position for ITB vacuum reading

[Inline__engine]

I'm going to add some nipples into an intake manifold for purposes of using a carb sync tool for balancing throttles using vacuum signal. Is there any guideline on where to put them? i have 6 " of length between blade and head.

i presume you dont want them to be too close to the throttles, but maybe im wrong and it doesnt matter ?

cheers

[Inline__engine]

i was just worried that if they were close to the butterflies then unless they were each exactly positioned in the same position around the circumference and distance from the blade that it was more likely to introduce variation, as looks quite chaotic just down stream of the throttle in CFD ive seen

i can get it about 5/8"-->3/4" downstream from throttles, presumably on the bottom is ok to as the injectors and connections are sort of in the way on top unless i put them in at a slight angle

https://i.ytimg.com/vi/m2IzJlaEu9Q/hqdefault.jpg

thanks

[Inline__engine]

ok thanks everyone, i normally sync with the syncrometer but its handy to be able to get a reading without disassembling airbox and everything.

do people have a preference for syncing by vacuum or syncrometer?

[Inline__engine]

i have a gauge http://www.carbtune.com/ for each cylinder, has a small pin sized orifice piece that goes in the hose to filter fluctuations