My twin turbo camaro goes 10 flat 140mph

PittSpeed Automotive PittSpeed Off Topic
21

-10 is roughly 5/8 so youre fine with that

those .68 are tiny compared to your big cube motor. Swapping to a .96 you wont notice the spool difference but they will allow you to carry youre RPMS further

get a BP guage on there and see what youre ration is. if you have too high of backpressure it can back up and push thru seals and etc. with you having a 400 cube motor and tiny .68 and high boost levels this sounds like youre issue. if you get new housings it should cure youre pressure issue. they will also allow you to actually seen a gain in psi as you climb up the compressor chart, since it wont be fighting itself

22

how/where do i put a pressure gauge on? On the return line?

maybe I should buy a vacuum pump and plumb that into the valve covers

23

BP guage goes into the pipes feeding the turbos.

vaccum pump could work but is a bandaid for the rear issue at fault. Plenty of ppl run venting systems like you run with no issues. Id say before you do anything find youre BPR and go from there. changing youre exhaust housing would benefit the most

24

how can I put a gauge on the pipes, i’d have to weld a connection on right?

25

congratsss

Also, alot of dsm guys have to run restrictors on journal bearing turbos, too much oil will blow your seals and even slug turbo. I have seen a 1k rpm difference in spool when I stepped it down with a restrictor on my PTE

26

dont change shit. get more seat time on the setup. congrats

27

why do they need to restrict them? what psi for oil they running? Us LS guys run as high as 80psi and none of us with correct drain size and journals need restrictors. Use -4 feed and minimal -10 drain and be set