yet mrfred on the perrin solenoid or ingersoll rand solenoid (which I believe is the same as perrin)?

mrfred

iTrader: (50)

Sorry, but I never received one from anyone to test. I doubt its better than the GM. The GM strikes a very good balance between flow and pressure oscillation.

R/TErnie

iTrader: (32)

do you have any data from the mac valve and holding pressure?

mrfred

iTrader: (50)

There are several different models of MAC valves that can work as a BCS. The model that I tested was the highest flow of all the solenoids that I tested. However, in terms of maximum boost holding capability, what matters is the ability to bleed the maximum amount of pressure from the WGA diaphram. All three port solenoids (GM, Prodrive, MAC, Ingersoll Rand, etc) are equal in this capability because at 100% duty, they block air pressure from the boost source and allow the WGA diaphram to see atmospheric pressure (lowest possible pressure source).

The difference among the three port solenoids is the ability to be able to tune a wide range of WGA pressures when the BCS is cycling. Here the MAC did poorly because the high flow rate means that even with a low duty cycle, its still bleeding a large amount of pressure. The high flow rate also causes the WGA diaphram pressure to go through wide pressure swings as the solenoid opens and closes.

03whitegsr

iTrader: (8)

Couldn't the use of restrictors reduce the fluctions?

A restrictor on the vent line and a sligthyl larger restrictor on the source line should reduce the fluctions.

I guess the only reason for doing this would be to use the less expensive MAC valve. May also reduce the amount of air bleed off which would reduce the size of the "leak" that the boost controller causes.

mrfred

iTrader: (50)

Yes, restrictor pills could be used. Someone would have to figure out what size pills worked best. Another thing to keep in mind with the MAC solenoids is that their standard design is rated to work in temperatures up to only 60C (140F). The OEM mounting location for the BCS will definitely see higher temperatures than 140F during routine operation. Not trying to knock the MAC solenoids but just pointing out their limitations.

03whitegsr

iTrader: (8)

Yeah

I know my old AVCR had what looked like a relabeled MAC valve and I had nothing but issues with that boost controller.

I've got a MAC valve sitting around that I inteneded to setup ECU controlled boost with. If I ever try it out, I'll post up about how well it actually works. Good luck to anybody else using one.

fostytou

iTrader: (15)

Mine seems to work relatively well, but I haven't tuned any other BCS on an evo to know for sure. I bought a gm just for the hell of it but I haven't had a chance to put it in yet.

R/TErnie

iTrader: (32)

I run my MAC valve with a .040" restrictor.

I've just determined that I've maxed out the FP Red and there isn't much more i can do about it.

Clipse3GT

iTrader: (10)

Is there any plans to test a GRIMSPEED Valve (glorified MAC valve) and a PERRIN which is supposed to be another glorified MAC valve?

I am just wondering... I have evoDynamic's MAC valve and I am debating whether or not get a GM/AC DELCO boost solenoid?

Is there any difference between a GM and AC Delco solenoid are they both exactly the same?

EDIT: I just tested my EVOdynamic's MAC valve it is has a resistance of ~31 Ohm.

mrfred

iTrader: (50)

If someone sends me one, I'll test it.

GotWheelHop

iTrader: (39)

Thought you were going to disassemble your setup you had for testing?

FYI, that MAC that I sent you is still sitting in the box you shipped it back to me in about 3 feet from my keyboard.

*edit* After looking at that GrimmSpeed valve they have listed, it looks IDENTICAL to the one I sent you for testing.

mrfred

iTrader: (50)

Wassup. :-) Thanks for sending the MAC back then. My Prodrive 3-port that I bought is sitting in a box too. Seems that GM does at least one thing right. Yeah, the BCS benchtop testing setup is completely dismantled, but I can put it back together within a few hours. I have one of the OEM EGR 3-ports I'm going to be testing for Bryan soon. Wouldn't be much extra work to test the GrimmSpeed if someone was willing to send one.

MAC has a variety of options with their 3-ports, and I believe that GrimmSpeed had some custom specs, so I suspect it does behave a bit differently than the AEM MAC.

GotWheelHop

iTrader: (39)

I hope that the EGR solenoid works. I now have a surplus one sitting in my garage after switching to the new v7 rom. Hehe.

As for the GrimmSpeed one, kudos to them for not taking an off the shelf unit and rebadging it, like many other companies have done.

Come back to Vegas soon. I'll let you behind the wheel of a big turbo'd evo and buy you some more