ok, just got the car back today. When I first got it, (3miles on engine) it ha vac at 19-20 vac. now with 20 miles on it it seems to idle at 17-16 vac. is that normal for it to go down?

 

is the new motor ported? we need more info on mods.
Jeff

 

sorry, no its not ported.
99 spec twins
greddy 2 row fmic
koyo rad
d2 down pipe
stock cat
racing beat single tip cat back
supra tt fuel pump
efini y pipe
hks racing suction intakes
greddy pully kit
air pump removed...

i think thats it for performance mods

 

If you are worried, why aren't you calling your builder/mechanic before posting here?

 

AWD-RWD racer,

You also need to post your idle rpm. Your vacuum reading will vary depending on your idle rpm. Honestly though, I really wouldn't worry about it until you have put a couple hundred miles on it unless you are having other problems (i.e. bogging and cutting out).