external wastegate problems?
 

alright so i've got the 35mm fake tial wastegate with a 6 psi spring. it opens fine at 6 psi and i get no spikes at all with it. the only thing is, when my car is idling and in low rpms, it sounds like a big ass exhaust leak, so i'm assuming the wg is open somehow? i never paid much attention to it b/c it functions properly and i didn't know if this was normal or not, shouldn't it stay completely shut like it's not even there until it reaches 6 psi? also the reason i think something's up with it is that my boost controller doesn't seem to be affecting it, it's still opening at 6 psi??? i have the boost controller in line between the side port on the wg and a direct source of vacuum from the im, i'm just venting the top nipple on the wg.

Re:external wastegate problems?
 

this is why man.

your boost controller has to be inline with the top nipple on your WG to work.

the bottom nipple should be a striahgt hose from IM, the top nipple should be a hose with controller inline going to it

get it? heh

Re:external wastegate problems?
 

it should be closed, the only time I've ever heard a wastegate doing that is when you hook it up on the top (wrong). Just disconnect everything off the wastegate and see if it sounds normal, it should be shut at idle with no lines going to it. If you think its open, put your hand on the dump tube and see if hot air is coming out.

Re:external wastegate problems?
 

jeff correct me if i am wrong, but u cant put the boost controller on the bottom nipple feed line..

Re:external wastegate problems?
 

i always thought the boost controller was up top and the bottom/side nipple was straight to a vacuum source, but lately all i've been hearing is top nipple = vent, side/bottom for boost controller if you're running one, and straight hook up if you're not??? so jeff, what should i do if i disconnect the lines and it is open at idle, what would cause this and how could i fix it?

Re:external wastegate problems?
 

boost controllers are always on the top nipple, because they bleed boost presure to the top of the diaphragm to prevent it from opening sooner.

which is why a boost controller can only raise boost, not lower it.

Re:external wastegate problems?
 

so should i vent the side or leave it to the im also?

Re:external wastegate problems?
 

side nip should be right to intake.

the top should have your boost controller inline with it.

itll work go try it.

Re:external wastegate problems?
 

i'll check in a little bit, i get off work in about 1/2 hour. i tried it that way with my hmbc, but i don't think that thing worked anyways. i hope that ---- works, 6 lbs is ------ old news, i'm ready for 12 ;D

Re:external wastegate problems?
 

what i did is plug off the top port and put a MBC inline with the lower port.works really well with no spik at all.

Re:external wastegate problems?
 

that will only work to the setting of the spring. if the spring in yours is 10psi, sure your MBC will work till 10psi.

when u apply pressure to the top of the diaphragm in your wastegate u can increase boost above the spring tension.

Re:external wastegate problems?
 

on my tial wg i have a mbc in the line coming from the manifold/ boost source, to the side port of the wg. the top port is vented into the atmospere.the tial has a 3.63 psi spring in it and i am boosting to 5.5-6 psi with no problems at all.everywhere i have read said the top port is for an electronic boost controller.

Re:external wastegate problems?
 

mine has a 4 psi spring and i am now running 10psi with the MBC..i`ve cranked it up to 15 psi a few times too.. ;D

Re:external wastegate problems?
 

The top niple if for an ellectronic boost controller. I use the side niple straight to the manifold or turbo. If you use a MBC you should run it in line with the side niple. Top of the wg should see atmospheric pressure. 98ctr

Re:external wastegate problems?
 

we told you not to buy that POS wastegate kevin.. when will you metrosexuals ever learn?

Re:external wastegate problems?
 

wastegate's fine bitch, i'm gonna kill you. come to find out, when i put the wastegate on, i was in such a hurry, i didn't put the metal seal ring in the bottom, so basically, for the past 5 months, i've had a half ass boosted car, put that ---- in and it sounds like stock now (use to sound like open headers), and the turbo spools up a million times faster, i'll have some video soon, my fukn manifold cracked as soon as i upped the boost to 9psi, oh fukn well. ---- is mad fast now and all i hear is turbo spool, then a loud as rfl bov, it's good to be me ;D

Re:external wastegate problems?
 

