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Atrus
Jedi Warrior
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So, per my EFI project, I will need a different manifold if I go my single TB route. I’d prefer a downdraft setup for various reasons, but can just do a sidedraft if necessary...
1) Weber Manifold – know of any for sale cheap? I don’t want the carb, I just need a manifold to bolt my single TB to. If I go this route, can anyone tell me what the height of a weber carb is, with and without the air filter? Concerned about bonnet clearance. This seems to be my easiest route as I’d just need an adapter plate. Also, how is the Weber in terms of performance? I am thinking to the future, when I want to do some headwork, cam, etc. FYI, I don’t see myself buying an aluminum or other head, I plan on working the stocker as much as possible (or monetarily feasible!!!!!)
2) Single HS4 manifold…I am using a single 2.125” diameter TB. I suppose the HS4 manifold could be a good sidedraft candidate, as long as the two branches of the manifold are acceptable from a performance standpoint. I’d either axe the standard mount and weld in my fabricated one, or build an adapter plate. Any opinions on this?
3) Custom manifold…what does the “bowl” just below the carb look like on the intake manifold? Is there any type of divider or diverter into each branch, or is it just a wide open cavity? I was considering each method – a single open cavity, or using exhaust tubing cut and welded to make a “W” shape. The open cavity, I’d imagine, would have more turbulence and may atomize fuel more efficiently. The “W” would probably have less turbulence, but it’d direct air down to each port better. Any thoughts? Lastly, I was considering dropping the TB portion of the manifold down slightly to have more bonnet clearance (if needed). In this case, the runners to each port would have to flow upward. Any issues you’d see with this? Seems to me most setups are in a downward approach, so I don’t know if I’d have issues with gravity. I was thinking I wouldn’t because there’d be a vacuum pulling air/fuel into the cylinder, so it’s not like it solely relies on gravity to be fed. On the other hand, I don’t want fuel just pooling up in the intake, that spells disaster!!!!
Thanks all, I value your input!
1) Weber Manifold – know of any for sale cheap? I don’t want the carb, I just need a manifold to bolt my single TB to. If I go this route, can anyone tell me what the height of a weber carb is, with and without the air filter? Concerned about bonnet clearance. This seems to be my easiest route as I’d just need an adapter plate. Also, how is the Weber in terms of performance? I am thinking to the future, when I want to do some headwork, cam, etc. FYI, I don’t see myself buying an aluminum or other head, I plan on working the stocker as much as possible (or monetarily feasible!!!!!)
2) Single HS4 manifold…I am using a single 2.125” diameter TB. I suppose the HS4 manifold could be a good sidedraft candidate, as long as the two branches of the manifold are acceptable from a performance standpoint. I’d either axe the standard mount and weld in my fabricated one, or build an adapter plate. Any opinions on this?
3) Custom manifold…what does the “bowl” just below the carb look like on the intake manifold? Is there any type of divider or diverter into each branch, or is it just a wide open cavity? I was considering each method – a single open cavity, or using exhaust tubing cut and welded to make a “W” shape. The open cavity, I’d imagine, would have more turbulence and may atomize fuel more efficiently. The “W” would probably have less turbulence, but it’d direct air down to each port better. Any thoughts? Lastly, I was considering dropping the TB portion of the manifold down slightly to have more bonnet clearance (if needed). In this case, the runners to each port would have to flow upward. Any issues you’d see with this? Seems to me most setups are in a downward approach, so I don’t know if I’d have issues with gravity. I was thinking I wouldn’t because there’d be a vacuum pulling air/fuel into the cylinder, so it’s not like it solely relies on gravity to be fed. On the other hand, I don’t want fuel just pooling up in the intake, that spells disaster!!!!
Thanks all, I value your input!
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