custom/modified rear intake manifold
Posted: Sun May 28, 2017 12:45 am
I have a '78 SD which has intake manifolds with 52mm stud spacing. I would like to fit larger carbs than the 32 PHM but when I do (using rubber couplers from Malossi), the rear carb sticks out of the frame so I can't use the sidecover. I think I read somewhere where someone trimmed down the flange on the manifold for this purpose, but I have issue with destruction of an original part.
I discussed this problem with our gracious host Steve, and he mentioned using a front cylinder manifold on the rear to address this problem. Unfortunately, both my front and rear manifolds are identical. I referenced the parts manual and the part number for both the front and rear manifolds is the same. Steve also mentioned that his SSD has a spacer on the rear manifold that rotates the manifold 90deg CCW, pointing the carb rearward, but I don't think this would work with my bike because of the 52mm stud spacing.
Does anyone have any experience with regard to this? Is there perhaps a compatible manifold from another bike that can be used in place of the original? Surely I'm not the only one who has experienced this issue, so I am appealing to the knowledge of the community here for ideas.
Thanks in advance for any/all replies.
I discussed this problem with our gracious host Steve, and he mentioned using a front cylinder manifold on the rear to address this problem. Unfortunately, both my front and rear manifolds are identical. I referenced the parts manual and the part number for both the front and rear manifolds is the same. Steve also mentioned that his SSD has a spacer on the rear manifold that rotates the manifold 90deg CCW, pointing the carb rearward, but I don't think this would work with my bike because of the 52mm stud spacing.
Does anyone have any experience with regard to this? Is there perhaps a compatible manifold from another bike that can be used in place of the original? Surely I'm not the only one who has experienced this issue, so I am appealing to the knowledge of the community here for ideas.
Thanks in advance for any/all replies.