What happens when you try to run without the throttle opener with the Hitachi HJG46W (round tops) carbs? I have a 74 260Z and I'm looking at different mods like getting rid of the EGR and the air injection system along with the throttle opener.

Britt Boyette

I think you are speaking of the diaphram type opener.You'll never miss it.Make sure you plug the vacuum line.If I recall that was a throttle closer not opener.When you let off the gas it slowly closed the throttle.I trashed mine in the '70's and haven't miised it since. Have fun! Daniel

Thanks, that baby's outta here!

Britt