Now that Lucky, my '70 S1 3500 is nearly ready for his trp to the rolling road, I thought I'd see if there were any quick and neat mods to help his breathing. This on the principle that changing the induction side after a rolling road set up will definitely generate another visit, whereas if I change the exhaust I will probably get away with it without resetting the engine.
Now the obvious thing to do is to throw away the Rover air cleaner cylinder and elbows and substitute a pair of K&N's mounted direst to the carbs. But in the first place I think it looks very chav and also I don't like having to sit and listen to induction roar. So I had a look round to see if I could do anything with the existing air cleaner box. Eventually I found this nice pair of K&N look alikes which bolt directly in place of the existing circular element with the addition of one extra rubber sealing ring against the end cap. The extent of the mods is to drill a hole in the end of the new filter and then find a longer screw to locate into the existing bridge piece.
The filter is an MPUAF9 from http://www.streetwizeaccessories.com/index.php which you are likely to find in local accessory shops. Advantage is a huge increase in the area of filter medium available for air to get through and elimination of the right angle turns inherent in the old circular filter. And nobody can tell from the outside! I may well go on to increase the diameter of the inlet trumpet to the filter box as well.
Chris
Now the obvious thing to do is to throw away the Rover air cleaner cylinder and elbows and substitute a pair of K&N's mounted direst to the carbs. But in the first place I think it looks very chav and also I don't like having to sit and listen to induction roar. So I had a look round to see if I could do anything with the existing air cleaner box. Eventually I found this nice pair of K&N look alikes which bolt directly in place of the existing circular element with the addition of one extra rubber sealing ring against the end cap. The extent of the mods is to drill a hole in the end of the new filter and then find a longer screw to locate into the existing bridge piece.
The filter is an MPUAF9 from http://www.streetwizeaccessories.com/index.php which you are likely to find in local accessory shops. Advantage is a huge increase in the area of filter medium available for air to get through and elimination of the right angle turns inherent in the old circular filter. And nobody can tell from the outside! I may well go on to increase the diameter of the inlet trumpet to the filter box as well.
Chris