I will be installing the T66 and new engine next weekend...

I was wondering if I exhaust dumps are a good idea or no. What I was thinking of doing is just welding in a "V" pipe after the DownPipe. On end will go through the rest of the exhaust system. And one will dump into the atmoshpere. The dump will remain closed until I open it. So I was wondering if exhaust gases will be redirected back up the "V" when the dump is closeding some sort of compressor surge that will go back up and reck the exhaust tirbine?

- Edan

 

Anybody...?

 

I am not sure, but I beleive you need a different "tune" to the fuel map when you change something that drastically.

You might overboost from no back prssure, run lean, and
"pop" goes your wankel.

 

I hadn't even thought about that possiblity of needing to run a different map... Okay say, I only open the dump when I am at the track and have the laptop in the car and I change the map...

Okay problem solved.
f
But will I reck the exhaust turbine... From the disruption in exhaust gas flow.

Edan

 

Track officials might tell you to take a hike. If you go out for the street legal nights they probably want a full exhaust w/ muffler. Least they say they do here. And a rotary with no muffler and a big turbo should be a lot louder than the american V-8s they made that rule for.

People make 500 hp with a T66 and a muffler. You don't really need that cutout.

 

Yeah but come on... Seriously think about pulling up to that Viper GTS at the stop sign. And the guy looking over and thinking to himself. What the **** is this ricer gone do try to beat me. He revs his engine, okay its decently loud. Then I hit the switch open the dump. And leave the guy speechless wondering why he can't hear his car.

Plus I should recieve better boost response.

But will I have a problem like compressor surge

 

If you have an open wastegate you'll have the same effect. Only it will be under boost at least.

Civics are incredibly loud when you take the exhaust off too. Let's not be thinking louder is faster, that's ricer talk!!

 

Yeah but come on... Seriously think about pulling up to that Viper GTS at the stop sign. And the guy looking over and thinking to himself. What the **** is this ricer gone do try to beat me. He revs his engine, okay its decently loud. Then I hit the switch open the dump. And leave the guy speechless wondering why he can't hear his car.

Plus I should recieve better boost response.

But will I have a problem like compressor surge

 

NO, louder is not faster. But less exhaust on turbocharged car will allow you to build boost faster and have better response.

And NO ******* **** LOUDER does not mean faster. And no civics are not even with no exhaust system. They are plan shitty!!

 

Turbos actually muffle the exhaust volume...

 

Let me get this straight. We are not talking about a wastegate dump, but an exhaust dump right? When the dump is closed it will act just like "regular" exhaust with muffler. Compressor surge happens on the intake side, not the exhaust side. So, I don't think what you are describing will make any difference. Incidently, you don't need to worry about compressor surge unless you don't have a BOV. I guess in theory a dump tube would equal less backpressure, therefore you run the risk of being lean, or having boost spike, between the two setups, as mentioned.

 

your boost wont stick, you will have to run a different map, the car will sound like ****, you will always have a exhuast leak(if dont go and by the electric dump), in other words, no, find better way to make hp.
I have a friend who took his off of his turbo buick. He had all the problems mentioned above.

 

Okay... I haven't read this thread in a while and thought it would have been gone... But...

Yes ocourse you get compressor surge on the intake side... But I was wondering if this disruption in flow would create it...

And I did not say that the dump would great better hp... But theoretically it should allow you to have better boost response... O well **** it... I am buying the y pipe from summit and the electric dump, yeah the one everybody read about a couple a months ago in HOT ROD magazine...

-Edan

 

what was the name of the one in hot rod mag? and where do you get it from? summit?

 

and then the viper will still smoke you.

 

I really hope you get tunned before it turns cold

 

No.

 

viper... probably not...