MONZTER

Devcon - Not on the intakes, I'll weld before that, but to fill the port floors in with the raised intake ports yes. Its actually Manley 2 part epoxy material specifically for the job (probably made by Devcon) TWM also used to make thin CNC throttles like only 20mm wide, but I had these already and one set of injectors far back were already there.

So I modeled up a quick plenum to see how the shape of the horn would interact with the shape of the plenum. The shape is no where final, just to show the ideas. I am thinking the square ones are looking smoother and more streamlined (less flat bottom) What are you guys thoughts? I just started doing research into the plenum shape and volume. Do you guys have any link suggestions for good reading on the subject? I have read all I can find on the forum here. Good stuff Thanks Jeff

Tim was correct, The throttles were made from pieces starting with a set of TWM 46mm bodies and intake. The flange was cut off the intake runners and then the runners were seperated and machined at 20 degrees to improve the entry of the runner into the head as well as increase the distance from the header to the bottom of the bodies (less heat). I made the flanges to be 4 bolt instead of 6 bolt for the purpose of adding a second set of injectors in the flanges pointing right at the back of the valves. The parts were all welded up and then smoother out to look like cast again. I added a bunch of material to the inside radius of the runners to smooth them out as well as giving more material to straighten out the inside of the runner. The path is much straighter than it looks from the outside. The flange mounted injector bosses are not welded in yet, they will be smoother in as well. Here are some pics of the process. Sorry if there are too many pictures. Jeff