Well see the wastegate was compensating for your slipping clutch. just think the clutch would have burned up that much faster with the added boost.

Why again do you want to kill me?

Re:external wastegate problems?
 

^^I was waiting for someone to say that. If you plug the top nipple that should make the wastegate useless, wouldn't it? It wouldn't be able to move.

Is that manifold that cracked the SSatuocrap you were using? Where did it crack? Any pics?
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Re:external wastegate problems?
 

^^^ see, that's what i thought too? but it works fine how i have it hooked up now, so i'll leave it as is. no cracks of the manifold, but it was cracked on ever runner and at the collector. i took it to my exhaust man and he rewelded the whole thing and put some more braces on it. the reason it cracke is b/c the stock braces fell off (they just had little tack welds holding them in place), up until then, it was fine for 5 mos., so i'm assuming it should be good for a while.

Re:external wastegate problems?
 

Thats how its done right there.

And if you forgot the seal ring your an idiot.., but we still love you :-*

Re:external wastegate problems?
 

yeah, i drove my car sounding like open headers for 5 mos. and just thought it was normal b/c i didn't have a dump tube ::) it's like a whole new car now, sounds stock, turbo actually spools up, don't smell like exhaust when i get out of the car, etc., etc. the day the wg came in, i was in such a hurry going to big race, i took it out, bolted it up and drove.............

Re:external wastegate problems?
 

man, wtf? i had the boost controller hooked up originally to the top port and the side port straight to a vacuum source, i had it like this for a few days and the bc was working fine, was fully adjustable, no spikes, everything was perfect, turbo spooled quick as hell. i thought you were only suppose to hook up electronic bc's like that, but it worked fine, so i left it. then i'm reading around and hear that that is very dangerous and bad, so i swith it to the top port just venting, and the bc in line with the side port and now i have some serious lag. what is the danger of having it hooked up how i did with the top port to bc and side port to vacuum if it works fine?

Re:external wastegate problems?
 

i got my boost controler hooked up like it says in the instructions. between the turbo compressor housing and the wastegate actuator, does this cause more lag then connecting it between the intake manifold and wastegate actuator?

Re:external wastegate problems?
 

it actually spools faster when you hook it up to intake manifold rather than the compressor housing.

Re:external wastegate problems?
 

you're actually losing boost that way, the wastegate sees x amount of boost from the compressor, but by the time it goes through your intercooler, piping, etc, you've lost 1 or 2 psi, where as if you have it directly to your im, that is the actual boost that is going to your engine, so you're actually boostin a couple less pounds than you think.

Re:external wastegate problems?
 

dam no wonder i spool up 10psi at 6k rpm w/.60 trim t3 in 2nd gear. fuk! ima do that ---- right tommorow. but isn't what my boost gauge reads the actual psi i'm running? it's hooked upto the intake manifold. i'd hate to have to retune this crap again. :'(

Re:external wastegate problems?
 

yeah, as long as your boost gauge says that's what you're running, then i guess you are. but like if you have an 8 psi spring in your wg, and hook it up at the comp. and you're only running 6 or 7 psi, it's b/c of the pressure lost betweent comp. and intake. it doesn't really matter if you have a boost controller cause you can just raise it anyways, but if your boost gauge is in the im, then whatever is reads is correct.

Re:external wastegate problems?
 

Both the BOV and the wg are connected inline with the fuel pressure regulator. the car builds 10psi in first gear before 5500k rpm and in 2nd gear 10psi by 4800 rpm. Vtec is set at 4500 rpm. it builds up boost way faster connected this way. i also pluged the nipple on the compressor with a rubber boot. Is the BOV a better place to connect it to then inline with the Boost gauge which is connected under the intake manual inline with the cruise control?

Re:external wastegate problems?
 

i have my boost gauge t'd in the same place you do, and i have my bov t'd in to my fpr, and then my wg t'd in to my bov. which sounds like teh same way you have it, mine spools up pretty fast this way also.

Re:external wastegate problems?
 

cool dude, thanks for all you guys help.