this has me puzzled

[IH8TEC]

ok, now my motor is freshly built up, timing etc al set up properly, but i only get -8vac on my boost guage, when engine breaking it goes to -9, but wont go any further, anyone got any suggestions as to why this could be, i dont have any leaks of anything.

any suggestions, got me puzzled

[sergei]

Have you plugged in the guage in the right place (not T into purge line)...

[IH8TEC]

it's coming straight off the manifold. if you look closely you can see what i've written. i hate paint and can't edit the size of font

[IH8TEC]

only thing i can think maybe that i've been meaning to fix for a while, is how the wastegate hose is plumbed to the bov as well, i've been meaning to make them seperate lines

but would that affect it that much?

[sergei]

if it does not idle funny, then it is either faulty guage or blocked hose.

[IH8TEC]

maybe it's my guage then, dont think it will be hose becuase it reads boost fine. oh and it's a autometer pro-comp guage

[strap-on]

Can you feel it hit boost though, i know in that car you always used to be able to. So if you cant then maybe its not the gauge?

[IH8TEC]

yeah idles pretty good, and dan, it still feels like that just when off throttle doesn't read bugger all vaccum

[strap-on]

oops i understand now i thought it was reading too much,

[Lloyd]

Swap some hoses with other ones that should have manifold vacuum also and see if the gauge reads any different

[IH8TEC]

they are all the hoses i have onto there,
i dont have any of those vsv things hooked up, no a/c idle cause i dont have aircon. all i have is whats labelled in that pic, sorry i know it's hard to see

[Caveman]

Are you running the brake booster off the old oil breather pipe? If so not a good idea. The oil breather pipe goes before the throttle body which means off throttle theres no vacum getting to the brakes. Its supposed to run on vacum on throttle off (after the throttle body). If you have modified the old oil breather line to go into the manifold disregaurd what I said

Another thing I noticed, you have the petrol breather going after the throttle body Put it before the throttle body as it is from factory.

[IH8TEC]

Are you running the brake booster off the old oil breather pipe? If so not a good idea. The oil breather pipe goes before the throttle body which means off throttle theres no vacum getting to the brakes. Its supposed to run on vacum on throttle off (after the throttle body). If you have modified the old oil breather line to go into the manifold disregaurd what I said

disregarded

umm, good point abotu the petrol breather one, wasnt' too sure which side it was meant to go on. will try that, thanks.

by the way, new turbo is on

[dotdog]

Have you still got that dodgy old autometer gauge on it that the car came with?

[Caveman]

Are you running the brake booster off the old oil breather pipe? If so not a good idea. The oil breather pipe goes before the throttle body which means off throttle theres no vacum getting to the brakes. Its supposed to run on vacum on throttle off (after the throttle body). If you have modified the old oil breather line to go into the manifold disregaurd what I said

disregarded

umm, good point abotu the petrol breather one, wasnt' too sure which side it was meant to go on. will try that, thanks.

by the way, new turbo is on

Oh sweet your engine bay is looking mint as

You should try come to the torque performance dyno day, a few of us are going to try make it. Would be interesting to see what figure you pull.

[IH8TEC]

i have to get it the car tuned first, so i'm just gona do it all at once, get edgell's to tune it on is it the velocity dyno? the new rolling road on north shore

but yeah, gotta sort the radiator out a bit more to fit better. then look at dyno time, i need about an hour on there i'd say

sounds cool though

[IH8TEC]

dylan, i owe you a beer mate, turned out to be that line going from charcoal canister, i now have -16 just from a quick start from cold.

thanks

[Caveman]

Sweet as glad I could help out

[IH8TEC]

i'll post a pic when i've fixed the radiator.

michael, yeah it's that guage, fixed the vaccum problem, and guage reads accurate now aye, i have a 6psi wastegate spring and if i turn boost controller right down it shows 6psi