Okay, so I've been searching around the site alot, but I'm still not 100% sure on what to do about this:
I e-mailed Aaron at WierRacing and he said that he would be willing to make me a DCOE intake manifold for my A20. At $300, I figure that I can't go wrong buying it right now, even though I don't have the dual carbs yet or even the engine built.
He is asking me a few questions as to what specs I would like it made to.
First off, he was asking me the angle I'd like the runners at. I read that you want them tilted forward 5 degrees. I can't find anywhere the angle that the engine is tilted forward, though I KNOW I've read it here on the site. I get the feeling that it's tilted around 25 degrees forward, so I would want the flange welded at 20 degrees, as Aaron said he had done one before.
I also am not 100% sure about the runner length. I know that if they're a bit longer that I'll get more bottom end torque, but I don't think I have the clearance for anything longer than 2 inches.
I measured out the clearance to the brake booster and there's only about 11 inches. So I figure, the carbs are 5.5 inches long, with 3 inch filters / velocity stacks and maybe an inch (to be safe) for the flanges, that only really leaves me about 2 1/2 inches on the runners if I squeeze it. So I thought I'd have them done 2 inches long to be safe.
Also, he asked about running 40's or 45's. I figured I would just go ahead and go with 40's. From what I've read, I can't really utilize 45's on this engine, because I at least want SOME streetability.
So here's what I plan on telling him for mine upon some good approval from you guys:
20 degree tilt on the intake manifold flange
2 inch runners
40mm ports
Sound ok? Thanks for the help!
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