Morning all! My Z has currently been using 1.0mm boost jets on modded upgraded turbos and i've been looking for a boost increase up to about 16/17 psi...

 

My current 1.0mm boost jets are shoved so far down the pipe that I can't get them out... If I shove in some 0.8mm ones as well as having the 1.0mm jets, is this likely to cause any probs or is it the same as having just 0.8mm ones in there due to the hole size being smaller??? Bit of a silly question but don't wan't it boosting to 21psi with both sets of jets in there!!!

i wouldnt recomend it bud

 

it wouldnt boost to 21 psi, as in theory your going down in size, then air is passing through a larger hole, meaning wastegate should stay open to required boost with 0.8s but if theres to much restriction with all the jets you could potentially cause engine damage or turbo at best.

 

IMO

 

greg

i wouldnt recomend it bud

 

it wouldnt boost to 21 psi, as in theory your going down in size, then air is passing through a larger hole, meaning wastegate should stay open to required boost with 0.8s but if theres to much restriction with all the jets you could potentially cause engine damage or turbo at best.

 

IMO

 

greg

 

Thanks greg, they are already in my Z and i've driven it around but not floored it yet... What's the best way to do a quick test to see what max boost i get? Would it better to give it a go in 5th gear and watch the boost build and see if I get dettination or a lower gear??

I don't don't see any problem with having two boost jest of different sizes, but I do think you are setting your boost too high.

I don't don't see any problem with having two boost jest of different sizes, but I do think you are setting your boost too high.

 

I'm gonna give at a quick go later but if i hear any pinking going on then i'm gonna take the 0.8 jets outs!! Just gonna give her a quick blip as I know i've got the turbo's and fuel flow to take it but not gonna hold it on boost if I hear any detination going on... Thanks for your advise though Andy... I promise i won't come crying if it goes pop!