11:1 too high for pump gas?

Thanks for the advice everyone. Looks like 11 to 1 is totally doable, but you better have everything tuned in perfect. Since this is a streetcar, I like the idea of having a margin for safety before things start detonating. I think I will do as I did with the last build, leaving the compression at 9.8 to 1. That saves me a little cash too.