Another 6 port bridgeport thread
Thread Starter
I'm in rotary heaven!
Joined: Dec 2006
Posts: 399
Likes: 0
From: jax
Another 6 port bridgeport thread
We got it running! Still breaking it in and it still has the stock ems, fuel system. I'm curious to see what will happen.
http://www.youtube.com/watch?v=fzQgzDVZcQs
http://www.youtube.com/watch?v=fzQgzDVZcQs
I got scared when I saw the drill holes. Seeing the finished bridges made me happier though. I was pretty suprised on how well it started and idled for being ran on the stock EMS and intake manifold. You really need to ditch that stock intake mani though. The S4 NA mani becomes a choke point on a SP motor over 7k, let alone a bridgey!
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
DO YOU THINK IT MIGHT BE A LITTLE LOUD?! (shouting to be heard over the exhaust 
).
Looks good though.
The stock ECU is going to be a major limitation in the sense that with ports like this, the stock ECU can be thought of as basically a carburetor. They will behave the same. You can expect horrid mileage down low, bucking, some hard starting and lack of power up top. A standalone will help a lot of that, but the mileage down low will always only be acceptable.
Another issue is the stock intake manifold. The DEI intake is designed to use the closing pulse from one rotor to force air/fuel into the opposite rotor through a horseshoe shaped secondary runner. With ports open all the time like a bridgeport, this won't happen. In fact the result will be a lot of exhaust forced into the manifold and major charge dilution. You can mitigate this a bit by gutting the dynamic chamber and simply using it as a plenum. But a far better solution is to use a different intake manifold...
).Looks good though.
The stock ECU is going to be a major limitation in the sense that with ports like this, the stock ECU can be thought of as basically a carburetor. They will behave the same. You can expect horrid mileage down low, bucking, some hard starting and lack of power up top. A standalone will help a lot of that, but the mileage down low will always only be acceptable.
Another issue is the stock intake manifold. The DEI intake is designed to use the closing pulse from one rotor to force air/fuel into the opposite rotor through a horseshoe shaped secondary runner. With ports open all the time like a bridgeport, this won't happen. In fact the result will be a lot of exhaust forced into the manifold and major charge dilution. You can mitigate this a bit by gutting the dynamic chamber and simply using it as a plenum. But a far better solution is to use a different intake manifold...
Trending Topics
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
Between the stock ECU and stock manifolds, I can't see this making much more peak power than a decent streetport, but I can see it making a lot less average power than one. Might as well call it a "noiseport"... 
Thread Starter
I'm in rotary heaven!
Joined: Dec 2006
Posts: 399
Likes: 0
From: jax
Well like I said in the beginning it is something to play with till he gets his turbo swap. So far from 3krpm to 4krpm it pulls hard, he isn't at the point where he can go over 4 krpm yet. He wants to turbo this engine but i dont like the idea.
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
Mar 28, 2017 03:30 PM
