Originally Posted By: E150GT
do those restriction gauges work on any size engine? I put one on my mazda that reads up to 25" of Hg I think but it initially sets at about 8" with a new filter. Should I let it go all the way to 25"?
Yes, they work on any size engine. It reads the restriction, thats all they do. If you have a restriction with a new air filter then I'd try to find where its coming from. On my S2000 I found that the stock opening was to small from the factory.
ROD