vacuum diagram

[al4171990]

anyone know where i can get a vacuum diagram for a 1980 monte carlo v6 turbo 3.8 i have found plenty diagrams for a plain old 3.8 but not turbo. need a full diagram i already have a basic one but it doesnt help much
it has the same engine as a buick grand national i couldnt even find one for a GN though. thanks

[spoonraker]

http://www.amazon.com/Chiltons-Vacuum-Diagrams-1980-86-Domestic/dp/0801978211/ref=sr_1_1?ie=UTF8&s=books&qid=1200516477&sr=1-1

[Kelvin]

you need it for fuel, brakes, bov and boost gauge. that's it

[JesterMX6]

i got nothin for the turbo. sorry.

[David]

listen for the hissing.

[JesterMX6]

listen for the hissing.

:rofl::rofl::rofl:

story off my life

[al4171990]

i need to hook everything up actually its not my car its my moms and she wanted me to fix it for her were taking it back to all stock and we tore off all sorts of lines now i need to know where they all go back in!!
and you cant hear any hissing over how loud the carb on the damn thing is it hisses louder than anything

[al4171990]

thanks for all the help though.

[supercrackerbox]

you need it for fuel, brakes, bov and boost gauge. that's it

Ha, not for these engines. He's dealing with a boost-referenced draw-through Q-jet (might be a 2bbl, idk). The carb'd turbo 3.8 had the biggest cluster**** of vacuum lines I've ever seen in my life.

Google 'Before Black', should bring you to some websites that have a bunch of information on the '78-'81 turbo Buicks. I don't believe there's a forum, but there might be some contact info for someone who can lead you in the right direction. Or try a couple of the GN boards, surely someone on there has at least seen one of these dinosaurs.

[supercrackerbox]

Actually nevermind here it is:

http://home.flash.net/~rjgeorge/images/vac80abfed.JPG

http://home.flash.net/~rjgeorge/images/vac80abfed.JPG

And the link to the website, which seems to have a ton more info than when I last read it:

http://www.beforeblack.net/

[JesterMX6]

good lord and i thought the mx6 was bad:eek2smiley:

[Kelvin]

**** that egr ****. and **** that turbo carb setup

[supercrackerbox]

trust me thats next to nothing compared to how many lines there really
are that only shows the main lines all the other tiny ones are worse
anyone know what i should do exactly when i take the air pump off the
car i mean i can take it off and everything but im not rally used to air
pumps and how they work exactly.

Well really, that diagram *should* be everything you are supposed to have. But yeah, it makes it look a lot cleaner than it ever really is. There's a few pages of tech questions on that link, I think I saw one that covers the air pump setup.

Really what I would do (if you're willing to spend the $$) is buy an Edelbrock 4bbl intake for a 3.8, a turbo/supercharger carb "hat", and a boost referenced Q-jet (Jet Performance I think?) and turn it all around into a proper intake setup, and this would allow you to intercool it as well. Also get an MSD box that will retard the timing for a boosted engine so you can pitch that factory control box that should be on your fan shroud (does the same thing, but the MSD is more accurate and reliable). This setup would be much cleaner, actually make some sense, and run a lot better than the factory setup could ever hope to.

[al4171990]

yeah well in fine with the extra 20 horse it gets over the 305 that i have i think ill just adjust the waste gate actuator to get a little more boost out of it i know how much it can possibly handle before screwing it up really bad so i think ill just look around at some cheaper ways to add power a lot of people from chevrolet performance at a car how in chicago i went to suggested a performance cam to let the air in a little easier and bigger exhaust valves but getting bigger valves would cprobably cost a ton anyways i havent really looked at them much...

[al4171990]

do you think keeping the stock turbo "hat" with a better intak manifold would help at all becasue the stock one doesnt really look restricting at all and i dont really need an intercooler or anything were not looking to give it a ton of power just a little more haha

[al4171990]

heres some actualy pictures of the lines and the engine its self.
and yes i know its really dirty

http://i30.photobucket.com/albums/c338/al4171991/DSC_0038.jpg

http://i30.photobucket.com/albums/c338/al4171991/DSC_0039.jpg

http://i30.photobucket.com/albums/c338/al4171991/DSC_0037.jpg

http://i30.photobucket.com/albums/c338/al4171991/DSC_0040.jpg

[supercrackerbox]

OMG you got no brakes!! Damn I miss my Regal.

do you think keeping the stock turbo "hat" with a better intak manifold would help at all becasue the stock one doesnt really look restricting at all and i dont really need an intercooler or anything were not looking to give it a ton of power just a little more haha

Keep in mind that you're running a wet turbo, i.e., you have the air/fuel mix going through the turbo instead of just air. And yes, your factory setup is vastly more restrictive than the configuration I suggested. Your A/F mix comes out of the carb, goes through the turbo, and enters the manifold via two sharp 90* bends the way I remember it. By then the mix is going to be super hot, which is bad for performance any way you slice it. Also that control module box is sketchy enough to begin with. It's there to retard the timing under boost, but is going to be very limited as to how much. Remember, this is 1978 technology. So I'd be very careful about turning up the boost or the whole thing will probably go up in smoke. As for the bigger valves, they certainly wouldn't hurt, but there's plenty of other things that could be done before they'd show any real benefit.

This isn't the first carb'd turbo engine built in America, it was actually one of the last. Chevy tried it in the 60's on the Corvair. Ford did it with the 2.3 in 1979. None of them were ever known to be good performance engines. Each of the Big 3 had turbo engines with EFI as of 1984, and that's when things started to really take off.

[al4171990]

haha we had to take the master cylinder off to change the valve stem seals they were leaking gas into the cylinders and causeing tons of smoke so we had to pull it off to get the valve cover off were putting it all back together soon i hope... if we get the vacuum lines right lol

[al4171990]

okay so im going through all the vcacuum lines and i realize i haev basically no idea what some of these things are and where they are haha like the thermac motor i think i can find most of them but idk and does anyone know where exactly i should hook up a boost gauge? i was reading on another forum and someone said one place that may work is the line between the wastegate actuator and the compressor housing because the vacuum the actuator receives is on the other side of the actuator and the said they said to hook it up on recieves boost not vacuum anyone know??? of course the monte carlos didnt come with boost gauges so i have mo freakin clue. help!!!
thanks

[turbodaytona87]

trust me thats next to nothing compared to how many lines there really
are that only shows the main lines all the other tiny ones are worse
anyone know what i should do exactly when i take the air pump off the
car i mean i can take it off and everything but im not rally used to air
pumps and how they work exactly.

Well really, that diagram *should* be everything you are supposed to have. But yeah, it makes it look a lot cleaner than it ever really is. There's a few pages of tech questions on that link, I think I saw one that covers the air pump setup.

Really what I would do (if you're willing to spend the $$) is buy an Edelbrock 4bbl intake for a 3.8, a turbo/supercharger carb "hat", and a boost referenced Q-jet (Jet Performance I think?) and turn it all around into a proper intake setup, and this would allow you to intercool it as well. Also get an MSD box that will retard the timing for a boosted engine so you can pitch that factory control box that should be on your fan shroud (does the same thing, but the MSD is more accurate and reliable). This setup would be much cleaner, actually make some sense, and run a lot better than the factory setup could ever hope to.

What do you think about a blow through demon carb? My truck is just itching for some more power

[supercrackerbox]

Ask on the Mopar boards, there's a few that have done it.