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| Re: A12 Turbo Development thread |
Subject: Re: A12 Turbo Development thread
by sikyne on 2012/11/14 20:26:54
I understand SR`s and CA`s make max resrtictor hp with standard manifolds. As you know, the A series probably will not using standard manifolds. Custom manifolds have to be made. These manifolds are not big. The exhaust manifold has a runner ID much smaller than the ports(26mm) and the inlet runners have an ID of 40mm, tapering down over the last 150mm to match the larger than standard ports. The problem with more traditional looking manifolds(small plenum and TB at one end) is ensuring even distribution to all cylinders. OEM manufactures spend a lot of time and money getting this right. with custom manifolds the easiest way to ensue even distribution is by having it symetrical with the TB in the middle. Large plenums also help.
I certainly agree that the plenum on this one is too large. But i am confident of fairly even distribution between the cylinders.
Oda, why is having the injectors pointed at the back of the valves the way to go over staged injection? The TB is a lot smaller than 66mm.
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