You will need a longer coupler and studs. I wouldn't recommend stacking them. A 2" spacer will be less work and you can sell the 1" spacer or keep it for future testing.
I have a set of 2" spacers on my boat with 2005 XR drives now, but I might end up going to 3" spacers if they work better for me. If the 3" spacers work for me, my 2" spacers will be for sale.
I have a set of 2" spacers on my boat with 2005 XR drives now, but I might end up going to 3" spacers if they work better for me. If the 3" spacers work for me, my 2" spacers will be for sale.
For testing purposes we stack spacers. Of course you have to use the proper studs and coupler. When we figure out what the proper drive height is then the proper spacer is installed. We are also careful to use the appropriate spacer for the application. We recommend certain spacer manufacturers over others for severe duty use, such as racing applications. Some spacers are built better than others and hold up to severe duty better than others. We have had customers lose lowers due to spacer component failure.
I have a Supercharged engine in a 1996 Cobalt 253. Over 600 hp and am able to do 73.5 with a 28p Bravo 1 at 5000 RPM Over 17% slip. Brett Anderson (bblades) says I need more bow lift but I am careful not to drop the cavatiton plate below the bottom. Is this right or can I go lower than 1/2" which makes the cav plate flush?