Turbo 400 experts please step in....

[joespanova]

Originally Posted by Tom Goldman

One thing I'm surprised no one has mentioned is that most OE vacuum modulator feed lines have a restriction ,usually a crimped area in the tube to help regulate the speed in which the modulator responds to throttle changes .
Also , if you are using the short , small 2" diameter modulator , There are many different spring calibrations for different applications identified by the color stripes ,usually black ,white ,red , red-red ,red-black are common identifiers .
Each one has a different spring rating ,the external adjustment only addresses the range of that particular spring.

Exactly , and I have the single red stripe , dual red stripe , black stripe and on and on and on , and I have no way of knowing what's doing what ......in other words , apparently I have to try everything and then MAYBE.......LOL