EGR VALVE BLOCK OFF PLATE

[Anonymous]

Yah...Yah I really did...

[geoffinbc]

but it does serve a purpose it cools the cumbustion chamber.

With extremely hot exhaust gas right?

It cools it because you are patially filling the chamber with inert gas that does not burn, nor does it aid in combustion.

So the resulting combustion is smaller and less heat builds.

[RednBlack]

Now, since there is no apparent benefit from this, if it works right, is there a downside? Will the car pass E Check? (If you have that in your state. If you don't, it's a mute point.)

[geoffinbc]

No it will never pass E-Check without EGR. NOx emissions will be too high.

The benefits of EGR (increased lean mixture and timing advance in cruise situations) are hard to ignore. Plus the concequences of removing a car equiped with it can be as small as a SES light or as bad and pinging and severe detonaion.

I would keep it and keep it working properly if it were my car.

[RednBlack]

At's what I thought. We used to pull all the emission controls off of cars in the early 80s. 6 months later, they came back totally fucked up. Everything was carboned up. Valves to the carb vacuum inlets.

[dbtk2]

My dad removed the EGR on his GTP, but the only reason he did that was to keep his supercharger & intercooler clean of the dirty exhaust gasses it puts back in there. With the EGR on there the intercooler would need to be cleaned every 15-20,000 miles to maintain its efficiency, without the EGR it only needs to be cleaned every 75-100,000 miles. Really, there is no performance benefit for removing the EGR because it isn't open at WOT anyways. The only thing it does is help keep the engine clean. If you don't have an intercooler core or something like that to keep clean then I don't see any reason to remove it honestly. It sure isn't going to help your gas mileage or emissions.

Shawn

[SappySE107]

Many people have passed with the EGR off, and one of the members here is failing emissions (NOx to be exact) and the numbers went DOWN with the EGR off. Go figure. Don't tell me it will never pass cause it has and will.

The performance advantage of the EGR off is simple. With it on, the exhaust gases collect as carbon deposits on the backside of the intake valve. This restricts the flow and also absorbs some of the fuel from the injector. Tell me that doesn't hurt performance! Also, my gas milage didnt change for me when I turned the EGR back in, which was a disappointment. There are exceptions, as my car was one. Normally you should gain a mpg or 2 with the EGR on because the digital EGR is what the fuel constant table is based on, and it lowers the constant with the EGR on which means it spits out less fuel when its engaged. My car just didnt care too much I guess. With vacuum EGR, there is no such change in the tables so it would take the O2 sensor to detect the changes and lean the injectors out to compensate.

[dbtk2]

Like Ben said, you can still pass emissions with no EGR. I know of someone with a GTP that passed the sniffer part of the CA emissions with no EGR, Headers that aren't supposed to pass CA emissions, and no cat, but it didn't pass due to it missing required emissions parts.

Over time having no EGR will be a performance benefit, but thats a long term thing, its not like you're gonna gain 5hp right away by removing it.

And, one oddball thing here, when my dad removed his EGR from his GTP his MGP actually went up 2mpg.

Shawn

[Anonymous]

Your dad's GTP doesn't haev an intercooler.

[JasonZ34]

get a chip and get it turned off from FFP so you don't get the stupid light. And leave the thing off.

BTW you will still polute when you clean out the intake with something like top cleaner.

[dbtk2]

Your dad's GTP doesn't haev an intercooler.

Yes it does Aaron...they don't have them stock but his has one. Thats why they run mid 14's stock and his runs 12.2's.

Shawn

[Anonymous]

Ah.

How do you intercool one of those?

[dbtk2]

You have to use an air-water type intercooler and put an intercooler core in between the supercharger and intake manifold. Then you have to run hoses from that core to a radiator in the front of the car. Then you fill it up with coolant and use a pump to circulate the coolant through the system. This way the hot air from the blower passes through the intercooler core that is filled with cold water, so the core cools down the air passing through, and the now hot water goes through the radiator on the front of the car where it gets cooled down by outside air and gets recirculated again. Its basically just like the engine cooling system, except it cools down air instead of an engine block. The system adds a lot of weight to the car due to the complexity of it, but allows you to run enough boost for about 40-50 more horsepower, so it more than makes up for the weight difference.

If you go to www.zzperformance.com you can look at the two intercooler systems they sell there to get an idea of how it works.

Shawn

[Anonymous]

I was thinking it'd have to be air to water. I see how it works, I just didn't know anyone had done that yet.

[dbtk2]

I was thinking it'd have to be air to water. I see how it works, I just didn't know anyone had done that yet.

They have been out for a while. My dad got his in April of last year, and the ZZP intercooler had been out for a good year before that. The thrasher intercooler (which is significantly more money, over $2k) was released like a year or two before the first ZZP one, so they have been out for like 3+ years now.

Shawn