Hi everyone, just wondering if there is a difference in running a 4-hole one-inch carb spacer vs. the open type? I've always used the totally open one, but now am reading that lots of guys are running the 4-holer. Also, mine is aluminum, but that would seem to conduct heat very well. Is there a plastic (or similar) one available that would isolate the carb better from the hot manifold? Regards,] Craig Stangohr/Aiken, S.C.
Here's my take on it... If you're running a dual plane intake and you want more top end, use the open. this eliminates the seperation between the two planes (effectively eliminating the purpose of using the dual plane) but allows it to breathe better on the top end. I think you can get spacers made out of phenolic or plastic that aren't as conductive. Plywood can be used, and is a very good insulator (do you have a router? You could get some gaskets and try out any type spacer you wanted to make).
Here's the spacer that's supposed to be the best from HVH Technologies: the SuperSucker: http://www.highvelocityheads.com/ss.htm
Four hole will give stronger signal to the carb. Better low end and mid range. I run a 4 hole on my 1050 Dominator, makes it act like a slightly smaller carb. Better for the street. Tried the SuperSucker but my 4 hole 1/2 in. ran just as well. Bruce
Been running an open half inch wood spacer (Moroso) under my Q-jet on the stock port matched manifold for years now. Runs fine - a little more top end. Carb runs cooler which is the main reason I put this on.
"Wilson" spacer What is a "Wilson" spacer and where do you buy one? Is there an advantage to a one-inch spacer over a one-half inch spacer? --Craig Stangohr/Aiken, S.C.
Generally more spacer the better but of course hood clearance can be a problem! Try www.wilsonmanifolds.com
