Finally found pictures of different single turbo manifolds for a 20B. Thought I would get them up on here as a few people were interested when Mir was asking about designs for his manifold.
(http://i1215.photobucket.com/albums/cc507/grantmonkhouse/17ef7b38.jpg)
(http://i1215.photobucket.com/albums/cc507/grantmonkhouse/3eef7f2b.jpg)
(http://i1215.photobucket.com/albums/cc507/grantmonkhouse/85835617.jpg)
The first is an unequal length mani, but gets exhaust up, around and out of the turbo fast.
The second is equal length runners to an non divided flange.
The third is an equal length divided manifold. The centre runner is split between runners 1&2.
in the middle pic whats that purple thing and what does it do. that looks pretty cool
Quote from: wolfie1;807607in the middle pic whats that purple thing and what does it do. that looks pretty cool
thats a wastegate. controls the amount of boost the turbo produces. it is basically a valve that opens once your intended boost pressure is reached. it will open and close constantly to maintain the boost at that level.
i think my mates noble he had had 1 of these, does it when you reach a certain rpm keep it at max boost so when you nail the throttle it just flies?
Quote from: wolfie1;807620i think my mates noble he had had 1 of these, does it when you reach a certain rpm keep it at max boost so when you nail the throttle it just flies?
nope. it is control for how much boost a turbo makes.
boost is how much air is being forced into the engine by the turbo. if you didnt have one of these the turbo would keep forcing greater and greater amounts of air into the engine
Grant once my manifold arrives, I will be starting a group buy for 20b single turbo manifold. I was thinking of 26" equal length, but after speaking with Rotary gurus like Pip and American architects, I am a firm believer that- No matter whether you have a 20b or 26b or a 13b manifold, firstly, they have be equal length and secondly, they have to be nearer to the exhaust ports in order to avoid a lag as in the long runners heat energy escapes at certain degree, hence people heat wrap there manifold.
Longer runners are good for NAs not turbo powered cars
I have done so much research on this topic that, one can not imagine :).
My manifold is going to be 20" (100%) equal runner with 62mm of diameter. It is rated for 1200 RWHP guaranteed and it would handle any power you throw at it. Oh forgot to mention that it will also have three independent EGT holes. Loll
I will upload the pics when it arrives
Cheers
Mir